СЕССИЯ УСТРОЙСТВА

rehabapp_2026-09-22_16-06-21

Подключение…

Rehab Logger console · история загружается порциями по 250 записей

16:06:29.499142 INFO [console] [ChatWebSocket] subscribe send: {channel: private-user.324, auth: local-reverb-key:99cf53579b80ab4c44f289fc556d7360928e8f9a9be4f79eed5adce29d567e89}

16:06:29.497662 INFO [console] [DIO] server: openresty

16:06:29.497830 INFO [console] [DIO] Response Text:

16:06:29.498037 INFO [console] [DIO] {"auth":"local-reverb-key:99cf53579b80ab4c44f289fc556d7360928e8f9a9be4f79eed5adce29d567e89"}

16:06:29.497055 INFO [console] [DIO] transfer-encoding: chunked

16:06:29.497314 INFO [console] [DIO] access-control-allow-origin: http://localhost:3000

16:06:29.497491 INFO [console] [DIO] content-type: application/json

16:06:29.496547 INFO [console] [DIO] connection: keep-alive

16:06:29.496714 INFO [console] [DIO] cache-control: no-cache, private

16:06:29.496876 INFO [console] [DIO] date: Tue, 22 Sep 2026 13:06:29 GMT

16:06:29.495994 INFO [console] [DIO] headers:

16:06:29.496177 INFO [console] [DIO] x-served-by: rehabilitation.most.team

16:06:29.496355 INFO [console] [DIO] access-control-allow-credentials: true

16:06:29.495532 INFO [console] [DIO] uri: https://rehabilitation.most.team/api/broadcasting/auth

16:06:29.495736 INFO [console] [DIO] statusCode: 200

16:06:29.495891 INFO [console] [DIO] statusMessage: OK

16:06:29.447454 INFO [console] [ChatWebSocket] incoming envelope: event=pusher_internal:subscription_succeeded, channel=private-chat.121, data={}

16:06:29.447584 INFO [console] [ChatWebSocket] subscription succeeded: private-chat.121

16:06:29.495126 INFO [console] [DIO] *** Response ***

16:06:29.443274 INFO [console] [DIO] {socket_id: 981162654.605214000, channel_name: private-user.324}

16:06:29.443343 INFO [console] [DIO]

16:06:29.447245 INFO [console] [ChatWebSocket] incoming raw: type=String, data={"event":"pusher_internal:subscription_succeeded","data":"{}","channel":"private-chat.121"}

16:06:29.443076 INFO [console] [DIO] content-type: application/x-www-form-urlencoded

16:06:29.443119 INFO [console] [DIO] Authorization: Bearer 768|0VqB9oq4rJLHonOPuJFUBc4D6YaW5mqDHk9mLj7Cb772150c

16:06:29.443206 INFO [console] [DIO] data:

16:06:29.442851 INFO [console] [DIO] extra: {}

16:06:29.442940 INFO [console] [DIO] headers:

16:06:29.442985 INFO [console] [DIO] accept: application/json

16:06:29.442576 INFO [console] [DIO] receiveTimeout: 0:00:10.000000

16:06:29.442681 INFO [console] [DIO] transformTimeout: null

16:06:29.442724 INFO [console] [DIO] receiveDataWhenStatusError: true

16:06:29.442427 INFO [console] [DIO] persistentConnection: true

16:06:29.442480 INFO [console] [DIO] connectTimeout: 0:00:10.000000

16:06:29.442534 INFO [console] [DIO] sendTimeout: null

16:06:29.442301 INFO [console] [DIO] method: POST

16:06:29.442352 INFO [console] [DIO] responseType: ResponseType.json

16:06:29.442391 INFO [console] [DIO] followRedirects: true

16:06:29.437398 INFO [console] [ChatWebSocket] auth request: socketId=981162654.605214000, channel=private-user.324

16:06:29.442044 INFO [console] [DIO] *** Request ***

16:06:29.442217 INFO [console] [DIO] uri: https://rehabilitation.most.team/api/broadcasting/auth

16:06:29.426473 INFO [console] [DIO]

16:06:29.426952 INFO [console] [ChatWebSocket] auth response: status=200, data={auth: local-reverb-key:393268924c147f849419684c287c4f5e034ee1782775e462aeca8b43fdea5e13}

16:06:29.427133 INFO [console] [ChatWebSocket] subscribe send: {channel: private-chat.121, auth: local-reverb-key:393268924c147f849419684c287c4f5e034ee1782775e462aeca8b43fdea5e13}

16:06:29.426214 INFO [console] [DIO] server: openresty

16:06:29.426293 INFO [console] [DIO] Response Text:

16:06:29.426394 INFO [console] [DIO] {"auth":"local-reverb-key:393268924c147f849419684c287c4f5e034ee1782775e462aeca8b43fdea5e13"}

16:06:29.425934 INFO [console] [DIO] transfer-encoding: chunked

16:06:29.426021 INFO [console] [DIO] access-control-allow-origin: http://localhost:3000

16:06:29.426127 INFO [console] [DIO] content-type: application/json

16:06:29.425669 INFO [console] [DIO] connection: keep-alive

16:06:29.425758 INFO [console] [DIO] cache-control: no-cache, private

16:06:29.425845 INFO [console] [DIO] date: Tue, 22 Sep 2026 13:06:29 GMT

16:06:29.425347 INFO [console] [DIO] headers:

16:06:29.425467 INFO [console] [DIO] x-served-by: rehabilitation.most.team

16:06:29.425569 INFO [console] [DIO] access-control-allow-credentials: true

16:06:29.425056 INFO [console] [DIO] uri: https://rehabilitation.most.team/api/broadcasting/auth

16:06:29.425177 INFO [console] [DIO] statusCode: 200

16:06:29.425291 INFO [console] [DIO] statusMessage: OK

16:06:29.352211 INFO [console] [DIO] {socket_id: 981162654.605214000, channel_name: private-chat.121}

16:06:29.352259 INFO [console] [DIO]

16:06:29.424868 INFO [console] [DIO] *** Response ***

16:06:29.352071 INFO [console] [DIO] content-type: application/x-www-form-urlencoded

16:06:29.352108 INFO [console] [DIO] Authorization: Bearer 768|0VqB9oq4rJLHonOPuJFUBc4D6YaW5mqDHk9mLj7Cb772150c

16:06:29.352141 INFO [console] [DIO] data:

16:06:29.351926 INFO [console] [DIO] extra: {}

16:06:29.351979 INFO [console] [DIO] headers:

16:06:29.352029 INFO [console] [DIO] accept: application/json

16:06:34.994221 ERROR [widgets library] Null check operator used on a null value

Null check operator used on a null value

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#195    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#196    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#197    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#198    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#199    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#200    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#201    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#202    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#203    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#204    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#205    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#206    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#207    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#208    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#209    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#210    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#211    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#212    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#213    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#214    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#215    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#216    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#217    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#218    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#219    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#220    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#221    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#222    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#223    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#224    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#225    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#226    Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#227    MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#228    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#229    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#230    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#231    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#232    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#233    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#234    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#235    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#236    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#237    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#238    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#239    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#240    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#241    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#242    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#243    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#244    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#245    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#246    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#247    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#248    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#249    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#250    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#251    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#252    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#253    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#254    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#255    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#256    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#257    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#258    BuildScope._tryRebuild (package:flutter/src/widgets/framework.dart:2750:15)
#259    BuildScope._flushDirtyElements (package:flutter/src/widgets/framework.dart:2807:11)
#260    BuildOwner.buildScope (package:flutter/src/widgets/framework.dart:3111:18)
#261    WidgetsBinding.drawFrame (package:flutter/src/widgets/binding.dart:1571:21)
#262    RendererBinding._handlePersistentFrameCallback (package:flutter/src/rendering/binding.dart:509:5)
#263    SchedulerBinding._invokeFrameCallback (package:flutter/src/scheduler/binding.dart:1430:15)
#264    SchedulerBinding.handleDrawFrame (package:flutter/src/scheduler/binding.dart:1345:9)
#265    SchedulerBinding._handleDrawFrame (package:flutter/src/scheduler/binding.dart:1198:5)
#266    _rootRun (dart:async/zone_root.dart:35:13)
#267    _CustomZone.run (dart:async/zone.dart:726:19)
#268    _CustomZone.runGuarded (dart:async/zone.dart:625:7)
#269    _invoke (dart:ui/hooks.dart:425:10)
#270    PlatformDispatcher._drawFrame (dart:ui/platform_dispatcher.dart:447:5)
#271    _drawFrame (dart:ui/hooks.dart:395:31)

16:06:35.776509 ERROR [widgets library] Null check operator used on a null value

Null check operator used on a null value

#0      _TrainingDayItemState.build (package:testapp/features/calendar_page/presentation/widgets/day_details/training_day_item.dart:56:43)
#1      StatefulElement.build (package:flutter/src/widgets/framework.dart:5931:27)
#2      ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5817:15)
#3      StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#4      Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#5      StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#6      Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#7      SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#8      Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#9      SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#10     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#11     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#12     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#13     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#14     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#15     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#16     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#17     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#18     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#19     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#20     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#21     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#22     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#23     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#24     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#25     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#26     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#27     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#28     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#29     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#30     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#31     StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#32     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#33     SliverMultiBoxAdaptorElement.updateChild (package:flutter/src/widgets/sliver.dart:1086:37)
#34     SliverMultiBoxAdaptorElement.performRebuild.processElement (package:flutter/src/widgets/sliver.dart:979:35)
#35     Iterable.forEach (dart:core/iterable.dart:366:35)
#36     SliverMultiBoxAdaptorElement.performRebuild (package:flutter/src/widgets/sliver.dart:1032:24)
#37     SliverMultiBoxAdaptorElement.update (package:flutter/src/widgets/sliver.dart:955:7)
#38     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#39     Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#40     MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#41     _ViewportElement.update (package:flutter/src/widgets/viewport.dart:293:11)
#42     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#43     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#44     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#45     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#46     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#47     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#48     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#49     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#50     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#51     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#52     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#53     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#54     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#55     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#56     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#57     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#58     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#59     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#60     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#61     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#62     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#63     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#64     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#65     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#66     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#67     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#68     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#69     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#70     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#71     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#72     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#73     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#74     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#75     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#76     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#77     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#78     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#79     StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#80     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#81     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#82     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#83     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#84     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#85     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#86     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#87     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#88     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#89     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#90     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#91     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#92     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#93     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#94     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#95     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#96     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#97     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#98     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#99     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#100    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#101    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#102    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#103    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#104    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#105    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#106    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#107    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#108    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#109    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#110    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#111    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#112    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#113    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#114    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#115    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#116    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#117    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#118    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#119    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#120    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#121    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#122    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#123    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#124    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#125    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#126    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#127    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#128    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#129    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#130    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#131    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#132    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#133    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#134    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#135    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#136    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#137    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#138    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#139    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#140    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#141    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#142    Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#143    MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#144    _ViewportElement.update (package:flutter/src/widgets/viewport.dart:293:11)
#145    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#146    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#147    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#148    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#149    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#150    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#151    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#152    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#153    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#154    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#155    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#156    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#157    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#158    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#159    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#160    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#161    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#162    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#163    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#164    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#165    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#166    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#167    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#168    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#169    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#170    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#171    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#172    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#173    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#174    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#175    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#176    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#177    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#178    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#179    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#180    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#181    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#182    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#183    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#184    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#185    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#186    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#187    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#188    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#189    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#190    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#191    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#192    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#193    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#194    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#195    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#196    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#197    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#198    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#199    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#200    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#201    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#202    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#203    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#204    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#205    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#206    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#207    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#208    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#209    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#210    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#211    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#212    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#213    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#214    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#215    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#216    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#217    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#218    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#219    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#220    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#221    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#222    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#223    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#224    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#225    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#226    Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#227    MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#228    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#229    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#230    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#231    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#232    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#233    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#234    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#235    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#236    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#237    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#238    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#239    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#240    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#241    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#242    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#243    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#244    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#245    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#246    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#247    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#248    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#249    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#250    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#251    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#252    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#253    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#254    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#255    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#256    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#257    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#258    BuildScope._tryRebuild (package:flutter/src/widgets/framework.dart:2750:15)
#259    BuildScope._flushDirtyElements (package:flutter/src/widgets/framework.dart:2807:11)
#260    BuildOwner.buildScope (package:flutter/src/widgets/framework.dart:3111:18)
#261    WidgetsBinding.drawFrame (package:flutter/src/widgets/binding.dart:1571:21)
#262    RendererBinding._handlePersistentFrameCallback (package:flutter/src/rendering/binding.dart:509:5)
#263    SchedulerBinding._invokeFrameCallback (package:flutter/src/scheduler/binding.dart:1430:15)
#264    SchedulerBinding.handleDrawFrame (package:flutter/src/scheduler/binding.dart:1345:9)
#265    SchedulerBinding._handleDrawFrame (package:flutter/src/scheduler/binding.dart:1198:5)
#266    _rootRun (dart:async/zone_root.dart:35:13)
#267    _CustomZone.run (dart:async/zone.dart:726:19)
#268    _CustomZone.runGuarded (dart:async/zone.dart:625:7)
#269    _invoke (dart:ui/hooks.dart:425:10)
#270    PlatformDispatcher._drawFrame (dart:ui/platform_dispatcher.dart:447:5)
#271    _drawFrame (dart:ui/hooks.dart:395:31)

16:06:35.808446 ERROR [widgets library] Null check operator used on a null value

Null check operator used on a null value

#0      _TrainingDayItemState.build (package:testapp/features/calendar_page/presentation/widgets/day_details/training_day_item.dart:56:43)
#1      StatefulElement.build (package:flutter/src/widgets/framework.dart:5931:27)
#2      ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5817:15)
#3      StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#4      Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#5      StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#6      Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#7      SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#8      Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#9      SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#10     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#11     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#12     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#13     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#14     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#15     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#16     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#17     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#18     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#19     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#20     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#21     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#22     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#23     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#24     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#25     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#26     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#27     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#28     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#29     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#30     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#31     StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#32     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#33     SliverMultiBoxAdaptorElement.updateChild (package:flutter/src/widgets/sliver.dart:1086:37)
#34     SliverMultiBoxAdaptorElement.performRebuild.processElement (package:flutter/src/widgets/sliver.dart:979:35)
#35     Iterable.forEach (dart:core/iterable.dart:366:35)
#36     SliverMultiBoxAdaptorElement.performRebuild (package:flutter/src/widgets/sliver.dart:1032:24)
#37     SliverMultiBoxAdaptorElement.update (package:flutter/src/widgets/sliver.dart:955:7)
#38     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#39     Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#40     MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#41     _ViewportElement.update (package:flutter/src/widgets/viewport.dart:293:11)
#42     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#43     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#44     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#45     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#46     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#47     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#48     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#49     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#50     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#51     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#52     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#53     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#54     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#55     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#56     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#57     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#58     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#59     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#60     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#61     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#62     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#63     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#64     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#65     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#66     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#67     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#68     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#69     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#70     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#71     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#72     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#73     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#74     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#75     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#76     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#77     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#78     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#79     StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#80     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#81     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#82     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#83     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#84     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#85     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#86     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#87     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#88     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#89     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#90     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#91     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#92     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#93     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#94     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#95     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#96     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#97     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#98     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#99     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#100    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#101    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#102    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#103    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#104    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#105    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#106    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#107    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#108    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#109    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#110    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#111    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#112    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#113    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#114    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#115    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#116    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#117    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#118    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#119    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#120    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#121    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#122    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#123    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#124    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#125    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#126    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#127    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#128    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#129    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#130    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#131    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#132    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#133    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#134    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#135    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#136    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#137    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#138    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#139    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#140    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#141    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#142    Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#143    MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#144    _ViewportElement.update (package:flutter/src/widgets/viewport.dart:293:11)
#145    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#146    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#147    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#148    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#149    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#150    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#151    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#152    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#153    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#154    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#155    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#156    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#157    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#158    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#159    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#160    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#161    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#162    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#163    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#164    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#165    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#166    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#167    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#168    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#169    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#170    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#171    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#172    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#173    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#174    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#175    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#176    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#177    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#178    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#179    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#180    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#181    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#182    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#183    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#184    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#185    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#186    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#187    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#188    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#189    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#190    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#191    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#192    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#193    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#194    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#195    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#196    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#197    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#198    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#199    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#200    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#201    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#202    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#203    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#204    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#205    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#206    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#207    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#208    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#209    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#210    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#211    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#212    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#213    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#214    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#215    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#216    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#217    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#218    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#219    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#220    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#221    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#222    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#223    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#224    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#225    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#226    Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#227    MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#228    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#229    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#230    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#231    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#232    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#233    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#234    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#235    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#236    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#237    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#238    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#239    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#240    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#241    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#242    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#243    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#244    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#245    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#246    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#247    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#248    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#249    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#250    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#251    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#252    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#253    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#254    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#255    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#256    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#257    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#258    BuildScope._tryRebuild (package:flutter/src/widgets/framework.dart:2750:15)
#259    BuildScope._flushDirtyElements (package:flutter/src/widgets/framework.dart:2807:11)
#260    BuildOwner.buildScope (package:flutter/src/widgets/framework.dart:3111:18)
#261    WidgetsBinding.drawFrame (package:flutter/src/widgets/binding.dart:1571:21)
#262    RendererBinding._handlePersistentFrameCallback (package:flutter/src/rendering/binding.dart:509:5)
#263    SchedulerBinding._invokeFrameCallback (package:flutter/src/scheduler/binding.dart:1430:15)
#264    SchedulerBinding.handleDrawFrame (package:flutter/src/scheduler/binding.dart:1345:9)
#265    SchedulerBinding._handleDrawFrame (package:flutter/src/scheduler/binding.dart:1198:5)
#266    _rootRun (dart:async/zone_root.dart:35:13)
#267    _CustomZone.run (dart:async/zone.dart:726:19)
#268    _CustomZone.runGuarded (dart:async/zone.dart:625:7)
#269    _invoke (dart:ui/hooks.dart:425:10)
#270    PlatformDispatcher._drawFrame (dart:ui/platform_dispatcher.dart:447:5)
#271    _drawFrame (dart:ui/hooks.dart:395:31)

16:06:35.842656 ERROR [widgets library] Null check operator used on a null value

Null check operator used on a null value

#0      _TrainingDayItemState.build (package:testapp/features/calendar_page/presentation/widgets/day_details/training_day_item.dart:56:43)
#1      StatefulElement.build (package:flutter/src/widgets/framework.dart:5931:27)
#2      ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5817:15)
#3      StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#4      Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#5      StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#6      Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#7      SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#8      Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#9      SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#10     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#11     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#12     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#13     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#14     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#15     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#16     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#17     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#18     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#19     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#20     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#21     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#22     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#23     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#24     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#25     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#26     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#27     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#28     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#29     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#30     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#31     StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#32     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#33     SliverMultiBoxAdaptorElement.updateChild (package:flutter/src/widgets/sliver.dart:1086:37)
#34     SliverMultiBoxAdaptorElement.performRebuild.processElement (package:flutter/src/widgets/sliver.dart:979:35)
#35     Iterable.forEach (dart:core/iterable.dart:366:35)
#36     SliverMultiBoxAdaptorElement.performRebuild (package:flutter/src/widgets/sliver.dart:1032:24)
#37     SliverMultiBoxAdaptorElement.update (package:flutter/src/widgets/sliver.dart:955:7)
#38     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#39     Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#40     MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#41     _ViewportElement.update (package:flutter/src/widgets/viewport.dart:293:11)
#42     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#43     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#44     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#45     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#46     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#47     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#48     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#49     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#50     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#51     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#52     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#53     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#54     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#55     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#56     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#57     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#58     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#59     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#60     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#61     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#62     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#63     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#64     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#65     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#66     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#67     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#68     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#69     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#70     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#71     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#72     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#73     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#74     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#75     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#76     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#77     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#78     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#79     StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#80     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#81     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#82     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#83     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#84     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#85     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#86     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#87     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#88     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#89     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#90     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#91     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#92     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#93     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#94     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#95     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#96     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#97     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#98     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#99     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#100    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#101    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#102    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#103    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#104    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#105    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#106    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#107    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#108    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#109    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#110    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#111    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#112    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#113    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#114    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#115    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#116    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#117    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#118    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#119    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#120    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#121    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#122    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#123    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#124    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#125    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#126    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#127    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#128    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#129    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#130    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#131    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#132    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#133    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#134    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#135    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#136    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#137    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#138    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#139    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#140    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#141    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#142    Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#143    MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#144    _ViewportElement.update (package:flutter/src/widgets/viewport.dart:293:11)
#145    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#146    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#147    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#148    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#149    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#150    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#151    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#152    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#153    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#154    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#155    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#156    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#157    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#158    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#159    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#160    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#161    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#162    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#163    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#164    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#165    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#166    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#167    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#168    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#169    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#170    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#171    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#172    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#173    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#174    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#175    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#176    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#177    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#178    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#179    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#180    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#181    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#182    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#183    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#184    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#185    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#186    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#187    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#188    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#189    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#190    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#191    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#192    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#193    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#194    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#195    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#196    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#197    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#198    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#199    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#200    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#201    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#202    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#203    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#204    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#205    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#206    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#207    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#208    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#209    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#210    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#211    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#212    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#213    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#214    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#215    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#216    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#217    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#218    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#219    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#220    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#221    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#222    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#223    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#224    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#225    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#226    Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#227    MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#228    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#229    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#230    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#231    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#232    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#233    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#234    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#235    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#236    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#237    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#238    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#239    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#240    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#241    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#242    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#243    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#244    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#245    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#246    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#247    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#248    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#249    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#250    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#251    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#252    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#253    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#254    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#255    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#256    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#257    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#258    BuildScope._tryRebuild (package:flutter/src/widgets/framework.dart:2750:15)
#259    BuildScope._flushDirtyElements (package:flutter/src/widgets/framework.dart:2807:11)
#260    BuildOwner.buildScope (package:flutter/src/widgets/framework.dart:3111:18)
#261    WidgetsBinding.drawFrame (package:flutter/src/widgets/binding.dart:1571:21)
#262    RendererBinding._handlePersistentFrameCallback (package:flutter/src/rendering/binding.dart:509:5)
#263    SchedulerBinding._invokeFrameCallback (package:flutter/src/scheduler/binding.dart:1430:15)
#264    SchedulerBinding.handleDrawFrame (package:flutter/src/scheduler/binding.dart:1345:9)
#265    SchedulerBinding._handleDrawFrame (package:flutter/src/scheduler/binding.dart:1198:5)
#266    _rootRun (dart:async/zone_root.dart:35:13)
#267    _CustomZone.run (dart:async/zone.dart:726:19)
#268    _CustomZone.runGuarded (dart:async/zone.dart:625:7)
#269    _invoke (dart:ui/hooks.dart:425:10)
#270    PlatformDispatcher._drawFrame (dart:ui/platform_dispatcher.dart:447:5)
#271    _drawFrame (dart:ui/hooks.dart:395:31)

16:06:35.675701 ERROR [widgets library] Null check operator used on a null value

Null check operator used on a null value

#0      _TrainingDayItemState.build (package:testapp/features/calendar_page/presentation/widgets/day_details/training_day_item.dart:56:43)
#1      StatefulElement.build (package:flutter/src/widgets/framework.dart:5931:27)
#2      ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5817:15)
#3      StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#4      Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#5      StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#6      Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#7      SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#8      Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#9      SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#10     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#11     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#12     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#13     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#14     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#15     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#16     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#17     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#18     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#19     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#20     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#21     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#22     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#23     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#24     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#25     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#26     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#27     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#28     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#29     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#30     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#31     StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#32     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#33     SliverMultiBoxAdaptorElement.updateChild (package:flutter/src/widgets/sliver.dart:1086:37)
#34     SliverMultiBoxAdaptorElement.performRebuild.processElement (package:flutter/src/widgets/sliver.dart:979:35)
#35     Iterable.forEach (dart:core/iterable.dart:366:35)
#36     SliverMultiBoxAdaptorElement.performRebuild (package:flutter/src/widgets/sliver.dart:1032:24)
#37     SliverMultiBoxAdaptorElement.update (package:flutter/src/widgets/sliver.dart:955:7)
#38     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#39     Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#40     MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#41     _ViewportElement.update (package:flutter/src/widgets/viewport.dart:293:11)
#42     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#43     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#44     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#45     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#46     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#47     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#48     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#49     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#50     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#51     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#52     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#53     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#54     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#55     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#56     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#57     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#58     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#59     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#60     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#61     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#62     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#63     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#64     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#65     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#66     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#67     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#68     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#69     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#70     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#71     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#72     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#73     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#74     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#75     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#76     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#77     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#78     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#79     StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#80     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#81     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#82     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#83     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#84     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#85     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#86     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#87     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#88     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#89     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#90     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#91     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#92     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#93     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#94     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#95     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#96     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#97     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#98     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#99     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#100    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#101    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#102    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#103    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#104    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#105    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#106    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#107    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#108    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#109    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#110    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#111    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#112    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#113    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#114    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#115    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#116    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#117    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#118    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#119    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#120    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#121    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#122    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#123    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#124    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#125    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#126    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#127    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#128    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#129    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#130    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#131    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#132    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#133    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#134    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#135    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#136    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#137    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#138    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#139    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#140    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#141    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#142    Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#143    MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#144    _ViewportElement.update (package:flutter/src/widgets/viewport.dart:293:11)
#145    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#146    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#147    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#148    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#149    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#150    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#151    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#152    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#153    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#154    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#155    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#156    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#157    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#158    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#159    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#160    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#161    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#162    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#163    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#164    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#165    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#166    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#167    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#168    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#169    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#170    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#171    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#172    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#173    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#174    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#175    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#176    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#177    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#178    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#179    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#180    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#181    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#182    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#183    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#184    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#185    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#186    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#187    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#188    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#189    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#190    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#191    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#192    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#193    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#194    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#195    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#196    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#197    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#198    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#199    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#200    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#201    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#202    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#203    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#204    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#205    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#206    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#207    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#208    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#209    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#210    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#211    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#212    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#213    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#214    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#215    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#216    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#217    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#218    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#219    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#220    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#221    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#222    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#223    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#224    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#225    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#226    Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#227    MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#228    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#229    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#230    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#231    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#232    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#233    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#234    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#235    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#236    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#237    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#238    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#239    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#240    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#241    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#242    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#243    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#244    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#245    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#246    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#247    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#248    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#249    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#250    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#251    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#252    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#253    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#254    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#255    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#256    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#257    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#258    BuildScope._tryRebuild (package:flutter/src/widgets/framework.dart:2750:15)
#259    BuildScope._flushDirtyElements (package:flutter/src/widgets/framework.dart:2807:11)
#260    BuildOwner.buildScope (package:flutter/src/widgets/framework.dart:3111:18)
#261    WidgetsBinding.drawFrame (package:flutter/src/widgets/binding.dart:1571:21)
#262    RendererBinding._handlePersistentFrameCallback (package:flutter/src/rendering/binding.dart:509:5)
#263    SchedulerBinding._invokeFrameCallback (package:flutter/src/scheduler/binding.dart:1430:15)
#264    SchedulerBinding.handleDrawFrame (package:flutter/src/scheduler/binding.dart:1345:9)
#265    SchedulerBinding._handleDrawFrame (package:flutter/src/scheduler/binding.dart:1198:5)
#266    _rootRun (dart:async/zone_root.dart:35:13)
#267    _CustomZone.run (dart:async/zone.dart:726:19)
#268    _CustomZone.runGuarded (dart:async/zone.dart:625:7)
#269    _invoke (dart:ui/hooks.dart:425:10)
#270    PlatformDispatcher._drawFrame (dart:ui/platform_dispatcher.dart:447:5)
#271    _drawFrame (dart:ui/hooks.dart:395:31)

16:06:35.708384 ERROR [widgets library] Null check operator used on a null value

Null check operator used on a null value

#0      _TrainingDayItemState.build (package:testapp/features/calendar_page/presentation/widgets/day_details/training_day_item.dart:56:43)
#1      StatefulElement.build (package:flutter/src/widgets/framework.dart:5931:27)
#2      ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5817:15)
#3      StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#4      Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#5      StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#6      Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#7      SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#8      Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#9      SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#10     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#11     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#12     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#13     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#14     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#15     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#16     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#17     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#18     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#19     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#20     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#21     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#22     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#23     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#24     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#25     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#26     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#27     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#28     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#29     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#30     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#31     StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#32     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#33     SliverMultiBoxAdaptorElement.updateChild (package:flutter/src/widgets/sliver.dart:1086:37)
#34     SliverMultiBoxAdaptorElement.performRebuild.processElement (package:flutter/src/widgets/sliver.dart:979:35)
#35     Iterable.forEach (dart:core/iterable.dart:366:35)
#36     SliverMultiBoxAdaptorElement.performRebuild (package:flutter/src/widgets/sliver.dart:1032:24)
#37     SliverMultiBoxAdaptorElement.update (package:flutter/src/widgets/sliver.dart:955:7)
#38     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#39     Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#40     MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#41     _ViewportElement.update (package:flutter/src/widgets/viewport.dart:293:11)
#42     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#43     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#44     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#45     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#46     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#47     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#48     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#49     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#50     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#51     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#52     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#53     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#54     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#55     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#56     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#57     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#58     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#59     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#60     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#61     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#62     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#63     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#64     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#65     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#66     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#67     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#68     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#69     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#70     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#71     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#72     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#73     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#74     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#75     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#76     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#77     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#78     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#79     StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#80     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#81     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#82     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#83     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#84     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#85     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#86     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#87     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#88     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#89     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#90     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#91     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#92     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#93     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#94     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#95     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#96     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#97     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#98     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#99     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#100    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#101    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#102    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#103    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#104    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#105    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#106    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#107    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#108    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#109    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#110    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#111    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#112    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#113    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#114    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#115    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#116    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#117    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#118    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#119    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#120    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#121    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#122    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#123    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#124    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#125    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#126    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#127    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#128    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#129    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#130    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#131    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#132    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#133    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#134    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#135    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#136    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#137    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#138    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#139    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#140    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#141    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#142    Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#143    MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#144    _ViewportElement.update (package:flutter/src/widgets/viewport.dart:293:11)
#145    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#146    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#147    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#148    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#149    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#150    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#151    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#152    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#153    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#154    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#155    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#156    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#157    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#158    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#159    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#160    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#161    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#162    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#163    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#164    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#165    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#166    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#167    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#168    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#169    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#170    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#171    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#172    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#173    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#174    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#175    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#176    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#177    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#178    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#179    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#180    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#181    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#182    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#183    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#184    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#185    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#186    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#187    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#188    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#189    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#190    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#191    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#192    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#193    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#194    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#195    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#196    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#197    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#198    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#199    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#200    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#201    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#202    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#203    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#204    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#205    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#206    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#207    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#208    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#209    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#210    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#211    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#212    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#213    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#214    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#215    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#216    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#217    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#218    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#219    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#220    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#221    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#222    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#223    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#224    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#225    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#226    Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#227    MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#228    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#229    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#230    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#231    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#232    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#233    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#234    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#235    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#236    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#237    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#238    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#239    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#240    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#241    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#242    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#243    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#244    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#245    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#246    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#247    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#248    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#249    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#250    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#251    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#252    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#253    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#254    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#255    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#256    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#257    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#258    BuildScope._tryRebuild (package:flutter/src/widgets/framework.dart:2750:15)
#259    BuildScope._flushDirtyElements (package:flutter/src/widgets/framework.dart:2807:11)
#260    BuildOwner.buildScope (package:flutter/src/widgets/framework.dart:3111:18)
#261    WidgetsBinding.drawFrame (package:flutter/src/widgets/binding.dart:1571:21)
#262    RendererBinding._handlePersistentFrameCallback (package:flutter/src/rendering/binding.dart:509:5)
#263    SchedulerBinding._invokeFrameCallback (package:flutter/src/scheduler/binding.dart:1430:15)
#264    SchedulerBinding.handleDrawFrame (package:flutter/src/scheduler/binding.dart:1345:9)
#265    SchedulerBinding._handleDrawFrame (package:flutter/src/scheduler/binding.dart:1198:5)
#266    _rootRun (dart:async/zone_root.dart:35:13)
#267    _CustomZone.run (dart:async/zone.dart:726:19)
#268    _CustomZone.runGuarded (dart:async/zone.dart:625:7)
#269    _invoke (dart:ui/hooks.dart:425:10)
#270    PlatformDispatcher._drawFrame (dart:ui/platform_dispatcher.dart:447:5)
#271    _drawFrame (dart:ui/hooks.dart:395:31)

16:06:35.741827 ERROR [widgets library] Null check operator used on a null value

Null check operator used on a null value

#0      _TrainingDayItemState.build (package:testapp/features/calendar_page/presentation/widgets/day_details/training_day_item.dart:56:43)
#1      StatefulElement.build (package:flutter/src/widgets/framework.dart:5931:27)
#2      ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5817:15)
#3      StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#4      Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#5      StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#6      Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#7      SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#8      Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#9      SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#10     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#11     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#12     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#13     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#14     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#15     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#16     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#17     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#18     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#19     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#20     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#21     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#22     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#23     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#24     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#25     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#26     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#27     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#28     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#29     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#30     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#31     StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#32     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#33     SliverMultiBoxAdaptorElement.updateChild (package:flutter/src/widgets/sliver.dart:1086:37)
#34     SliverMultiBoxAdaptorElement.performRebuild.processElement (package:flutter/src/widgets/sliver.dart:979:35)
#35     Iterable.forEach (dart:core/iterable.dart:366:35)
#36     SliverMultiBoxAdaptorElement.performRebuild (package:flutter/src/widgets/sliver.dart:1032:24)
#37     SliverMultiBoxAdaptorElement.update (package:flutter/src/widgets/sliver.dart:955:7)
#38     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#39     Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#40     MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#41     _ViewportElement.update (package:flutter/src/widgets/viewport.dart:293:11)
#42     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#43     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#44     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#45     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#46     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#47     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#48     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#49     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#50     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#51     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#52     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#53     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#54     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#55     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#56     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#57     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#58     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#59     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#60     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#61     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#62     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#63     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#64     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#65     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#66     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#67     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#68     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#69     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#70     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#71     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#72     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#73     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#74     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#75     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#76     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#77     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#78     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#79     StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#80     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#81     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#82     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#83     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#84     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#85     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#86     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#87     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#88     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#89     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#90     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#91     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#92     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#93     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#94     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#95     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#96     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#97     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#98     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#99     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#100    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#101    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#102    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#103    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#104    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#105    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#106    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#107    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#108    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#109    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#110    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#111    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#112    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#113    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#114    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#115    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#116    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#117    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#118    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#119    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#120    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#121    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#122    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#123    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#124    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#125    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#126    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#127    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#128    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#129    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#130    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#131    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#132    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#133    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#134    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#135    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#136    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#137    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#138    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#139    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#140    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#141    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#142    Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#143    MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#144    _ViewportElement.update (package:flutter/src/widgets/viewport.dart:293:11)
#145    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#146    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#147    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#148    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#149    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#150    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#151    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#152    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#153    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#154    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#155    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#156    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#157    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#158    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#159    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#160    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#161    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#162    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#163    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#164    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#165    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#166    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#167    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#168    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#169    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#170    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#171    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#172    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#173    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#174    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#175    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#176    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#177    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#178    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#179    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#180    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#181    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#182    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#183    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#184    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#185    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#186    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#187    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#188    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#189    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#190    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#191    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#192    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#193    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#194    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#195    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#196    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#197    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#198    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#199    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#200    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#201    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#202    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#203    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#204    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#205    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#206    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#207    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#208    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#209    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#210    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#211    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#212    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#213    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#214    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#215    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#216    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#217    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#218    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#219    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#220    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#221    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#222    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#223    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#224    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#225    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#226    Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#227    MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#228    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#229    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#230    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#231    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#232    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#233    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#234    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#235    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#236    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#237    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#238    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#239    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#240    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#241    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#242    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#243    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#244    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#245    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#246    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#247    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#248    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#249    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#250    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#251    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#252    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#253    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#254    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#255    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#256    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#257    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#258    BuildScope._tryRebuild (package:flutter/src/widgets/framework.dart:2750:15)
#259    BuildScope._flushDirtyElements (package:flutter/src/widgets/framework.dart:2807:11)
#260    BuildOwner.buildScope (package:flutter/src/widgets/framework.dart:3111:18)
#261    WidgetsBinding.drawFrame (package:flutter/src/widgets/binding.dart:1571:21)
#262    RendererBinding._handlePersistentFrameCallback (package:flutter/src/rendering/binding.dart:509:5)
#263    SchedulerBinding._invokeFrameCallback (package:flutter/src/scheduler/binding.dart:1430:15)
#264    SchedulerBinding.handleDrawFrame (package:flutter/src/scheduler/binding.dart:1345:9)
#265    SchedulerBinding._handleDrawFrame (package:flutter/src/scheduler/binding.dart:1198:5)
#266    _rootRun (dart:async/zone_root.dart:35:13)
#267    _CustomZone.run (dart:async/zone.dart:726:19)
#268    _CustomZone.runGuarded (dart:async/zone.dart:625:7)
#269    _invoke (dart:ui/hooks.dart:425:10)
#270    PlatformDispatcher._drawFrame (dart:ui/platform_dispatcher.dart:447:5)
#271    _drawFrame (dart:ui/hooks.dart:395:31)

16:06:35.576355 ERROR [widgets library] Null check operator used on a null value

Null check operator used on a null value

#0      _TrainingDayItemState.build (package:testapp/features/calendar_page/presentation/widgets/day_details/training_day_item.dart:56:43)
#1      StatefulElement.build (package:flutter/src/widgets/framework.dart:5931:27)
#2      ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5817:15)
#3      StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#4      Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#5      StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#6      Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#7      SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#8      Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#9      SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#10     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#11     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#12     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#13     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#14     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#15     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#16     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#17     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#18     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#19     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#20     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#21     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#22     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#23     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#24     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#25     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#26     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#27     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#28     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#29     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#30     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#31     StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#32     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#33     SliverMultiBoxAdaptorElement.updateChild (package:flutter/src/widgets/sliver.dart:1086:37)
#34     SliverMultiBoxAdaptorElement.performRebuild.processElement (package:flutter/src/widgets/sliver.dart:979:35)
#35     Iterable.forEach (dart:core/iterable.dart:366:35)
#36     SliverMultiBoxAdaptorElement.performRebuild (package:flutter/src/widgets/sliver.dart:1032:24)
#37     SliverMultiBoxAdaptorElement.update (package:flutter/src/widgets/sliver.dart:955:7)
#38     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#39     Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#40     MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#41     _ViewportElement.update (package:flutter/src/widgets/viewport.dart:293:11)
#42     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#43     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#44     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#45     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#46     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#47     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#48     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#49     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#50     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#51     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#52     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#53     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#54     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#55     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#56     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#57     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#58     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#59     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#60     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#61     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#62     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#63     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#64     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#65     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#66     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#67     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#68     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#69     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#70     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#71     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#72     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#73     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#74     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#75     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#76     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#77     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#78     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#79     StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#80     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#81     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#82     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#83     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#84     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#85     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#86     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#87     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#88     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#89     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#90     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#91     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#92     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#93     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#94     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#95     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#96     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#97     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#98     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#99     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#100    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#101    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#102    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#103    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#104    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#105    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#106    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#107    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#108    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#109    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#110    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#111    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#112    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#113    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#114    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#115    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#116    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#117    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#118    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#119    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#120    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#121    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#122    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#123    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#124    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#125    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#126    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#127    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#128    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#129    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#130    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#131    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#132    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#133    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#134    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#135    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#136    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#137    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#138    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#139    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#140    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#141    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#142    Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#143    MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#144    _ViewportElement.update (package:flutter/src/widgets/viewport.dart:293:11)
#145    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#146    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#147    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#148    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#149    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#150    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#151    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#152    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#153    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#154    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#155    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#156    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#157    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#158    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#159    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#160    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#161    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#162    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#163    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#164    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#165    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#166    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#167    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#168    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#169    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#170    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#171    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#172    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#173    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#174    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#175    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#176    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#177    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#178    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#179    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#180    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#181    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#182    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#183    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#184    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#185    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#186    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#187    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#188    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#189    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#190    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#191    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#192    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#193    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#194    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#195    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#196    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#197    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#198    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#199    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#200    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#201    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#202    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#203    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#204    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#205    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#206    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#207    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#208    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#209    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#210    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#211    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#212    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#213    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#214    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#215    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#216    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#217    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#218    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#219    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#220    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#221    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#222    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#223    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#224    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#225    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#226    Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#227    MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#228    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#229    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#230    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#231    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#232    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#233    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#234    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#235    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#236    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#237    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#238    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#239    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#240    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#241    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#242    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#243    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#244    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#245    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#246    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#247    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#248    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#249    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#250    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#251    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#252    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#253    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#254    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#255    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#256    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#257    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#258    BuildScope._tryRebuild (package:flutter/src/widgets/framework.dart:2750:15)
#259    BuildScope._flushDirtyElements (package:flutter/src/widgets/framework.dart:2807:11)
#260    BuildOwner.buildScope (package:flutter/src/widgets/framework.dart:3111:18)
#261    WidgetsBinding.drawFrame (package:flutter/src/widgets/binding.dart:1571:21)
#262    RendererBinding._handlePersistentFrameCallback (package:flutter/src/rendering/binding.dart:509:5)
#263    SchedulerBinding._invokeFrameCallback (package:flutter/src/scheduler/binding.dart:1430:15)
#264    SchedulerBinding.handleDrawFrame (package:flutter/src/scheduler/binding.dart:1345:9)
#265    SchedulerBinding._handleDrawFrame (package:flutter/src/scheduler/binding.dart:1198:5)
#266    _rootRun (dart:async/zone_root.dart:35:13)
#267    _CustomZone.run (dart:async/zone.dart:726:19)
#268    _CustomZone.runGuarded (dart:async/zone.dart:625:7)
#269    _invoke (dart:ui/hooks.dart:425:10)
#270    PlatformDispatcher._drawFrame (dart:ui/platform_dispatcher.dart:447:5)
#271    _drawFrame (dart:ui/hooks.dart:395:31)

16:06:35.607614 ERROR [widgets library] Null check operator used on a null value

Null check operator used on a null value

#0      _TrainingDayItemState.build (package:testapp/features/calendar_page/presentation/widgets/day_details/training_day_item.dart:56:43)
#1      StatefulElement.build (package:flutter/src/widgets/framework.dart:5931:27)
#2      ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5817:15)
#3      StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#4      Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#5      StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#6      Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#7      SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#8      Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#9      SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#10     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#11     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#12     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#13     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#14     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#15     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#16     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#17     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#18     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#19     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#20     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#21     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#22     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#23     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#24     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#25     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#26     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#27     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#28     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#29     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#30     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#31     StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#32     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#33     SliverMultiBoxAdaptorElement.updateChild (package:flutter/src/widgets/sliver.dart:1086:37)
#34     SliverMultiBoxAdaptorElement.performRebuild.processElement (package:flutter/src/widgets/sliver.dart:979:35)
#35     Iterable.forEach (dart:core/iterable.dart:366:35)
#36     SliverMultiBoxAdaptorElement.performRebuild (package:flutter/src/widgets/sliver.dart:1032:24)
#37     SliverMultiBoxAdaptorElement.update (package:flutter/src/widgets/sliver.dart:955:7)
#38     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#39     Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#40     MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#41     _ViewportElement.update (package:flutter/src/widgets/viewport.dart:293:11)
#42     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#43     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#44     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#45     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#46     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#47     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#48     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#49     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#50     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#51     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#52     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#53     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#54     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#55     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#56     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#57     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#58     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#59     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#60     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#61     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#62     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#63     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#64     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#65     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#66     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#67     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#68     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#69     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#70     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#71     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#72     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#73     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#74     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#75     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#76     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#77     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#78     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#79     StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#80     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#81     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#82     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#83     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#84     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#85     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#86     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#87     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#88     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#89     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#90     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#91     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#92     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#93     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#94     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#95     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#96     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#97     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#98     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#99     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#100    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#101    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#102    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#103    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#104    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#105    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#106    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#107    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#108    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#109    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#110    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#111    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#112    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#113    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#114    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#115    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#116    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#117    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#118    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#119    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#120    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#121    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#122    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#123    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#124    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#125    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#126    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#127    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#128    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#129    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#130    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#131    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#132    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#133    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#134    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#135    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#136    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#137    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#138    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#139    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#140    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#141    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#142    Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#143    MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#144    _ViewportElement.update (package:flutter/src/widgets/viewport.dart:293:11)
#145    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#146    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#147    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#148    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#149    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#150    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#151    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#152    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#153    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#154    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#155    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#156    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#157    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#158    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#159    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#160    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#161    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#162    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#163    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#164    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#165    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#166    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#167    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#168    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#169    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#170    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#171    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#172    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#173    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#174    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#175    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#176    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#177    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#178    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#179    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#180    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#181    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#182    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#183    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#184    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#185    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#186    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#187    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#188    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#189    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#190    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#191    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#192    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#193    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#194    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#195    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#196    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#197    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#198    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#199    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#200    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#201    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#202    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#203    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#204    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#205    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#206    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#207    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#208    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#209    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#210    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#211    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#212    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#213    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#214    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#215    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#216    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#217    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#218    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#219    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#220    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#221    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#222    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#223    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#224    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#225    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#226    Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#227    MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#228    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#229    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#230    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#231    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#232    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#233    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#234    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#235    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#236    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#237    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#238    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#239    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#240    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#241    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#242    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#243    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#244    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#245    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#246    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#247    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#248    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#249    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#250    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#251    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#252    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#253    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#254    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#255    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#256    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#257    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#258    BuildScope._tryRebuild (package:flutter/src/widgets/framework.dart:2750:15)
#259    BuildScope._flushDirtyElements (package:flutter/src/widgets/framework.dart:2807:11)
#260    BuildOwner.buildScope (package:flutter/src/widgets/framework.dart:3111:18)
#261    WidgetsBinding.drawFrame (package:flutter/src/widgets/binding.dart:1571:21)
#262    RendererBinding._handlePersistentFrameCallback (package:flutter/src/rendering/binding.dart:509:5)
#263    SchedulerBinding._invokeFrameCallback (package:flutter/src/scheduler/binding.dart:1430:15)
#264    SchedulerBinding.handleDrawFrame (package:flutter/src/scheduler/binding.dart:1345:9)
#265    SchedulerBinding._handleDrawFrame (package:flutter/src/scheduler/binding.dart:1198:5)
#266    _rootRun (dart:async/zone_root.dart:35:13)
#267    _CustomZone.run (dart:async/zone.dart:726:19)
#268    _CustomZone.runGuarded (dart:async/zone.dart:625:7)
#269    _invoke (dart:ui/hooks.dart:425:10)
#270    PlatformDispatcher._drawFrame (dart:ui/platform_dispatcher.dart:447:5)
#271    _drawFrame (dart:ui/hooks.dart:395:31)

16:06:35.642115 ERROR [widgets library] Null check operator used on a null value

Null check operator used on a null value

#0      _TrainingDayItemState.build (package:testapp/features/calendar_page/presentation/widgets/day_details/training_day_item.dart:56:43)
#1      StatefulElement.build (package:flutter/src/widgets/framework.dart:5931:27)
#2      ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5817:15)
#3      StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#4      Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#5      StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#6      Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#7      SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#8      Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#9      SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#10     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#11     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#12     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#13     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#14     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#15     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#16     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#17     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#18     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#19     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#20     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#21     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#22     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#23     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#24     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#25     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#26     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#27     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#28     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#29     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#30     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#31     StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#32     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#33     SliverMultiBoxAdaptorElement.updateChild (package:flutter/src/widgets/sliver.dart:1086:37)
#34     SliverMultiBoxAdaptorElement.performRebuild.processElement (package:flutter/src/widgets/sliver.dart:979:35)
#35     Iterable.forEach (dart:core/iterable.dart:366:35)
#36     SliverMultiBoxAdaptorElement.performRebuild (package:flutter/src/widgets/sliver.dart:1032:24)
#37     SliverMultiBoxAdaptorElement.update (package:flutter/src/widgets/sliver.dart:955:7)
#38     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#39     Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#40     MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#41     _ViewportElement.update (package:flutter/src/widgets/viewport.dart:293:11)
#42     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#43     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#44     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#45     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#46     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#47     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#48     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#49     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#50     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#51     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#52     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#53     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#54     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#55     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#56     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#57     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#58     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#59     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#60     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#61     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#62     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#63     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#64     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#65     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#66     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#67     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#68     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#69     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#70     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#71     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#72     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#73     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#74     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#75     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#76     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#77     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#78     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#79     StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#80     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#81     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#82     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#83     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#84     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#85     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#86     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#87     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#88     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#89     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#90     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#91     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#92     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#93     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#94     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#95     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#96     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#97     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#98     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#99     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#100    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#101    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#102    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#103    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#104    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#105    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#106    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#107    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#108    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#109    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#110    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#111    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#112    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#113    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#114    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#115    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#116    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#117    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#118    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#119    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#120    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#121    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#122    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#123    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#124    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#125    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#126    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#127    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#128    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#129    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#130    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#131    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#132    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#133    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#134    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#135    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#136    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#137    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#138    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#139    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#140    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#141    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#142    Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#143    MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#144    _ViewportElement.update (package:flutter/src/widgets/viewport.dart:293:11)
#145    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#146    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#147    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#148    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#149    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#150    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#151    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#152    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#153    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#154    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#155    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#156    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#157    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#158    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#159    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#160    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#161    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#162    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#163    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#164    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#165    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#166    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#167    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#168    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#169    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#170    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#171    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#172    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#173    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#174    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#175    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#176    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#177    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#178    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#179    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#180    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#181    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#182    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#183    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#184    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#185    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#186    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#187    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#188    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#189    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#190    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#191    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#192    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#193    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#194    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#195    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#196    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#197    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#198    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#199    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#200    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#201    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#202    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#203    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#204    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#205    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#206    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#207    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#208    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#209    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#210    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#211    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#212    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#213    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#214    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#215    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#216    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#217    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#218    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#219    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#220    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#221    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#222    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#223    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#224    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#225    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#226    Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#227    MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#228    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#229    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#230    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#231    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#232    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#233    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#234    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#235    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#236    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#237    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#238    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#239    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#240    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#241    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#242    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#243    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#244    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#245    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#246    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#247    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#248    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#249    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#250    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#251    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#252    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#253    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#254    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#255    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#256    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#257    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#258    BuildScope._tryRebuild (package:flutter/src/widgets/framework.dart:2750:15)
#259    BuildScope._flushDirtyElements (package:flutter/src/widgets/framework.dart:2807:11)
#260    BuildOwner.buildScope (package:flutter/src/widgets/framework.dart:3111:18)
#261    WidgetsBinding.drawFrame (package:flutter/src/widgets/binding.dart:1571:21)
#262    RendererBinding._handlePersistentFrameCallback (package:flutter/src/rendering/binding.dart:509:5)
#263    SchedulerBinding._invokeFrameCallback (package:flutter/src/scheduler/binding.dart:1430:15)
#264    SchedulerBinding.handleDrawFrame (package:flutter/src/scheduler/binding.dart:1345:9)
#265    SchedulerBinding._handleDrawFrame (package:flutter/src/scheduler/binding.dart:1198:5)
#266    _rootRun (dart:async/zone_root.dart:35:13)
#267    _CustomZone.run (dart:async/zone.dart:726:19)
#268    _CustomZone.runGuarded (dart:async/zone.dart:625:7)
#269    _invoke (dart:ui/hooks.dart:425:10)
#270    PlatformDispatcher._drawFrame (dart:ui/platform_dispatcher.dart:447:5)
#271    _drawFrame (dart:ui/hooks.dart:395:31)

16:06:43.359580 ERROR [widgets library] Null check operator used on a null value

Null check operator used on a null value

#0      _TrainingDayItemState.build (package:testapp/features/calendar_page/presentation/widgets/day_details/training_day_item.dart:56:43)
#1      StatefulElement.build (package:flutter/src/widgets/framework.dart:5931:27)
#2      ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5817:15)
#3      StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#4      Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#5      StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#6      Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#7      SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#8      Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#9      SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#10     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#11     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#12     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#13     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#14     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#15     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#16     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#17     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#18     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#19     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#20     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#21     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#22     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#23     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#24     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#25     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#26     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#27     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#28     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#29     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#30     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#31     StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#32     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#33     SliverMultiBoxAdaptorElement.updateChild (package:flutter/src/widgets/sliver.dart:1086:37)
#34     SliverMultiBoxAdaptorElement.performRebuild.processElement (package:flutter/src/widgets/sliver.dart:979:35)
#35     Iterable.forEach (dart:core/iterable.dart:366:35)
#36     SliverMultiBoxAdaptorElement.performRebuild (package:flutter/src/widgets/sliver.dart:1032:24)
#37     SliverMultiBoxAdaptorElement.update (package:flutter/src/widgets/sliver.dart:955:7)
#38     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#39     Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#40     MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#41     _ViewportElement.update (package:flutter/src/widgets/viewport.dart:293:11)
#42     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#43     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#44     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#45     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#46     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#47     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#48     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#49     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#50     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#51     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#52     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#53     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#54     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#55     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#56     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#57     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#58     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#59     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#60     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#61     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#62     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#63     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#64     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#65     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#66     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#67     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#68     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#69     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#70     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#71     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#72     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#73     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#74     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#75     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#76     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#77     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#78     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#79     StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#80     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#81     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#82     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#83     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#84     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#85     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#86     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#87     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#88     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#89     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#90     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#91     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#92     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#93     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#94     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#95     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#96     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#97     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#98     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#99     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#100    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#101    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#102    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#103    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#104    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#105    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#106    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#107    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#108    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#109    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#110    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#111    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#112    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#113    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#114    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#115    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#116    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#117    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#118    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#119    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#120    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#121    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#122    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#123    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#124    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#125    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#126    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#127    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#128    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#129    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#130    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#131    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#132    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#133    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#134    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#135    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#136    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#137    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#138    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#139    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#140    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#141    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#142    Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#143    MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#144    _ViewportElement.update (package:flutter/src/widgets/viewport.dart:293:11)
#145    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#146    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#147    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#148    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#149    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#150    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#151    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#152    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#153    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#154    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#155    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#156    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#157    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#158    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#159    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#160    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#161    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#162    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#163    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#164    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#165    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#166    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#167    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#168    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#169    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#170    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#171    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#172    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#173    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#174    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#175    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#176    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#177    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#178    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#179    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#180    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#181    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#182    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#183    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#184    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#185    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#186    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#187    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#188    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#189    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#190    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#191    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#192    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#193    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#194    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#195    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#196    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#197    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#198    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#199    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#200    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#201    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#202    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#203    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#204    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#205    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#206    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#207    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#208    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#209    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#210    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#211    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#212    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#213    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#214    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#215    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#216    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#217    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#218    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#219    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#220    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#221    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#222    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#223    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#224    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#225    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#226    Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#227    MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#228    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#229    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#230    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#231    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#232    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#233    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#234    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#235    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#236    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#237    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#238    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#239    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#240    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#241    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#242    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#243    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#244    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#245    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#246    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#247    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#248    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#249    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#250    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#251    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#252    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#253    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#254    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#255    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#256    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#257    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#258    BuildScope._tryRebuild (package:flutter/src/widgets/framework.dart:2750:15)
#259    BuildScope._flushDirtyElements (package:flutter/src/widgets/framework.dart:2807:11)
#260    BuildOwner.buildScope (package:flutter/src/widgets/framework.dart:3111:18)
#261    WidgetsBinding.drawFrame (package:flutter/src/widgets/binding.dart:1571:21)
#262    RendererBinding._handlePersistentFrameCallback (package:flutter/src/rendering/binding.dart:509:5)
#263    SchedulerBinding._invokeFrameCallback (package:flutter/src/scheduler/binding.dart:1430:15)
#264    SchedulerBinding.handleDrawFrame (package:flutter/src/scheduler/binding.dart:1345:9)
#265    SchedulerBinding._handleDrawFrame (package:flutter/src/scheduler/binding.dart:1198:5)
#266    _rootRun (dart:async/zone_root.dart:35:13)
#267    _CustomZone.run (dart:async/zone.dart:726:19)
#268    _CustomZone.runGuarded (dart:async/zone.dart:625:7)
#269    _invoke (dart:ui/hooks.dart:425:10)
#270    PlatformDispatcher._drawFrame (dart:ui/platform_dispatcher.dart:447:5)
#271    _drawFrame (dart:ui/hooks.dart:395:31)

16:06:44.308944 ERROR [widgets library] Null check operator used on a null value

Null check operator used on a null value

#0      _TrainingDayItemState.build (package:testapp/features/calendar_page/presentation/widgets/day_details/training_day_item.dart:56:43)
#1      StatefulElement.build (package:flutter/src/widgets/framework.dart:5931:27)
#2      ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5817:15)
#3      StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#4      Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#5      StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#6      Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#7      SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#8      Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#9      SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#10     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#11     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#12     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#13     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#14     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#15     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#16     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#17     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#18     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#19     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#20     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#21     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#22     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#23     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#24     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#25     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#26     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#27     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#28     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#29     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#30     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#31     StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#32     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#33     SliverMultiBoxAdaptorElement.updateChild (package:flutter/src/widgets/sliver.dart:1086:37)
#34     SliverMultiBoxAdaptorElement.performRebuild.processElement (package:flutter/src/widgets/sliver.dart:979:35)
#35     Iterable.forEach (dart:core/iterable.dart:366:35)
#36     SliverMultiBoxAdaptorElement.performRebuild (package:flutter/src/widgets/sliver.dart:1032:24)
#37     SliverMultiBoxAdaptorElement.update (package:flutter/src/widgets/sliver.dart:955:7)
#38     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#39     Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#40     MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#41     _ViewportElement.update (package:flutter/src/widgets/viewport.dart:293:11)
#42     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#43     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#44     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#45     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#46     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#47     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#48     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#49     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#50     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#51     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#52     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#53     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#54     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#55     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#56     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#57     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#58     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#59     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#60     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#61     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#62     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#63     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#64     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#65     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#66     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#67     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#68     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#69     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#70     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#71     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#72     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#73     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#74     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#75     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#76     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#77     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#78     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#79     StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#80     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#81     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#82     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#83     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#84     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#85     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#86     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#87     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#88     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#89     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#90     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#91     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#92     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#93     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#94     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#95     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#96     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#97     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#98     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#99     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#100    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#101    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#102    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#103    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#104    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#105    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#106    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#107    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#108    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#109    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#110    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#111    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#112    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#113    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#114    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#115    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#116    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#117    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#118    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#119    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#120    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#121    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#122    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#123    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#124    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#125    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#126    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#127    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#128    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#129    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#130    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#131    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#132    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#133    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#134    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#135    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#136    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#137    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#138    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#139    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#140    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#141    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#142    Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#143    MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#144    _ViewportElement.update (package:flutter/src/widgets/viewport.dart:293:11)
#145    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#146    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#147    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#148    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#149    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#150    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#151    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#152    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#153    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#154    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#155    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#156    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#157    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#158    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#159    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#160    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#161    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#162    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#163    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#164    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#165    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#166    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#167    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#168    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#169    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#170    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#171    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#172    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#173    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#174    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#175    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#176    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#177    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#178    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#179    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#180    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#181    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#182    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#183    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#184    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#185    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#186    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#187    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#188    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#189    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#190    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#191    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#192    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#193    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#194    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#195    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#196    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#197    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#198    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#199    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#200    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#201    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#202    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#203    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#204    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#205    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#206    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#207    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#208    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#209    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#210    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#211    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#212    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#213    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#214    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#215    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#216    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#217    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#218    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#219    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#220    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#221    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#222    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#223    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#224    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#225    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#226    Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#227    MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#228    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#229    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#230    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#231    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#232    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#233    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#234    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#235    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#236    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#237    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#238    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#239    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#240    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#241    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#242    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#243    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#244    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#245    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#246    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#247    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#248    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#249    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#250    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#251    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#252    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#253    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#254    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#255    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#256    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#257    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#258    BuildScope._tryRebuild (package:flutter/src/widgets/framework.dart:2750:15)
#259    BuildScope._flushDirtyElements (package:flutter/src/widgets/framework.dart:2807:11)
#260    BuildOwner.buildScope (package:flutter/src/widgets/framework.dart:3111:18)
#261    WidgetsBinding.drawFrame (package:flutter/src/widgets/binding.dart:1571:21)
#262    RendererBinding._handlePersistentFrameCallback (package:flutter/src/rendering/binding.dart:509:5)
#263    SchedulerBinding._invokeFrameCallback (package:flutter/src/scheduler/binding.dart:1430:15)
#264    SchedulerBinding.handleDrawFrame (package:flutter/src/scheduler/binding.dart:1345:9)
#265    SchedulerBinding._handleDrawFrame (package:flutter/src/scheduler/binding.dart:1198:5)
#266    _rootRun (dart:async/zone_root.dart:35:13)
#267    _CustomZone.run (dart:async/zone.dart:726:19)
#268    _CustomZone.runGuarded (dart:async/zone.dart:625:7)
#269    _invoke (dart:ui/hooks.dart:425:10)
#270    PlatformDispatcher._drawFrame (dart:ui/platform_dispatcher.dart:447:5)
#271    _drawFrame (dart:ui/hooks.dart:395:31)

16:06:45.310213 ERROR [widgets library] Null check operator used on a null value

Null check operator used on a null value

#0      _TrainingDayItemState.build (package:testapp/features/calendar_page/presentation/widgets/day_details/training_day_item.dart:56:43)
#1      StatefulElement.build (package:flutter/src/widgets/framework.dart:5931:27)
#2      ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5817:15)
#3      StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#4      Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#5      StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#6      Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#7      SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#8      Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#9      SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#10     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#11     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#12     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#13     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#14     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#15     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#16     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#17     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#18     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#19     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#20     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#21     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#22     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#23     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#24     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#25     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#26     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#27     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#28     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#29     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#30     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#31     StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#32     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#33     SliverMultiBoxAdaptorElement.updateChild (package:flutter/src/widgets/sliver.dart:1086:37)
#34     SliverMultiBoxAdaptorElement.performRebuild.processElement (package:flutter/src/widgets/sliver.dart:979:35)
#35     Iterable.forEach (dart:core/iterable.dart:366:35)
#36     SliverMultiBoxAdaptorElement.performRebuild (package:flutter/src/widgets/sliver.dart:1032:24)
#37     SliverMultiBoxAdaptorElement.update (package:flutter/src/widgets/sliver.dart:955:7)
#38     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#39     Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#40     MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#41     _ViewportElement.update (package:flutter/src/widgets/viewport.dart:293:11)
#42     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#43     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#44     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#45     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#46     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#47     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#48     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#49     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#50     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#51     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#52     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#53     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#54     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#55     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#56     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#57     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#58     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#59     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#60     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#61     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#62     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#63     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#64     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#65     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#66     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#67     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#68     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#69     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#70     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#71     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#72     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#73     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#74     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#75     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#76     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#77     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#78     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#79     StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#80     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#81     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#82     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#83     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#84     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#85     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#86     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#87     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#88     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#89     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#90     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#91     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#92     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#93     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#94     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#95     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#96     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#97     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#98     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#99     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#100    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#101    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#102    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#103    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#104    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#105    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#106    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#107    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#108    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#109    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#110    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#111    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#112    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#113    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#114    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#115    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#116    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#117    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#118    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#119    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#120    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#121    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#122    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#123    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#124    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#125    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#126    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#127    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#128    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#129    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#130    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#131    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#132    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#133    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#134    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#135    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#136    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#137    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#138    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#139    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#140    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#141    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#142    Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#143    MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#144    _ViewportElement.update (package:flutter/src/widgets/viewport.dart:293:11)
#145    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#146    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#147    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#148    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#149    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#150    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#151    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#152    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#153    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#154    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#155    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#156    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#157    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#158    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#159    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#160    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#161    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#162    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#163    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#164    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#165    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#166    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#167    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#168    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#169    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#170    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#171    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#172    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#173    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#174    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#175    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#176    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#177    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#178    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#179    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#180    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#181    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#182    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#183    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#184    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#185    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#186    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#187    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#188    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#189    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#190    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#191    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#192    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#193    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#194    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#195    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#196    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#197    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#198    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#199    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#200    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#201    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#202    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#203    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#204    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#205    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#206    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#207    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#208    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#209    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#210    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#211    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#212    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#213    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#214    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#215    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#216    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#217    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#218    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#219    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#220    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#221    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#222    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#223    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#224    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#225    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#226    Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#227    MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#228    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#229    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#230    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#231    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#232    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#233    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#234    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#235    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#236    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#237    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#238    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#239    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#240    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#241    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#242    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#243    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#244    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#245    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#246    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#247    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#248    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#249    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#250    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#251    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#252    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#253    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#254    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#255    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#256    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#257    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#258    BuildScope._tryRebuild (package:flutter/src/widgets/framework.dart:2750:15)
#259    BuildScope._flushDirtyElements (package:flutter/src/widgets/framework.dart:2807:11)
#260    BuildOwner.buildScope (package:flutter/src/widgets/framework.dart:3111:18)
#261    WidgetsBinding.drawFrame (package:flutter/src/widgets/binding.dart:1571:21)
#262    RendererBinding._handlePersistentFrameCallback (package:flutter/src/rendering/binding.dart:509:5)
#263    SchedulerBinding._invokeFrameCallback (package:flutter/src/scheduler/binding.dart:1430:15)
#264    SchedulerBinding.handleDrawFrame (package:flutter/src/scheduler/binding.dart:1345:9)
#265    SchedulerBinding._handleDrawFrame (package:flutter/src/scheduler/binding.dart:1198:5)
#266    _rootRun (dart:async/zone_root.dart:35:13)
#267    _CustomZone.run (dart:async/zone.dart:726:19)
#268    _CustomZone.runGuarded (dart:async/zone.dart:625:7)
#269    _invoke (dart:ui/hooks.dart:425:10)
#270    PlatformDispatcher._drawFrame (dart:ui/platform_dispatcher.dart:447:5)
#271    _drawFrame (dart:ui/hooks.dart:395:31)

16:06:45.339598 ERROR [widgets library] Null check operator used on a null value

Null check operator used on a null value

#0      _TrainingDayItemState.build (package:testapp/features/calendar_page/presentation/widgets/day_details/training_day_item.dart:56:43)
#1      StatefulElement.build (package:flutter/src/widgets/framework.dart:5931:27)
#2      ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5817:15)
#3      StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#4      Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#5      StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#6      Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#7      SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#8      Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#9      SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#10     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#11     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#12     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#13     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#14     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#15     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#16     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#17     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#18     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#19     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#20     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#21     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#22     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#23     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#24     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#25     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#26     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#27     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#28     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#29     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#30     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#31     StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#32     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#33     SliverMultiBoxAdaptorElement.updateChild (package:flutter/src/widgets/sliver.dart:1086:37)
#34     SliverMultiBoxAdaptorElement.performRebuild.processElement (package:flutter/src/widgets/sliver.dart:979:35)
#35     Iterable.forEach (dart:core/iterable.dart:366:35)
#36     SliverMultiBoxAdaptorElement.performRebuild (package:flutter/src/widgets/sliver.dart:1032:24)
#37     SliverMultiBoxAdaptorElement.update (package:flutter/src/widgets/sliver.dart:955:7)
#38     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#39     Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#40     MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#41     _ViewportElement.update (package:flutter/src/widgets/viewport.dart:293:11)
#42     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#43     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#44     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#45     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#46     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#47     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#48     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#49     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#50     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#51     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#52     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#53     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#54     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#55     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#56     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#57     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#58     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#59     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#60     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#61     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#62     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#63     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#64     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#65     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#66     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#67     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#68     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#69     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#70     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#71     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#72     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#73     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#74     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#75     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#76     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#77     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#78     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#79     StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#80     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#81     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#82     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#83     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#84     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#85     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#86     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#87     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#88     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#89     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#90     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#91     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#92     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#93     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#94     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#95     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#96     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#97     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#98     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#99     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#100    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#101    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#102    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#103    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#104    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#105    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#106    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#107    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#108    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#109    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#110    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#111    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#112    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#113    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#114    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#115    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#116    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#117    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#118    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#119    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#120    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#121    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#122    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#123    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#124    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#125    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#126    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#127    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#128    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#129    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#130    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#131    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#132    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#133    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#134    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#135    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#136    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#137    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#138    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#139    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#140    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#141    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#142    Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#143    MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#144    _ViewportElement.update (package:flutter/src/widgets/viewport.dart:293:11)
#145    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#146    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#147    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#148    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#149    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#150    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#151    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#152    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#153    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#154    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#155    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#156    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#157    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#158    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#159    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#160    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#161    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#162    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#163    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#164    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#165    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#166    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#167    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#168    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#169    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#170    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#171    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#172    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#173    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#174    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#175    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#176    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#177    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#178    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#179    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#180    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#181    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#182    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#183    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#184    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#185    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#186    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#187    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#188    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#189    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#190    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#191    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#192    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#193    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#194    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#195    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#196    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#197    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#198    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#199    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#200    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#201    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#202    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#203    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#204    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#205    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#206    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#207    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#208    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#209    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#210    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#211    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#212    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#213    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#214    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#215    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#216    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#217    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#218    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#219    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#220    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#221    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#222    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#223    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#224    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#225    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#226    Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#227    MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#228    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#229    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#230    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#231    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#232    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#233    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#234    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#235    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#236    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#237    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#238    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#239    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#240    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#241    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#242    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#243    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#244    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#245    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#246    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#247    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#248    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#249    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#250    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#251    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#252    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#253    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#254    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#255    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#256    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#257    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#258    BuildScope._tryRebuild (package:flutter/src/widgets/framework.dart:2750:15)
#259    BuildScope._flushDirtyElements (package:flutter/src/widgets/framework.dart:2807:11)
#260    BuildOwner.buildScope (package:flutter/src/widgets/framework.dart:3111:18)
#261    WidgetsBinding.drawFrame (package:flutter/src/widgets/binding.dart:1571:21)
#262    RendererBinding._handlePersistentFrameCallback (package:flutter/src/rendering/binding.dart:509:5)
#263    SchedulerBinding._invokeFrameCallback (package:flutter/src/scheduler/binding.dart:1430:15)
#264    SchedulerBinding.handleDrawFrame (package:flutter/src/scheduler/binding.dart:1345:9)
#265    SchedulerBinding._handleDrawFrame (package:flutter/src/scheduler/binding.dart:1198:5)
#266    _rootRun (dart:async/zone_root.dart:35:13)
#267    _CustomZone.run (dart:async/zone.dart:726:19)
#268    _CustomZone.runGuarded (dart:async/zone.dart:625:7)
#269    _invoke (dart:ui/hooks.dart:425:10)
#270    PlatformDispatcher._drawFrame (dart:ui/platform_dispatcher.dart:447:5)
#271    _drawFrame (dart:ui/hooks.dart:395:31)

16:06:45.380386 ERROR [widgets library] Null check operator used on a null value

Null check operator used on a null value

#0      _TrainingDayItemState.build (package:testapp/features/calendar_page/presentation/widgets/day_details/training_day_item.dart:56:43)
#1      StatefulElement.build (package:flutter/src/widgets/framework.dart:5931:27)
#2      ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5817:15)
#3      StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#4      Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#5      StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#6      Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#7      SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#8      Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#9      SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#10     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#11     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#12     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#13     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#14     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#15     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#16     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#17     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#18     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#19     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#20     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#21     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#22     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#23     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#24     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#25     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#26     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#27     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#28     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#29     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#30     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#31     StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#32     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#33     SliverMultiBoxAdaptorElement.updateChild (package:flutter/src/widgets/sliver.dart:1086:37)
#34     SliverMultiBoxAdaptorElement.performRebuild.processElement (package:flutter/src/widgets/sliver.dart:979:35)
#35     Iterable.forEach (dart:core/iterable.dart:366:35)
#36     SliverMultiBoxAdaptorElement.performRebuild (package:flutter/src/widgets/sliver.dart:1032:24)
#37     SliverMultiBoxAdaptorElement.update (package:flutter/src/widgets/sliver.dart:955:7)
#38     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#39     Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#40     MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#41     _ViewportElement.update (package:flutter/src/widgets/viewport.dart:293:11)
#42     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#43     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#44     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#45     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#46     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#47     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#48     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#49     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#50     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#51     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#52     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#53     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#54     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#55     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#56     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#57     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#58     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#59     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#60     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#61     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#62     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#63     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#64     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#65     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#66     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#67     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#68     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#69     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#70     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#71     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#72     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#73     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#74     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#75     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#76     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#77     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#78     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#79     StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#80     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#81     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#82     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#83     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#84     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#85     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#86     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#87     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#88     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#89     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#90     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#91     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#92     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#93     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#94     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#95     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#96     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#97     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#98     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#99     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#100    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#101    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#102    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#103    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#104    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#105    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#106    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#107    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#108    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#109    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#110    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#111    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#112    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#113    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#114    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#115    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#116    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#117    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#118    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#119    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#120    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#121    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#122    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#123    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#124    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#125    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#126    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#127    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#128    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#129    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#130    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#131    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#132    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#133    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#134    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#135    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#136    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#137    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#138    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#139    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#140    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#141    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#142    Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#143    MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#144    _ViewportElement.update (package:flutter/src/widgets/viewport.dart:293:11)
#145    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#146    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#147    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#148    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#149    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#150    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#151    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#152    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#153    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#154    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#155    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#156    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#157    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#158    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#159    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#160    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#161    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#162    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#163    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#164    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#165    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#166    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
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#168    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#169    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#170    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#171    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#172    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#173    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#174    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#175    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#176    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#177    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#178    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#179    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#180    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#181    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#182    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#183    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#184    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#185    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
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#187    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#188    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#189    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#190    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#191    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#192    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#193    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#194    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#195    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#196    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#197    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#198    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#199    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#200    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#201    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#202    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#203    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#204    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
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#206    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#207    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#208    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#209    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#210    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#211    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#212    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#213    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#214    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#215    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#216    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#217    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#218    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#219    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#220    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#221    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#222    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#223    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#224    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#225    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#226    Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#227    MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#228    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#229    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#230    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#231    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#232    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#233    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#234    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#235    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#236    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#237    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#238    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#239    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#240    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#241    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#242    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#243    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#244    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#245    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#246    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#247    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#248    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#249    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#250    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#251    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#252    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#253    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#254    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#255    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#256    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#257    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#258    BuildScope._tryRebuild (package:flutter/src/widgets/framework.dart:2750:15)
#259    BuildScope._flushDirtyElements (package:flutter/src/widgets/framework.dart:2807:11)
#260    BuildOwner.buildScope (package:flutter/src/widgets/framework.dart:3111:18)
#261    WidgetsBinding.drawFrame (package:flutter/src/widgets/binding.dart:1571:21)
#262    RendererBinding._handlePersistentFrameCallback (package:flutter/src/rendering/binding.dart:509:5)
#263    SchedulerBinding._invokeFrameCallback (package:flutter/src/scheduler/binding.dart:1430:15)
#264    SchedulerBinding.handleDrawFrame (package:flutter/src/scheduler/binding.dart:1345:9)
#265    SchedulerBinding._handleDrawFrame (package:flutter/src/scheduler/binding.dart:1198:5)
#266    _rootRun (dart:async/zone_root.dart:35:13)
#267    _CustomZone.run (dart:async/zone.dart:726:19)
#268    _CustomZone.runGuarded (dart:async/zone.dart:625:7)
#269    _invoke (dart:ui/hooks.dart:425:10)
#270    PlatformDispatcher._drawFrame (dart:ui/platform_dispatcher.dart:447:5)
#271    _drawFrame (dart:ui/hooks.dart:395:31)

16:07:07.814599 INFO [console] [ChatWebSocket] disconnected: closeCode=1002, closeReason=null

16:07:07.823915 INFO [console] [ChatWebSocket] reconnect scheduled in 1s (attempt=1)

16:07:11.590551 INFO [console] [ChatWebSocket] diagnostics=raw-pusher-2026-07-14-01; init url=wss://rehabilitation.most.team/app/local-reverb-key?protocol=7&client=flutter&version=1.0.0&flash=false, authEndpoint=https://rehabilitation.most.team/api/broadcasting/auth

16:07:11.999687 INFO [console] [ChatWebSocket] init completed: connected=false, socketId=null, pendingChannels={private-chat.121, private-user.324}

16:07:14.000221 INFO [console] [ChatWebSocket] diagnostics=raw-pusher-2026-07-14-01; init url=wss://rehabilitation.most.team/app/local-reverb-key?protocol=7&client=flutter&version=1.0.0&flash=false, authEndpoint=https://rehabilitation.most.team/api/broadcasting/auth

16:07:15.284115 ERROR [widgets library] Null check operator used on a null value

Null check operator used on a null value

#0      _TrainingDayItemState.build (package:testapp/features/calendar_page/presentation/widgets/day_details/training_day_item.dart:56:43)
#1      StatefulElement.build (package:flutter/src/widgets/framework.dart:5931:27)
#2      ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5817:15)
#3      StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#4      Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#5      StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#6      Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#7      SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#8      Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#9      SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#10     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#11     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#12     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#13     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#14     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#15     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#16     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#17     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#18     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#19     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#20     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#21     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#22     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#23     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#24     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#25     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#26     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#27     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#28     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#29     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#30     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#31     StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#32     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#33     SliverMultiBoxAdaptorElement.updateChild (package:flutter/src/widgets/sliver.dart:1086:37)
#34     SliverMultiBoxAdaptorElement.performRebuild.processElement (package:flutter/src/widgets/sliver.dart:979:35)
#35     Iterable.forEach (dart:core/iterable.dart:366:35)
#36     SliverMultiBoxAdaptorElement.performRebuild (package:flutter/src/widgets/sliver.dart:1032:24)
#37     SliverMultiBoxAdaptorElement.update (package:flutter/src/widgets/sliver.dart:955:7)
#38     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#39     Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#40     MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#41     _ViewportElement.update (package:flutter/src/widgets/viewport.dart:293:11)
#42     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#43     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#44     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#45     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#46     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#47     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#48     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#49     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#50     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#51     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#52     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#53     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#54     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#55     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#56     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#57     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#58     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#59     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#60     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#61     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#62     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#63     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#64     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#65     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#66     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#67     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#68     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#69     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#70     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#71     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#72     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#73     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#74     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#75     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#76     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#77     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#78     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#79     StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#80     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#81     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#82     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#83     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#84     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#85     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#86     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#87     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#88     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#89     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#90     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#91     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#92     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#93     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#94     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#95     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#96     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#97     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#98     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#99     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#100    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#101    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#102    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#103    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#104    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#105    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#106    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#107    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#108    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#109    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#110    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#111    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#112    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#113    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#114    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#115    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#116    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#117    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#118    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#119    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#120    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#121    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#122    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#123    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#124    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#125    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#126    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#127    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#128    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#129    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#130    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#131    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#132    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#133    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#134    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#135    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#136    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#137    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#138    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#139    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#140    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#141    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#142    Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#143    MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#144    _ViewportElement.update (package:flutter/src/widgets/viewport.dart:293:11)
#145    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#146    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#147    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#148    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#149    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#150    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#151    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#152    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#153    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#154    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#155    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#156    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#157    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#158    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#159    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#160    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#161    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#162    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#163    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#164    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#165    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#166    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#167    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#168    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#169    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#170    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#171    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#172    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#173    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#174    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#175    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#176    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#177    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#178    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#179    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#180    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#181    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#182    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#183    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#184    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#185    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#186    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#187    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#188    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#189    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#190    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#191    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#192    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#193    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#194    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#195    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#196    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#197    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#198    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#199    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#200    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#201    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#202    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#203    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#204    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#205    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#206    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#207    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#208    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#209    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#210    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#211    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#212    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#213    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#214    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#215    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#216    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#217    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#218    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#219    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#220    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#221    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#222    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#223    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#224    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#225    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#226    Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#227    MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#228    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#229    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#230    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#231    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#232    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#233    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#234    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#235    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#236    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#237    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#238    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#239    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#240    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#241    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#242    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#243    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#244    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#245    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#246    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#247    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#248    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#249    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#250    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#251    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#252    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#253    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#254    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#255    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#256    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#257    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#258    BuildScope._tryRebuild (package:flutter/src/widgets/framework.dart:2750:15)
#259    BuildScope._flushDirtyElements (package:flutter/src/widgets/framework.dart:2807:11)
#260    BuildOwner.buildScope (package:flutter/src/widgets/framework.dart:3111:18)
#261    WidgetsBinding.drawFrame (package:flutter/src/widgets/binding.dart:1571:21)
#262    RendererBinding._handlePersistentFrameCallback (package:flutter/src/rendering/binding.dart:509:5)
#263    SchedulerBinding._invokeFrameCallback (package:flutter/src/scheduler/binding.dart:1430:15)
#264    SchedulerBinding.handleDrawFrame (package:flutter/src/scheduler/binding.dart:1345:9)
#265    SchedulerBinding._handleDrawFrame (package:flutter/src/scheduler/binding.dart:1198:5)
#266    _rootRun (dart:async/zone_root.dart:35:13)
#267    _CustomZone.run (dart:async/zone.dart:726:19)
#268    _CustomZone.runGuarded (dart:async/zone.dart:625:7)
#269    _invoke (dart:ui/hooks.dart:425:10)
#270    PlatformDispatcher._drawFrame (dart:ui/platform_dispatcher.dart:447:5)
#271    _drawFrame (dart:ui/hooks.dart:395:31)

16:07:14.612432 INFO [console] [ChatWebSocket] incoming raw: type=String, data={"event":"pusher_internal:subscription_succeeded","data":"{}","channel":"private-user.324"}

16:07:14.612682 INFO [console] [ChatWebSocket] incoming envelope: event=pusher_internal:subscription_succeeded, channel=private-user.324, data={}

16:07:14.612796 INFO [console] [ChatWebSocket] subscription succeeded: private-user.324

16:07:14.516644 INFO [console] [DIO]

16:07:14.516969 INFO [console] [ChatWebSocket] auth response: status=200, data={auth: local-reverb-key:7f5058af3b546cc3e0e7cedcef8364ac55c337da3c40696e5fd22cc9a9ee4db6}

16:07:14.517072 INFO [console] [ChatWebSocket] subscribe send: {channel: private-user.324, auth: local-reverb-key:7f5058af3b546cc3e0e7cedcef8364ac55c337da3c40696e5fd22cc9a9ee4db6}

16:07:14.516377 INFO [console] [DIO] server: openresty

16:07:14.516463 INFO [console] [DIO] Response Text:

16:07:14.516567 INFO [console] [DIO] {"auth":"local-reverb-key:7f5058af3b546cc3e0e7cedcef8364ac55c337da3c40696e5fd22cc9a9ee4db6"}

16:07:14.516152 INFO [console] [DIO] transfer-encoding: chunked

16:07:14.516246 INFO [console] [DIO] access-control-allow-origin: http://localhost:3000

16:07:14.516299 INFO [console] [DIO] content-type: application/json

16:07:18.414328 ERROR [widgets library] Null check operator used on a null value

Null check operator used on a null value

#0      _TrainingDayItemState.build (package:testapp/features/calendar_page/presentation/widgets/day_details/training_day_item.dart:56:43)
#1      StatefulElement.build (package:flutter/src/widgets/framework.dart:5931:27)
#2      ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5817:15)
#3      StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#4      Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#5      StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#6      Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#7      SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#8      Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#9      SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#10     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#11     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#12     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#13     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#14     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#15     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#16     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#17     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#18     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#19     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#20     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#21     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#22     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#23     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#24     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#25     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#26     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#27     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#28     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#29     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#30     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#31     StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#32     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#33     SliverMultiBoxAdaptorElement.updateChild (package:flutter/src/widgets/sliver.dart:1086:37)
#34     SliverMultiBoxAdaptorElement.performRebuild.processElement (package:flutter/src/widgets/sliver.dart:979:35)
#35     Iterable.forEach (dart:core/iterable.dart:366:35)
#36     SliverMultiBoxAdaptorElement.performRebuild (package:flutter/src/widgets/sliver.dart:1032:24)
#37     SliverMultiBoxAdaptorElement.update (package:flutter/src/widgets/sliver.dart:955:7)
#38     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#39     Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#40     MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#41     _ViewportElement.update (package:flutter/src/widgets/viewport.dart:293:11)
#42     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#43     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#44     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#45     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#46     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#47     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#48     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#49     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#50     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#51     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#52     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#53     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#54     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#55     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#56     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#57     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#58     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#59     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#60     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#61     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#62     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#63     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#64     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#65     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#66     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#67     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#68     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#69     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#70     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#71     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#72     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#73     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#74     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#75     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#76     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#77     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#78     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#79     StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#80     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#81     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#82     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#83     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#84     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#85     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#86     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#87     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#88     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#89     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#90     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#91     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#92     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#93     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#94     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#95     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#96     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#97     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#98     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#99     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#100    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#101    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#102    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#103    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
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16:08:38.428649 INFO [console] [ChatWebSocket] diagnostics=raw-pusher-2026-07-14-01; init url=wss://rehabilitation.most.team/app/local-reverb-key?protocol=7&client=flutter&version=1.0.0&flash=false, authEndpoint=https://rehabilitation.most.team/api/broadcasting/auth

16:08:39.343012 INFO [console] [ChatWebSocket] init completed: connected=false, socketId=null, pendingChannels={private-chat.121, private-user.324}

16:08:41.343965 INFO [console] [ChatWebSocket] diagnostics=raw-pusher-2026-07-14-01; init url=wss://rehabilitation.most.team/app/local-reverb-key?protocol=7&client=flutter&version=1.0.0&flash=false, authEndpoint=https://rehabilitation.most.team/api/broadcasting/auth

16:08:41.344151 INFO [console] [ChatWebSocket] websocket connect started: url=wss://rehabilitation.most.team/app/local-reverb-key?protocol=7&client=flutter&version=1.0.0&flash=false

16:08:41.868972 INFO [console] [ChatWebSocket] websocket connect finished: readyState=1

16:08:41.869362 INFO [console] [ChatWebSocket] websocket listener attached

16:08:41.869501 INFO [console] [ChatWebSocket] init completed: connected=false, socketId=null, pendingChannels={private-chat.121, private-user.324}

16:08:41.869989 INFO [console] [ChatWebSocket] incoming raw: type=String, data={"event":"pusher:connection_established","data":"{\"socket_id\":\"18956522.371490353\",\"activity_timeout\":30}"}

16:08:41.870193 INFO [console] [ChatWebSocket] incoming envelope: event=pusher:connection_established, channel=null, data={"socket_id":"18956522.371490353","activity_timeout":30}

16:08:41.870353 INFO [console] [ChatWebSocket] connected: socketId=18956522.371490353, activityTimeout=30

16:08:41.870465 INFO [console] [ChatWebSocket] auth request: socketId=18956522.371490353, channel=private-chat.121

16:08:41.873327 INFO [console] [DIO] *** Request ***

16:08:41.873518 INFO [console] [DIO] uri: https://rehabilitation.most.team/api/broadcasting/auth

16:08:41.873619 INFO [console] [DIO] method: POST

16:08:41.873727 INFO [console] [DIO] responseType: ResponseType.json

16:08:41.873819 INFO [console] [DIO] followRedirects: true

16:08:41.873907 INFO [console] [DIO] persistentConnection: true

16:08:41.874006 INFO [console] [DIO] connectTimeout: 0:00:10.000000

16:08:41.874095 INFO [console] [DIO] sendTimeout: null

16:08:41.874204 INFO [console] [DIO] receiveTimeout: 0:00:10.000000

16:08:41.874285 INFO [console] [DIO] transformTimeout: null

16:08:41.874370 INFO [console] [DIO] receiveDataWhenStatusError: true

16:08:41.874471 INFO [console] [DIO] extra: {}

16:08:41.874573 INFO [console] [DIO] headers:

16:08:41.874686 INFO [console] [DIO] accept: application/json

16:08:41.874772 INFO [console] [DIO] content-type: application/x-www-form-urlencoded

16:08:41.874858 INFO [console] [DIO] Authorization: Bearer 768|0VqB9oq4rJLHonOPuJFUBc4D6YaW5mqDHk9mLj7Cb772150c

16:08:41.874942 INFO [console] [DIO] data:

16:08:41.875035 INFO [console] [DIO] {socket_id: 18956522.371490353, channel_name: private-chat.121}

16:08:41.875128 INFO [console] [DIO]

16:08:42.130122 INFO [console] [DIO] *** Response ***

16:08:42.130302 INFO [console] [DIO] uri: https://rehabilitation.most.team/api/broadcasting/auth

16:08:42.130365 INFO [console] [DIO] statusCode: 200

16:08:42.130402 INFO [console] [DIO] statusMessage: OK

16:08:42.130438 INFO [console] [DIO] headers:

16:08:42.130507 INFO [console] [DIO] x-served-by: rehabilitation.most.team

16:08:42.130572 INFO [console] [DIO] access-control-allow-credentials: true

16:08:42.130619 INFO [console] [DIO] connection: keep-alive

16:08:42.130667 INFO [console] [DIO] cache-control: no-cache, private

16:08:42.130714 INFO [console] [DIO] date: Tue, 22 Sep 2026 13:08:42 GMT

16:08:42.130763 INFO [console] [DIO] transfer-encoding: chunked

16:08:42.130824 INFO [console] [DIO] access-control-allow-origin: http://localhost:3000

16:08:42.130873 INFO [console] [DIO] content-type: application/json

16:08:42.130919 INFO [console] [DIO] server: openresty

16:08:42.130962 INFO [console] [DIO] Response Text:

16:08:42.131037 INFO [console] [DIO] {"auth":"local-reverb-key:0de06136b7e49d740e1f4a08fb573dbf2fea040e7f3e694564bbcff7f1b73588"}

16:08:42.131080 INFO [console] [DIO]

16:08:42.131409 INFO [console] [ChatWebSocket] auth response: status=200, data={auth: local-reverb-key:0de06136b7e49d740e1f4a08fb573dbf2fea040e7f3e694564bbcff7f1b73588}

16:08:42.131567 INFO [console] [ChatWebSocket] subscribe send: {channel: private-chat.121, auth: local-reverb-key:0de06136b7e49d740e1f4a08fb573dbf2fea040e7f3e694564bbcff7f1b73588}

16:08:42.132299 INFO [console] [ChatWebSocket] auth request: socketId=18956522.371490353, channel=private-user.324

16:08:42.135130 INFO [console] [DIO] *** Request ***

16:08:42.135286 INFO [console] [DIO] uri: https://rehabilitation.most.team/api/broadcasting/auth

16:08:42.135337 INFO [console] [DIO] method: POST

16:08:42.135397 INFO [console] [DIO] responseType: ResponseType.json

16:08:42.135442 INFO [console] [DIO] followRedirects: true

16:08:42.135517 INFO [console] [DIO] persistentConnection: true

16:08:42.135596 INFO [console] [DIO] connectTimeout: 0:00:10.000000

16:08:42.135662 INFO [console] [DIO] sendTimeout: null

16:08:42.135743 INFO [console] [DIO] receiveTimeout: 0:00:10.000000

16:08:42.135848 INFO [console] [DIO] transformTimeout: null

16:08:42.135914 INFO [console] [DIO] receiveDataWhenStatusError: true

16:08:42.136001 INFO [console] [DIO] extra: {}

16:08:42.136062 INFO [console] [DIO] headers:

16:08:42.136116 INFO [console] [DIO] accept: application/json

16:08:42.136158 INFO [console] [DIO] content-type: application/x-www-form-urlencoded

16:08:42.136192 INFO [console] [DIO] Authorization: Bearer 768|0VqB9oq4rJLHonOPuJFUBc4D6YaW5mqDHk9mLj7Cb772150c

16:08:42.136228 INFO [console] [DIO] data:

16:08:42.136275 INFO [console] [DIO] {socket_id: 18956522.371490353, channel_name: private-user.324}

16:08:42.136331 INFO [console] [DIO]

16:08:42.142193 INFO [console] [ChatWebSocket] incoming raw: type=String, data={"event":"pusher_internal:subscription_succeeded","data":"{}","channel":"private-chat.121"}

16:08:42.142354 INFO [console] [ChatWebSocket] incoming envelope: event=pusher_internal:subscription_succeeded, channel=private-chat.121, data={}

16:08:42.142429 INFO [console] [ChatWebSocket] subscription succeeded: private-chat.121

16:08:42.184908 INFO [console] [DIO] *** Response ***

16:08:42.185111 INFO [console] [DIO] uri: https://rehabilitation.most.team/api/broadcasting/auth

16:08:42.185204 INFO [console] [DIO] statusCode: 200

16:08:42.185251 INFO [console] [DIO] statusMessage: OK

16:08:42.185305 INFO [console] [DIO] headers:

16:08:42.185369 INFO [console] [DIO] x-served-by: rehabilitation.most.team

16:08:42.185434 INFO [console] [DIO] access-control-allow-credentials: true

16:08:42.185513 INFO [console] [DIO] connection: keep-alive

16:08:42.185581 INFO [console] [DIO] cache-control: no-cache, private

16:08:42.185659 INFO [console] [DIO] date: Tue, 22 Sep 2026 13:08:42 GMT

16:08:42.185726 INFO [console] [DIO] transfer-encoding: chunked

16:08:42.185799 INFO [console] [DIO] access-control-allow-origin: http://localhost:3000

16:08:42.185868 INFO [console] [DIO] content-type: application/json

16:08:42.185936 INFO [console] [DIO] server: openresty

16:08:42.186009 INFO [console] [DIO] Response Text:

16:08:42.186094 INFO [console] [DIO] {"auth":"local-reverb-key:eb9e68395ba00c09dae2b92bda9e0a5e47e473a428d798b83a1938cfeca99692"}

16:08:42.186157 INFO [console] [DIO]

16:08:42.186609 INFO [console] [ChatWebSocket] auth response: status=200, data={auth: local-reverb-key:eb9e68395ba00c09dae2b92bda9e0a5e47e473a428d798b83a1938cfeca99692}

16:08:42.186724 INFO [console] [ChatWebSocket] subscribe send: {channel: private-user.324, auth: local-reverb-key:eb9e68395ba00c09dae2b92bda9e0a5e47e473a428d798b83a1938cfeca99692}

16:08:42.194722 INFO [console] [ChatWebSocket] incoming raw: type=String, data={"event":"pusher_internal:subscription_succeeded","data":"{}","channel":"private-user.324"}

16:08:42.194885 INFO [console] [ChatWebSocket] incoming envelope: event=pusher_internal:subscription_succeeded, channel=private-user.324, data={}

16:08:42.194946 INFO [console] [ChatWebSocket] subscription succeeded: private-user.324

16:08:42.234329 ERROR [widgets library] Null check operator used on a null value

Null check operator used on a null value

#0      _TrainingDayItemState.build (package:testapp/features/calendar_page/presentation/widgets/day_details/training_day_item.dart:56:43)
#1      StatefulElement.build (package:flutter/src/widgets/framework.dart:5931:27)
#2      ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5817:15)
#3      StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#4      Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#5      StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#6      Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#7      SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#8      Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#9      SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#10     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#11     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#12     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#13     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#14     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#15     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#16     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#17     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#18     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#19     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#20     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#21     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#22     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#23     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#24     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#25     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#26     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#27     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#28     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#29     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#30     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#31     StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#32     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#33     SliverMultiBoxAdaptorElement.updateChild (package:flutter/src/widgets/sliver.dart:1086:37)
#34     SliverMultiBoxAdaptorElement.performRebuild.processElement (package:flutter/src/widgets/sliver.dart:979:35)
#35     Iterable.forEach (dart:core/iterable.dart:366:35)
#36     SliverMultiBoxAdaptorElement.performRebuild (package:flutter/src/widgets/sliver.dart:1032:24)
#37     SliverMultiBoxAdaptorElement.update (package:flutter/src/widgets/sliver.dart:955:7)
#38     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#39     Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#40     MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#41     _ViewportElement.update (package:flutter/src/widgets/viewport.dart:293:11)
#42     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#43     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#44     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#45     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#46     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#47     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#48     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#49     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#50     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#51     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#52     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#53     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#54     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#55     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#56     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#57     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#58     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#59     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#60     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#61     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#62     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#63     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#64     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#65     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#66     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#67     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#68     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#69     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#70     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#71     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#72     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#73     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#74     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#75     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#76     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#77     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#78     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#79     StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#80     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#81     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#82     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#83     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#84     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#85     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#86     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#87     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#88     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#89     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#90     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#91     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#92     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#93     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#94     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#95     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#96     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#97     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#98     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#99     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#100    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#101    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#102    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#103    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#104    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#105    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#106    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#107    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#108    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#109    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#110    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#111    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#112    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#113    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#114    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#115    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#116    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#117    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#118    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#119    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#120    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#121    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#122    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#123    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#124    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#125    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#126    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#127    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#128    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#129    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#130    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#131    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#132    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#133    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#134    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#135    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#136    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#137    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#138    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#139    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#140    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#141    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#142    Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#143    MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#144    _ViewportElement.update (package:flutter/src/widgets/viewport.dart:293:11)
#145    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#146    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#147    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#148    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#149    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#150    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#151    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#152    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#153    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#154    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#155    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#156    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#157    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#158    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#159    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#160    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#161    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#162    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#163    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#164    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#165    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#166    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#167    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#168    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#169    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#170    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#171    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#172    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#173    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#174    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#175    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#176    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#177    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#178    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#179    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#180    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#181    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#182    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#183    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#184    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#185    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#186    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#187    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#188    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#189    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#190    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#191    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#192    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#193    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#194    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#195    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#196    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#197    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#198    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#199    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
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#201    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
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#204    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
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#206    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#207    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#208    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#209    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#210    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#211    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#212    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#213    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#214    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#215    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#216    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#217    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#218    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#219    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#220    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#221    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#222    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#223    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#224    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#225    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#226    Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#227    MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#228    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#229    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#230    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#231    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#232    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#233    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#234    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#235    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#236    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#237    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#238    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#239    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#240    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#241    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#242    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#243    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#244    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#245    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#246    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#247    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#248    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#249    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#250    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#251    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#252    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#253    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#254    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#255    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#256    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#257    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#258    BuildScope._tryRebuild (package:flutter/src/widgets/framework.dart:2750:15)
#259    BuildScope._flushDirtyElements (package:flutter/src/widgets/framework.dart:2807:11)
#260    BuildOwner.buildScope (package:flutter/src/widgets/framework.dart:3111:18)
#261    WidgetsBinding.drawFrame (package:flutter/src/widgets/binding.dart:1571:21)
#262    RendererBinding._handlePersistentFrameCallback (package:flutter/src/rendering/binding.dart:509:5)
#263    SchedulerBinding._invokeFrameCallback (package:flutter/src/scheduler/binding.dart:1430:15)
#264    SchedulerBinding.handleDrawFrame (package:flutter/src/scheduler/binding.dart:1345:9)
#265    SchedulerBinding._handleDrawFrame (package:flutter/src/scheduler/binding.dart:1198:5)
#266    _rootRun (dart:async/zone_root.dart:35:13)
#267    _CustomZone.run (dart:async/zone.dart:726:19)
#268    _CustomZone.runGuarded (dart:async/zone.dart:625:7)
#269    _invoke (dart:ui/hooks.dart:425:10)
#270    PlatformDispatcher._drawFrame (dart:ui/platform_dispatcher.dart:447:5)
#271    _drawFrame (dart:ui/hooks.dart:395:31)

16:08:42.274224 ERROR [widgets library] Null check operator used on a null value

Null check operator used on a null value

#0      _TrainingDayItemState.build (package:testapp/features/calendar_page/presentation/widgets/day_details/training_day_item.dart:56:43)
#1      StatefulElement.build (package:flutter/src/widgets/framework.dart:5931:27)
#2      ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5817:15)
#3      StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#4      Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#5      StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#6      Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#7      SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#8      Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#9      SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#10     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#11     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#12     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#13     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#14     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#15     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#16     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#17     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#18     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#19     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#20     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#21     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#22     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#23     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#24     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#25     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#26     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#27     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#28     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#29     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#30     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#31     StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#32     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#33     SliverMultiBoxAdaptorElement.updateChild (package:flutter/src/widgets/sliver.dart:1086:37)
#34     SliverMultiBoxAdaptorElement.performRebuild.processElement (package:flutter/src/widgets/sliver.dart:979:35)
#35     Iterable.forEach (dart:core/iterable.dart:366:35)
#36     SliverMultiBoxAdaptorElement.performRebuild (package:flutter/src/widgets/sliver.dart:1032:24)
#37     SliverMultiBoxAdaptorElement.update (package:flutter/src/widgets/sliver.dart:955:7)
#38     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#39     Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#40     MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#41     _ViewportElement.update (package:flutter/src/widgets/viewport.dart:293:11)
#42     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#43     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#44     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#45     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#46     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#47     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#48     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#49     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#50     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#51     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#52     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#53     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#54     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#55     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#56     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#57     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#58     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#59     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#60     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#61     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#62     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#63     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#64     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#65     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#66     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#67     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#68     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#69     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#70     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#71     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#72     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#73     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#74     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#75     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#76     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#77     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#78     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#79     StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#80     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#81     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#82     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#83     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#84     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#85     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#86     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#87     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#88     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#89     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#90     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#91     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#92     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#93     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#94     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#95     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#96     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#97     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#98     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#99     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#100    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#101    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#102    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#103    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#104    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#105    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#106    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#107    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#108    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#109    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#110    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#111    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#112    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#113    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#114    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#115    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#116    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#117    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#118    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#119    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#120    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#121    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#122    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#123    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#124    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#125    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#126    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#127    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#128    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#129    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#130    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#131    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#132    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#133    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#134    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#135    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#136    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#137    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#138    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#139    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#140    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#141    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#142    Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#143    MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#144    _ViewportElement.update (package:flutter/src/widgets/viewport.dart:293:11)
#145    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#146    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#147    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#148    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#149    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#150    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#151    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#152    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#153    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#154    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#155    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#156    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#157    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#158    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#159    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#160    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#161    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#162    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#163    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#164    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#165    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#166    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#167    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#168    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#169    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#170    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#171    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#172    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#173    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#174    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#175    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#176    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#177    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#178    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#179    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#180    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#181    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#182    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#183    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#184    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#185    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#186    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#187    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#188    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#189    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#190    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#191    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#192    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#193    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#194    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#195    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#196    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#197    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#198    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#199    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#200    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#201    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#202    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#203    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#204    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#205    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#206    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#207    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#208    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#209    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#210    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#211    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#212    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#213    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#214    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#215    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#216    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#217    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#218    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#219    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#220    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#221    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#222    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#223    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#224    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#225    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#226    Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#227    MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#228    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#229    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#230    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#231    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#232    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#233    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#234    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#235    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#236    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#237    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#238    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#239    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#240    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#241    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#242    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#243    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#244    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#245    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#246    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#247    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#248    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#249    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#250    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#251    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#252    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#253    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#254    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#255    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#256    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#257    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#258    BuildScope._tryRebuild (package:flutter/src/widgets/framework.dart:2750:15)
#259    BuildScope._flushDirtyElements (package:flutter/src/widgets/framework.dart:2807:11)
#260    BuildOwner.buildScope (package:flutter/src/widgets/framework.dart:3111:18)
#261    WidgetsBinding.drawFrame (package:flutter/src/widgets/binding.dart:1571:21)
#262    RendererBinding._handlePersistentFrameCallback (package:flutter/src/rendering/binding.dart:509:5)
#263    SchedulerBinding._invokeFrameCallback (package:flutter/src/scheduler/binding.dart:1430:15)
#264    SchedulerBinding.handleDrawFrame (package:flutter/src/scheduler/binding.dart:1345:9)
#265    SchedulerBinding._handleDrawFrame (package:flutter/src/scheduler/binding.dart:1198:5)
#266    _rootRun (dart:async/zone_root.dart:35:13)
#267    _CustomZone.run (dart:async/zone.dart:726:19)
#268    _CustomZone.runGuarded (dart:async/zone.dart:625:7)
#269    _invoke (dart:ui/hooks.dart:425:10)
#270    PlatformDispatcher._drawFrame (dart:ui/platform_dispatcher.dart:447:5)
#271    _drawFrame (dart:ui/hooks.dart:395:31)

16:08:42.315689 ERROR [widgets library] Null check operator used on a null value

Null check operator used on a null value

#0      _TrainingDayItemState.build (package:testapp/features/calendar_page/presentation/widgets/day_details/training_day_item.dart:56:43)
#1      StatefulElement.build (package:flutter/src/widgets/framework.dart:5931:27)
#2      ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5817:15)
#3      StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#4      Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#5      StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#6      Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#7      SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#8      Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#9      SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#10     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#11     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#12     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#13     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#14     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#15     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#16     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#17     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#18     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#19     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#20     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#21     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#22     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#23     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#24     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#25     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#26     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#27     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#28     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#29     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#30     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#31     StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#32     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#33     SliverMultiBoxAdaptorElement.updateChild (package:flutter/src/widgets/sliver.dart:1086:37)
#34     SliverMultiBoxAdaptorElement.performRebuild.processElement (package:flutter/src/widgets/sliver.dart:979:35)
#35     Iterable.forEach (dart:core/iterable.dart:366:35)
#36     SliverMultiBoxAdaptorElement.performRebuild (package:flutter/src/widgets/sliver.dart:1032:24)
#37     SliverMultiBoxAdaptorElement.update (package:flutter/src/widgets/sliver.dart:955:7)
#38     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#39     Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#40     MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#41     _ViewportElement.update (package:flutter/src/widgets/viewport.dart:293:11)
#42     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#43     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#44     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#45     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#46     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#47     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#48     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#49     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#50     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#51     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#52     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#53     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#54     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#55     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#56     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#57     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#58     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#59     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#60     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#61     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#62     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#63     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#64     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#65     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#66     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#67     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#68     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#69     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#70     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#71     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#72     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#73     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#74     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#75     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#76     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#77     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#78     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#79     StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#80     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#81     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#82     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#83     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#84     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#85     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#86     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#87     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#88     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#89     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#90     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#91     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#92     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#93     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#94     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#95     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#96     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#97     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#98     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#99     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#100    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#101    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#102    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#103    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#104    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#105    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#106    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#107    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#108    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#109    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#110    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#111    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#112    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#113    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#114    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#115    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#116    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#117    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#118    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#119    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#120    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#121    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#122    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#123    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#124    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#125    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#126    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#127    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#128    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#129    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#130    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#131    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#132    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#133    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#134    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#135    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#136    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#137    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#138    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#139    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#140    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#141    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#142    Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#143    MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#144    _ViewportElement.update (package:flutter/src/widgets/viewport.dart:293:11)
#145    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#146    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#147    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#148    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#149    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#150    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#151    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#152    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#153    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#154    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#155    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#156    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#157    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#158    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#159    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#160    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#161    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#162    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#163    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#164    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#165    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#166    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#167    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#168    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#169    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#170    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#171    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#172    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#173    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#174    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#175    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#176    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#177    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#178    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#179    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#180    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#181    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#182    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#183    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#184    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#185    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#186    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#187    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#188    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#189    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#190    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#191    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#192    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#193    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#194    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#195    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#196    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#197    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#198    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#199    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#200    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#201    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#202    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#203    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#204    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#205    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#206    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#207    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#208    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#209    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#210    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#211    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#212    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#213    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#214    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#215    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#216    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#217    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#218    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#219    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#220    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#221    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#222    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#223    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#224    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#225    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#226    Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#227    MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#228    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#229    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#230    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#231    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#232    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#233    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#234    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#235    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#236    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#237    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#238    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#239    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#240    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#241    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#242    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#243    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#244    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#245    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#246    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#247    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#248    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#249    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#250    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#251    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#252    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#253    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#254    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#255    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#256    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#257    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#258    BuildScope._tryRebuild (package:flutter/src/widgets/framework.dart:2750:15)
#259    BuildScope._flushDirtyElements (package:flutter/src/widgets/framework.dart:2807:11)
#260    BuildOwner.buildScope (package:flutter/src/widgets/framework.dart:3111:18)
#261    WidgetsBinding.drawFrame (package:flutter/src/widgets/binding.dart:1571:21)
#262    RendererBinding._handlePersistentFrameCallback (package:flutter/src/rendering/binding.dart:509:5)
#263    SchedulerBinding._invokeFrameCallback (package:flutter/src/scheduler/binding.dart:1430:15)
#264    SchedulerBinding.handleDrawFrame (package:flutter/src/scheduler/binding.dart:1345:9)
#265    SchedulerBinding._handleDrawFrame (package:flutter/src/scheduler/binding.dart:1198:5)
#266    _rootRun (dart:async/zone_root.dart:35:13)
#267    _CustomZone.run (dart:async/zone.dart:726:19)
#268    _CustomZone.runGuarded (dart:async/zone.dart:625:7)
#269    _invoke (dart:ui/hooks.dart:425:10)
#270    PlatformDispatcher._drawFrame (dart:ui/platform_dispatcher.dart:447:5)
#271    _drawFrame (dart:ui/hooks.dart:395:31)

16:08:42.356526 ERROR [widgets library] Null check operator used on a null value

Null check operator used on a null value

#0      _TrainingDayItemState.build (package:testapp/features/calendar_page/presentation/widgets/day_details/training_day_item.dart:56:43)
#1      StatefulElement.build (package:flutter/src/widgets/framework.dart:5931:27)
#2      ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5817:15)
#3      StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#4      Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#5      StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#6      Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#7      SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#8      Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#9      SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#10     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#11     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#12     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#13     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#14     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#15     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#16     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#17     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#18     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#19     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#20     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#21     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#22     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#23     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#24     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#25     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#26     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#27     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#28     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#29     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#30     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#31     StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#32     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#33     SliverMultiBoxAdaptorElement.updateChild (package:flutter/src/widgets/sliver.dart:1086:37)
#34     SliverMultiBoxAdaptorElement.performRebuild.processElement (package:flutter/src/widgets/sliver.dart:979:35)
#35     Iterable.forEach (dart:core/iterable.dart:366:35)
#36     SliverMultiBoxAdaptorElement.performRebuild (package:flutter/src/widgets/sliver.dart:1032:24)
#37     SliverMultiBoxAdaptorElement.update (package:flutter/src/widgets/sliver.dart:955:7)
#38     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#39     Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#40     MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#41     _ViewportElement.update (package:flutter/src/widgets/viewport.dart:293:11)
#42     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#43     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#44     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#45     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#46     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#47     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#48     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#49     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#50     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#51     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#52     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#53     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#54     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#55     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#56     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#57     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#58     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#59     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#60     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#61     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#62     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#63     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#64     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#65     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#66     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#67     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#68     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#69     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#70     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#71     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#72     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#73     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#74     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#75     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#76     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#77     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#78     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#79     StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#80     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#81     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#82     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#83     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#84     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#85     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#86     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#87     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#88     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#89     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#90     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#91     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#92     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#93     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#94     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#95     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#96     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#97     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#98     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#99     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#100    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#101    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#102    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#103    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#104    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#105    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#106    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#107    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#108    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#109    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#110    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#111    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#112    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#113    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#114    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#115    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#116    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#117    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#118    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#119    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#120    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#121    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#122    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#123    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#124    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#125    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#126    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#127    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#128    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#129    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#130    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#131    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#132    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#133    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#134    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#135    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#136    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#137    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#138    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#139    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#140    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#141    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#142    Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#143    MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#144    _ViewportElement.update (package:flutter/src/widgets/viewport.dart:293:11)
#145    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#146    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#147    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#148    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#149    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#150    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#151    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#152    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#153    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#154    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#155    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#156    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#157    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#158    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#159    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#160    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#161    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#162    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#163    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#164    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#165    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#166    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#167    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#168    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#169    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#170    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#171    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#172    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#173    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#174    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#175    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#176    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#177    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#178    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#179    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#180    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#181    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#182    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#183    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#184    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#185    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#186    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#187    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#188    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#189    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#190    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#191    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#192    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#193    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#194    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#195    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#196    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#197    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#198    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#199    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#200    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#201    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#202    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#203    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#204    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#205    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#206    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#207    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#208    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#209    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#210    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#211    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#212    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#213    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#214    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#215    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#216    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#217    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#218    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#219    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#220    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#221    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#222    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#223    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#224    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#225    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#226    Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#227    MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#228    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#229    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#230    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#231    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#232    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#233    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#234    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#235    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#236    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#237    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#238    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#239    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#240    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#241    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#242    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#243    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#244    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#245    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#246    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#247    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#248    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#249    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#250    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#251    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#252    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#253    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#254    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#255    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#256    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#257    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#258    BuildScope._tryRebuild (package:flutter/src/widgets/framework.dart:2750:15)
#259    BuildScope._flushDirtyElements (package:flutter/src/widgets/framework.dart:2807:11)
#260    BuildOwner.buildScope (package:flutter/src/widgets/framework.dart:3111:18)
#261    WidgetsBinding.drawFrame (package:flutter/src/widgets/binding.dart:1571:21)
#262    RendererBinding._handlePersistentFrameCallback (package:flutter/src/rendering/binding.dart:509:5)
#263    SchedulerBinding._invokeFrameCallback (package:flutter/src/scheduler/binding.dart:1430:15)
#264    SchedulerBinding.handleDrawFrame (package:flutter/src/scheduler/binding.dart:1345:9)
#265    SchedulerBinding._handleDrawFrame (package:flutter/src/scheduler/binding.dart:1198:5)
#266    _rootRun (dart:async/zone_root.dart:35:13)
#267    _CustomZone.run (dart:async/zone.dart:726:19)
#268    _CustomZone.runGuarded (dart:async/zone.dart:625:7)
#269    _invoke (dart:ui/hooks.dart:425:10)
#270    PlatformDispatcher._drawFrame (dart:ui/platform_dispatcher.dart:447:5)
#271    _drawFrame (dart:ui/hooks.dart:395:31)

16:08:42.386159 ERROR [widgets library] Null check operator used on a null value

Null check operator used on a null value

#0      _TrainingDayItemState.build (package:testapp/features/calendar_page/presentation/widgets/day_details/training_day_item.dart:56:43)
#1      StatefulElement.build (package:flutter/src/widgets/framework.dart:5931:27)
#2      ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5817:15)
#3      StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#4      Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#5      StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#6      Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#7      SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#8      Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#9      SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#10     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#11     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#12     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#13     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#14     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#15     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#16     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#17     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#18     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#19     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#20     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#21     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#22     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#23     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#24     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#25     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#26     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#27     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#28     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#29     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#30     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#31     StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#32     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#33     SliverMultiBoxAdaptorElement.updateChild (package:flutter/src/widgets/sliver.dart:1086:37)
#34     SliverMultiBoxAdaptorElement.performRebuild.processElement (package:flutter/src/widgets/sliver.dart:979:35)
#35     Iterable.forEach (dart:core/iterable.dart:366:35)
#36     SliverMultiBoxAdaptorElement.performRebuild (package:flutter/src/widgets/sliver.dart:1032:24)
#37     SliverMultiBoxAdaptorElement.update (package:flutter/src/widgets/sliver.dart:955:7)
#38     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#39     Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#40     MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#41     _ViewportElement.update (package:flutter/src/widgets/viewport.dart:293:11)
#42     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#43     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#44     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#45     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#46     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#47     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#48     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#49     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#50     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#51     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#52     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#53     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#54     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#55     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#56     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#57     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#58     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#59     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#60     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#61     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#62     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#63     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#64     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#65     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#66     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#67     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#68     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#69     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#70     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#71     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#72     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#73     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#74     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#75     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#76     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#77     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#78     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#79     StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#80     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#81     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#82     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#83     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#84     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#85     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#86     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#87     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#88     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#89     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#90     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#91     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#92     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#93     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#94     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#95     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#96     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#97     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#98     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#99     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#100    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#101    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#102    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#103    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#104    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#105    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#106    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#107    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#108    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#109    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#110    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#111    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#112    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#113    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#114    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#115    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#116    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#117    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#118    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#119    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#120    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#121    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#122    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#123    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#124    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#125    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#126    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#127    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#128    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#129    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#130    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#131    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#132    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#133    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#134    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#135    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#136    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#137    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#138    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#139    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#140    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#141    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#142    Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#143    MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#144    _ViewportElement.update (package:flutter/src/widgets/viewport.dart:293:11)
#145    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#146    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#147    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#148    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#149    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#150    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#151    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#152    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#153    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#154    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#155    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#156    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#157    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#158    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#159    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#160    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#161    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#162    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#163    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#164    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#165    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#166    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#167    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#168    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#169    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#170    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#171    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#172    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#173    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#174    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#175    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#176    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#177    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#178    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#179    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#180    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#181    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#182    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#183    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#184    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#185    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#186    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#187    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#188    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#189    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#190    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#191    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#192    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#193    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#194    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#195    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#196    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#197    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#198    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#199    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#200    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#201    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#202    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#203    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#204    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#205    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#206    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#207    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#208    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#209    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#210    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#211    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#212    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#213    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#214    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#215    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#216    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#217    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#218    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#219    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#220    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#221    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#222    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#223    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#224    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#225    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#226    Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#227    MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#228    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#229    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#230    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#231    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#232    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#233    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#234    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#235    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#236    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#237    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#238    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#239    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#240    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#241    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#242    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#243    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#244    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#245    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#246    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#247    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#248    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#249    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#250    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#251    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#252    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#253    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#254    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#255    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#256    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#257    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#258    BuildScope._tryRebuild (package:flutter/src/widgets/framework.dart:2750:15)
#259    BuildScope._flushDirtyElements (package:flutter/src/widgets/framework.dart:2807:11)
#260    BuildOwner.buildScope (package:flutter/src/widgets/framework.dart:3111:18)
#261    WidgetsBinding.drawFrame (package:flutter/src/widgets/binding.dart:1571:21)
#262    RendererBinding._handlePersistentFrameCallback (package:flutter/src/rendering/binding.dart:509:5)
#263    SchedulerBinding._invokeFrameCallback (package:flutter/src/scheduler/binding.dart:1430:15)
#264    SchedulerBinding.handleDrawFrame (package:flutter/src/scheduler/binding.dart:1345:9)
#265    SchedulerBinding._handleDrawFrame (package:flutter/src/scheduler/binding.dart:1198:5)
#266    _rootRun (dart:async/zone_root.dart:35:13)
#267    _CustomZone.run (dart:async/zone.dart:726:19)
#268    _CustomZone.runGuarded (dart:async/zone.dart:625:7)
#269    _invoke (dart:ui/hooks.dart:425:10)
#270    PlatformDispatcher._drawFrame (dart:ui/platform_dispatcher.dart:447:5)
#271    _drawFrame (dart:ui/hooks.dart:395:31)

16:08:42.421099 ERROR [widgets library] Null check operator used on a null value

Null check operator used on a null value

#0      _TrainingDayItemState.build (package:testapp/features/calendar_page/presentation/widgets/day_details/training_day_item.dart:56:43)
#1      StatefulElement.build (package:flutter/src/widgets/framework.dart:5931:27)
#2      ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5817:15)
#3      StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#4      Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#5      StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#6      Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#7      SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#8      Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#9      SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#10     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#11     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#12     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#13     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#14     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#15     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#16     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#17     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#18     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#19     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#20     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#21     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#22     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#23     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#24     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#25     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#26     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#27     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#28     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#29     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#30     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#31     StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#32     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#33     SliverMultiBoxAdaptorElement.updateChild (package:flutter/src/widgets/sliver.dart:1086:37)
#34     SliverMultiBoxAdaptorElement.performRebuild.processElement (package:flutter/src/widgets/sliver.dart:979:35)
#35     Iterable.forEach (dart:core/iterable.dart:366:35)
#36     SliverMultiBoxAdaptorElement.performRebuild (package:flutter/src/widgets/sliver.dart:1032:24)
#37     SliverMultiBoxAdaptorElement.update (package:flutter/src/widgets/sliver.dart:955:7)
#38     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#39     Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#40     MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#41     _ViewportElement.update (package:flutter/src/widgets/viewport.dart:293:11)
#42     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#43     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#44     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#45     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#46     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#47     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#48     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#49     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#50     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#51     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#52     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#53     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#54     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#55     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#56     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#57     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#58     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#59     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#60     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#61     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#62     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#63     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#64     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#65     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#66     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#67     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#68     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#69     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#70     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#71     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#72     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#73     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#74     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#75     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#76     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#77     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#78     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#79     StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#80     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#81     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#82     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#83     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#84     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#85     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#86     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#87     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#88     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#89     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#90     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#91     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#92     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#93     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#94     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#95     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#96     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#97     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#98     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#99     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#100    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#101    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#102    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#103    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#104    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#105    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#106    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#107    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#108    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#109    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#110    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#111    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#112    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#113    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#114    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#115    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#116    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#117    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#118    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#119    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#120    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#121    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#122    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#123    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#124    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#125    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#126    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#127    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#128    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#129    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#130    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#131    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#132    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#133    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#134    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#135    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#136    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#137    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#138    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#139    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#140    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#141    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#142    Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#143    MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#144    _ViewportElement.update (package:flutter/src/widgets/viewport.dart:293:11)
#145    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#146    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#147    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#148    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#149    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#150    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#151    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#152    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#153    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#154    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#155    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#156    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#157    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#158    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#159    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#160    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#161    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#162    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#163    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#164    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#165    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#166    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#167    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#168    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#169    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#170    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#171    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#172    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#173    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#174    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#175    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#176    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#177    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#178    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#179    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#180    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#181    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#182    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#183    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#184    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#185    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#186    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#187    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#188    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#189    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#190    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#191    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#192    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#193    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#194    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#195    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#196    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#197    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#198    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#199    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#200    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#201    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#202    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#203    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#204    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#205    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#206    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#207    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#208    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#209    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#210    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#211    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#212    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#213    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#214    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#215    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#216    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#217    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#218    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#219    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#220    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#221    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#222    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#223    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#224    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#225    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#226    Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#227    MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#228    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#229    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#230    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#231    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#232    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#233    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#234    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#235    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#236    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#237    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#238    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#239    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#240    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#241    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#242    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#243    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#244    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#245    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#246    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#247    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#248    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#249    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#250    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#251    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#252    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#253    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#254    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#255    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#256    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#257    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#258    BuildScope._tryRebuild (package:flutter/src/widgets/framework.dart:2750:15)
#259    BuildScope._flushDirtyElements (package:flutter/src/widgets/framework.dart:2807:11)
#260    BuildOwner.buildScope (package:flutter/src/widgets/framework.dart:3111:18)
#261    WidgetsBinding.drawFrame (package:flutter/src/widgets/binding.dart:1571:21)
#262    RendererBinding._handlePersistentFrameCallback (package:flutter/src/rendering/binding.dart:509:5)
#263    SchedulerBinding._invokeFrameCallback (package:flutter/src/scheduler/binding.dart:1430:15)
#264    SchedulerBinding.handleDrawFrame (package:flutter/src/scheduler/binding.dart:1345:9)
#265    SchedulerBinding._handleDrawFrame (package:flutter/src/scheduler/binding.dart:1198:5)
#266    _rootRun (dart:async/zone_root.dart:35:13)
#267    _CustomZone.run (dart:async/zone.dart:726:19)
#268    _CustomZone.runGuarded (dart:async/zone.dart:625:7)
#269    _invoke (dart:ui/hooks.dart:425:10)
#270    PlatformDispatcher._drawFrame (dart:ui/platform_dispatcher.dart:447:5)
#271    _drawFrame (dart:ui/hooks.dart:395:31)

16:08:42.465038 ERROR [widgets library] Null check operator used on a null value

Null check operator used on a null value

#0      _TrainingDayItemState.build (package:testapp/features/calendar_page/presentation/widgets/day_details/training_day_item.dart:56:43)
#1      StatefulElement.build (package:flutter/src/widgets/framework.dart:5931:27)
#2      ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5817:15)
#3      StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#4      Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#5      StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#6      Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#7      SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#8      Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#9      SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#10     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#11     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#12     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#13     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#14     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#15     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#16     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#17     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#18     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#19     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#20     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#21     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#22     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#23     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#24     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#25     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#26     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#27     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#28     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#29     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#30     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#31     StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#32     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#33     SliverMultiBoxAdaptorElement.updateChild (package:flutter/src/widgets/sliver.dart:1086:37)
#34     SliverMultiBoxAdaptorElement.performRebuild.processElement (package:flutter/src/widgets/sliver.dart:979:35)
#35     Iterable.forEach (dart:core/iterable.dart:366:35)
#36     SliverMultiBoxAdaptorElement.performRebuild (package:flutter/src/widgets/sliver.dart:1032:24)
#37     SliverMultiBoxAdaptorElement.update (package:flutter/src/widgets/sliver.dart:955:7)
#38     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#39     Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#40     MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#41     _ViewportElement.update (package:flutter/src/widgets/viewport.dart:293:11)
#42     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#43     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#44     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#45     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#46     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#47     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#48     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#49     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#50     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#51     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#52     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#53     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#54     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#55     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#56     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#57     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#58     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#59     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#60     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#61     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#62     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#63     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#64     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#65     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#66     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#67     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#68     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#69     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#70     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#71     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#72     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#73     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#74     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#75     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#76     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#77     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#78     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#79     StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#80     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#81     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#82     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#83     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#84     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#85     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#86     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#87     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#88     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#89     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#90     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#91     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#92     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#93     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#94     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#95     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#96     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#97     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#98     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#99     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#100    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#101    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#102    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#103    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#104    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#105    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#106    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#107    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#108    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#109    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#110    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#111    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#112    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#113    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#114    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#115    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#116    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#117    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#118    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#119    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#120    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#121    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#122    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#123    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#124    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#125    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#126    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#127    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#128    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#129    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#130    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#131    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#132    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#133    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#134    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#135    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#136    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#137    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#138    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#139    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#140    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#141    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#142    Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#143    MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#144    _ViewportElement.update (package:flutter/src/widgets/viewport.dart:293:11)
#145    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#146    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#147    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#148    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#149    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#150    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#151    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#152    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#153    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#154    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#155    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#156    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#157    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#158    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#159    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#160    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#161    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#162    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#163    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#164    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#165    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#166    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#167    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#168    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#169    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#170    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#171    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#172    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#173    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#174    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#175    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#176    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#177    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#178    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#179    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#180    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#181    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#182    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#183    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#184    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#185    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#186    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#187    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#188    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#189    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#190    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#191    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#192    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#193    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#194    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#195    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#196    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#197    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#198    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#199    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#200    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#201    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#202    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#203    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#204    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#205    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#206    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#207    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#208    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#209    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#210    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#211    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#212    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#213    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#214    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#215    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#216    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#217    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#218    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#219    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#220    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#221    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#222    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#223    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#224    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#225    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#226    Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#227    MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#228    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#229    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#230    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#231    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#232    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#233    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#234    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#235    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#236    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#237    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#238    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#239    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#240    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#241    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#242    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#243    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#244    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#245    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#246    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#247    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#248    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#249    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#250    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#251    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#252    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#253    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#254    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#255    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#256    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#257    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#258    BuildScope._tryRebuild (package:flutter/src/widgets/framework.dart:2750:15)
#259    BuildScope._flushDirtyElements (package:flutter/src/widgets/framework.dart:2807:11)
#260    BuildOwner.buildScope (package:flutter/src/widgets/framework.dart:3111:18)
#261    WidgetsBinding.drawFrame (package:flutter/src/widgets/binding.dart:1571:21)
#262    RendererBinding._handlePersistentFrameCallback (package:flutter/src/rendering/binding.dart:509:5)
#263    SchedulerBinding._invokeFrameCallback (package:flutter/src/scheduler/binding.dart:1430:15)
#264    SchedulerBinding.handleDrawFrame (package:flutter/src/scheduler/binding.dart:1345:9)
#265    SchedulerBinding._handleDrawFrame (package:flutter/src/scheduler/binding.dart:1198:5)
#266    _rootRun (dart:async/zone_root.dart:35:13)
#267    _CustomZone.run (dart:async/zone.dart:726:19)
#268    _CustomZone.runGuarded (dart:async/zone.dart:625:7)
#269    _invoke (dart:ui/hooks.dart:425:10)
#270    PlatformDispatcher._drawFrame (dart:ui/platform_dispatcher.dart:447:5)
#271    _drawFrame (dart:ui/hooks.dart:395:31)

16:08:42.496228 ERROR [widgets library] Null check operator used on a null value

Null check operator used on a null value

#0      _TrainingDayItemState.build (package:testapp/features/calendar_page/presentation/widgets/day_details/training_day_item.dart:56:43)
#1      StatefulElement.build (package:flutter/src/widgets/framework.dart:5931:27)
#2      ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5817:15)
#3      StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#4      Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#5      StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#6      Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#7      SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#8      Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#9      SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#10     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#11     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#12     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#13     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#14     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#15     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#16     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#17     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#18     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#19     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#20     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#21     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#22     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#23     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#24     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#25     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#26     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#27     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#28     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#29     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#30     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#31     StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#32     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#33     SliverMultiBoxAdaptorElement.updateChild (package:flutter/src/widgets/sliver.dart:1086:37)
#34     SliverMultiBoxAdaptorElement.performRebuild.processElement (package:flutter/src/widgets/sliver.dart:979:35)
#35     Iterable.forEach (dart:core/iterable.dart:366:35)
#36     SliverMultiBoxAdaptorElement.performRebuild (package:flutter/src/widgets/sliver.dart:1032:24)
#37     SliverMultiBoxAdaptorElement.update (package:flutter/src/widgets/sliver.dart:955:7)
#38     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#39     Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#40     MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#41     _ViewportElement.update (package:flutter/src/widgets/viewport.dart:293:11)
#42     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#43     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#44     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#45     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#46     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#47     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#48     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#49     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#50     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#51     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#52     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#53     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#54     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#55     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#56     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#57     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#58     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#59     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#60     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#61     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#62     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#63     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#64     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#65     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#66     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#67     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#68     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#69     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#70     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#71     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#72     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#73     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#74     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#75     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#76     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#77     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#78     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#79     StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#80     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#81     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#82     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#83     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#84     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#85     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#86     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#87     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#88     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#89     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#90     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#91     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#92     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#93     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#94     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#95     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#96     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#97     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#98     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#99     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#100    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#101    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#102    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#103    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#104    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#105    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#106    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#107    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#108    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#109    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#110    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#111    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#112    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#113    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#114    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#115    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#116    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#117    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#118    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#119    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#120    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#121    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#122    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#123    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#124    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#125    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#126    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#127    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#128    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#129    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#130    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#131    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#132    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#133    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#134    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#135    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#136    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#137    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#138    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#139    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#140    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#141    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#142    Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#143    MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#144    _ViewportElement.update (package:flutter/src/widgets/viewport.dart:293:11)
#145    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#146    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#147    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#148    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#149    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#150    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#151    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#152    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#153    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#154    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#155    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#156    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#157    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#158    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#159    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#160    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#161    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#162    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#163    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#164    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#165    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#166    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#167    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#168    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#169    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#170    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#171    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#172    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#173    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#174    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#175    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#176    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#177    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#178    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#179    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#180    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#181    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#182    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#183    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#184    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#185    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#186    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#187    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#188    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#189    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#190    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#191    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#192    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#193    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#194    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#195    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#196    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#197    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#198    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#199    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#200    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#201    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#202    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#203    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#204    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#205    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#206    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#207    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#208    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#209    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#210    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#211    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#212    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#213    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#214    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#215    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#216    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#217    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#218    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#219    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#220    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#221    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#222    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#223    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#224    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#225    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#226    Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#227    MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#228    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#229    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#230    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#231    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#232    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#233    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#234    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#235    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#236    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#237    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#238    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#239    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#240    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#241    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#242    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#243    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#244    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#245    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#246    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#247    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#248    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#249    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#250    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#251    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#252    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#253    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#254    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#255    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#256    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#257    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#258    BuildScope._tryRebuild (package:flutter/src/widgets/framework.dart:2750:15)
#259    BuildScope._flushDirtyElements (package:flutter/src/widgets/framework.dart:2807:11)
#260    BuildOwner.buildScope (package:flutter/src/widgets/framework.dart:3111:18)
#261    WidgetsBinding.drawFrame (package:flutter/src/widgets/binding.dart:1571:21)
#262    RendererBinding._handlePersistentFrameCallback (package:flutter/src/rendering/binding.dart:509:5)
#263    SchedulerBinding._invokeFrameCallback (package:flutter/src/scheduler/binding.dart:1430:15)
#264    SchedulerBinding.handleDrawFrame (package:flutter/src/scheduler/binding.dart:1345:9)
#265    SchedulerBinding._handleDrawFrame (package:flutter/src/scheduler/binding.dart:1198:5)
#266    _rootRun (dart:async/zone_root.dart:35:13)
#267    _CustomZone.run (dart:async/zone.dart:726:19)
#268    _CustomZone.runGuarded (dart:async/zone.dart:625:7)
#269    _invoke (dart:ui/hooks.dart:425:10)
#270    PlatformDispatcher._drawFrame (dart:ui/platform_dispatcher.dart:447:5)
#271    _drawFrame (dart:ui/hooks.dart:395:31)

16:08:42.528903 ERROR [widgets library] Null check operator used on a null value

Null check operator used on a null value

#0      _TrainingDayItemState.build (package:testapp/features/calendar_page/presentation/widgets/day_details/training_day_item.dart:56:43)
#1      StatefulElement.build (package:flutter/src/widgets/framework.dart:5931:27)
#2      ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5817:15)
#3      StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#4      Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#5      StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#6      Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#7      SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#8      Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#9      SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#10     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#11     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#12     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#13     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#14     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#15     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#16     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#17     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#18     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#19     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#20     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#21     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#22     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#23     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#24     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#25     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#26     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#27     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#28     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#29     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#30     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#31     StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#32     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#33     SliverMultiBoxAdaptorElement.updateChild (package:flutter/src/widgets/sliver.dart:1086:37)
#34     SliverMultiBoxAdaptorElement.performRebuild.processElement (package:flutter/src/widgets/sliver.dart:979:35)
#35     Iterable.forEach (dart:core/iterable.dart:366:35)
#36     SliverMultiBoxAdaptorElement.performRebuild (package:flutter/src/widgets/sliver.dart:1032:24)
#37     SliverMultiBoxAdaptorElement.update (package:flutter/src/widgets/sliver.dart:955:7)
#38     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#39     Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#40     MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#41     _ViewportElement.update (package:flutter/src/widgets/viewport.dart:293:11)
#42     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#43     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#44     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#45     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#46     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#47     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#48     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#49     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#50     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#51     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#52     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#53     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#54     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#55     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#56     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#57     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#58     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#59     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#60     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#61     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#62     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#63     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#64     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#65     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#66     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#67     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#68     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#69     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#70     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#71     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#72     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#73     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#74     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#75     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#76     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#77     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#78     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#79     StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#80     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#81     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#82     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#83     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#84     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#85     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#86     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#87     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#88     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#89     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#90     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#91     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#92     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#93     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#94     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#95     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#96     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#97     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#98     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#99     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#100    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#101    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#102    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#103    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#104    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#105    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#106    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#107    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#108    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#109    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#110    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#111    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#112    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#113    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#114    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#115    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#116    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#117    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#118    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#119    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#120    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#121    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#122    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#123    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#124    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#125    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#126    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#127    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#128    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#129    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#130    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#131    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#132    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#133    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#134    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#135    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#136    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#137    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#138    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#139    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#140    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#141    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#142    Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#143    MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#144    _ViewportElement.update (package:flutter/src/widgets/viewport.dart:293:11)
#145    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#146    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#147    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#148    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#149    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#150    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#151    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#152    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#153    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#154    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#155    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#156    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#157    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#158    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#159    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#160    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#161    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#162    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#163    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#164    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#165    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#166    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#167    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#168    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#169    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#170    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#171    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#172    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#173    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#174    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#175    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#176    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#177    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#178    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#179    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#180    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#181    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#182    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#183    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#184    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#185    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#186    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#187    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#188    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#189    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#190    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#191    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#192    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#193    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#194    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#195    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#196    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#197    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#198    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#199    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#200    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#201    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#202    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#203    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#204    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#205    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#206    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#207    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#208    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#209    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#210    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#211    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#212    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#213    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#214    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#215    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#216    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#217    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#218    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#219    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#220    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#221    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#222    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#223    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#224    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#225    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#226    Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#227    MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#228    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#229    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#230    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#231    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#232    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#233    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#234    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#235    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#236    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#237    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#238    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#239    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#240    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#241    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#242    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#243    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#244    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#245    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#246    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#247    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#248    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#249    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#250    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#251    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#252    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#253    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#254    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#255    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#256    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#257    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#258    BuildScope._tryRebuild (package:flutter/src/widgets/framework.dart:2750:15)
#259    BuildScope._flushDirtyElements (package:flutter/src/widgets/framework.dart:2807:11)
#260    BuildOwner.buildScope (package:flutter/src/widgets/framework.dart:3111:18)
#261    WidgetsBinding.drawFrame (package:flutter/src/widgets/binding.dart:1571:21)
#262    RendererBinding._handlePersistentFrameCallback (package:flutter/src/rendering/binding.dart:509:5)
#263    SchedulerBinding._invokeFrameCallback (package:flutter/src/scheduler/binding.dart:1430:15)
#264    SchedulerBinding.handleDrawFrame (package:flutter/src/scheduler/binding.dart:1345:9)
#265    SchedulerBinding._handleDrawFrame (package:flutter/src/scheduler/binding.dart:1198:5)
#266    _rootRun (dart:async/zone_root.dart:35:13)
#267    _CustomZone.run (dart:async/zone.dart:726:19)
#268    _CustomZone.runGuarded (dart:async/zone.dart:625:7)
#269    _invoke (dart:ui/hooks.dart:425:10)
#270    PlatformDispatcher._drawFrame (dart:ui/platform_dispatcher.dart:447:5)
#271    _drawFrame (dart:ui/hooks.dart:395:31)

16:08:42.565629 ERROR [widgets library] Null check operator used on a null value

Null check operator used on a null value

#0      _TrainingDayItemState.build (package:testapp/features/calendar_page/presentation/widgets/day_details/training_day_item.dart:56:43)
#1      StatefulElement.build (package:flutter/src/widgets/framework.dart:5931:27)
#2      ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5817:15)
#3      StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#4      Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#5      StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#6      Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#7      SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#8      Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#9      SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#10     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#11     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#12     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#13     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#14     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#15     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#16     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#17     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#18     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#19     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#20     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#21     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#22     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#23     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#24     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#25     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#26     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#27     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#28     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#29     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#30     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#31     StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#32     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#33     SliverMultiBoxAdaptorElement.updateChild (package:flutter/src/widgets/sliver.dart:1086:37)
#34     SliverMultiBoxAdaptorElement.performRebuild.processElement (package:flutter/src/widgets/sliver.dart:979:35)
#35     Iterable.forEach (dart:core/iterable.dart:366:35)
#36     SliverMultiBoxAdaptorElement.performRebuild (package:flutter/src/widgets/sliver.dart:1032:24)
#37     SliverMultiBoxAdaptorElement.update (package:flutter/src/widgets/sliver.dart:955:7)
#38     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#39     Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#40     MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#41     _ViewportElement.update (package:flutter/src/widgets/viewport.dart:293:11)
#42     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#43     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#44     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#45     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#46     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#47     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#48     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#49     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#50     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#51     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#52     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#53     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#54     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#55     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#56     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#57     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#58     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#59     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#60     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#61     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#62     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#63     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#64     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#65     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#66     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#67     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#68     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#69     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#70     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#71     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#72     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#73     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#74     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#75     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#76     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#77     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#78     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#79     StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#80     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#81     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#82     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#83     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#84     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#85     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#86     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#87     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#88     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#89     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#90     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#91     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#92     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#93     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#94     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#95     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#96     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#97     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#98     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#99     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#100    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#101    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#102    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#103    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#104    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#105    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#106    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#107    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#108    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#109    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#110    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#111    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#112    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#113    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#114    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#115    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#116    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#117    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#118    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#119    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#120    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#121    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#122    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#123    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#124    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#125    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#126    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#127    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#128    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#129    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#130    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#131    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#132    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#133    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#134    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#135    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#136    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#137    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#138    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#139    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#140    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#141    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#142    Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#143    MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#144    _ViewportElement.update (package:flutter/src/widgets/viewport.dart:293:11)
#145    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#146    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#147    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#148    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#149    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#150    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#151    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#152    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#153    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#154    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#155    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#156    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#157    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#158    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#159    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#160    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#161    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#162    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#163    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#164    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#165    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#166    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#167    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#168    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#169    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#170    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#171    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#172    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#173    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#174    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#175    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#176    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#177    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#178    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#179    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#180    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#181    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#182    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#183    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#184    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#185    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#186    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#187    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#188    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#189    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#190    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#191    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#192    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#193    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#194    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#195    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#196    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#197    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#198    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#199    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#200    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#201    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#202    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#203    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#204    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#205    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#206    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#207    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#208    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#209    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#210    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#211    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#212    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#213    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#214    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#215    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#216    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#217    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#218    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#219    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#220    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#221    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#222    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#223    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#224    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#225    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#226    Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#227    MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#228    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#229    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#230    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#231    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#232    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#233    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#234    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#235    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#236    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#237    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#238    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#239    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#240    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#241    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#242    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#243    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#244    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#245    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#246    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#247    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#248    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#249    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#250    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#251    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#252    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#253    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#254    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#255    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#256    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#257    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#258    BuildScope._tryRebuild (package:flutter/src/widgets/framework.dart:2750:15)
#259    BuildScope._flushDirtyElements (package:flutter/src/widgets/framework.dart:2807:11)
#260    BuildOwner.buildScope (package:flutter/src/widgets/framework.dart:3111:18)
#261    WidgetsBinding.drawFrame (package:flutter/src/widgets/binding.dart:1571:21)
#262    RendererBinding._handlePersistentFrameCallback (package:flutter/src/rendering/binding.dart:509:5)
#263    SchedulerBinding._invokeFrameCallback (package:flutter/src/scheduler/binding.dart:1430:15)
#264    SchedulerBinding.handleDrawFrame (package:flutter/src/scheduler/binding.dart:1345:9)
#265    SchedulerBinding._handleDrawFrame (package:flutter/src/scheduler/binding.dart:1198:5)
#266    _rootRun (dart:async/zone_root.dart:35:13)
#267    _CustomZone.run (dart:async/zone.dart:726:19)
#268    _CustomZone.runGuarded (dart:async/zone.dart:625:7)
#269    _invoke (dart:ui/hooks.dart:425:10)
#270    PlatformDispatcher._drawFrame (dart:ui/platform_dispatcher.dart:447:5)
#271    _drawFrame (dart:ui/hooks.dart:395:31)

16:08:42.608936 ERROR [widgets library] Null check operator used on a null value

Null check operator used on a null value

#0      _TrainingDayItemState.build (package:testapp/features/calendar_page/presentation/widgets/day_details/training_day_item.dart:56:43)
#1      StatefulElement.build (package:flutter/src/widgets/framework.dart:5931:27)
#2      ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5817:15)
#3      StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#4      Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#5      StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#6      Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#7      SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#8      Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#9      SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#10     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#11     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#12     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#13     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#14     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#15     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#16     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#17     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#18     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#19     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#20     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#21     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#22     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#23     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#24     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#25     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#26     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#27     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#28     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#29     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#30     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#31     StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#32     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#33     SliverMultiBoxAdaptorElement.updateChild (package:flutter/src/widgets/sliver.dart:1086:37)
#34     SliverMultiBoxAdaptorElement.performRebuild.processElement (package:flutter/src/widgets/sliver.dart:979:35)
#35     Iterable.forEach (dart:core/iterable.dart:366:35)
#36     SliverMultiBoxAdaptorElement.performRebuild (package:flutter/src/widgets/sliver.dart:1032:24)
#37     SliverMultiBoxAdaptorElement.update (package:flutter/src/widgets/sliver.dart:955:7)
#38     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#39     Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#40     MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#41     _ViewportElement.update (package:flutter/src/widgets/viewport.dart:293:11)
#42     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#43     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#44     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#45     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#46     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#47     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#48     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#49     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#50     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#51     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#52     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#53     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#54     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#55     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#56     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#57     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#58     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#59     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#60     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#61     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#62     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#63     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#64     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#65     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#66     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#67     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#68     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#69     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#70     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#71     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#72     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#73     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#74     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#75     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#76     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#77     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#78     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#79     StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#80     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#81     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#82     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#83     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#84     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#85     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#86     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#87     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#88     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#89     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#90     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#91     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#92     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#93     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#94     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#95     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#96     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#97     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#98     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#99     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#100    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#101    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#102    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#103    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#104    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#105    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#106    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#107    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#108    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#109    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#110    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#111    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#112    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#113    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#114    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#115    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#116    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#117    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#118    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#119    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#120    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#121    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#122    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#123    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#124    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#125    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#126    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#127    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#128    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#129    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#130    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#131    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#132    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#133    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#134    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#135    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#136    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#137    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#138    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#139    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#140    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#141    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#142    Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#143    MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#144    _ViewportElement.update (package:flutter/src/widgets/viewport.dart:293:11)
#145    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#146    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#147    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#148    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#149    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#150    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#151    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#152    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#153    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#154    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#155    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#156    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#157    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#158    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#159    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#160    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#161    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#162    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#163    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#164    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#165    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#166    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#167    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#168    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#169    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#170    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#171    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#172    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#173    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#174    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#175    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#176    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#177    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#178    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#179    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#180    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#181    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#182    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#183    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#184    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#185    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#186    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#187    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#188    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#189    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#190    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#191    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#192    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#193    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#194    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#195    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#196    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#197    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#198    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#199    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#200    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#201    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#202    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#203    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#204    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#205    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#206    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#207    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#208    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#209    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#210    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#211    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#212    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#213    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#214    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#215    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#216    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#217    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#218    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#219    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#220    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#221    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#222    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#223    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#224    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#225    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#226    Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#227    MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#228    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#229    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#230    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#231    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#232    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#233    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#234    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#235    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#236    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#237    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#238    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#239    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#240    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#241    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#242    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#243    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#244    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#245    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#246    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#247    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#248    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#249    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#250    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#251    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#252    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#253    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#254    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#255    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#256    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#257    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#258    BuildScope._tryRebuild (package:flutter/src/widgets/framework.dart:2750:15)
#259    BuildScope._flushDirtyElements (package:flutter/src/widgets/framework.dart:2807:11)
#260    BuildOwner.buildScope (package:flutter/src/widgets/framework.dart:3111:18)
#261    WidgetsBinding.drawFrame (package:flutter/src/widgets/binding.dart:1571:21)
#262    RendererBinding._handlePersistentFrameCallback (package:flutter/src/rendering/binding.dart:509:5)
#263    SchedulerBinding._invokeFrameCallback (package:flutter/src/scheduler/binding.dart:1430:15)
#264    SchedulerBinding.handleDrawFrame (package:flutter/src/scheduler/binding.dart:1345:9)
#265    SchedulerBinding._handleDrawFrame (package:flutter/src/scheduler/binding.dart:1198:5)
#266    _rootRun (dart:async/zone_root.dart:35:13)
#267    _CustomZone.run (dart:async/zone.dart:726:19)
#268    _CustomZone.runGuarded (dart:async/zone.dart:625:7)
#269    _invoke (dart:ui/hooks.dart:425:10)
#270    PlatformDispatcher._drawFrame (dart:ui/platform_dispatcher.dart:447:5)
#271    _drawFrame (dart:ui/hooks.dart:395:31)

16:08:42.646025 ERROR [widgets library] Null check operator used on a null value

Null check operator used on a null value

#0      _TrainingDayItemState.build (package:testapp/features/calendar_page/presentation/widgets/day_details/training_day_item.dart:56:43)
#1      StatefulElement.build (package:flutter/src/widgets/framework.dart:5931:27)
#2      ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5817:15)
#3      StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#4      Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#5      StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#6      Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#7      SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#8      Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#9      SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#10     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#11     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#12     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#13     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#14     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#15     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#16     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#17     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#18     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#19     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#20     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#21     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#22     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#23     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#24     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#25     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#26     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#27     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#28     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#29     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#30     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#31     StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#32     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#33     SliverMultiBoxAdaptorElement.updateChild (package:flutter/src/widgets/sliver.dart:1086:37)
#34     SliverMultiBoxAdaptorElement.performRebuild.processElement (package:flutter/src/widgets/sliver.dart:979:35)
#35     Iterable.forEach (dart:core/iterable.dart:366:35)
#36     SliverMultiBoxAdaptorElement.performRebuild (package:flutter/src/widgets/sliver.dart:1032:24)
#37     SliverMultiBoxAdaptorElement.update (package:flutter/src/widgets/sliver.dart:955:7)
#38     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#39     Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#40     MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#41     _ViewportElement.update (package:flutter/src/widgets/viewport.dart:293:11)
#42     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#43     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#44     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#45     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#46     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#47     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#48     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#49     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#50     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#51     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#52     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#53     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#54     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#55     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#56     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#57     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#58     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#59     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#60     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#61     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#62     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#63     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#64     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#65     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#66     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#67     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#68     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#69     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#70     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#71     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#72     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#73     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#74     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#75     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#76     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#77     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#78     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#79     StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#80     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#81     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#82     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#83     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#84     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#85     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#86     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#87     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#88     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#89     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#90     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#91     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#92     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#93     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#94     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#95     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#96     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#97     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#98     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#99     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#100    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#101    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#102    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#103    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#104    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#105    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#106    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#107    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#108    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#109    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#110    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#111    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#112    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#113    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#114    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#115    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#116    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#117    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#118    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#119    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#120    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#121    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#122    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#123    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#124    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#125    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#126    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#127    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#128    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#129    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#130    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#131    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#132    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#133    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#134    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#135    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#136    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#137    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#138    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#139    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#140    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#141    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#142    Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#143    MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#144    _ViewportElement.update (package:flutter/src/widgets/viewport.dart:293:11)
#145    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#146    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#147    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#148    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#149    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#150    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#151    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#152    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#153    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#154    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#155    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#156    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#157    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#158    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#159    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#160    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#161    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#162    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#163    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#164    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#165    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#166    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#167    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#168    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#169    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#170    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#171    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#172    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#173    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#174    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#175    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#176    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#177    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#178    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#179    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#180    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#181    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#182    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#183    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#184    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#185    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#186    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#187    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#188    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#189    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#190    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#191    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#192    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#193    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#194    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#195    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#196    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#197    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#198    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#199    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#200    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#201    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#202    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#203    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#204    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#205    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#206    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#207    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#208    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#209    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#210    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#211    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#212    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#213    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#214    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#215    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#216    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#217    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#218    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#219    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#220    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#221    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#222    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#223    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#224    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#225    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#226    Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#227    MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#228    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#229    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#230    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#231    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#232    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#233    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#234    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#235    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#236    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#237    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#238    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#239    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#240    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#241    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#242    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#243    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#244    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#245    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#246    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#247    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#248    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#249    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#250    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#251    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#252    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#253    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#254    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#255    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#256    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#257    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#258    BuildScope._tryRebuild (package:flutter/src/widgets/framework.dart:2750:15)
#259    BuildScope._flushDirtyElements (package:flutter/src/widgets/framework.dart:2807:11)
#260    BuildOwner.buildScope (package:flutter/src/widgets/framework.dart:3111:18)
#261    WidgetsBinding.drawFrame (package:flutter/src/widgets/binding.dart:1571:21)
#262    RendererBinding._handlePersistentFrameCallback (package:flutter/src/rendering/binding.dart:509:5)
#263    SchedulerBinding._invokeFrameCallback (package:flutter/src/scheduler/binding.dart:1430:15)
#264    SchedulerBinding.handleDrawFrame (package:flutter/src/scheduler/binding.dart:1345:9)
#265    SchedulerBinding._handleDrawFrame (package:flutter/src/scheduler/binding.dart:1198:5)
#266    _rootRun (dart:async/zone_root.dart:35:13)
#267    _CustomZone.run (dart:async/zone.dart:726:19)
#268    _CustomZone.runGuarded (dart:async/zone.dart:625:7)
#269    _invoke (dart:ui/hooks.dart:425:10)
#270    PlatformDispatcher._drawFrame (dart:ui/platform_dispatcher.dart:447:5)
#271    _drawFrame (dart:ui/hooks.dart:395:31)

16:08:42.678868 ERROR [widgets library] Null check operator used on a null value

Null check operator used on a null value

#0      _TrainingDayItemState.build (package:testapp/features/calendar_page/presentation/widgets/day_details/training_day_item.dart:56:43)
#1      StatefulElement.build (package:flutter/src/widgets/framework.dart:5931:27)
#2      ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5817:15)
#3      StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#4      Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#5      StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#6      Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#7      SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#8      Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#9      SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#10     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#11     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#12     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#13     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#14     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#15     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#16     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#17     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#18     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#19     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#20     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#21     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#22     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#23     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#24     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#25     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#26     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#27     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#28     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#29     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#30     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#31     StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#32     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#33     SliverMultiBoxAdaptorElement.updateChild (package:flutter/src/widgets/sliver.dart:1086:37)
#34     SliverMultiBoxAdaptorElement.performRebuild.processElement (package:flutter/src/widgets/sliver.dart:979:35)
#35     Iterable.forEach (dart:core/iterable.dart:366:35)
#36     SliverMultiBoxAdaptorElement.performRebuild (package:flutter/src/widgets/sliver.dart:1032:24)
#37     SliverMultiBoxAdaptorElement.update (package:flutter/src/widgets/sliver.dart:955:7)
#38     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#39     Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#40     MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#41     _ViewportElement.update (package:flutter/src/widgets/viewport.dart:293:11)
#42     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#43     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#44     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#45     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#46     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#47     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#48     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#49     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#50     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#51     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#52     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#53     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#54     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#55     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#56     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#57     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#58     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#59     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#60     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#61     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#62     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#63     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#64     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#65     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#66     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#67     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#68     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#69     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#70     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#71     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#72     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#73     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#74     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#75     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#76     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#77     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#78     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#79     StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#80     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#81     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#82     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#83     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#84     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#85     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#86     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#87     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#88     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#89     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#90     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#91     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#92     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#93     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#94     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#95     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#96     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#97     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#98     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#99     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#100    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#101    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#102    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#103    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#104    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#105    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#106    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#107    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#108    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#109    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#110    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#111    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#112    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#113    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#114    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#115    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#116    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#117    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#118    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#119    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#120    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#121    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#122    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#123    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#124    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#125    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#126    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#127    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#128    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#129    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#130    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#131    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#132    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#133    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#134    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#135    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#136    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#137    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#138    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#139    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#140    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#141    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#142    Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#143    MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#144    _ViewportElement.update (package:flutter/src/widgets/viewport.dart:293:11)
#145    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#146    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#147    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#148    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#149    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#150    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#151    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#152    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#153    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#154    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#155    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#156    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#157    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#158    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#159    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#160    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#161    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#162    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#163    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#164    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#165    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#166    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#167    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#168    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#169    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#170    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#171    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#172    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#173    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#174    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#175    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#176    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#177    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#178    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#179    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#180    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#181    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#182    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#183    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#184    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#185    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#186    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#187    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#188    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#189    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#190    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#191    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#192    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#193    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#194    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#195    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#196    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#197    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#198    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#199    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#200    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#201    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#202    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#203    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#204    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#205    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#206    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#207    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#208    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#209    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#210    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#211    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#212    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#213    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#214    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#215    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#216    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#217    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#218    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#219    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#220    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#221    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#222    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#223    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#224    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#225    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#226    Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#227    MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#228    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#229    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#230    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#231    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#232    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#233    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#234    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#235    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#236    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#237    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#238    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#239    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#240    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#241    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#242    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#243    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#244    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#245    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#246    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#247    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#248    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#249    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#250    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#251    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#252    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#253    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#254    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#255    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#256    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#257    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#258    BuildScope._tryRebuild (package:flutter/src/widgets/framework.dart:2750:15)
#259    BuildScope._flushDirtyElements (package:flutter/src/widgets/framework.dart:2807:11)
#260    BuildOwner.buildScope (package:flutter/src/widgets/framework.dart:3111:18)
#261    WidgetsBinding.drawFrame (package:flutter/src/widgets/binding.dart:1571:21)
#262    RendererBinding._handlePersistentFrameCallback (package:flutter/src/rendering/binding.dart:509:5)
#263    SchedulerBinding._invokeFrameCallback (package:flutter/src/scheduler/binding.dart:1430:15)
#264    SchedulerBinding.handleDrawFrame (package:flutter/src/scheduler/binding.dart:1345:9)
#265    SchedulerBinding._handleDrawFrame (package:flutter/src/scheduler/binding.dart:1198:5)
#266    _rootRun (dart:async/zone_root.dart:35:13)
#267    _CustomZone.run (dart:async/zone.dart:726:19)
#268    _CustomZone.runGuarded (dart:async/zone.dart:625:7)
#269    _invoke (dart:ui/hooks.dart:425:10)
#270    PlatformDispatcher._drawFrame (dart:ui/platform_dispatcher.dart:447:5)
#271    _drawFrame (dart:ui/hooks.dart:395:31)

16:08:42.711921 ERROR [widgets library] Null check operator used on a null value

Null check operator used on a null value

#0      _TrainingDayItemState.build (package:testapp/features/calendar_page/presentation/widgets/day_details/training_day_item.dart:56:43)
#1      StatefulElement.build (package:flutter/src/widgets/framework.dart:5931:27)
#2      ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5817:15)
#3      StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#4      Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#5      StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#6      Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#7      SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#8      Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#9      SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#10     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#11     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#12     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#13     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#14     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#15     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#16     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#17     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#18     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#19     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#20     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#21     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#22     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#23     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#24     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#25     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#26     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#27     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#28     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#29     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#30     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#31     StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#32     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#33     SliverMultiBoxAdaptorElement.updateChild (package:flutter/src/widgets/sliver.dart:1086:37)
#34     SliverMultiBoxAdaptorElement.performRebuild.processElement (package:flutter/src/widgets/sliver.dart:979:35)
#35     Iterable.forEach (dart:core/iterable.dart:366:35)
#36     SliverMultiBoxAdaptorElement.performRebuild (package:flutter/src/widgets/sliver.dart:1032:24)
#37     SliverMultiBoxAdaptorElement.update (package:flutter/src/widgets/sliver.dart:955:7)
#38     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#39     Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#40     MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#41     _ViewportElement.update (package:flutter/src/widgets/viewport.dart:293:11)
#42     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#43     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#44     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#45     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#46     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#47     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#48     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#49     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#50     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#51     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#52     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#53     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#54     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#55     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#56     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#57     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#58     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#59     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#60     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#61     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#62     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#63     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#64     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#65     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#66     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#67     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#68     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#69     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#70     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#71     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#72     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#73     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#74     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#75     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#76     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#77     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#78     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#79     StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#80     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#81     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#82     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#83     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#84     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#85     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#86     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#87     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#88     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#89     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#90     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#91     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#92     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#93     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#94     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#95     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#96     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#97     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#98     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#99     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#100    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#101    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#102    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#103    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#104    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#105    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#106    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#107    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#108    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#109    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#110    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#111    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#112    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#113    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#114    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#115    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#116    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#117    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#118    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#119    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#120    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#121    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#122    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#123    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#124    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#125    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#126    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#127    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#128    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#129    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#130    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#131    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#132    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#133    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#134    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#135    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#136    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#137    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#138    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#139    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#140    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#141    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#142    Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#143    MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#144    _ViewportElement.update (package:flutter/src/widgets/viewport.dart:293:11)
#145    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#146    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#147    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#148    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#149    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#150    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#151    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#152    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#153    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#154    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#155    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#156    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#157    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#158    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#159    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#160    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#161    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#162    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#163    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#164    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#165    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#166    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#167    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#168    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#169    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#170    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#171    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#172    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#173    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#174    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#175    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#176    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#177    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#178    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#179    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#180    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#181    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#182    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#183    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#184    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#185    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#186    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#187    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#188    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#189    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#190    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#191    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#192    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#193    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#194    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#195    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#196    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#197    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#198    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#199    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#200    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#201    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#202    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#203    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#204    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#205    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#206    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#207    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#208    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#209    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#210    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#211    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#212    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#213    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#214    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#215    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#216    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#217    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#218    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#219    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#220    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#221    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#222    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#223    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#224    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#225    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#226    Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#227    MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#228    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#229    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#230    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#231    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#232    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#233    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#234    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#235    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#236    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#237    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#238    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#239    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#240    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#241    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#242    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#243    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#244    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#245    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#246    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#247    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#248    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#249    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#250    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#251    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#252    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#253    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#254    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#255    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#256    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#257    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#258    BuildScope._tryRebuild (package:flutter/src/widgets/framework.dart:2750:15)
#259    BuildScope._flushDirtyElements (package:flutter/src/widgets/framework.dart:2807:11)
#260    BuildOwner.buildScope (package:flutter/src/widgets/framework.dart:3111:18)
#261    WidgetsBinding.drawFrame (package:flutter/src/widgets/binding.dart:1571:21)
#262    RendererBinding._handlePersistentFrameCallback (package:flutter/src/rendering/binding.dart:509:5)
#263    SchedulerBinding._invokeFrameCallback (package:flutter/src/scheduler/binding.dart:1430:15)
#264    SchedulerBinding.handleDrawFrame (package:flutter/src/scheduler/binding.dart:1345:9)
#265    SchedulerBinding._handleDrawFrame (package:flutter/src/scheduler/binding.dart:1198:5)
#266    _rootRun (dart:async/zone_root.dart:35:13)
#267    _CustomZone.run (dart:async/zone.dart:726:19)
#268    _CustomZone.runGuarded (dart:async/zone.dart:625:7)
#269    _invoke (dart:ui/hooks.dart:425:10)
#270    PlatformDispatcher._drawFrame (dart:ui/platform_dispatcher.dart:447:5)
#271    _drawFrame (dart:ui/hooks.dart:395:31)

16:08:42.746385 ERROR [widgets library] Null check operator used on a null value

Null check operator used on a null value

#0      _TrainingDayItemState.build (package:testapp/features/calendar_page/presentation/widgets/day_details/training_day_item.dart:56:43)
#1      StatefulElement.build (package:flutter/src/widgets/framework.dart:5931:27)
#2      ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5817:15)
#3      StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#4      Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#5      StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#6      Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#7      SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#8      Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#9      SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#10     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#11     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#12     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#13     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#14     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#15     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#16     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#17     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#18     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#19     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#20     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#21     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#22     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#23     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#24     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#25     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#26     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#27     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#28     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#29     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#30     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#31     StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#32     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#33     SliverMultiBoxAdaptorElement.updateChild (package:flutter/src/widgets/sliver.dart:1086:37)
#34     SliverMultiBoxAdaptorElement.performRebuild.processElement (package:flutter/src/widgets/sliver.dart:979:35)
#35     Iterable.forEach (dart:core/iterable.dart:366:35)
#36     SliverMultiBoxAdaptorElement.performRebuild (package:flutter/src/widgets/sliver.dart:1032:24)
#37     SliverMultiBoxAdaptorElement.update (package:flutter/src/widgets/sliver.dart:955:7)
#38     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#39     Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#40     MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#41     _ViewportElement.update (package:flutter/src/widgets/viewport.dart:293:11)
#42     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#43     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#44     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#45     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#46     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#47     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#48     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#49     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#50     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#51     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#52     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#53     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#54     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#55     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#56     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#57     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#58     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#59     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#60     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#61     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#62     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#63     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#64     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#65     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#66     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#67     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#68     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#69     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#70     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#71     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#72     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#73     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#74     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#75     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#76     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#77     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#78     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#79     StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#80     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#81     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#82     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#83     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#84     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#85     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#86     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#87     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#88     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#89     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#90     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#91     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#92     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#93     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#94     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#95     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#96     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#97     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#98     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#99     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#100    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#101    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#102    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#103    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#104    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#105    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#106    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#107    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#108    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#109    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#110    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#111    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#112    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#113    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#114    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#115    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#116    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#117    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#118    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#119    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#120    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#121    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#122    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#123    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#124    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#125    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#126    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#127    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#128    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#129    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#130    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#131    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#132    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#133    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#134    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#135    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#136    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#137    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#138    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#139    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#140    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#141    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#142    Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#143    MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#144    _ViewportElement.update (package:flutter/src/widgets/viewport.dart:293:11)
#145    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#146    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#147    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#148    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#149    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#150    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#151    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#152    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#153    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#154    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#155    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#156    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#157    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#158    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#159    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#160    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#161    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#162    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#163    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#164    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#165    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#166    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#167    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#168    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#169    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#170    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#171    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#172    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#173    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#174    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#175    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#176    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#177    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#178    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#179    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#180    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#181    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#182    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#183    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#184    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#185    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#186    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#187    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#188    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#189    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#190    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#191    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#192    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#193    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#194    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#195    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#196    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#197    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#198    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#199    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#200    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#201    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#202    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#203    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#204    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#205    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#206    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#207    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#208    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#209    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#210    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#211    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#212    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#213    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#214    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#215    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#216    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#217    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#218    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#219    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#220    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#221    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#222    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#223    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#224    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#225    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#226    Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#227    MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#228    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#229    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#230    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#231    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#232    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#233    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#234    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#235    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#236    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#237    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#238    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#239    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#240    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#241    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#242    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#243    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#244    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#245    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#246    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#247    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#248    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#249    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#250    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#251    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#252    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#253    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#254    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#255    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#256    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#257    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#258    BuildScope._tryRebuild (package:flutter/src/widgets/framework.dart:2750:15)
#259    BuildScope._flushDirtyElements (package:flutter/src/widgets/framework.dart:2807:11)
#260    BuildOwner.buildScope (package:flutter/src/widgets/framework.dart:3111:18)
#261    WidgetsBinding.drawFrame (package:flutter/src/widgets/binding.dart:1571:21)
#262    RendererBinding._handlePersistentFrameCallback (package:flutter/src/rendering/binding.dart:509:5)
#263    SchedulerBinding._invokeFrameCallback (package:flutter/src/scheduler/binding.dart:1430:15)
#264    SchedulerBinding.handleDrawFrame (package:flutter/src/scheduler/binding.dart:1345:9)
#265    SchedulerBinding._handleDrawFrame (package:flutter/src/scheduler/binding.dart:1198:5)
#266    _rootRun (dart:async/zone_root.dart:35:13)
#267    _CustomZone.run (dart:async/zone.dart:726:19)
#268    _CustomZone.runGuarded (dart:async/zone.dart:625:7)
#269    _invoke (dart:ui/hooks.dart:425:10)
#270    PlatformDispatcher._drawFrame (dart:ui/platform_dispatcher.dart:447:5)
#271    _drawFrame (dart:ui/hooks.dart:395:31)

16:08:42.779207 ERROR [widgets library] Null check operator used on a null value

Null check operator used on a null value

#0      _TrainingDayItemState.build (package:testapp/features/calendar_page/presentation/widgets/day_details/training_day_item.dart:56:43)
#1      StatefulElement.build (package:flutter/src/widgets/framework.dart:5931:27)
#2      ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5817:15)
#3      StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#4      Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#5      StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#6      Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#7      SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#8      Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#9      SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#10     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#11     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#12     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#13     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#14     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#15     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#16     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#17     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#18     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#19     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#20     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#21     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#22     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#23     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#24     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#25     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#26     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#27     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#28     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#29     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#30     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#31     StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#32     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#33     SliverMultiBoxAdaptorElement.updateChild (package:flutter/src/widgets/sliver.dart:1086:37)
#34     SliverMultiBoxAdaptorElement.performRebuild.processElement (package:flutter/src/widgets/sliver.dart:979:35)
#35     Iterable.forEach (dart:core/iterable.dart:366:35)
#36     SliverMultiBoxAdaptorElement.performRebuild (package:flutter/src/widgets/sliver.dart:1032:24)
#37     SliverMultiBoxAdaptorElement.update (package:flutter/src/widgets/sliver.dart:955:7)
#38     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#39     Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#40     MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#41     _ViewportElement.update (package:flutter/src/widgets/viewport.dart:293:11)
#42     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#43     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#44     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#45     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#46     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#47     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#48     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#49     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#50     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#51     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#52     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#53     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#54     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#55     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#56     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#57     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#58     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#59     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#60     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#61     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#62     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#63     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#64     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#65     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#66     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#67     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#68     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#69     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#70     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#71     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#72     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#73     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#74     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#75     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#76     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#77     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#78     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#79     StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#80     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#81     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#82     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#83     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#84     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#85     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#86     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#87     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#88     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#89     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#90     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#91     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#92     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#93     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#94     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#95     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#96     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#97     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#98     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#99     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#100    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#101    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#102    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#103    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#104    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#105    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#106    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#107    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#108    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#109    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#110    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#111    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#112    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#113    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#114    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#115    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#116    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#117    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#118    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#119    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#120    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#121    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#122    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#123    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#124    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#125    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#126    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#127    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#128    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#129    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#130    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#131    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#132    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#133    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#134    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#135    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#136    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#137    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#138    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#139    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#140    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#141    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#142    Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#143    MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#144    _ViewportElement.update (package:flutter/src/widgets/viewport.dart:293:11)
#145    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#146    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#147    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#148    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#149    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#150    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#151    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#152    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#153    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#154    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#155    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#156    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#157    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#158    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#159    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#160    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#161    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#162    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#163    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#164    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#165    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#166    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#167    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#168    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#169    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#170    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#171    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#172    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#173    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#174    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#175    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#176    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#177    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#178    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#179    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#180    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#181    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#182    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#183    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#184    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#185    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#186    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#187    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#188    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#189    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#190    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#191    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#192    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#193    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#194    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#195    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#196    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#197    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#198    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#199    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#200    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#201    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#202    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#203    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#204    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#205    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#206    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#207    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#208    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#209    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#210    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#211    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#212    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#213    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#214    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#215    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#216    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#217    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#218    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#219    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#220    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#221    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#222    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#223    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#224    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#225    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#226    Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#227    MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#228    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#229    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#230    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#231    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#232    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#233    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#234    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#235    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#236    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#237    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#238    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#239    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#240    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#241    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#242    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#243    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#244    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#245    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#246    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#247    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#248    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#249    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#250    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#251    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#252    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#253    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#254    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#255    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#256    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#257    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#258    BuildScope._tryRebuild (package:flutter/src/widgets/framework.dart:2750:15)
#259    BuildScope._flushDirtyElements (package:flutter/src/widgets/framework.dart:2807:11)
#260    BuildOwner.buildScope (package:flutter/src/widgets/framework.dart:3111:18)
#261    WidgetsBinding.drawFrame (package:flutter/src/widgets/binding.dart:1571:21)
#262    RendererBinding._handlePersistentFrameCallback (package:flutter/src/rendering/binding.dart:509:5)
#263    SchedulerBinding._invokeFrameCallback (package:flutter/src/scheduler/binding.dart:1430:15)
#264    SchedulerBinding.handleDrawFrame (package:flutter/src/scheduler/binding.dart:1345:9)
#265    SchedulerBinding._handleDrawFrame (package:flutter/src/scheduler/binding.dart:1198:5)
#266    _rootRun (dart:async/zone_root.dart:35:13)
#267    _CustomZone.run (dart:async/zone.dart:726:19)
#268    _CustomZone.runGuarded (dart:async/zone.dart:625:7)
#269    _invoke (dart:ui/hooks.dart:425:10)
#270    PlatformDispatcher._drawFrame (dart:ui/platform_dispatcher.dart:447:5)
#271    _drawFrame (dart:ui/hooks.dart:395:31)

16:08:42.812121 ERROR [widgets library] Null check operator used on a null value

Null check operator used on a null value

#0      _TrainingDayItemState.build (package:testapp/features/calendar_page/presentation/widgets/day_details/training_day_item.dart:56:43)
#1      StatefulElement.build (package:flutter/src/widgets/framework.dart:5931:27)
#2      ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5817:15)
#3      StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#4      Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#5      StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#6      Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#7      SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#8      Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#9      SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#10     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#11     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#12     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#13     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#14     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#15     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#16     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#17     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#18     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#19     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#20     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#21     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#22     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#23     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#24     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#25     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#26     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#27     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#28     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#29     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#30     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#31     StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#32     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#33     SliverMultiBoxAdaptorElement.updateChild (package:flutter/src/widgets/sliver.dart:1086:37)
#34     SliverMultiBoxAdaptorElement.performRebuild.processElement (package:flutter/src/widgets/sliver.dart:979:35)
#35     Iterable.forEach (dart:core/iterable.dart:366:35)
#36     SliverMultiBoxAdaptorElement.performRebuild (package:flutter/src/widgets/sliver.dart:1032:24)
#37     SliverMultiBoxAdaptorElement.update (package:flutter/src/widgets/sliver.dart:955:7)
#38     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#39     Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#40     MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#41     _ViewportElement.update (package:flutter/src/widgets/viewport.dart:293:11)
#42     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#43     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#44     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#45     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#46     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#47     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#48     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#49     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#50     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#51     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#52     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#53     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#54     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#55     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#56     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#57     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#58     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#59     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#60     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#61     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#62     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#63     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#64     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#65     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#66     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#67     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#68     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#69     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#70     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#71     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#72     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#73     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#74     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#75     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#76     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#77     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#78     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#79     StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#80     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#81     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#82     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#83     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#84     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#85     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#86     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#87     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#88     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#89     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#90     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#91     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#92     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#93     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#94     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#95     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#96     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#97     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#98     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#99     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#100    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#101    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#102    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#103    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#104    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#105    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#106    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#107    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#108    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#109    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#110    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#111    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#112    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#113    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#114    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#115    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#116    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#117    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#118    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#119    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#120    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#121    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#122    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#123    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#124    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#125    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#126    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#127    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#128    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#129    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#130    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#131    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#132    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#133    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#134    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#135    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#136    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#137    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#138    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#139    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#140    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#141    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#142    Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#143    MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#144    _ViewportElement.update (package:flutter/src/widgets/viewport.dart:293:11)
#145    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#146    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#147    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#148    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#149    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#150    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#151    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#152    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#153    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#154    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#155    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#156    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#157    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#158    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#159    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#160    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#161    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#162    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#163    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#164    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#165    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#166    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#167    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#168    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#169    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#170    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#171    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#172    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#173    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#174    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#175    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#176    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#177    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#178    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#179    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#180    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#181    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#182    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#183    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#184    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#185    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#186    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#187    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#188    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#189    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#190    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#191    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#192    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#193    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#194    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#195    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#196    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#197    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#198    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#199    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#200    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#201    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#202    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#203    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#204    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#205    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#206    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#207    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#208    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#209    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#210    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#211    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#212    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#213    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#214    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#215    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#216    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#217    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#218    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#219    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#220    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#221    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#222    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#223    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#224    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#225    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#226    Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#227    MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#228    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#229    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#230    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#231    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#232    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#233    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#234    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#235    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#236    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#237    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#238    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#239    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#240    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#241    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#242    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#243    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#244    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#245    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#246    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#247    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#248    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#249    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#250    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#251    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#252    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#253    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#254    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#255    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#256    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#257    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#258    BuildScope._tryRebuild (package:flutter/src/widgets/framework.dart:2750:15)
#259    BuildScope._flushDirtyElements (package:flutter/src/widgets/framework.dart:2807:11)
#260    BuildOwner.buildScope (package:flutter/src/widgets/framework.dart:3111:18)
#261    WidgetsBinding.drawFrame (package:flutter/src/widgets/binding.dart:1571:21)
#262    RendererBinding._handlePersistentFrameCallback (package:flutter/src/rendering/binding.dart:509:5)
#263    SchedulerBinding._invokeFrameCallback (package:flutter/src/scheduler/binding.dart:1430:15)
#264    SchedulerBinding.handleDrawFrame (package:flutter/src/scheduler/binding.dart:1345:9)
#265    SchedulerBinding._handleDrawFrame (package:flutter/src/scheduler/binding.dart:1198:5)
#266    _rootRun (dart:async/zone_root.dart:35:13)
#267    _CustomZone.run (dart:async/zone.dart:726:19)
#268    _CustomZone.runGuarded (dart:async/zone.dart:625:7)
#269    _invoke (dart:ui/hooks.dart:425:10)
#270    PlatformDispatcher._drawFrame (dart:ui/platform_dispatcher.dart:447:5)
#271    _drawFrame (dart:ui/hooks.dart:395:31)

16:08:42.847696 ERROR [widgets library] Null check operator used on a null value

Null check operator used on a null value

#0      _TrainingDayItemState.build (package:testapp/features/calendar_page/presentation/widgets/day_details/training_day_item.dart:56:43)
#1      StatefulElement.build (package:flutter/src/widgets/framework.dart:5931:27)
#2      ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5817:15)
#3      StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#4      Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#5      StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#6      Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#7      SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#8      Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#9      SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#10     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#11     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#12     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#13     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#14     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#15     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#16     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#17     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#18     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#19     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#20     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#21     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#22     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#23     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#24     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#25     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#26     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#27     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#28     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#29     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#30     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#31     StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#32     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#33     SliverMultiBoxAdaptorElement.updateChild (package:flutter/src/widgets/sliver.dart:1086:37)
#34     SliverMultiBoxAdaptorElement.performRebuild.processElement (package:flutter/src/widgets/sliver.dart:979:35)
#35     Iterable.forEach (dart:core/iterable.dart:366:35)
#36     SliverMultiBoxAdaptorElement.performRebuild (package:flutter/src/widgets/sliver.dart:1032:24)
#37     SliverMultiBoxAdaptorElement.update (package:flutter/src/widgets/sliver.dart:955:7)
#38     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#39     Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#40     MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#41     _ViewportElement.update (package:flutter/src/widgets/viewport.dart:293:11)
#42     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#43     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#44     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#45     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#46     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#47     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#48     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#49     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#50     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#51     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#52     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#53     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#54     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#55     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#56     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#57     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#58     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#59     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#60     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#61     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#62     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#63     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#64     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#65     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#66     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#67     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#68     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#69     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#70     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#71     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#72     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#73     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#74     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#75     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#76     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#77     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#78     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#79     StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#80     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#81     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#82     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#83     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#84     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#85     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#86     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#87     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#88     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#89     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#90     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#91     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#92     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#93     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#94     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#95     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#96     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#97     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#98     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#99     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#100    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#101    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#102    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#103    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#104    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#105    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#106    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#107    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#108    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#109    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#110    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#111    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#112    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#113    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#114    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#115    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#116    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#117    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#118    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#119    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#120    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#121    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#122    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#123    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#124    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#125    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#126    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#127    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#128    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#129    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#130    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#131    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#132    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#133    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#134    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#135    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#136    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#137    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#138    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#139    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#140    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#141    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#142    Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#143    MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#144    _ViewportElement.update (package:flutter/src/widgets/viewport.dart:293:11)
#145    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#146    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#147    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#148    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#149    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#150    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#151    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#152    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#153    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#154    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#155    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#156    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#157    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#158    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#159    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#160    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#161    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#162    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#163    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#164    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#165    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#166    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#167    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#168    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#169    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#170    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#171    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#172    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#173    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#174    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#175    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#176    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#177    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#178    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#179    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#180    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#181    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#182    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#183    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#184    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#185    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#186    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#187    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#188    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#189    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#190    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#191    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#192    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#193    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#194    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#195    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#196    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#197    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#198    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#199    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#200    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#201    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#202    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#203    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#204    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#205    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#206    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#207    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#208    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#209    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#210    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#211    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#212    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#213    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#214    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#215    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#216    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#217    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#218    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#219    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#220    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#221    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#222    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#223    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#224    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#225    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#226    Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#227    MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#228    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#229    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#230    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#231    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#232    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#233    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#234    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#235    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#236    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#237    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#238    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#239    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#240    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#241    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#242    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#243    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#244    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#245    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#246    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#247    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#248    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#249    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#250    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#251    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#252    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#253    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#254    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#255    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#256    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#257    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#258    BuildScope._tryRebuild (package:flutter/src/widgets/framework.dart:2750:15)
#259    BuildScope._flushDirtyElements (package:flutter/src/widgets/framework.dart:2807:11)
#260    BuildOwner.buildScope (package:flutter/src/widgets/framework.dart:3111:18)
#261    WidgetsBinding.drawFrame (package:flutter/src/widgets/binding.dart:1571:21)
#262    RendererBinding._handlePersistentFrameCallback (package:flutter/src/rendering/binding.dart:509:5)
#263    SchedulerBinding._invokeFrameCallback (package:flutter/src/scheduler/binding.dart:1430:15)
#264    SchedulerBinding.handleDrawFrame (package:flutter/src/scheduler/binding.dart:1345:9)
#265    SchedulerBinding._handleDrawFrame (package:flutter/src/scheduler/binding.dart:1198:5)
#266    _rootRun (dart:async/zone_root.dart:35:13)
#267    _CustomZone.run (dart:async/zone.dart:726:19)
#268    _CustomZone.runGuarded (dart:async/zone.dart:625:7)
#269    _invoke (dart:ui/hooks.dart:425:10)
#270    PlatformDispatcher._drawFrame (dart:ui/platform_dispatcher.dart:447:5)
#271    _drawFrame (dart:ui/hooks.dart:395:31)

16:08:42.879672 ERROR [widgets library] Null check operator used on a null value

Null check operator used on a null value

#0      _TrainingDayItemState.build (package:testapp/features/calendar_page/presentation/widgets/day_details/training_day_item.dart:56:43)
#1      StatefulElement.build (package:flutter/src/widgets/framework.dart:5931:27)
#2      ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5817:15)
#3      StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#4      Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#5      StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#6      Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#7      SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#8      Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#9      SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#10     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#11     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#12     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#13     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#14     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#15     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#16     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#17     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#18     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#19     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#20     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#21     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#22     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#23     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#24     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#25     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#26     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#27     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#28     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#29     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#30     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#31     StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#32     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#33     SliverMultiBoxAdaptorElement.updateChild (package:flutter/src/widgets/sliver.dart:1086:37)
#34     SliverMultiBoxAdaptorElement.performRebuild.processElement (package:flutter/src/widgets/sliver.dart:979:35)
#35     Iterable.forEach (dart:core/iterable.dart:366:35)
#36     SliverMultiBoxAdaptorElement.performRebuild (package:flutter/src/widgets/sliver.dart:1032:24)
#37     SliverMultiBoxAdaptorElement.update (package:flutter/src/widgets/sliver.dart:955:7)
#38     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#39     Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#40     MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#41     _ViewportElement.update (package:flutter/src/widgets/viewport.dart:293:11)
#42     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#43     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#44     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#45     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#46     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#47     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#48     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#49     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#50     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#51     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#52     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#53     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#54     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#55     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#56     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#57     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#58     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#59     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#60     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#61     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#62     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#63     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#64     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#65     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#66     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#67     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#68     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#69     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#70     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#71     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#72     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#73     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#74     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#75     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#76     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#77     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#78     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#79     StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#80     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#81     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#82     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#83     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#84     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#85     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#86     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#87     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#88     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#89     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#90     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#91     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#92     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#93     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#94     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#95     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#96     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#97     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#98     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#99     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#100    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#101    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#102    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#103    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#104    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#105    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#106    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#107    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#108    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#109    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#110    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#111    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#112    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#113    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#114    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#115    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#116    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#117    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#118    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#119    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#120    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#121    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#122    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#123    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#124    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#125    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#126    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#127    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#128    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#129    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#130    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#131    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#132    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#133    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#134    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#135    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#136    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#137    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#138    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#139    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#140    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#141    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#142    Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#143    MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#144    _ViewportElement.update (package:flutter/src/widgets/viewport.dart:293:11)
#145    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#146    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#147    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#148    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#149    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#150    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#151    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#152    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#153    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#154    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#155    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#156    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#157    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#158    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#159    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#160    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#161    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#162    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#163    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#164    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#165    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#166    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#167    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#168    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#169    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#170    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#171    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#172    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#173    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#174    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#175    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#176    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#177    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#178    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#179    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#180    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#181    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#182    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#183    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#184    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#185    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#186    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#187    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#188    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#189    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#190    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#191    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#192    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#193    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#194    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#195    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#196    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#197    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#198    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#199    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#200    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#201    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#202    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#203    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#204    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#205    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#206    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#207    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#208    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#209    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#210    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#211    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#212    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#213    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#214    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#215    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#216    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#217    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#218    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#219    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#220    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#221    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#222    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#223    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#224    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#225    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#226    Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#227    MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#228    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#229    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#230    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#231    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#232    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#233    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#234    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#235    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#236    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#237    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#238    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#239    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#240    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#241    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#242    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#243    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#244    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#245    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#246    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#247    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#248    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#249    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#250    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#251    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#252    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#253    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#254    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#255    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#256    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#257    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#258    BuildScope._tryRebuild (package:flutter/src/widgets/framework.dart:2750:15)
#259    BuildScope._flushDirtyElements (package:flutter/src/widgets/framework.dart:2807:11)
#260    BuildOwner.buildScope (package:flutter/src/widgets/framework.dart:3111:18)
#261    WidgetsBinding.drawFrame (package:flutter/src/widgets/binding.dart:1571:21)
#262    RendererBinding._handlePersistentFrameCallback (package:flutter/src/rendering/binding.dart:509:5)
#263    SchedulerBinding._invokeFrameCallback (package:flutter/src/scheduler/binding.dart:1430:15)
#264    SchedulerBinding.handleDrawFrame (package:flutter/src/scheduler/binding.dart:1345:9)
#265    SchedulerBinding._handleDrawFrame (package:flutter/src/scheduler/binding.dart:1198:5)
#266    _rootRun (dart:async/zone_root.dart:35:13)
#267    _CustomZone.run (dart:async/zone.dart:726:19)
#268    _CustomZone.runGuarded (dart:async/zone.dart:625:7)
#269    _invoke (dart:ui/hooks.dart:425:10)
#270    PlatformDispatcher._drawFrame (dart:ui/platform_dispatcher.dart:447:5)
#271    _drawFrame (dart:ui/hooks.dart:395:31)

16:08:42.920984 ERROR [widgets library] Null check operator used on a null value

Null check operator used on a null value

#0      _TrainingDayItemState.build (package:testapp/features/calendar_page/presentation/widgets/day_details/training_day_item.dart:56:43)
#1      StatefulElement.build (package:flutter/src/widgets/framework.dart:5931:27)
#2      ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5817:15)
#3      StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#4      Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#5      StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#6      Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#7      SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#8      Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#9      SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#10     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#11     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#12     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#13     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#14     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#15     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#16     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#17     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#18     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#19     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#20     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#21     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#22     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#23     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#24     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#25     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#26     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#27     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#28     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#29     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#30     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#31     StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#32     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#33     SliverMultiBoxAdaptorElement.updateChild (package:flutter/src/widgets/sliver.dart:1086:37)
#34     SliverMultiBoxAdaptorElement.performRebuild.processElement (package:flutter/src/widgets/sliver.dart:979:35)
#35     Iterable.forEach (dart:core/iterable.dart:366:35)
#36     SliverMultiBoxAdaptorElement.performRebuild (package:flutter/src/widgets/sliver.dart:1032:24)
#37     SliverMultiBoxAdaptorElement.update (package:flutter/src/widgets/sliver.dart:955:7)
#38     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#39     Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#40     MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#41     _ViewportElement.update (package:flutter/src/widgets/viewport.dart:293:11)
#42     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#43     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#44     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#45     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#46     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#47     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#48     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#49     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#50     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#51     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#52     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#53     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#54     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#55     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#56     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#57     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#58     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#59     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#60     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#61     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#62     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#63     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#64     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#65     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#66     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#67     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#68     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#69     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#70     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#71     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#72     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#73     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#74     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#75     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#76     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#77     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#78     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#79     StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#80     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#81     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#82     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#83     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#84     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#85     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#86     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#87     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#88     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#89     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#90     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#91     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#92     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#93     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#94     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#95     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#96     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#97     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#98     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#99     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#100    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#101    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#102    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#103    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#104    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#105    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#106    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#107    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#108    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#109    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#110    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#111    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#112    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#113    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#114    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#115    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#116    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#117    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#118    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#119    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#120    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#121    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#122    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#123    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#124    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#125    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#126    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#127    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#128    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#129    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#130    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#131    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#132    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#133    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#134    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#135    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#136    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#137    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#138    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#139    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#140    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#141    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#142    Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#143    MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#144    _ViewportElement.update (package:flutter/src/widgets/viewport.dart:293:11)
#145    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#146    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#147    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#148    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#149    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#150    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#151    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#152    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#153    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#154    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#155    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#156    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#157    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#158    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#159    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#160    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#161    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#162    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#163    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#164    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#165    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#166    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#167    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#168    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#169    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#170    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#171    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#172    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#173    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#174    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#175    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#176    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#177    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#178    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#179    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#180    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#181    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#182    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#183    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#184    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#185    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#186    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#187    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#188    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#189    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#190    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#191    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#192    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#193    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#194    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#195    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#196    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#197    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#198    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#199    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#200    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#201    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#202    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#203    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#204    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#205    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#206    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#207    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#208    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#209    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#210    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#211    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#212    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#213    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#214    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#215    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#216    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#217    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#218    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#219    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#220    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#221    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#222    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#223    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#224    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#225    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#226    Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#227    MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#228    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#229    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#230    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#231    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#232    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#233    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#234    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#235    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#236    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#237    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#238    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#239    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#240    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#241    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#242    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#243    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#244    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#245    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#246    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#247    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#248    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#249    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#250    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#251    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#252    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#253    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#254    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#255    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#256    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#257    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#258    BuildScope._tryRebuild (package:flutter/src/widgets/framework.dart:2750:15)
#259    BuildScope._flushDirtyElements (package:flutter/src/widgets/framework.dart:2807:11)
#260    BuildOwner.buildScope (package:flutter/src/widgets/framework.dart:3111:18)
#261    WidgetsBinding.drawFrame (package:flutter/src/widgets/binding.dart:1571:21)
#262    RendererBinding._handlePersistentFrameCallback (package:flutter/src/rendering/binding.dart:509:5)
#263    SchedulerBinding._invokeFrameCallback (package:flutter/src/scheduler/binding.dart:1430:15)
#264    SchedulerBinding.handleDrawFrame (package:flutter/src/scheduler/binding.dart:1345:9)
#265    SchedulerBinding._handleDrawFrame (package:flutter/src/scheduler/binding.dart:1198:5)
#266    _rootRun (dart:async/zone_root.dart:35:13)
#267    _CustomZone.run (dart:async/zone.dart:726:19)
#268    _CustomZone.runGuarded (dart:async/zone.dart:625:7)
#269    _invoke (dart:ui/hooks.dart:425:10)
#270    PlatformDispatcher._drawFrame (dart:ui/platform_dispatcher.dart:447:5)
#271    _drawFrame (dart:ui/hooks.dart:395:31)

16:08:42.949819 ERROR [widgets library] Null check operator used on a null value

Null check operator used on a null value

#0      _TrainingDayItemState.build (package:testapp/features/calendar_page/presentation/widgets/day_details/training_day_item.dart:56:43)
#1      StatefulElement.build (package:flutter/src/widgets/framework.dart:5931:27)
#2      ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5817:15)
#3      StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#4      Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#5      StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#6      Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#7      SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#8      Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#9      SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#10     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#11     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#12     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#13     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#14     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#15     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#16     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#17     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#18     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#19     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#20     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#21     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#22     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#23     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#24     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#25     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#26     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#27     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#28     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#29     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#30     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#31     StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#32     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#33     SliverMultiBoxAdaptorElement.updateChild (package:flutter/src/widgets/sliver.dart:1086:37)
#34     SliverMultiBoxAdaptorElement.performRebuild.processElement (package:flutter/src/widgets/sliver.dart:979:35)
#35     Iterable.forEach (dart:core/iterable.dart:366:35)
#36     SliverMultiBoxAdaptorElement.performRebuild (package:flutter/src/widgets/sliver.dart:1032:24)
#37     SliverMultiBoxAdaptorElement.update (package:flutter/src/widgets/sliver.dart:955:7)
#38     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#39     Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#40     MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#41     _ViewportElement.update (package:flutter/src/widgets/viewport.dart:293:11)
#42     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#43     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#44     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#45     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#46     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#47     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#48     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#49     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#50     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#51     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#52     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#53     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#54     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#55     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#56     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#57     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#58     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#59     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#60     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#61     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#62     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#63     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#64     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#65     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#66     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#67     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#68     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#69     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#70     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#71     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#72     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#73     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#74     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#75     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#76     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#77     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#78     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#79     StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#80     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#81     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#82     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#83     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#84     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#85     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#86     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#87     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#88     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#89     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#90     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#91     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#92     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#93     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#94     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#95     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#96     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#97     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#98     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#99     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#100    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#101    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#102    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#103    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#104    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#105    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#106    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#107    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#108    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#109    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#110    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#111    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#112    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#113    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#114    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#115    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#116    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#117    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#118    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#119    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#120    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#121    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#122    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#123    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#124    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#125    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#126    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#127    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#128    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#129    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#130    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#131    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#132    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#133    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#134    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#135    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#136    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#137    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#138    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#139    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#140    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#141    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#142    Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#143    MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#144    _ViewportElement.update (package:flutter/src/widgets/viewport.dart:293:11)
#145    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#146    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#147    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#148    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#149    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#150    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#151    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#152    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#153    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#154    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#155    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#156    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#157    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#158    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#159    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#160    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#161    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#162    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#163    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#164    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#165    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#166    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#167    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#168    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#169    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#170    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#171    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#172    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#173    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#174    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#175    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#176    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#177    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#178    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#179    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#180    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#181    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#182    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#183    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#184    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#185    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#186    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#187    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#188    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#189    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#190    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#191    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#192    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#193    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#194    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#195    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#196    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#197    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#198    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#199    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#200    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#201    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#202    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#203    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#204    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#205    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#206    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#207    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#208    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#209    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#210    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#211    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#212    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#213    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#214    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#215    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#216    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#217    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#218    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#219    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#220    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#221    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#222    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#223    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#224    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#225    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#226    Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#227    MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#228    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#229    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#230    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#231    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#232    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#233    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#234    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#235    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#236    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#237    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#238    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#239    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#240    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#241    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#242    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#243    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#244    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#245    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#246    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#247    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#248    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#249    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#250    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#251    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#252    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#253    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#254    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#255    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#256    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#257    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#258    BuildScope._tryRebuild (package:flutter/src/widgets/framework.dart:2750:15)
#259    BuildScope._flushDirtyElements (package:flutter/src/widgets/framework.dart:2807:11)
#260    BuildOwner.buildScope (package:flutter/src/widgets/framework.dart:3111:18)
#261    WidgetsBinding.drawFrame (package:flutter/src/widgets/binding.dart:1571:21)
#262    RendererBinding._handlePersistentFrameCallback (package:flutter/src/rendering/binding.dart:509:5)
#263    SchedulerBinding._invokeFrameCallback (package:flutter/src/scheduler/binding.dart:1430:15)
#264    SchedulerBinding.handleDrawFrame (package:flutter/src/scheduler/binding.dart:1345:9)
#265    SchedulerBinding._handleDrawFrame (package:flutter/src/scheduler/binding.dart:1198:5)
#266    _rootRun (dart:async/zone_root.dart:35:13)
#267    _CustomZone.run (dart:async/zone.dart:726:19)
#268    _CustomZone.runGuarded (dart:async/zone.dart:625:7)
#269    _invoke (dart:ui/hooks.dart:425:10)
#270    PlatformDispatcher._drawFrame (dart:ui/platform_dispatcher.dart:447:5)
#271    _drawFrame (dart:ui/hooks.dart:395:31)

16:08:42.988821 ERROR [widgets library] Null check operator used on a null value

Null check operator used on a null value

#0      _TrainingDayItemState.build (package:testapp/features/calendar_page/presentation/widgets/day_details/training_day_item.dart:56:43)
#1      StatefulElement.build (package:flutter/src/widgets/framework.dart:5931:27)
#2      ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5817:15)
#3      StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#4      Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#5      StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#6      Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#7      SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#8      Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#9      SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#10     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#11     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#12     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#13     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#14     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#15     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#16     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#17     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#18     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#19     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#20     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#21     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#22     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#23     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#24     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#25     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#26     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#27     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#28     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#29     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#30     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#31     StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#32     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#33     SliverMultiBoxAdaptorElement.updateChild (package:flutter/src/widgets/sliver.dart:1086:37)
#34     SliverMultiBoxAdaptorElement.performRebuild.processElement (package:flutter/src/widgets/sliver.dart:979:35)
#35     Iterable.forEach (dart:core/iterable.dart:366:35)
#36     SliverMultiBoxAdaptorElement.performRebuild (package:flutter/src/widgets/sliver.dart:1032:24)
#37     SliverMultiBoxAdaptorElement.update (package:flutter/src/widgets/sliver.dart:955:7)
#38     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#39     Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#40     MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#41     _ViewportElement.update (package:flutter/src/widgets/viewport.dart:293:11)
#42     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#43     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#44     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#45     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#46     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#47     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#48     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#49     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#50     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#51     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#52     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#53     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#54     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#55     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#56     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#57     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#58     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#59     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#60     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#61     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#62     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#63     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#64     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#65     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#66     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#67     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#68     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#69     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#70     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#71     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#72     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#73     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#74     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#75     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#76     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#77     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#78     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#79     StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#80     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#81     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#82     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#83     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#84     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#85     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#86     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#87     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#88     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#89     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#90     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#91     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#92     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#93     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#94     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#95     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#96     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#97     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#98     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#99     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#100    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#101    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#102    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#103    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#104    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#105    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#106    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#107    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#108    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#109    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#110    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#111    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#112    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#113    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#114    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#115    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#116    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#117    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#118    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#119    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#120    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#121    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#122    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#123    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#124    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#125    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#126    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#127    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#128    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#129    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#130    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#131    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#132    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#133    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#134    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#135    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#136    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#137    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#138    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#139    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#140    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#141    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#142    Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#143    MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#144    _ViewportElement.update (package:flutter/src/widgets/viewport.dart:293:11)
#145    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#146    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#147    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#148    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#149    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#150    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#151    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#152    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#153    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#154    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#155    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#156    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#157    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#158    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#159    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#160    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#161    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#162    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#163    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#164    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#165    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#166    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#167    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#168    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#169    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#170    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#171    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#172    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#173    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#174    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#175    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#176    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#177    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#178    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#179    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#180    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#181    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#182    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#183    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#184    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#185    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#186    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#187    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#188    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#189    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#190    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#191    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#192    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#193    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#194    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#195    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#196    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#197    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#198    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#199    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#200    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#201    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#202    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#203    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#204    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#205    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#206    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#207    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#208    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#209    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#210    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#211    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#212    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#213    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#214    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#215    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#216    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#217    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#218    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#219    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#220    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#221    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#222    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#223    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#224    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#225    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#226    Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#227    MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#228    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#229    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#230    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#231    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#232    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#233    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#234    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#235    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#236    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#237    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#238    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#239    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#240    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#241    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#242    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#243    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#244    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#245    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#246    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#247    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#248    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#249    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#250    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#251    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#252    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#253    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#254    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#255    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#256    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#257    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#258    BuildScope._tryRebuild (package:flutter/src/widgets/framework.dart:2750:15)
#259    BuildScope._flushDirtyElements (package:flutter/src/widgets/framework.dart:2807:11)
#260    BuildOwner.buildScope (package:flutter/src/widgets/framework.dart:3111:18)
#261    WidgetsBinding.drawFrame (package:flutter/src/widgets/binding.dart:1571:21)
#262    RendererBinding._handlePersistentFrameCallback (package:flutter/src/rendering/binding.dart:509:5)
#263    SchedulerBinding._invokeFrameCallback (package:flutter/src/scheduler/binding.dart:1430:15)
#264    SchedulerBinding.handleDrawFrame (package:flutter/src/scheduler/binding.dart:1345:9)
#265    SchedulerBinding._handleDrawFrame (package:flutter/src/scheduler/binding.dart:1198:5)
#266    _rootRun (dart:async/zone_root.dart:35:13)
#267    _CustomZone.run (dart:async/zone.dart:726:19)
#268    _CustomZone.runGuarded (dart:async/zone.dart:625:7)
#269    _invoke (dart:ui/hooks.dart:425:10)
#270    PlatformDispatcher._drawFrame (dart:ui/platform_dispatcher.dart:447:5)
#271    _drawFrame (dart:ui/hooks.dart:395:31)

16:08:43.028896 ERROR [widgets library] Null check operator used on a null value

Null check operator used on a null value

#0      _TrainingDayItemState.build (package:testapp/features/calendar_page/presentation/widgets/day_details/training_day_item.dart:56:43)
#1      StatefulElement.build (package:flutter/src/widgets/framework.dart:5931:27)
#2      ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5817:15)
#3      StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#4      Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#5      StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#6      Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#7      SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#8      Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#9      SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#10     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#11     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#12     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#13     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#14     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#15     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#16     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#17     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#18     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#19     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#20     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#21     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#22     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#23     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#24     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#25     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#26     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#27     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#28     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#29     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#30     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#31     StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#32     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#33     SliverMultiBoxAdaptorElement.updateChild (package:flutter/src/widgets/sliver.dart:1086:37)
#34     SliverMultiBoxAdaptorElement.performRebuild.processElement (package:flutter/src/widgets/sliver.dart:979:35)
#35     Iterable.forEach (dart:core/iterable.dart:366:35)
#36     SliverMultiBoxAdaptorElement.performRebuild (package:flutter/src/widgets/sliver.dart:1032:24)
#37     SliverMultiBoxAdaptorElement.update (package:flutter/src/widgets/sliver.dart:955:7)
#38     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#39     Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#40     MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#41     _ViewportElement.update (package:flutter/src/widgets/viewport.dart:293:11)
#42     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#43     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#44     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#45     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#46     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#47     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#48     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#49     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#50     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#51     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#52     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#53     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#54     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#55     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#56     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#57     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#58     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#59     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#60     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#61     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#62     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#63     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#64     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#65     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#66     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#67     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#68     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#69     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#70     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#71     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#72     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#73     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#74     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#75     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#76     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#77     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#78     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#79     StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#80     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#81     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#82     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#83     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#84     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#85     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#86     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#87     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#88     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#89     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#90     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#91     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#92     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#93     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#94     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#95     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#96     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#97     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#98     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#99     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#100    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#101    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#102    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#103    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#104    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#105    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#106    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#107    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#108    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#109    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#110    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#111    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#112    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#113    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#114    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#115    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#116    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#117    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#118    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#119    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#120    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#121    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#122    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#123    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#124    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#125    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#126    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#127    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#128    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#129    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#130    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#131    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#132    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#133    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#134    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#135    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#136    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#137    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#138    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#139    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#140    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#141    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#142    Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#143    MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#144    _ViewportElement.update (package:flutter/src/widgets/viewport.dart:293:11)
#145    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#146    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#147    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#148    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#149    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#150    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#151    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#152    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#153    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#154    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#155    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#156    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#157    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#158    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#159    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#160    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#161    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#162    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#163    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#164    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#165    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#166    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#167    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#168    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#169    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#170    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#171    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#172    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#173    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#174    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#175    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#176    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#177    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#178    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#179    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#180    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#181    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#182    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#183    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#184    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#185    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#186    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#187    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#188    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#189    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#190    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#191    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#192    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#193    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#194    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#195    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#196    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#197    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#198    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#199    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#200    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#201    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#202    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#203    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#204    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#205    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#206    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#207    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#208    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#209    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#210    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#211    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#212    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#213    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#214    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#215    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#216    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#217    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#218    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#219    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#220    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#221    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#222    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#223    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#224    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#225    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#226    Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#227    MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#228    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#229    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#230    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#231    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#232    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#233    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#234    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#235    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#236    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#237    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#238    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#239    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#240    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#241    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#242    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#243    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#244    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#245    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#246    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#247    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#248    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#249    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#250    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#251    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#252    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#253    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#254    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#255    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#256    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#257    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#258    BuildScope._tryRebuild (package:flutter/src/widgets/framework.dart:2750:15)
#259    BuildScope._flushDirtyElements (package:flutter/src/widgets/framework.dart:2807:11)
#260    BuildOwner.buildScope (package:flutter/src/widgets/framework.dart:3111:18)
#261    WidgetsBinding.drawFrame (package:flutter/src/widgets/binding.dart:1571:21)
#262    RendererBinding._handlePersistentFrameCallback (package:flutter/src/rendering/binding.dart:509:5)
#263    SchedulerBinding._invokeFrameCallback (package:flutter/src/scheduler/binding.dart:1430:15)
#264    SchedulerBinding.handleDrawFrame (package:flutter/src/scheduler/binding.dart:1345:9)
#265    SchedulerBinding._handleDrawFrame (package:flutter/src/scheduler/binding.dart:1198:5)
#266    _rootRun (dart:async/zone_root.dart:35:13)
#267    _CustomZone.run (dart:async/zone.dart:726:19)
#268    _CustomZone.runGuarded (dart:async/zone.dart:625:7)
#269    _invoke (dart:ui/hooks.dart:425:10)
#270    PlatformDispatcher._drawFrame (dart:ui/platform_dispatcher.dart:447:5)
#271    _drawFrame (dart:ui/hooks.dart:395:31)

16:08:43.057868 ERROR [widgets library] Null check operator used on a null value

Null check operator used on a null value

#0      _TrainingDayItemState.build (package:testapp/features/calendar_page/presentation/widgets/day_details/training_day_item.dart:56:43)
#1      StatefulElement.build (package:flutter/src/widgets/framework.dart:5931:27)
#2      ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5817:15)
#3      StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#4      Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#5      StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#6      Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#7      SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#8      Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#9      SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#10     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#11     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#12     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#13     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#14     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#15     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#16     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#17     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#18     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#19     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#20     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#21     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#22     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#23     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#24     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#25     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#26     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#27     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#28     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#29     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#30     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#31     StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#32     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#33     SliverMultiBoxAdaptorElement.updateChild (package:flutter/src/widgets/sliver.dart:1086:37)
#34     SliverMultiBoxAdaptorElement.performRebuild.processElement (package:flutter/src/widgets/sliver.dart:979:35)
#35     Iterable.forEach (dart:core/iterable.dart:366:35)
#36     SliverMultiBoxAdaptorElement.performRebuild (package:flutter/src/widgets/sliver.dart:1032:24)
#37     SliverMultiBoxAdaptorElement.update (package:flutter/src/widgets/sliver.dart:955:7)
#38     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#39     Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#40     MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#41     _ViewportElement.update (package:flutter/src/widgets/viewport.dart:293:11)
#42     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#43     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#44     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#45     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#46     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#47     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#48     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#49     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#50     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#51     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#52     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#53     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#54     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#55     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#56     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#57     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#58     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#59     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#60     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#61     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#62     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#63     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#64     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#65     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#66     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#67     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#68     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#69     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#70     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#71     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#72     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#73     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#74     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#75     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#76     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#77     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#78     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#79     StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#80     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#81     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#82     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#83     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#84     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#85     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#86     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#87     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#88     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#89     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#90     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#91     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#92     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#93     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#94     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#95     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#96     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#97     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#98     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#99     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#100    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#101    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#102    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#103    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#104    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#105    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#106    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#107    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#108    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#109    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#110    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#111    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#112    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#113    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#114    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#115    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#116    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#117    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#118    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#119    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#120    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#121    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#122    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#123    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#124    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#125    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#126    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#127    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#128    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#129    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#130    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#131    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#132    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#133    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#134    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#135    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#136    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#137    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#138    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#139    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#140    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#141    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#142    Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#143    MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#144    _ViewportElement.update (package:flutter/src/widgets/viewport.dart:293:11)
#145    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#146    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#147    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#148    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#149    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#150    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#151    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#152    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#153    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#154    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#155    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#156    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#157    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#158    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#159    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#160    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#161    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#162    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#163    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#164    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#165    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#166    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#167    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#168    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#169    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#170    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#171    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#172    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#173    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#174    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#175    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#176    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#177    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#178    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#179    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#180    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#181    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#182    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#183    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#184    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#185    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#186    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#187    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#188    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#189    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#190    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#191    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#192    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#193    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#194    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#195    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#196    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#197    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#198    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#199    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#200    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#201    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#202    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#203    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#204    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#205    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#206    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#207    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#208    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#209    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#210    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#211    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#212    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#213    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#214    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#215    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#216    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#217    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#218    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#219    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#220    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#221    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#222    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#223    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#224    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#225    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#226    Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#227    MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#228    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#229    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#230    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#231    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#232    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#233    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#234    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#235    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#236    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#237    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#238    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#239    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#240    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#241    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#242    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#243    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#244    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#245    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#246    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#247    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#248    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#249    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#250    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#251    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#252    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#253    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#254    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#255    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#256    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#257    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#258    BuildScope._tryRebuild (package:flutter/src/widgets/framework.dart:2750:15)
#259    BuildScope._flushDirtyElements (package:flutter/src/widgets/framework.dart:2807:11)
#260    BuildOwner.buildScope (package:flutter/src/widgets/framework.dart:3111:18)
#261    WidgetsBinding.drawFrame (package:flutter/src/widgets/binding.dart:1571:21)
#262    RendererBinding._handlePersistentFrameCallback (package:flutter/src/rendering/binding.dart:509:5)
#263    SchedulerBinding._invokeFrameCallback (package:flutter/src/scheduler/binding.dart:1430:15)
#264    SchedulerBinding.handleDrawFrame (package:flutter/src/scheduler/binding.dart:1345:9)
#265    SchedulerBinding._handleDrawFrame (package:flutter/src/scheduler/binding.dart:1198:5)
#266    _rootRun (dart:async/zone_root.dart:35:13)
#267    _CustomZone.run (dart:async/zone.dart:726:19)
#268    _CustomZone.runGuarded (dart:async/zone.dart:625:7)
#269    _invoke (dart:ui/hooks.dart:425:10)
#270    PlatformDispatcher._drawFrame (dart:ui/platform_dispatcher.dart:447:5)
#271    _drawFrame (dart:ui/hooks.dart:395:31)

16:08:43.083209 ERROR [widgets library] Null check operator used on a null value

Null check operator used on a null value

#0      _TrainingDayItemState.build (package:testapp/features/calendar_page/presentation/widgets/day_details/training_day_item.dart:56:43)
#1      StatefulElement.build (package:flutter/src/widgets/framework.dart:5931:27)
#2      ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5817:15)
#3      StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#4      Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#5      StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#6      Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#7      SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#8      Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#9      SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#10     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#11     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#12     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#13     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#14     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#15     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#16     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#17     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#18     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#19     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#20     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#21     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#22     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#23     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#24     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#25     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#26     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#27     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#28     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#29     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#30     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#31     StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#32     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#33     SliverMultiBoxAdaptorElement.updateChild (package:flutter/src/widgets/sliver.dart:1086:37)
#34     SliverMultiBoxAdaptorElement.performRebuild.processElement (package:flutter/src/widgets/sliver.dart:979:35)
#35     Iterable.forEach (dart:core/iterable.dart:366:35)
#36     SliverMultiBoxAdaptorElement.performRebuild (package:flutter/src/widgets/sliver.dart:1032:24)
#37     SliverMultiBoxAdaptorElement.update (package:flutter/src/widgets/sliver.dart:955:7)
#38     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#39     Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#40     MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#41     _ViewportElement.update (package:flutter/src/widgets/viewport.dart:293:11)
#42     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#43     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#44     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#45     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#46     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#47     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#48     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#49     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#50     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#51     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#52     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#53     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#54     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#55     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#56     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#57     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#58     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#59     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#60     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#61     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#62     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#63     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#64     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#65     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#66     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#67     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#68     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#69     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#70     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#71     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#72     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#73     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#74     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#75     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#76     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#77     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#78     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#79     StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#80     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#81     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#82     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#83     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#84     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#85     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#86     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#87     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#88     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#89     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#90     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#91     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#92     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#93     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#94     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#95     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#96     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#97     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#98     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#99     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#100    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#101    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#102    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#103    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#104    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#105    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#106    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#107    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#108    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#109    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#110    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#111    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#112    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#113    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#114    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#115    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#116    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#117    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#118    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#119    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#120    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#121    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#122    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#123    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#124    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#125    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#126    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#127    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#128    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#129    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#130    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#131    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#132    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#133    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#134    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#135    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#136    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#137    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#138    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#139    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#140    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#141    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#142    Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#143    MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#144    _ViewportElement.update (package:flutter/src/widgets/viewport.dart:293:11)
#145    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#146    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#147    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#148    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#149    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#150    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#151    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#152    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#153    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#154    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#155    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#156    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#157    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#158    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#159    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#160    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#161    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#162    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#163    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#164    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#165    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#166    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#167    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#168    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#169    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#170    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#171    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#172    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#173    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#174    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#175    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#176    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#177    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#178    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#179    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#180    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#181    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#182    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#183    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#184    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#185    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#186    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#187    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#188    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#189    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#190    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#191    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#192    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#193    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#194    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#195    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#196    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#197    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#198    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#199    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#200    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#201    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#202    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#203    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#204    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#205    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#206    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#207    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#208    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#209    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#210    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#211    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#212    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#213    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#214    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#215    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#216    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#217    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#218    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#219    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#220    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#221    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#222    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#223    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#224    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#225    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#226    Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#227    MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#228    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#229    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#230    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#231    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#232    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#233    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#234    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#235    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#236    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#237    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#238    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#239    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#240    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#241    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#242    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#243    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#244    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#245    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#246    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#247    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#248    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#249    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#250    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#251    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#252    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#253    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#254    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#255    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#256    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#257    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#258    BuildScope._tryRebuild (package:flutter/src/widgets/framework.dart:2750:15)
#259    BuildScope._flushDirtyElements (package:flutter/src/widgets/framework.dart:2807:11)
#260    BuildOwner.buildScope (package:flutter/src/widgets/framework.dart:3111:18)
#261    WidgetsBinding.drawFrame (package:flutter/src/widgets/binding.dart:1571:21)
#262    RendererBinding._handlePersistentFrameCallback (package:flutter/src/rendering/binding.dart:509:5)
#263    SchedulerBinding._invokeFrameCallback (package:flutter/src/scheduler/binding.dart:1430:15)
#264    SchedulerBinding.handleDrawFrame (package:flutter/src/scheduler/binding.dart:1345:9)
#265    SchedulerBinding._handleDrawFrame (package:flutter/src/scheduler/binding.dart:1198:5)
#266    _rootRun (dart:async/zone_root.dart:35:13)
#267    _CustomZone.run (dart:async/zone.dart:726:19)
#268    _CustomZone.runGuarded (dart:async/zone.dart:625:7)
#269    _invoke (dart:ui/hooks.dart:425:10)
#270    PlatformDispatcher._drawFrame (dart:ui/platform_dispatcher.dart:447:5)
#271    _drawFrame (dart:ui/hooks.dart:395:31)

16:08:43.116106 ERROR [widgets library] Null check operator used on a null value

Null check operator used on a null value

#0      _TrainingDayItemState.build (package:testapp/features/calendar_page/presentation/widgets/day_details/training_day_item.dart:56:43)
#1      StatefulElement.build (package:flutter/src/widgets/framework.dart:5931:27)
#2      ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5817:15)
#3      StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#4      Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#5      StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#6      Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#7      SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#8      Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#9      SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#10     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#11     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#12     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#13     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#14     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#15     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#16     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#17     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#18     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#19     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#20     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#21     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#22     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#23     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#24     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#25     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#26     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#27     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#28     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#29     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#30     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#31     StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#32     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#33     SliverMultiBoxAdaptorElement.updateChild (package:flutter/src/widgets/sliver.dart:1086:37)
#34     SliverMultiBoxAdaptorElement.performRebuild.processElement (package:flutter/src/widgets/sliver.dart:979:35)
#35     Iterable.forEach (dart:core/iterable.dart:366:35)
#36     SliverMultiBoxAdaptorElement.performRebuild (package:flutter/src/widgets/sliver.dart:1032:24)
#37     SliverMultiBoxAdaptorElement.update (package:flutter/src/widgets/sliver.dart:955:7)
#38     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#39     Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#40     MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#41     _ViewportElement.update (package:flutter/src/widgets/viewport.dart:293:11)
#42     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#43     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#44     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#45     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#46     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#47     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#48     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#49     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#50     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#51     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#52     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#53     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#54     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#55     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#56     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#57     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#58     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#59     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#60     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#61     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#62     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#63     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#64     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#65     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#66     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#67     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#68     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#69     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#70     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#71     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#72     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#73     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#74     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#75     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#76     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#77     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#78     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#79     StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#80     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#81     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#82     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#83     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#84     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#85     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#86     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#87     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#88     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#89     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#90     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#91     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#92     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#93     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#94     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#95     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#96     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#97     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#98     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#99     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#100    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#101    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#102    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#103    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#104    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#105    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#106    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#107    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#108    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#109    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#110    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#111    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#112    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#113    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#114    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#115    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#116    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#117    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#118    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#119    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#120    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#121    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#122    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#123    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#124    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#125    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#126    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#127    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#128    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#129    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#130    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#131    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#132    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#133    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#134    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#135    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#136    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#137    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#138    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#139    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#140    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#141    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#142    Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#143    MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#144    _ViewportElement.update (package:flutter/src/widgets/viewport.dart:293:11)
#145    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#146    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#147    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#148    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#149    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#150    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#151    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#152    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#153    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#154    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#155    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#156    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#157    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#158    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#159    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#160    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#161    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#162    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#163    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#164    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#165    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#166    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#167    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#168    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#169    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#170    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#171    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#172    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#173    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#174    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#175    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#176    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#177    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#178    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#179    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#180    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#181    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#182    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#183    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#184    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#185    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#186    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#187    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#188    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#189    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#190    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#191    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#192    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#193    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#194    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#195    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#196    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#197    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#198    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#199    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#200    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#201    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#202    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#203    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#204    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#205    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#206    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#207    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#208    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#209    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#210    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#211    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#212    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#213    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#214    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#215    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#216    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#217    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#218    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#219    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#220    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#221    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#222    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#223    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#224    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#225    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#226    Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#227    MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#228    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#229    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#230    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#231    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#232    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#233    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#234    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#235    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#236    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#237    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#238    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#239    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#240    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#241    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#242    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#243    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#244    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#245    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#246    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#247    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#248    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#249    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#250    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#251    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#252    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#253    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#254    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#255    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#256    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#257    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#258    BuildScope._tryRebuild (package:flutter/src/widgets/framework.dart:2750:15)
#259    BuildScope._flushDirtyElements (package:flutter/src/widgets/framework.dart:2807:11)
#260    BuildOwner.buildScope (package:flutter/src/widgets/framework.dart:3111:18)
#261    WidgetsBinding.drawFrame (package:flutter/src/widgets/binding.dart:1571:21)
#262    RendererBinding._handlePersistentFrameCallback (package:flutter/src/rendering/binding.dart:509:5)
#263    SchedulerBinding._invokeFrameCallback (package:flutter/src/scheduler/binding.dart:1430:15)
#264    SchedulerBinding.handleDrawFrame (package:flutter/src/scheduler/binding.dart:1345:9)
#265    SchedulerBinding._handleDrawFrame (package:flutter/src/scheduler/binding.dart:1198:5)
#266    _rootRun (dart:async/zone_root.dart:35:13)
#267    _CustomZone.run (dart:async/zone.dart:726:19)
#268    _CustomZone.runGuarded (dart:async/zone.dart:625:7)
#269    _invoke (dart:ui/hooks.dart:425:10)
#270    PlatformDispatcher._drawFrame (dart:ui/platform_dispatcher.dart:447:5)
#271    _drawFrame (dart:ui/hooks.dart:395:31)

16:08:43.152701 ERROR [widgets library] Null check operator used on a null value

Null check operator used on a null value

#0      _TrainingDayItemState.build (package:testapp/features/calendar_page/presentation/widgets/day_details/training_day_item.dart:56:43)
#1      StatefulElement.build (package:flutter/src/widgets/framework.dart:5931:27)
#2      ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5817:15)
#3      StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#4      Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#5      StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#6      Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#7      SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#8      Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#9      SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#10     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#11     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#12     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#13     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#14     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#15     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#16     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#17     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#18     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#19     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#20     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#21     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#22     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#23     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#24     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#25     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#26     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#27     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#28     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#29     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#30     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#31     StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#32     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#33     SliverMultiBoxAdaptorElement.updateChild (package:flutter/src/widgets/sliver.dart:1086:37)
#34     SliverMultiBoxAdaptorElement.performRebuild.processElement (package:flutter/src/widgets/sliver.dart:979:35)
#35     Iterable.forEach (dart:core/iterable.dart:366:35)
#36     SliverMultiBoxAdaptorElement.performRebuild (package:flutter/src/widgets/sliver.dart:1032:24)
#37     SliverMultiBoxAdaptorElement.update (package:flutter/src/widgets/sliver.dart:955:7)
#38     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#39     Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#40     MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#41     _ViewportElement.update (package:flutter/src/widgets/viewport.dart:293:11)
#42     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#43     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#44     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#45     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#46     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#47     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#48     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#49     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#50     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#51     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#52     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#53     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#54     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#55     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#56     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#57     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#58     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#59     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#60     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#61     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#62     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#63     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#64     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#65     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#66     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#67     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#68     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#69     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#70     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#71     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#72     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#73     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#74     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#75     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#76     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#77     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#78     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#79     StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#80     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#81     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#82     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#83     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#84     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#85     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#86     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#87     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#88     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#89     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#90     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#91     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#92     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#93     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#94     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#95     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#96     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#97     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#98     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#99     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#100    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#101    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#102    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#103    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#104    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#105    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#106    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#107    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#108    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#109    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#110    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#111    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#112    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#113    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#114    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#115    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#116    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#117    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#118    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#119    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#120    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#121    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#122    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#123    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#124    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#125    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#126    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#127    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#128    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#129    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#130    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#131    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#132    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#133    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#134    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#135    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#136    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#137    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#138    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#139    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#140    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#141    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#142    Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#143    MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#144    _ViewportElement.update (package:flutter/src/widgets/viewport.dart:293:11)
#145    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#146    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#147    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#148    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#149    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#150    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#151    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#152    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#153    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#154    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#155    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#156    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#157    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#158    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#159    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#160    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#161    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#162    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#163    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#164    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#165    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#166    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#167    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#168    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#169    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#170    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#171    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#172    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#173    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#174    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#175    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#176    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#177    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#178    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#179    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#180    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#181    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#182    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#183    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#184    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#185    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#186    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#187    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#188    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#189    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#190    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#191    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#192    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#193    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#194    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#195    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#196    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#197    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#198    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#199    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#200    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#201    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#202    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#203    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#204    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#205    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#206    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#207    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#208    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#209    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#210    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#211    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#212    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#213    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#214    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#215    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#216    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#217    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#218    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#219    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#220    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#221    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#222    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#223    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#224    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#225    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#226    Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#227    MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#228    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#229    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#230    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#231    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#232    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#233    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#234    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#235    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#236    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#237    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#238    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#239    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#240    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#241    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#242    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#243    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#244    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#245    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#246    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#247    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#248    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#249    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#250    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#251    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#252    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#253    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#254    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#255    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#256    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#257    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#258    BuildScope._tryRebuild (package:flutter/src/widgets/framework.dart:2750:15)
#259    BuildScope._flushDirtyElements (package:flutter/src/widgets/framework.dart:2807:11)
#260    BuildOwner.buildScope (package:flutter/src/widgets/framework.dart:3111:18)
#261    WidgetsBinding.drawFrame (package:flutter/src/widgets/binding.dart:1571:21)
#262    RendererBinding._handlePersistentFrameCallback (package:flutter/src/rendering/binding.dart:509:5)
#263    SchedulerBinding._invokeFrameCallback (package:flutter/src/scheduler/binding.dart:1430:15)
#264    SchedulerBinding.handleDrawFrame (package:flutter/src/scheduler/binding.dart:1345:9)
#265    SchedulerBinding._handleDrawFrame (package:flutter/src/scheduler/binding.dart:1198:5)
#266    _rootRun (dart:async/zone_root.dart:35:13)
#267    _CustomZone.run (dart:async/zone.dart:726:19)
#268    _CustomZone.runGuarded (dart:async/zone.dart:625:7)
#269    _invoke (dart:ui/hooks.dart:425:10)
#270    PlatformDispatcher._drawFrame (dart:ui/platform_dispatcher.dart:447:5)
#271    _drawFrame (dart:ui/hooks.dart:395:31)

16:08:43.202171 ERROR [widgets library] Null check operator used on a null value

Null check operator used on a null value

#0      _TrainingDayItemState.build (package:testapp/features/calendar_page/presentation/widgets/day_details/training_day_item.dart:56:43)
#1      StatefulElement.build (package:flutter/src/widgets/framework.dart:5931:27)
#2      ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5817:15)
#3      StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#4      Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#5      StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#6      Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#7      SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#8      Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#9      SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#10     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#11     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#12     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#13     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#14     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#15     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#16     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#17     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#18     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#19     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#20     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#21     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#22     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#23     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#24     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#25     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#26     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#27     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#28     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#29     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#30     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#31     StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#32     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#33     SliverMultiBoxAdaptorElement.updateChild (package:flutter/src/widgets/sliver.dart:1086:37)
#34     SliverMultiBoxAdaptorElement.performRebuild.processElement (package:flutter/src/widgets/sliver.dart:979:35)
#35     Iterable.forEach (dart:core/iterable.dart:366:35)
#36     SliverMultiBoxAdaptorElement.performRebuild (package:flutter/src/widgets/sliver.dart:1032:24)
#37     SliverMultiBoxAdaptorElement.update (package:flutter/src/widgets/sliver.dart:955:7)
#38     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#39     Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#40     MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#41     _ViewportElement.update (package:flutter/src/widgets/viewport.dart:293:11)
#42     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#43     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#44     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#45     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#46     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#47     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#48     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#49     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#50     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#51     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#52     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#53     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#54     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#55     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#56     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#57     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#58     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#59     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#60     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#61     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#62     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#63     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#64     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#65     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#66     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#67     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#68     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#69     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#70     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#71     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#72     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#73     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#74     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#75     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#76     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#77     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#78     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#79     StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#80     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#81     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#82     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#83     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#84     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#85     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#86     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#87     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#88     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#89     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#90     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#91     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#92     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#93     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#94     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#95     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#96     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#97     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#98     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#99     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#100    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#101    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#102    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#103    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#104    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#105    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#106    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#107    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#108    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#109    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#110    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#111    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#112    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#113    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#114    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#115    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#116    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#117    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#118    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#119    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#120    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#121    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#122    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#123    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#124    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#125    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#126    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#127    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#128    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#129    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#130    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#131    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#132    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#133    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#134    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#135    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#136    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#137    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#138    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#139    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#140    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#141    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#142    Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#143    MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#144    _ViewportElement.update (package:flutter/src/widgets/viewport.dart:293:11)
#145    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#146    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#147    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#148    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#149    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#150    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#151    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#152    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#153    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#154    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#155    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#156    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#157    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#158    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#159    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#160    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#161    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#162    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#163    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#164    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#165    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#166    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#167    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#168    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#169    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#170    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#171    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#172    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#173    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#174    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#175    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#176    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#177    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#178    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#179    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#180    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#181    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#182    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#183    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#184    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#185    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#186    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#187    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#188    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#189    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#190    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#191    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#192    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#193    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#194    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#195    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#196    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#197    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#198    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#199    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#200    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#201    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#202    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#203    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#204    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#205    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#206    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#207    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#208    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#209    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#210    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#211    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#212    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#213    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#214    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#215    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#216    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#217    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#218    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#219    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#220    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#221    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#222    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#223    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#224    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#225    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#226    Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#227    MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#228    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#229    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#230    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#231    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#232    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#233    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#234    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#235    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#236    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#237    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#238    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#239    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#240    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#241    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#242    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#243    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#244    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#245    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#246    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#247    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#248    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#249    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#250    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#251    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#252    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#253    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#254    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#255    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#256    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#257    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#258    BuildScope._tryRebuild (package:flutter/src/widgets/framework.dart:2750:15)
#259    BuildScope._flushDirtyElements (package:flutter/src/widgets/framework.dart:2807:11)
#260    BuildOwner.buildScope (package:flutter/src/widgets/framework.dart:3111:18)
#261    WidgetsBinding.drawFrame (package:flutter/src/widgets/binding.dart:1571:21)
#262    RendererBinding._handlePersistentFrameCallback (package:flutter/src/rendering/binding.dart:509:5)
#263    SchedulerBinding._invokeFrameCallback (package:flutter/src/scheduler/binding.dart:1430:15)
#264    SchedulerBinding.handleDrawFrame (package:flutter/src/scheduler/binding.dart:1345:9)
#265    SchedulerBinding._handleDrawFrame (package:flutter/src/scheduler/binding.dart:1198:5)
#266    _rootRun (dart:async/zone_root.dart:35:13)
#267    _CustomZone.run (dart:async/zone.dart:726:19)
#268    _CustomZone.runGuarded (dart:async/zone.dart:625:7)
#269    _invoke (dart:ui/hooks.dart:425:10)
#270    PlatformDispatcher._drawFrame (dart:ui/platform_dispatcher.dart:447:5)
#271    _drawFrame (dart:ui/hooks.dart:395:31)

16:08:43.854007 ERROR [widgets library] Null check operator used on a null value

Null check operator used on a null value

#0      _TrainingDayItemState.build (package:testapp/features/calendar_page/presentation/widgets/day_details/training_day_item.dart:56:43)
#1      StatefulElement.build (package:flutter/src/widgets/framework.dart:5931:27)
#2      ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5817:15)
#3      StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#4      Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#5      StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#6      Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#7      SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#8      Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#9      SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#10     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#11     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#12     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#13     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#14     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#15     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#16     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#17     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#18     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#19     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#20     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#21     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#22     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#23     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#24     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#25     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#26     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#27     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#28     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#29     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#30     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#31     StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#32     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#33     SliverMultiBoxAdaptorElement.updateChild (package:flutter/src/widgets/sliver.dart:1086:37)
#34     SliverMultiBoxAdaptorElement.performRebuild.processElement (package:flutter/src/widgets/sliver.dart:979:35)
#35     Iterable.forEach (dart:core/iterable.dart:366:35)
#36     SliverMultiBoxAdaptorElement.performRebuild (package:flutter/src/widgets/sliver.dart:1032:24)
#37     SliverMultiBoxAdaptorElement.update (package:flutter/src/widgets/sliver.dart:955:7)
#38     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#39     Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#40     MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#41     _ViewportElement.update (package:flutter/src/widgets/viewport.dart:293:11)
#42     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#43     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#44     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#45     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#46     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#47     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#48     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#49     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#50     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#51     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#52     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#53     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#54     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#55     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#56     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#57     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#58     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#59     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#60     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#61     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#62     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#63     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#64     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#65     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#66     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#67     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#68     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#69     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#70     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#71     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#72     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#73     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#74     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#75     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#76     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#77     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#78     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#79     StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#80     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#81     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#82     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#83     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#84     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#85     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#86     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#87     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#88     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#89     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#90     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#91     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#92     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#93     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#94     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#95     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#96     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#97     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#98     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#99     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#100    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#101    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#102    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#103    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#104    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#105    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#106    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#107    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#108    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#109    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#110    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#111    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#112    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#113    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#114    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#115    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#116    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#117    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#118    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#119    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#120    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#121    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#122    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#123    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#124    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#125    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#126    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#127    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#128    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#129    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#130    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#131    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#132    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#133    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#134    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#135    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#136    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#137    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#138    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#139    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#140    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#141    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#142    Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#143    MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#144    _ViewportElement.update (package:flutter/src/widgets/viewport.dart:293:11)
#145    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#146    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#147    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#148    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#149    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#150    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#151    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#152    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#153    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#154    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#155    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#156    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#157    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#158    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#159    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#160    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#161    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#162    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#163    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#164    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#165    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#166    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#167    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#168    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#169    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#170    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#171    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#172    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#173    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#174    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#175    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#176    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#177    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#178    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#179    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#180    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#181    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#182    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#183    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#184    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#185    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#186    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#187    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#188    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#189    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#190    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#191    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#192    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#193    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#194    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#195    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#196    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#197    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#198    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#199    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#200    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#201    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#202    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#203    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#204    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#205    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#206    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#207    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#208    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#209    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#210    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#211    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#212    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#213    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#214    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#215    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#216    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#217    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#218    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#219    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#220    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#221    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#222    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#223    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#224    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#225    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#226    Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#227    MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#228    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#229    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#230    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#231    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#232    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#233    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#234    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#235    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#236    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#237    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#238    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#239    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#240    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#241    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#242    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#243    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#244    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#245    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#246    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#247    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#248    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#249    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#250    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#251    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#252    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#253    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#254    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#255    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#256    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#257    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#258    BuildScope._tryRebuild (package:flutter/src/widgets/framework.dart:2750:15)
#259    BuildScope._flushDirtyElements (package:flutter/src/widgets/framework.dart:2807:11)
#260    BuildOwner.buildScope (package:flutter/src/widgets/framework.dart:3111:18)
#261    WidgetsBinding.drawFrame (package:flutter/src/widgets/binding.dart:1571:21)
#262    RendererBinding._handlePersistentFrameCallback (package:flutter/src/rendering/binding.dart:509:5)
#263    SchedulerBinding._invokeFrameCallback (package:flutter/src/scheduler/binding.dart:1430:15)
#264    SchedulerBinding.handleDrawFrame (package:flutter/src/scheduler/binding.dart:1345:9)
#265    SchedulerBinding._handleDrawFrame (package:flutter/src/scheduler/binding.dart:1198:5)
#266    _rootRun (dart:async/zone_root.dart:35:13)
#267    _CustomZone.run (dart:async/zone.dart:726:19)
#268    _CustomZone.runGuarded (dart:async/zone.dart:625:7)
#269    _invoke (dart:ui/hooks.dart:425:10)
#270    PlatformDispatcher._drawFrame (dart:ui/platform_dispatcher.dart:447:5)
#271    _drawFrame (dart:ui/hooks.dart:395:31)

16:08:43.887234 ERROR [widgets library] Null check operator used on a null value

Null check operator used on a null value

#0      _TrainingDayItemState.build (package:testapp/features/calendar_page/presentation/widgets/day_details/training_day_item.dart:56:43)
#1      StatefulElement.build (package:flutter/src/widgets/framework.dart:5931:27)
#2      ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5817:15)
#3      StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#4      Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#5      StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#6      Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#7      SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#8      Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#9      SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#10     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#11     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#12     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#13     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#14     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#15     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#16     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#17     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#18     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#19     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#20     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#21     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#22     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#23     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#24     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#25     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#26     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#27     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#28     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#29     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#30     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#31     StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#32     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#33     SliverMultiBoxAdaptorElement.updateChild (package:flutter/src/widgets/sliver.dart:1086:37)
#34     SliverMultiBoxAdaptorElement.performRebuild.processElement (package:flutter/src/widgets/sliver.dart:979:35)
#35     Iterable.forEach (dart:core/iterable.dart:366:35)
#36     SliverMultiBoxAdaptorElement.performRebuild (package:flutter/src/widgets/sliver.dart:1032:24)
#37     SliverMultiBoxAdaptorElement.update (package:flutter/src/widgets/sliver.dart:955:7)
#38     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#39     Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#40     MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#41     _ViewportElement.update (package:flutter/src/widgets/viewport.dart:293:11)
#42     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#43     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#44     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#45     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#46     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#47     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#48     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#49     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#50     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#51     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#52     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#53     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#54     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#55     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#56     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#57     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#58     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#59     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#60     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#61     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#62     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#63     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#64     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#65     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#66     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#67     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#68     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#69     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#70     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#71     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#72     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#73     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#74     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#75     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#76     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#77     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#78     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#79     StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#80     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#81     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#82     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#83     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#84     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#85     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#86     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#87     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#88     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#89     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#90     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#91     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#92     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#93     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#94     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#95     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#96     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#97     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#98     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#99     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#100    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#101    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#102    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#103    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#104    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#105    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#106    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#107    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#108    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#109    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#110    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#111    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#112    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#113    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#114    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#115    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#116    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#117    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#118    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#119    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#120    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#121    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#122    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#123    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#124    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#125    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#126    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#127    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#128    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#129    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#130    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#131    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#132    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#133    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#134    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#135    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#136    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#137    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#138    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#139    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#140    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#141    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#142    Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#143    MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#144    _ViewportElement.update (package:flutter/src/widgets/viewport.dart:293:11)
#145    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#146    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#147    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#148    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#149    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#150    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#151    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#152    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#153    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#154    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#155    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#156    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#157    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#158    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#159    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#160    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#161    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#162    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#163    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#164    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#165    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#166    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#167    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#168    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#169    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#170    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#171    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#172    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#173    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#174    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#175    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#176    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#177    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#178    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#179    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#180    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#181    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#182    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#183    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#184    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#185    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#186    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#187    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#188    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#189    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#190    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#191    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#192    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#193    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#194    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#195    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#196    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#197    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#198    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#199    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#200    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#201    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#202    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#203    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#204    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#205    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#206    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#207    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#208    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#209    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#210    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#211    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#212    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#213    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#214    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#215    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#216    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#217    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#218    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#219    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#220    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#221    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#222    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#223    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#224    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#225    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#226    Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#227    MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#228    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#229    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#230    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#231    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#232    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#233    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#234    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#235    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#236    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#237    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#238    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#239    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#240    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#241    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#242    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#243    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#244    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#245    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#246    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#247    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#248    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#249    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#250    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#251    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#252    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#253    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#254    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#255    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#256    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#257    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#258    BuildScope._tryRebuild (package:flutter/src/widgets/framework.dart:2750:15)
#259    BuildScope._flushDirtyElements (package:flutter/src/widgets/framework.dart:2807:11)
#260    BuildOwner.buildScope (package:flutter/src/widgets/framework.dart:3111:18)
#261    WidgetsBinding.drawFrame (package:flutter/src/widgets/binding.dart:1571:21)
#262    RendererBinding._handlePersistentFrameCallback (package:flutter/src/rendering/binding.dart:509:5)
#263    SchedulerBinding._invokeFrameCallback (package:flutter/src/scheduler/binding.dart:1430:15)
#264    SchedulerBinding.handleDrawFrame (package:flutter/src/scheduler/binding.dart:1345:9)
#265    SchedulerBinding._handleDrawFrame (package:flutter/src/scheduler/binding.dart:1198:5)
#266    _rootRun (dart:async/zone_root.dart:35:13)
#267    _CustomZone.run (dart:async/zone.dart:726:19)
#268    _CustomZone.runGuarded (dart:async/zone.dart:625:7)
#269    _invoke (dart:ui/hooks.dart:425:10)
#270    PlatformDispatcher._drawFrame (dart:ui/platform_dispatcher.dart:447:5)
#271    _drawFrame (dart:ui/hooks.dart:395:31)

16:08:43.919085 ERROR [widgets library] Null check operator used on a null value

Null check operator used on a null value

#0      _TrainingDayItemState.build (package:testapp/features/calendar_page/presentation/widgets/day_details/training_day_item.dart:56:43)
#1      StatefulElement.build (package:flutter/src/widgets/framework.dart:5931:27)
#2      ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5817:15)
#3      StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#4      Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#5      StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#6      Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#7      SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#8      Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#9      SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#10     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#11     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#12     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#13     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#14     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#15     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#16     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#17     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#18     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#19     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#20     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#21     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#22     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#23     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#24     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#25     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#26     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#27     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#28     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#29     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#30     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#31     StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#32     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#33     SliverMultiBoxAdaptorElement.updateChild (package:flutter/src/widgets/sliver.dart:1086:37)
#34     SliverMultiBoxAdaptorElement.performRebuild.processElement (package:flutter/src/widgets/sliver.dart:979:35)
#35     Iterable.forEach (dart:core/iterable.dart:366:35)
#36     SliverMultiBoxAdaptorElement.performRebuild (package:flutter/src/widgets/sliver.dart:1032:24)
#37     SliverMultiBoxAdaptorElement.update (package:flutter/src/widgets/sliver.dart:955:7)
#38     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#39     Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#40     MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#41     _ViewportElement.update (package:flutter/src/widgets/viewport.dart:293:11)
#42     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#43     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#44     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#45     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#46     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#47     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#48     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#49     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#50     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#51     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#52     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#53     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#54     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#55     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#56     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#57     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#58     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#59     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#60     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#61     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#62     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#63     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#64     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#65     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#66     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#67     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#68     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#69     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#70     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#71     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#72     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#73     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#74     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#75     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#76     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#77     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#78     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#79     StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#80     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#81     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#82     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#83     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#84     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#85     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#86     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#87     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#88     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#89     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#90     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#91     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#92     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#93     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#94     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#95     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#96     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#97     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#98     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#99     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#100    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#101    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#102    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#103    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#104    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#105    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#106    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#107    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#108    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#109    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#110    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#111    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#112    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#113    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#114    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#115    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#116    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#117    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#118    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#119    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#120    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#121    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#122    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#123    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#124    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#125    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#126    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#127    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#128    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#129    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#130    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#131    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#132    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#133    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#134    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#135    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#136    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#137    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#138    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#139    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#140    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#141    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#142    Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#143    MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#144    _ViewportElement.update (package:flutter/src/widgets/viewport.dart:293:11)
#145    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#146    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#147    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#148    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#149    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#150    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#151    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#152    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#153    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#154    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#155    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#156    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#157    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#158    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#159    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#160    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#161    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#162    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#163    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#164    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#165    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#166    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#167    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#168    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#169    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#170    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#171    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#172    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#173    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#174    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#175    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#176    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#177    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#178    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#179    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#180    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#181    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#182    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#183    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#184    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#185    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#186    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#187    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#188    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#189    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#190    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#191    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#192    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#193    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#194    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#195    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#196    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#197    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#198    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#199    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#200    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#201    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#202    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#203    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#204    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#205    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#206    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#207    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#208    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#209    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#210    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#211    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#212    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#213    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#214    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#215    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#216    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#217    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#218    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#219    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#220    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#221    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#222    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#223    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#224    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#225    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#226    Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#227    MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#228    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#229    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#230    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#231    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#232    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#233    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#234    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#235    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#236    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#237    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#238    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#239    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#240    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#241    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#242    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#243    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#244    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#245    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#246    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#247    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#248    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#249    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#250    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#251    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#252    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#253    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#254    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#255    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#256    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#257    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#258    BuildScope._tryRebuild (package:flutter/src/widgets/framework.dart:2750:15)
#259    BuildScope._flushDirtyElements (package:flutter/src/widgets/framework.dart:2807:11)
#260    BuildOwner.buildScope (package:flutter/src/widgets/framework.dart:3111:18)
#261    WidgetsBinding.drawFrame (package:flutter/src/widgets/binding.dart:1571:21)
#262    RendererBinding._handlePersistentFrameCallback (package:flutter/src/rendering/binding.dart:509:5)
#263    SchedulerBinding._invokeFrameCallback (package:flutter/src/scheduler/binding.dart:1430:15)
#264    SchedulerBinding.handleDrawFrame (package:flutter/src/scheduler/binding.dart:1345:9)
#265    SchedulerBinding._handleDrawFrame (package:flutter/src/scheduler/binding.dart:1198:5)
#266    _rootRun (dart:async/zone_root.dart:35:13)
#267    _CustomZone.run (dart:async/zone.dart:726:19)
#268    _CustomZone.runGuarded (dart:async/zone.dart:625:7)
#269    _invoke (dart:ui/hooks.dart:425:10)
#270    PlatformDispatcher._drawFrame (dart:ui/platform_dispatcher.dart:447:5)
#271    _drawFrame (dart:ui/hooks.dart:395:31)

16:08:43.950153 ERROR [widgets library] Null check operator used on a null value

Null check operator used on a null value

#0      _TrainingDayItemState.build (package:testapp/features/calendar_page/presentation/widgets/day_details/training_day_item.dart:56:43)
#1      StatefulElement.build (package:flutter/src/widgets/framework.dart:5931:27)
#2      ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5817:15)
#3      StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#4      Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#5      StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#6      Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#7      SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#8      Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#9      SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#10     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#11     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#12     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#13     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#14     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#15     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#16     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#17     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#18     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#19     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#20     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#21     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#22     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#23     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#24     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#25     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#26     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#27     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#28     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#29     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#30     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#31     StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#32     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#33     SliverMultiBoxAdaptorElement.updateChild (package:flutter/src/widgets/sliver.dart:1086:37)
#34     SliverMultiBoxAdaptorElement.performRebuild.processElement (package:flutter/src/widgets/sliver.dart:979:35)
#35     Iterable.forEach (dart:core/iterable.dart:366:35)
#36     SliverMultiBoxAdaptorElement.performRebuild (package:flutter/src/widgets/sliver.dart:1032:24)
#37     SliverMultiBoxAdaptorElement.update (package:flutter/src/widgets/sliver.dart:955:7)
#38     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#39     Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#40     MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#41     _ViewportElement.update (package:flutter/src/widgets/viewport.dart:293:11)
#42     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#43     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#44     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#45     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#46     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#47     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#48     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#49     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#50     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#51     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#52     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#53     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#54     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#55     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#56     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#57     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#58     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#59     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#60     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#61     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#62     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#63     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#64     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#65     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#66     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#67     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#68     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#69     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#70     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#71     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#72     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#73     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#74     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#75     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#76     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#77     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#78     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#79     StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#80     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#81     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#82     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#83     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#84     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#85     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#86     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#87     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#88     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#89     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#90     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#91     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#92     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#93     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#94     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#95     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#96     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#97     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#98     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#99     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#100    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#101    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#102    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#103    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#104    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#105    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#106    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#107    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#108    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#109    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#110    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#111    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#112    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#113    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#114    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#115    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#116    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#117    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#118    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#119    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#120    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#121    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#122    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#123    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#124    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#125    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#126    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#127    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#128    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#129    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#130    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#131    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#132    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#133    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#134    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#135    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#136    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#137    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#138    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#139    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#140    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#141    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#142    Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#143    MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#144    _ViewportElement.update (package:flutter/src/widgets/viewport.dart:293:11)
#145    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#146    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#147    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#148    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#149    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#150    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#151    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#152    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#153    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#154    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#155    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#156    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#157    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#158    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#159    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#160    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#161    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#162    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#163    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#164    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#165    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#166    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#167    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#168    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#169    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#170    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#171    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#172    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#173    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#174    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#175    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#176    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#177    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#178    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#179    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#180    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#181    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#182    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#183    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#184    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#185    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#186    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#187    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#188    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#189    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#190    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#191    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#192    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#193    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#194    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#195    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#196    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#197    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#198    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#199    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#200    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#201    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#202    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#203    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#204    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#205    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#206    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#207    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#208    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#209    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#210    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#211    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#212    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#213    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#214    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#215    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#216    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#217    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#218    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#219    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#220    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#221    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#222    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#223    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#224    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#225    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#226    Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#227    MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#228    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#229    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#230    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#231    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#232    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#233    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#234    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#235    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#236    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#237    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#238    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#239    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#240    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#241    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#242    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#243    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#244    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#245    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#246    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#247    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#248    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#249    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#250    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#251    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#252    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#253    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#254    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#255    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#256    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#257    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#258    BuildScope._tryRebuild (package:flutter/src/widgets/framework.dart:2750:15)
#259    BuildScope._flushDirtyElements (package:flutter/src/widgets/framework.dart:2807:11)
#260    BuildOwner.buildScope (package:flutter/src/widgets/framework.dart:3111:18)
#261    WidgetsBinding.drawFrame (package:flutter/src/widgets/binding.dart:1571:21)
#262    RendererBinding._handlePersistentFrameCallback (package:flutter/src/rendering/binding.dart:509:5)
#263    SchedulerBinding._invokeFrameCallback (package:flutter/src/scheduler/binding.dart:1430:15)
#264    SchedulerBinding.handleDrawFrame (package:flutter/src/scheduler/binding.dart:1345:9)
#265    SchedulerBinding._handleDrawFrame (package:flutter/src/scheduler/binding.dart:1198:5)
#266    _rootRun (dart:async/zone_root.dart:35:13)
#267    _CustomZone.run (dart:async/zone.dart:726:19)
#268    _CustomZone.runGuarded (dart:async/zone.dart:625:7)
#269    _invoke (dart:ui/hooks.dart:425:10)
#270    PlatformDispatcher._drawFrame (dart:ui/platform_dispatcher.dart:447:5)
#271    _drawFrame (dart:ui/hooks.dart:395:31)

16:08:43.983553 ERROR [widgets library] Null check operator used on a null value

Null check operator used on a null value

#0      _TrainingDayItemState.build (package:testapp/features/calendar_page/presentation/widgets/day_details/training_day_item.dart:56:43)
#1      StatefulElement.build (package:flutter/src/widgets/framework.dart:5931:27)
#2      ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5817:15)
#3      StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#4      Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#5      StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#6      Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#7      SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#8      Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#9      SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#10     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#11     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#12     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#13     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#14     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#15     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#16     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#17     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#18     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#19     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#20     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#21     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#22     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#23     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#24     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#25     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#26     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#27     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#28     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#29     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#30     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#31     StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#32     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#33     SliverMultiBoxAdaptorElement.updateChild (package:flutter/src/widgets/sliver.dart:1086:37)
#34     SliverMultiBoxAdaptorElement.performRebuild.processElement (package:flutter/src/widgets/sliver.dart:979:35)
#35     Iterable.forEach (dart:core/iterable.dart:366:35)
#36     SliverMultiBoxAdaptorElement.performRebuild (package:flutter/src/widgets/sliver.dart:1032:24)
#37     SliverMultiBoxAdaptorElement.update (package:flutter/src/widgets/sliver.dart:955:7)
#38     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#39     Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#40     MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#41     _ViewportElement.update (package:flutter/src/widgets/viewport.dart:293:11)
#42     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#43     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#44     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#45     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#46     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#47     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#48     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#49     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#50     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#51     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#52     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#53     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#54     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#55     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#56     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#57     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#58     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#59     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#60     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#61     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#62     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#63     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#64     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#65     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#66     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#67     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#68     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#69     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#70     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#71     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#72     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#73     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#74     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#75     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#76     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#77     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#78     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#79     StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#80     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#81     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#82     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#83     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#84     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#85     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#86     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#87     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#88     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#89     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#90     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#91     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#92     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#93     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#94     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#95     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#96     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#97     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#98     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#99     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#100    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#101    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#102    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#103    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#104    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#105    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#106    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#107    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#108    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#109    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#110    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#111    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#112    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#113    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#114    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#115    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#116    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#117    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#118    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#119    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#120    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#121    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#122    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#123    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#124    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#125    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#126    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#127    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#128    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#129    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#130    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#131    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#132    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#133    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#134    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#135    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#136    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#137    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#138    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#139    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#140    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#141    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#142    Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#143    MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#144    _ViewportElement.update (package:flutter/src/widgets/viewport.dart:293:11)
#145    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#146    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#147    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#148    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#149    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#150    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#151    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#152    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#153    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#154    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#155    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#156    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#157    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#158    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#159    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#160    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#161    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#162    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#163    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#164    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#165    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#166    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#167    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#168    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#169    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#170    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#171    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#172    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#173    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#174    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#175    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#176    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#177    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#178    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#179    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#180    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#181    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#182    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#183    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#184    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#185    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#186    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#187    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#188    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#189    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#190    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#191    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#192    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#193    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#194    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#195    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#196    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#197    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#198    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#199    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#200    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#201    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#202    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#203    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#204    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#205    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#206    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#207    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#208    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#209    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#210    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#211    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#212    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#213    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#214    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#215    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#216    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#217    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#218    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#219    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#220    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#221    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#222    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#223    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#224    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#225    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#226    Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#227    MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#228    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#229    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#230    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#231    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#232    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#233    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#234    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#235    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#236    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#237    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#238    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#239    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#240    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#241    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#242    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#243    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#244    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#245    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#246    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#247    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#248    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#249    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#250    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#251    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#252    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#253    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#254    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#255    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#256    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#257    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#258    BuildScope._tryRebuild (package:flutter/src/widgets/framework.dart:2750:15)
#259    BuildScope._flushDirtyElements (package:flutter/src/widgets/framework.dart:2807:11)
#260    BuildOwner.buildScope (package:flutter/src/widgets/framework.dart:3111:18)
#261    WidgetsBinding.drawFrame (package:flutter/src/widgets/binding.dart:1571:21)
#262    RendererBinding._handlePersistentFrameCallback (package:flutter/src/rendering/binding.dart:509:5)
#263    SchedulerBinding._invokeFrameCallback (package:flutter/src/scheduler/binding.dart:1430:15)
#264    SchedulerBinding.handleDrawFrame (package:flutter/src/scheduler/binding.dart:1345:9)
#265    SchedulerBinding._handleDrawFrame (package:flutter/src/scheduler/binding.dart:1198:5)
#266    _rootRun (dart:async/zone_root.dart:35:13)
#267    _CustomZone.run (dart:async/zone.dart:726:19)
#268    _CustomZone.runGuarded (dart:async/zone.dart:625:7)
#269    _invoke (dart:ui/hooks.dart:425:10)
#270    PlatformDispatcher._drawFrame (dart:ui/platform_dispatcher.dart:447:5)
#271    _drawFrame (dart:ui/hooks.dart:395:31)

16:08:44.021377 ERROR [widgets library] Null check operator used on a null value

Null check operator used on a null value

#0      _TrainingDayItemState.build (package:testapp/features/calendar_page/presentation/widgets/day_details/training_day_item.dart:56:43)
#1      StatefulElement.build (package:flutter/src/widgets/framework.dart:5931:27)
#2      ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5817:15)
#3      StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#4      Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#5      StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#6      Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#7      SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#8      Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#9      SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#10     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#11     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#12     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#13     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#14     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#15     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#16     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#17     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#18     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#19     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#20     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#21     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#22     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#23     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#24     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#25     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#26     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#27     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#28     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#29     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#30     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#31     StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#32     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#33     SliverMultiBoxAdaptorElement.updateChild (package:flutter/src/widgets/sliver.dart:1086:37)
#34     SliverMultiBoxAdaptorElement.performRebuild.processElement (package:flutter/src/widgets/sliver.dart:979:35)
#35     Iterable.forEach (dart:core/iterable.dart:366:35)
#36     SliverMultiBoxAdaptorElement.performRebuild (package:flutter/src/widgets/sliver.dart:1032:24)
#37     SliverMultiBoxAdaptorElement.update (package:flutter/src/widgets/sliver.dart:955:7)
#38     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#39     Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#40     MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#41     _ViewportElement.update (package:flutter/src/widgets/viewport.dart:293:11)
#42     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#43     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#44     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#45     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#46     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#47     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#48     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#49     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#50     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#51     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#52     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#53     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#54     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#55     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#56     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#57     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#58     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#59     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#60     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#61     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#62     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#63     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#64     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#65     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#66     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#67     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#68     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#69     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#70     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#71     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#72     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#73     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#74     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#75     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#76     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#77     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#78     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#79     StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#80     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#81     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#82     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#83     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#84     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#85     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#86     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#87     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#88     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#89     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#90     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#91     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#92     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#93     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#94     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#95     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#96     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#97     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#98     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#99     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#100    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#101    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#102    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#103    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#104    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#105    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#106    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#107    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#108    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#109    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#110    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#111    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#112    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#113    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#114    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#115    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#116    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#117    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#118    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#119    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#120    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#121    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#122    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#123    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#124    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#125    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#126    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#127    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#128    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#129    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#130    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#131    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#132    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#133    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#134    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#135    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#136    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#137    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#138    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#139    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#140    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#141    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#142    Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#143    MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#144    _ViewportElement.update (package:flutter/src/widgets/viewport.dart:293:11)
#145    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#146    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#147    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#148    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#149    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#150    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#151    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#152    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#153    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#154    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#155    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#156    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#157    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#158    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#159    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#160    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#161    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#162    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#163    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#164    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#165    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#166    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#167    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#168    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#169    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#170    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#171    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#172    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#173    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#174    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#175    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#176    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#177    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#178    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#179    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#180    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#181    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#182    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#183    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#184    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#185    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#186    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#187    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#188    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#189    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#190    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#191    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#192    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#193    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#194    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#195    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#196    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#197    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#198    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#199    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#200    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#201    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#202    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#203    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#204    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#205    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#206    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#207    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#208    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#209    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#210    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#211    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#212    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#213    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#214    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#215    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#216    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#217    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#218    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#219    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#220    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#221    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#222    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#223    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#224    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#225    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#226    Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#227    MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#228    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#229    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#230    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#231    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#232    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#233    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#234    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#235    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#236    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#237    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#238    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#239    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#240    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#241    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#242    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#243    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#244    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#245    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#246    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#247    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#248    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#249    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#250    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#251    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#252    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#253    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#254    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#255    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#256    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#257    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#258    BuildScope._tryRebuild (package:flutter/src/widgets/framework.dart:2750:15)
#259    BuildScope._flushDirtyElements (package:flutter/src/widgets/framework.dart:2807:11)
#260    BuildOwner.buildScope (package:flutter/src/widgets/framework.dart:3111:18)
#261    WidgetsBinding.drawFrame (package:flutter/src/widgets/binding.dart:1571:21)
#262    RendererBinding._handlePersistentFrameCallback (package:flutter/src/rendering/binding.dart:509:5)
#263    SchedulerBinding._invokeFrameCallback (package:flutter/src/scheduler/binding.dart:1430:15)
#264    SchedulerBinding.handleDrawFrame (package:flutter/src/scheduler/binding.dart:1345:9)
#265    SchedulerBinding._handleDrawFrame (package:flutter/src/scheduler/binding.dart:1198:5)
#266    _rootRun (dart:async/zone_root.dart:35:13)
#267    _CustomZone.run (dart:async/zone.dart:726:19)
#268    _CustomZone.runGuarded (dart:async/zone.dart:625:7)
#269    _invoke (dart:ui/hooks.dart:425:10)
#270    PlatformDispatcher._drawFrame (dart:ui/platform_dispatcher.dart:447:5)
#271    _drawFrame (dart:ui/hooks.dart:395:31)

16:08:44.052229 ERROR [widgets library] Null check operator used on a null value

Null check operator used on a null value

#0      _TrainingDayItemState.build (package:testapp/features/calendar_page/presentation/widgets/day_details/training_day_item.dart:56:43)
#1      StatefulElement.build (package:flutter/src/widgets/framework.dart:5931:27)
#2      ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5817:15)
#3      StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#4      Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#5      StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#6      Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#7      SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#8      Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#9      SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#10     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#11     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#12     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#13     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#14     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#15     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#16     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#17     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#18     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#19     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#20     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#21     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#22     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#23     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#24     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#25     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#26     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#27     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#28     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#29     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#30     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#31     StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#32     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#33     SliverMultiBoxAdaptorElement.updateChild (package:flutter/src/widgets/sliver.dart:1086:37)
#34     SliverMultiBoxAdaptorElement.performRebuild.processElement (package:flutter/src/widgets/sliver.dart:979:35)
#35     Iterable.forEach (dart:core/iterable.dart:366:35)
#36     SliverMultiBoxAdaptorElement.performRebuild (package:flutter/src/widgets/sliver.dart:1032:24)
#37     SliverMultiBoxAdaptorElement.update (package:flutter/src/widgets/sliver.dart:955:7)
#38     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#39     Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#40     MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#41     _ViewportElement.update (package:flutter/src/widgets/viewport.dart:293:11)
#42     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#43     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#44     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#45     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#46     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#47     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#48     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#49     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#50     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#51     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#52     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#53     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#54     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#55     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#56     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#57     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#58     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#59     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#60     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#61     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#62     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#63     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#64     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#65     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#66     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#67     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#68     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#69     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#70     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#71     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#72     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#73     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#74     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#75     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#76     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#77     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#78     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#79     StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#80     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#81     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#82     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#83     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#84     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#85     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#86     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#87     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#88     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#89     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#90     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#91     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#92     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#93     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#94     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#95     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#96     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#97     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#98     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#99     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#100    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#101    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#102    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#103    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#104    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#105    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#106    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#107    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#108    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#109    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#110    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#111    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#112    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#113    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#114    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#115    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#116    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#117    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#118    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#119    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#120    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#121    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#122    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#123    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#124    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#125    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#126    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#127    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#128    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#129    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#130    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#131    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#132    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#133    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#134    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#135    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#136    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#137    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#138    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#139    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#140    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#141    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#142    Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#143    MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#144    _ViewportElement.update (package:flutter/src/widgets/viewport.dart:293:11)
#145    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#146    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#147    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#148    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#149    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#150    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#151    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#152    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#153    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#154    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#155    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#156    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#157    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#158    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#159    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#160    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#161    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#162    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#163    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#164    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#165    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#166    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#167    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#168    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#169    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#170    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#171    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#172    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#173    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#174    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#175    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#176    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#177    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#178    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#179    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#180    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#181    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#182    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#183    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#184    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#185    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#186    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#187    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#188    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#189    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#190    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#191    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#192    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#193    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#194    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#195    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#196    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#197    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#198    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#199    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#200    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#201    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#202    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#203    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#204    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#205    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#206    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#207    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#208    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#209    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#210    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#211    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#212    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#213    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#214    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#215    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#216    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#217    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#218    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#219    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#220    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#221    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#222    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#223    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#224    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#225    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#226    Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#227    MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#228    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#229    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#230    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#231    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#232    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#233    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#234    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#235    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#236    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#237    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#238    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#239    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#240    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#241    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#242    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#243    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#244    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#245    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#246    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#247    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#248    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#249    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#250    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#251    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#252    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#253    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#254    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#255    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#256    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#257    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#258    BuildScope._tryRebuild (package:flutter/src/widgets/framework.dart:2750:15)
#259    BuildScope._flushDirtyElements (package:flutter/src/widgets/framework.dart:2807:11)
#260    BuildOwner.buildScope (package:flutter/src/widgets/framework.dart:3111:18)
#261    WidgetsBinding.drawFrame (package:flutter/src/widgets/binding.dart:1571:21)
#262    RendererBinding._handlePersistentFrameCallback (package:flutter/src/rendering/binding.dart:509:5)
#263    SchedulerBinding._invokeFrameCallback (package:flutter/src/scheduler/binding.dart:1430:15)
#264    SchedulerBinding.handleDrawFrame (package:flutter/src/scheduler/binding.dart:1345:9)
#265    SchedulerBinding._handleDrawFrame (package:flutter/src/scheduler/binding.dart:1198:5)
#266    _rootRun (dart:async/zone_root.dart:35:13)
#267    _CustomZone.run (dart:async/zone.dart:726:19)
#268    _CustomZone.runGuarded (dart:async/zone.dart:625:7)
#269    _invoke (dart:ui/hooks.dart:425:10)
#270    PlatformDispatcher._drawFrame (dart:ui/platform_dispatcher.dart:447:5)
#271    _drawFrame (dart:ui/hooks.dart:395:31)

16:08:44.084173 ERROR [widgets library] Null check operator used on a null value

Null check operator used on a null value

#0      _TrainingDayItemState.build (package:testapp/features/calendar_page/presentation/widgets/day_details/training_day_item.dart:56:43)
#1      StatefulElement.build (package:flutter/src/widgets/framework.dart:5931:27)
#2      ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5817:15)
#3      StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#4      Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#5      StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#6      Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#7      SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#8      Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#9      SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#10     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#11     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#12     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#13     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#14     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#15     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#16     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#17     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#18     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#19     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#20     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#21     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#22     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#23     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#24     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#25     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#26     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#27     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#28     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#29     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#30     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#31     StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#32     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#33     SliverMultiBoxAdaptorElement.updateChild (package:flutter/src/widgets/sliver.dart:1086:37)
#34     SliverMultiBoxAdaptorElement.performRebuild.processElement (package:flutter/src/widgets/sliver.dart:979:35)
#35     Iterable.forEach (dart:core/iterable.dart:366:35)
#36     SliverMultiBoxAdaptorElement.performRebuild (package:flutter/src/widgets/sliver.dart:1032:24)
#37     SliverMultiBoxAdaptorElement.update (package:flutter/src/widgets/sliver.dart:955:7)
#38     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#39     Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#40     MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#41     _ViewportElement.update (package:flutter/src/widgets/viewport.dart:293:11)
#42     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#43     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#44     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#45     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#46     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#47     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#48     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#49     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#50     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#51     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#52     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#53     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#54     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#55     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#56     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#57     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#58     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#59     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#60     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#61     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#62     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#63     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#64     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#65     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#66     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#67     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#68     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#69     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#70     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#71     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#72     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#73     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#74     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#75     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#76     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#77     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#78     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#79     StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#80     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#81     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#82     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#83     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#84     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#85     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#86     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#87     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#88     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#89     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#90     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#91     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#92     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#93     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#94     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#95     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#96     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#97     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#98     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#99     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#100    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#101    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#102    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#103    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#104    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#105    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#106    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#107    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#108    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#109    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#110    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#111    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#112    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#113    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#114    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#115    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#116    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#117    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#118    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#119    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#120    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#121    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#122    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#123    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#124    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#125    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#126    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#127    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#128    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#129    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#130    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#131    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#132    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#133    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#134    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#135    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#136    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#137    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#138    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#139    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#140    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#141    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#142    Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#143    MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#144    _ViewportElement.update (package:flutter/src/widgets/viewport.dart:293:11)
#145    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#146    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#147    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#148    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#149    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#150    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#151    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#152    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#153    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#154    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#155    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#156    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#157    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#158    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#159    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#160    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#161    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#162    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#163    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#164    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#165    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#166    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#167    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#168    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#169    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#170    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#171    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#172    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#173    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#174    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#175    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#176    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#177    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#178    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#179    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#180    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#181    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#182    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#183    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#184    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#185    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#186    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#187    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#188    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#189    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#190    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#191    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#192    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#193    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#194    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#195    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#196    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#197    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#198    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#199    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#200    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#201    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#202    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#203    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#204    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#205    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#206    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#207    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#208    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#209    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#210    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#211    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#212    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#213    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#214    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#215    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#216    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#217    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#218    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#219    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#220    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#221    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#222    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#223    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#224    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#225    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#226    Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#227    MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#228    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#229    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#230    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#231    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#232    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#233    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#234    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#235    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#236    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#237    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#238    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#239    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#240    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#241    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#242    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#243    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#244    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#245    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#246    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#247    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#248    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#249    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#250    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#251    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#252    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#253    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#254    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#255    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#256    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#257    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#258    BuildScope._tryRebuild (package:flutter/src/widgets/framework.dart:2750:15)
#259    BuildScope._flushDirtyElements (package:flutter/src/widgets/framework.dart:2807:11)
#260    BuildOwner.buildScope (package:flutter/src/widgets/framework.dart:3111:18)
#261    WidgetsBinding.drawFrame (package:flutter/src/widgets/binding.dart:1571:21)
#262    RendererBinding._handlePersistentFrameCallback (package:flutter/src/rendering/binding.dart:509:5)
#263    SchedulerBinding._invokeFrameCallback (package:flutter/src/scheduler/binding.dart:1430:15)
#264    SchedulerBinding.handleDrawFrame (package:flutter/src/scheduler/binding.dart:1345:9)
#265    SchedulerBinding._handleDrawFrame (package:flutter/src/scheduler/binding.dart:1198:5)
#266    _rootRun (dart:async/zone_root.dart:35:13)
#267    _CustomZone.run (dart:async/zone.dart:726:19)
#268    _CustomZone.runGuarded (dart:async/zone.dart:625:7)
#269    _invoke (dart:ui/hooks.dart:425:10)
#270    PlatformDispatcher._drawFrame (dart:ui/platform_dispatcher.dart:447:5)
#271    _drawFrame (dart:ui/hooks.dart:395:31)

16:08:44.117388 ERROR [widgets library] Null check operator used on a null value

Null check operator used on a null value

#0      _TrainingDayItemState.build (package:testapp/features/calendar_page/presentation/widgets/day_details/training_day_item.dart:56:43)
#1      StatefulElement.build (package:flutter/src/widgets/framework.dart:5931:27)
#2      ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5817:15)
#3      StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#4      Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#5      StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#6      Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#7      SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#8      Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#9      SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#10     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#11     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#12     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#13     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#14     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#15     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#16     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#17     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#18     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#19     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#20     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#21     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#22     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#23     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#24     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#25     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#26     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#27     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#28     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#29     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#30     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#31     StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#32     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#33     SliverMultiBoxAdaptorElement.updateChild (package:flutter/src/widgets/sliver.dart:1086:37)
#34     SliverMultiBoxAdaptorElement.performRebuild.processElement (package:flutter/src/widgets/sliver.dart:979:35)
#35     Iterable.forEach (dart:core/iterable.dart:366:35)
#36     SliverMultiBoxAdaptorElement.performRebuild (package:flutter/src/widgets/sliver.dart:1032:24)
#37     SliverMultiBoxAdaptorElement.update (package:flutter/src/widgets/sliver.dart:955:7)
#38     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#39     Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#40     MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#41     _ViewportElement.update (package:flutter/src/widgets/viewport.dart:293:11)
#42     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#43     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#44     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#45     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#46     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#47     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#48     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#49     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#50     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#51     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#52     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#53     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#54     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#55     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#56     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#57     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#58     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#59     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#60     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#61     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#62     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#63     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#64     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#65     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#66     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#67     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#68     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#69     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#70     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#71     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#72     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#73     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#74     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#75     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#76     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#77     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#78     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#79     StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#80     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#81     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#82     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#83     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#84     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#85     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#86     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#87     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#88     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#89     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#90     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#91     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#92     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#93     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#94     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#95     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#96     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#97     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#98     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#99     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#100    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#101    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#102    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#103    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#104    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#105    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#106    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#107    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#108    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#109    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#110    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#111    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#112    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#113    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#114    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#115    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#116    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#117    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#118    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#119    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#120    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#121    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#122    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#123    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#124    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#125    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#126    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#127    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#128    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#129    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#130    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#131    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#132    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#133    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#134    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#135    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#136    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#137    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#138    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#139    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#140    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#141    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#142    Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#143    MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#144    _ViewportElement.update (package:flutter/src/widgets/viewport.dart:293:11)
#145    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#146    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#147    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#148    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#149    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#150    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#151    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#152    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#153    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#154    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#155    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#156    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#157    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#158    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#159    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#160    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#161    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#162    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#163    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#164    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#165    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#166    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#167    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#168    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#169    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#170    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#171    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#172    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#173    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#174    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#175    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#176    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#177    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#178    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#179    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#180    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#181    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#182    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#183    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#184    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#185    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#186    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#187    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#188    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#189    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#190    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#191    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#192    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#193    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#194    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#195    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#196    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#197    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#198    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#199    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#200    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#201    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#202    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#203    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#204    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#205    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#206    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#207    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#208    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#209    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#210    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#211    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#212    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#213    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#214    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#215    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#216    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#217    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#218    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#219    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#220    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#221    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#222    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#223    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#224    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#225    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#226    Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#227    MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#228    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#229    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#230    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#231    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#232    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#233    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#234    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#235    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#236    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#237    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#238    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#239    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#240    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#241    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#242    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#243    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#244    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#245    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#246    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#247    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#248    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#249    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#250    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#251    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#252    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#253    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#254    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#255    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#256    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#257    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#258    BuildScope._tryRebuild (package:flutter/src/widgets/framework.dart:2750:15)
#259    BuildScope._flushDirtyElements (package:flutter/src/widgets/framework.dart:2807:11)
#260    BuildOwner.buildScope (package:flutter/src/widgets/framework.dart:3111:18)
#261    WidgetsBinding.drawFrame (package:flutter/src/widgets/binding.dart:1571:21)
#262    RendererBinding._handlePersistentFrameCallback (package:flutter/src/rendering/binding.dart:509:5)
#263    SchedulerBinding._invokeFrameCallback (package:flutter/src/scheduler/binding.dart:1430:15)
#264    SchedulerBinding.handleDrawFrame (package:flutter/src/scheduler/binding.dart:1345:9)
#265    SchedulerBinding._handleDrawFrame (package:flutter/src/scheduler/binding.dart:1198:5)
#266    _rootRun (dart:async/zone_root.dart:35:13)
#267    _CustomZone.run (dart:async/zone.dart:726:19)
#268    _CustomZone.runGuarded (dart:async/zone.dart:625:7)
#269    _invoke (dart:ui/hooks.dart:425:10)
#270    PlatformDispatcher._drawFrame (dart:ui/platform_dispatcher.dart:447:5)
#271    _drawFrame (dart:ui/hooks.dart:395:31)

16:08:44.158122 ERROR [widgets library] Null check operator used on a null value

Null check operator used on a null value

#0      _TrainingDayItemState.build (package:testapp/features/calendar_page/presentation/widgets/day_details/training_day_item.dart:56:43)
#1      StatefulElement.build (package:flutter/src/widgets/framework.dart:5931:27)
#2      ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5817:15)
#3      StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#4      Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#5      StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#6      Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#7      SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#8      Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#9      SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#10     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#11     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#12     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#13     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#14     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#15     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#16     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#17     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#18     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#19     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#20     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#21     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#22     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#23     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#24     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#25     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#26     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#27     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#28     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#29     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#30     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#31     StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#32     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#33     SliverMultiBoxAdaptorElement.updateChild (package:flutter/src/widgets/sliver.dart:1086:37)
#34     SliverMultiBoxAdaptorElement.performRebuild.processElement (package:flutter/src/widgets/sliver.dart:979:35)
#35     Iterable.forEach (dart:core/iterable.dart:366:35)
#36     SliverMultiBoxAdaptorElement.performRebuild (package:flutter/src/widgets/sliver.dart:1032:24)
#37     SliverMultiBoxAdaptorElement.update (package:flutter/src/widgets/sliver.dart:955:7)
#38     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#39     Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#40     MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#41     _ViewportElement.update (package:flutter/src/widgets/viewport.dart:293:11)
#42     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#43     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#44     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#45     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#46     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#47     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#48     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#49     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#50     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#51     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#52     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#53     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#54     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#55     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#56     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#57     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#58     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#59     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#60     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#61     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#62     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#63     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#64     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#65     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#66     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#67     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#68     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#69     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#70     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#71     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#72     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#73     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#74     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#75     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#76     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#77     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#78     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#79     StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#80     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#81     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#82     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#83     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#84     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#85     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#86     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#87     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#88     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#89     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#90     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#91     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#92     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#93     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#94     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#95     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#96     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#97     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#98     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#99     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#100    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#101    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#102    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#103    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#104    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#105    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#106    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#107    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#108    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#109    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#110    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#111    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#112    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#113    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#114    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#115    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#116    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#117    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#118    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#119    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#120    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#121    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#122    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#123    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#124    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#125    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#126    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#127    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#128    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#129    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#130    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#131    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#132    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#133    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#134    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#135    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#136    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#137    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#138    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#139    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#140    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#141    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#142    Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#143    MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#144    _ViewportElement.update (package:flutter/src/widgets/viewport.dart:293:11)
#145    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#146    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#147    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#148    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#149    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#150    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#151    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#152    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#153    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#154    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#155    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#156    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#157    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#158    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#159    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#160    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#161    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#162    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#163    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#164    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#165    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#166    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#167    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#168    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#169    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#170    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#171    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#172    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#173    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#174    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#175    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#176    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#177    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#178    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#179    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#180    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#181    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#182    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#183    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#184    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#185    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#186    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#187    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#188    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#189    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#190    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#191    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#192    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#193    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#194    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#195    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#196    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#197    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#198    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#199    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#200    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#201    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#202    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#203    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#204    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#205    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#206    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#207    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#208    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#209    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#210    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#211    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#212    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#213    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#214    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#215    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#216    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#217    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#218    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#219    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#220    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#221    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#222    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#223    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#224    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#225    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#226    Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#227    MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#228    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#229    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#230    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#231    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#232    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#233    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#234    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#235    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#236    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#237    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#238    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#239    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#240    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#241    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#242    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#243    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#244    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#245    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#246    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#247    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#248    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#249    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#250    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#251    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#252    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#253    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#254    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#255    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#256    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#257    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#258    BuildScope._tryRebuild (package:flutter/src/widgets/framework.dart:2750:15)
#259    BuildScope._flushDirtyElements (package:flutter/src/widgets/framework.dart:2807:11)
#260    BuildOwner.buildScope (package:flutter/src/widgets/framework.dart:3111:18)
#261    WidgetsBinding.drawFrame (package:flutter/src/widgets/binding.dart:1571:21)
#262    RendererBinding._handlePersistentFrameCallback (package:flutter/src/rendering/binding.dart:509:5)
#263    SchedulerBinding._invokeFrameCallback (package:flutter/src/scheduler/binding.dart:1430:15)
#264    SchedulerBinding.handleDrawFrame (package:flutter/src/scheduler/binding.dart:1345:9)
#265    SchedulerBinding._handleDrawFrame (package:flutter/src/scheduler/binding.dart:1198:5)
#266    _rootRun (dart:async/zone_root.dart:35:13)
#267    _CustomZone.run (dart:async/zone.dart:726:19)
#268    _CustomZone.runGuarded (dart:async/zone.dart:625:7)
#269    _invoke (dart:ui/hooks.dart:425:10)
#270    PlatformDispatcher._drawFrame (dart:ui/platform_dispatcher.dart:447:5)
#271    _drawFrame (dart:ui/hooks.dart:395:31)

16:08:44.197220 ERROR [widgets library] Null check operator used on a null value

Null check operator used on a null value

#0      _TrainingDayItemState.build (package:testapp/features/calendar_page/presentation/widgets/day_details/training_day_item.dart:56:43)
#1      StatefulElement.build (package:flutter/src/widgets/framework.dart:5931:27)
#2      ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5817:15)
#3      StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#4      Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#5      StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#6      Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#7      SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#8      Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#9      SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#10     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#11     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#12     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#13     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#14     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#15     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#16     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#17     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#18     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#19     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#20     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#21     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#22     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#23     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#24     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#25     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#26     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#27     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#28     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#29     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#30     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#31     StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#32     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#33     SliverMultiBoxAdaptorElement.updateChild (package:flutter/src/widgets/sliver.dart:1086:37)
#34     SliverMultiBoxAdaptorElement.performRebuild.processElement (package:flutter/src/widgets/sliver.dart:979:35)
#35     Iterable.forEach (dart:core/iterable.dart:366:35)
#36     SliverMultiBoxAdaptorElement.performRebuild (package:flutter/src/widgets/sliver.dart:1032:24)
#37     SliverMultiBoxAdaptorElement.update (package:flutter/src/widgets/sliver.dart:955:7)
#38     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#39     Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#40     MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#41     _ViewportElement.update (package:flutter/src/widgets/viewport.dart:293:11)
#42     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#43     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#44     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#45     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#46     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#47     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#48     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#49     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#50     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#51     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#52     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#53     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#54     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#55     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#56     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#57     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#58     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#59     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#60     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#61     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#62     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#63     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#64     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#65     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#66     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#67     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#68     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#69     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#70     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#71     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#72     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#73     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#74     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#75     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#76     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#77     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#78     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#79     StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#80     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#81     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#82     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#83     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#84     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#85     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#86     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#87     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#88     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#89     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#90     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#91     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#92     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#93     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#94     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#95     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#96     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#97     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#98     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#99     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#100    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#101    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#102    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#103    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#104    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#105    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#106    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#107    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#108    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#109    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#110    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#111    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#112    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#113    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#114    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#115    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#116    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#117    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#118    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#119    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#120    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#121    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#122    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#123    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#124    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#125    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#126    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#127    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#128    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#129    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#130    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#131    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#132    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#133    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#134    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#135    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#136    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#137    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#138    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#139    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#140    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#141    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#142    Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#143    MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#144    _ViewportElement.update (package:flutter/src/widgets/viewport.dart:293:11)
#145    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#146    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#147    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#148    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#149    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#150    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#151    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#152    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#153    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#154    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#155    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#156    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#157    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#158    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#159    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#160    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#161    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#162    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#163    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#164    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#165    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#166    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#167    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#168    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#169    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#170    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#171    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#172    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#173    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#174    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#175    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#176    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#177    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#178    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#179    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#180    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#181    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#182    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#183    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#184    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#185    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#186    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#187    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#188    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#189    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#190    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#191    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#192    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#193    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#194    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#195    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#196    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#197    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#198    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#199    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#200    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#201    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#202    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#203    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#204    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#205    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#206    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#207    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#208    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#209    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#210    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#211    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#212    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#213    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#214    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#215    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#216    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#217    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#218    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#219    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#220    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#221    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#222    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#223    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#224    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#225    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#226    Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#227    MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#228    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#229    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#230    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#231    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#232    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#233    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#234    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#235    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#236    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#237    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#238    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#239    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#240    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#241    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#242    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#243    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#244    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#245    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#246    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#247    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#248    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#249    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#250    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#251    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#252    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#253    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#254    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#255    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#256    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#257    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#258    BuildScope._tryRebuild (package:flutter/src/widgets/framework.dart:2750:15)
#259    BuildScope._flushDirtyElements (package:flutter/src/widgets/framework.dart:2807:11)
#260    BuildOwner.buildScope (package:flutter/src/widgets/framework.dart:3111:18)
#261    WidgetsBinding.drawFrame (package:flutter/src/widgets/binding.dart:1571:21)
#262    RendererBinding._handlePersistentFrameCallback (package:flutter/src/rendering/binding.dart:509:5)
#263    SchedulerBinding._invokeFrameCallback (package:flutter/src/scheduler/binding.dart:1430:15)
#264    SchedulerBinding.handleDrawFrame (package:flutter/src/scheduler/binding.dart:1345:9)
#265    SchedulerBinding._handleDrawFrame (package:flutter/src/scheduler/binding.dart:1198:5)
#266    _rootRun (dart:async/zone_root.dart:35:13)
#267    _CustomZone.run (dart:async/zone.dart:726:19)
#268    _CustomZone.runGuarded (dart:async/zone.dart:625:7)
#269    _invoke (dart:ui/hooks.dart:425:10)
#270    PlatformDispatcher._drawFrame (dart:ui/platform_dispatcher.dart:447:5)
#271    _drawFrame (dart:ui/hooks.dart:395:31)

16:08:44.238692 ERROR [widgets library] Null check operator used on a null value

Null check operator used on a null value

#0      _TrainingDayItemState.build (package:testapp/features/calendar_page/presentation/widgets/day_details/training_day_item.dart:56:43)
#1      StatefulElement.build (package:flutter/src/widgets/framework.dart:5931:27)
#2      ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5817:15)
#3      StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#4      Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#5      StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#6      Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#7      SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#8      Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#9      SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#10     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#11     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#12     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#13     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#14     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#15     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#16     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#17     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#18     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#19     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#20     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#21     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#22     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#23     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#24     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#25     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#26     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#27     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#28     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#29     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#30     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#31     StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#32     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#33     SliverMultiBoxAdaptorElement.updateChild (package:flutter/src/widgets/sliver.dart:1086:37)
#34     SliverMultiBoxAdaptorElement.performRebuild.processElement (package:flutter/src/widgets/sliver.dart:979:35)
#35     Iterable.forEach (dart:core/iterable.dart:366:35)
#36     SliverMultiBoxAdaptorElement.performRebuild (package:flutter/src/widgets/sliver.dart:1032:24)
#37     SliverMultiBoxAdaptorElement.update (package:flutter/src/widgets/sliver.dart:955:7)
#38     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#39     Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#40     MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#41     _ViewportElement.update (package:flutter/src/widgets/viewport.dart:293:11)
#42     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#43     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#44     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#45     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#46     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#47     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#48     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#49     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#50     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#51     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#52     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#53     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#54     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#55     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#56     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#57     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#58     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#59     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#60     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#61     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#62     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#63     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#64     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#65     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#66     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#67     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#68     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#69     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#70     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#71     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#72     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#73     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#74     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#75     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#76     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#77     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#78     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#79     StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#80     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#81     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#82     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#83     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#84     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#85     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#86     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#87     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#88     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#89     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#90     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#91     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#92     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#93     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#94     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#95     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#96     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#97     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#98     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#99     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#100    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#101    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#102    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#103    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#104    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#105    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#106    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#107    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#108    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#109    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#110    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#111    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#112    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#113    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#114    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#115    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#116    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#117    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#118    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#119    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#120    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#121    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#122    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#123    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#124    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#125    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#126    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#127    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#128    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#129    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#130    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#131    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#132    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#133    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#134    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#135    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#136    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#137    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#138    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#139    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#140    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#141    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#142    Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#143    MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#144    _ViewportElement.update (package:flutter/src/widgets/viewport.dart:293:11)
#145    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#146    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#147    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#148    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#149    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#150    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#151    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#152    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#153    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#154    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#155    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#156    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#157    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#158    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#159    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#160    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#161    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#162    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#163    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#164    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#165    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#166    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#167    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#168    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#169    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#170    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#171    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#172    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#173    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#174    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#175    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#176    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#177    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#178    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#179    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#180    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#181    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#182    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#183    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#184    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#185    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#186    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#187    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#188    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#189    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#190    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#191    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#192    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#193    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#194    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#195    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#196    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#197    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#198    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#199    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#200    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#201    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#202    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#203    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#204    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#205    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#206    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#207    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#208    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#209    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#210    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#211    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#212    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#213    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#214    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#215    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#216    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#217    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#218    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#219    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#220    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#221    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#222    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#223    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#224    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#225    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#226    Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#227    MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#228    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#229    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#230    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#231    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#232    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#233    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#234    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#235    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#236    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#237    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#238    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#239    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#240    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#241    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#242    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#243    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#244    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#245    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#246    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#247    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#248    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#249    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#250    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#251    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#252    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#253    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#254    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#255    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#256    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#257    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#258    BuildScope._tryRebuild (package:flutter/src/widgets/framework.dart:2750:15)
#259    BuildScope._flushDirtyElements (package:flutter/src/widgets/framework.dart:2807:11)
#260    BuildOwner.buildScope (package:flutter/src/widgets/framework.dart:3111:18)
#261    WidgetsBinding.drawFrame (package:flutter/src/widgets/binding.dart:1571:21)
#262    RendererBinding._handlePersistentFrameCallback (package:flutter/src/rendering/binding.dart:509:5)
#263    SchedulerBinding._invokeFrameCallback (package:flutter/src/scheduler/binding.dart:1430:15)
#264    SchedulerBinding.handleDrawFrame (package:flutter/src/scheduler/binding.dart:1345:9)
#265    SchedulerBinding._handleDrawFrame (package:flutter/src/scheduler/binding.dart:1198:5)
#266    _rootRun (dart:async/zone_root.dart:35:13)
#267    _CustomZone.run (dart:async/zone.dart:726:19)
#268    _CustomZone.runGuarded (dart:async/zone.dart:625:7)
#269    _invoke (dart:ui/hooks.dart:425:10)
#270    PlatformDispatcher._drawFrame (dart:ui/platform_dispatcher.dart:447:5)
#271    _drawFrame (dart:ui/hooks.dart:395:31)

16:08:44.279479 ERROR [widgets library] Null check operator used on a null value

Null check operator used on a null value

#0      _TrainingDayItemState.build (package:testapp/features/calendar_page/presentation/widgets/day_details/training_day_item.dart:56:43)
#1      StatefulElement.build (package:flutter/src/widgets/framework.dart:5931:27)
#2      ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5817:15)
#3      StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#4      Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#5      StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#6      Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#7      SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#8      Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#9      SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#10     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#11     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#12     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#13     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#14     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#15     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#16     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#17     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#18     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#19     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#20     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#21     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#22     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#23     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#24     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#25     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#26     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#27     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#28     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#29     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#30     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#31     StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#32     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#33     SliverMultiBoxAdaptorElement.updateChild (package:flutter/src/widgets/sliver.dart:1086:37)
#34     SliverMultiBoxAdaptorElement.performRebuild.processElement (package:flutter/src/widgets/sliver.dart:979:35)
#35     Iterable.forEach (dart:core/iterable.dart:366:35)
#36     SliverMultiBoxAdaptorElement.performRebuild (package:flutter/src/widgets/sliver.dart:1032:24)
#37     SliverMultiBoxAdaptorElement.update (package:flutter/src/widgets/sliver.dart:955:7)
#38     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#39     Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#40     MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#41     _ViewportElement.update (package:flutter/src/widgets/viewport.dart:293:11)
#42     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#43     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#44     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#45     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#46     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#47     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#48     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#49     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#50     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#51     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#52     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#53     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#54     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#55     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#56     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#57     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#58     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#59     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#60     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#61     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#62     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#63     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#64     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#65     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#66     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#67     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#68     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#69     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#70     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#71     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#72     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#73     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#74     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#75     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#76     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#77     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#78     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#79     StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#80     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#81     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#82     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#83     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#84     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#85     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#86     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#87     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#88     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#89     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#90     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#91     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#92     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#93     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#94     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#95     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#96     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#97     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#98     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#99     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#100    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#101    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#102    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#103    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#104    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#105    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#106    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#107    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#108    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#109    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#110    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#111    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#112    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#113    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#114    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#115    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#116    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#117    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#118    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#119    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#120    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#121    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#122    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#123    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#124    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#125    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#126    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#127    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#128    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#129    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#130    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#131    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#132    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#133    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#134    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#135    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#136    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#137    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#138    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#139    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#140    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#141    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#142    Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#143    MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#144    _ViewportElement.update (package:flutter/src/widgets/viewport.dart:293:11)
#145    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#146    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#147    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#148    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#149    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#150    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#151    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#152    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#153    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#154    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#155    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#156    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#157    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#158    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#159    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#160    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#161    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#162    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#163    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#164    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#165    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#166    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#167    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#168    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#169    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#170    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#171    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#172    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#173    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#174    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#175    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#176    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#177    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#178    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#179    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#180    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#181    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#182    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#183    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#184    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#185    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#186    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#187    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#188    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#189    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#190    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#191    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#192    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#193    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#194    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#195    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#196    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#197    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#198    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#199    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#200    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#201    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#202    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#203    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#204    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#205    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#206    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#207    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#208    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#209    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#210    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#211    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#212    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#213    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#214    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#215    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#216    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#217    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#218    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#219    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#220    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#221    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#222    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#223    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#224    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#225    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#226    Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#227    MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#228    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#229    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#230    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#231    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#232    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#233    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#234    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#235    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#236    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#237    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#238    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#239    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#240    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#241    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#242    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#243    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#244    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#245    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#246    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#247    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#248    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#249    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#250    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#251    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#252    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#253    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#254    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#255    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#256    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#257    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#258    BuildScope._tryRebuild (package:flutter/src/widgets/framework.dart:2750:15)
#259    BuildScope._flushDirtyElements (package:flutter/src/widgets/framework.dart:2807:11)
#260    BuildOwner.buildScope (package:flutter/src/widgets/framework.dart:3111:18)
#261    WidgetsBinding.drawFrame (package:flutter/src/widgets/binding.dart:1571:21)
#262    RendererBinding._handlePersistentFrameCallback (package:flutter/src/rendering/binding.dart:509:5)
#263    SchedulerBinding._invokeFrameCallback (package:flutter/src/scheduler/binding.dart:1430:15)
#264    SchedulerBinding.handleDrawFrame (package:flutter/src/scheduler/binding.dart:1345:9)
#265    SchedulerBinding._handleDrawFrame (package:flutter/src/scheduler/binding.dart:1198:5)
#266    _rootRun (dart:async/zone_root.dart:35:13)
#267    _CustomZone.run (dart:async/zone.dart:726:19)
#268    _CustomZone.runGuarded (dart:async/zone.dart:625:7)
#269    _invoke (dart:ui/hooks.dart:425:10)
#270    PlatformDispatcher._drawFrame (dart:ui/platform_dispatcher.dart:447:5)
#271    _drawFrame (dart:ui/hooks.dart:395:31)

16:08:44.322436 ERROR [widgets library] Null check operator used on a null value

Null check operator used on a null value

#0      _TrainingDayItemState.build (package:testapp/features/calendar_page/presentation/widgets/day_details/training_day_item.dart:56:43)
#1      StatefulElement.build (package:flutter/src/widgets/framework.dart:5931:27)
#2      ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5817:15)
#3      StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#4      Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#5      StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#6      Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#7      SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#8      Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#9      SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#10     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#11     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#12     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#13     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#14     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#15     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#16     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#17     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#18     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#19     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#20     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#21     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#22     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#23     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#24     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#25     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#26     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#27     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#28     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#29     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#30     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#31     StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#32     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#33     SliverMultiBoxAdaptorElement.updateChild (package:flutter/src/widgets/sliver.dart:1086:37)
#34     SliverMultiBoxAdaptorElement.performRebuild.processElement (package:flutter/src/widgets/sliver.dart:979:35)
#35     Iterable.forEach (dart:core/iterable.dart:366:35)
#36     SliverMultiBoxAdaptorElement.performRebuild (package:flutter/src/widgets/sliver.dart:1032:24)
#37     SliverMultiBoxAdaptorElement.update (package:flutter/src/widgets/sliver.dart:955:7)
#38     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#39     Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#40     MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#41     _ViewportElement.update (package:flutter/src/widgets/viewport.dart:293:11)
#42     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#43     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#44     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#45     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#46     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#47     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#48     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#49     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#50     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#51     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#52     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#53     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#54     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#55     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#56     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#57     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#58     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#59     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#60     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#61     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#62     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#63     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#64     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#65     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#66     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#67     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#68     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#69     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#70     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#71     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#72     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#73     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#74     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#75     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#76     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#77     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#78     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#79     StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#80     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#81     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#82     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#83     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#84     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#85     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#86     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#87     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#88     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#89     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#90     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#91     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#92     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#93     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#94     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#95     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#96     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#97     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#98     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#99     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#100    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#101    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#102    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#103    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#104    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#105    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#106    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#107    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#108    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#109    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#110    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#111    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#112    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#113    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#114    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#115    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#116    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#117    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#118    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#119    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#120    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#121    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#122    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#123    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#124    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#125    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#126    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#127    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#128    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#129    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#130    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#131    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#132    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#133    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#134    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#135    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#136    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#137    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#138    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#139    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#140    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#141    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#142    Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#143    MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#144    _ViewportElement.update (package:flutter/src/widgets/viewport.dart:293:11)
#145    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#146    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#147    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#148    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#149    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#150    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#151    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#152    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#153    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#154    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#155    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#156    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#157    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#158    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#159    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#160    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#161    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#162    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#163    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#164    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#165    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#166    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#167    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#168    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#169    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#170    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#171    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#172    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#173    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#174    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#175    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#176    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#177    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#178    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#179    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#180    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#181    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#182    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#183    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#184    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#185    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#186    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#187    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#188    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#189    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#190    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#191    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#192    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#193    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#194    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#195    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#196    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#197    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#198    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#199    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#200    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#201    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#202    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#203    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#204    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#205    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#206    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#207    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#208    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#209    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#210    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#211    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#212    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#213    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#214    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#215    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#216    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#217    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#218    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#219    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#220    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#221    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#222    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#223    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#224    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#225    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#226    Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#227    MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#228    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#229    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#230    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#231    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#232    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#233    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#234    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#235    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#236    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#237    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#238    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#239    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#240    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#241    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#242    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#243    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#244    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#245    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#246    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#247    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#248    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#249    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#250    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#251    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#252    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#253    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#254    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#255    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#256    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#257    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#258    BuildScope._tryRebuild (package:flutter/src/widgets/framework.dart:2750:15)
#259    BuildScope._flushDirtyElements (package:flutter/src/widgets/framework.dart:2807:11)
#260    BuildOwner.buildScope (package:flutter/src/widgets/framework.dart:3111:18)
#261    WidgetsBinding.drawFrame (package:flutter/src/widgets/binding.dart:1571:21)
#262    RendererBinding._handlePersistentFrameCallback (package:flutter/src/rendering/binding.dart:509:5)
#263    SchedulerBinding._invokeFrameCallback (package:flutter/src/scheduler/binding.dart:1430:15)
#264    SchedulerBinding.handleDrawFrame (package:flutter/src/scheduler/binding.dart:1345:9)
#265    SchedulerBinding._handleDrawFrame (package:flutter/src/scheduler/binding.dart:1198:5)
#266    _rootRun (dart:async/zone_root.dart:35:13)
#267    _CustomZone.run (dart:async/zone.dart:726:19)
#268    _CustomZone.runGuarded (dart:async/zone.dart:625:7)
#269    _invoke (dart:ui/hooks.dart:425:10)
#270    PlatformDispatcher._drawFrame (dart:ui/platform_dispatcher.dart:447:5)
#271    _drawFrame (dart:ui/hooks.dart:395:31)

16:08:44.363204 ERROR [widgets library] Null check operator used on a null value

Null check operator used on a null value

#0      _TrainingDayItemState.build (package:testapp/features/calendar_page/presentation/widgets/day_details/training_day_item.dart:56:43)
#1      StatefulElement.build (package:flutter/src/widgets/framework.dart:5931:27)
#2      ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5817:15)
#3      StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#4      Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#5      StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#6      Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#7      SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#8      Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#9      SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#10     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#11     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#12     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#13     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#14     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#15     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#16     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#17     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#18     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#19     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#20     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#21     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#22     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#23     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#24     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#25     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#26     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#27     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#28     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#29     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#30     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#31     StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#32     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#33     SliverMultiBoxAdaptorElement.updateChild (package:flutter/src/widgets/sliver.dart:1086:37)
#34     SliverMultiBoxAdaptorElement.performRebuild.processElement (package:flutter/src/widgets/sliver.dart:979:35)
#35     Iterable.forEach (dart:core/iterable.dart:366:35)
#36     SliverMultiBoxAdaptorElement.performRebuild (package:flutter/src/widgets/sliver.dart:1032:24)
#37     SliverMultiBoxAdaptorElement.update (package:flutter/src/widgets/sliver.dart:955:7)
#38     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#39     Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#40     MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#41     _ViewportElement.update (package:flutter/src/widgets/viewport.dart:293:11)
#42     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#43     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#44     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#45     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#46     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#47     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#48     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#49     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#50     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#51     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#52     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#53     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#54     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#55     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#56     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#57     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#58     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#59     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#60     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#61     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#62     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#63     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#64     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#65     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#66     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#67     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#68     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#69     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#70     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#71     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#72     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#73     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#74     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#75     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#76     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#77     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#78     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#79     StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#80     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#81     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#82     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#83     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#84     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#85     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#86     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#87     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#88     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#89     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#90     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#91     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#92     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#93     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#94     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#95     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#96     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#97     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#98     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#99     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#100    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#101    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#102    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#103    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#104    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#105    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#106    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#107    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#108    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#109    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#110    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#111    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#112    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#113    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#114    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#115    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#116    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#117    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#118    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#119    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#120    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#121    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#122    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#123    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#124    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#125    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#126    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#127    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#128    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#129    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#130    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#131    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#132    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#133    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#134    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#135    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#136    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#137    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#138    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#139    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#140    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#141    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#142    Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#143    MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#144    _ViewportElement.update (package:flutter/src/widgets/viewport.dart:293:11)
#145    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#146    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#147    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#148    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#149    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#150    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#151    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#152    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#153    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#154    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#155    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#156    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#157    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#158    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#159    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#160    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#161    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#162    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#163    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#164    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#165    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#166    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#167    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#168    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#169    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#170    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#171    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#172    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#173    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#174    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#175    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#176    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#177    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#178    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#179    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#180    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#181    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#182    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#183    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#184    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#185    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#186    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#187    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#188    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#189    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#190    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#191    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#192    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#193    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#194    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#195    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#196    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#197    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#198    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#199    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#200    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#201    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#202    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#203    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#204    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#205    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#206    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#207    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#208    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#209    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#210    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#211    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#212    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#213    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#214    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#215    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#216    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#217    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#218    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#219    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#220    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#221    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#222    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#223    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#224    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#225    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#226    Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#227    MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#228    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#229    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#230    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#231    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#232    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#233    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#234    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#235    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#236    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#237    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#238    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#239    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#240    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#241    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#242    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#243    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#244    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#245    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#246    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#247    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#248    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#249    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#250    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#251    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#252    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#253    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#254    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#255    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#256    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#257    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#258    BuildScope._tryRebuild (package:flutter/src/widgets/framework.dart:2750:15)
#259    BuildScope._flushDirtyElements (package:flutter/src/widgets/framework.dart:2807:11)
#260    BuildOwner.buildScope (package:flutter/src/widgets/framework.dart:3111:18)
#261    WidgetsBinding.drawFrame (package:flutter/src/widgets/binding.dart:1571:21)
#262    RendererBinding._handlePersistentFrameCallback (package:flutter/src/rendering/binding.dart:509:5)
#263    SchedulerBinding._invokeFrameCallback (package:flutter/src/scheduler/binding.dart:1430:15)
#264    SchedulerBinding.handleDrawFrame (package:flutter/src/scheduler/binding.dart:1345:9)
#265    SchedulerBinding._handleDrawFrame (package:flutter/src/scheduler/binding.dart:1198:5)
#266    _rootRun (dart:async/zone_root.dart:35:13)
#267    _CustomZone.run (dart:async/zone.dart:726:19)
#268    _CustomZone.runGuarded (dart:async/zone.dart:625:7)
#269    _invoke (dart:ui/hooks.dart:425:10)
#270    PlatformDispatcher._drawFrame (dart:ui/platform_dispatcher.dart:447:5)
#271    _drawFrame (dart:ui/hooks.dart:395:31)

16:08:44.405929 ERROR [widgets library] Null check operator used on a null value

Null check operator used on a null value

#0      _TrainingDayItemState.build (package:testapp/features/calendar_page/presentation/widgets/day_details/training_day_item.dart:56:43)
#1      StatefulElement.build (package:flutter/src/widgets/framework.dart:5931:27)
#2      ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5817:15)
#3      StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#4      Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#5      StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#6      Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#7      SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#8      Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#9      SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#10     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#11     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#12     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#13     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#14     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#15     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#16     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#17     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#18     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#19     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#20     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#21     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#22     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#23     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#24     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#25     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#26     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#27     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#28     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#29     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#30     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#31     StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#32     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#33     SliverMultiBoxAdaptorElement.updateChild (package:flutter/src/widgets/sliver.dart:1086:37)
#34     SliverMultiBoxAdaptorElement.performRebuild.processElement (package:flutter/src/widgets/sliver.dart:979:35)
#35     Iterable.forEach (dart:core/iterable.dart:366:35)
#36     SliverMultiBoxAdaptorElement.performRebuild (package:flutter/src/widgets/sliver.dart:1032:24)
#37     SliverMultiBoxAdaptorElement.update (package:flutter/src/widgets/sliver.dart:955:7)
#38     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#39     Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#40     MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#41     _ViewportElement.update (package:flutter/src/widgets/viewport.dart:293:11)
#42     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#43     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#44     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#45     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#46     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#47     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#48     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#49     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#50     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#51     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#52     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#53     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#54     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#55     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#56     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#57     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#58     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#59     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#60     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#61     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#62     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#63     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#64     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#65     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#66     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#67     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#68     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#69     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#70     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#71     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#72     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#73     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#74     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#75     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#76     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#77     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#78     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#79     StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#80     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#81     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#82     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#83     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#84     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#85     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#86     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#87     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#88     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#89     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#90     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#91     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#92     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#93     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#94     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#95     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#96     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#97     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#98     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#99     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#100    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#101    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#102    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#103    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#104    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#105    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#106    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#107    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#108    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#109    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#110    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#111    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#112    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#113    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#114    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#115    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#116    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#117    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#118    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#119    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#120    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#121    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#122    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#123    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#124    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#125    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#126    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#127    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#128    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#129    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#130    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#131    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#132    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#133    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#134    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#135    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#136    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#137    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#138    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#139    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#140    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#141    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#142    Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#143    MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#144    _ViewportElement.update (package:flutter/src/widgets/viewport.dart:293:11)
#145    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#146    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#147    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#148    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#149    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#150    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#151    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#152    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#153    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#154    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#155    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#156    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#157    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#158    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#159    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#160    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#161    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#162    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#163    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#164    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#165    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#166    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#167    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#168    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#169    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#170    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#171    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#172    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#173    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#174    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#175    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#176    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#177    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#178    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#179    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#180    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#181    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#182    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#183    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#184    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#185    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#186    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#187    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#188    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#189    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#190    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#191    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#192    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#193    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#194    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#195    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#196    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#197    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#198    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#199    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#200    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#201    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#202    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#203    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#204    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#205    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#206    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#207    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#208    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#209    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#210    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#211    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#212    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#213    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#214    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#215    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#216    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#217    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#218    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#219    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#220    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#221    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#222    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#223    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#224    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#225    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#226    Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#227    MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#228    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#229    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#230    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#231    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#232    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#233    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#234    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#235    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#236    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#237    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#238    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#239    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#240    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#241    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#242    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#243    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#244    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#245    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#246    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#247    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#248    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#249    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#250    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#251    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#252    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#253    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#254    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#255    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#256    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#257    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#258    BuildScope._tryRebuild (package:flutter/src/widgets/framework.dart:2750:15)
#259    BuildScope._flushDirtyElements (package:flutter/src/widgets/framework.dart:2807:11)
#260    BuildOwner.buildScope (package:flutter/src/widgets/framework.dart:3111:18)
#261    WidgetsBinding.drawFrame (package:flutter/src/widgets/binding.dart:1571:21)
#262    RendererBinding._handlePersistentFrameCallback (package:flutter/src/rendering/binding.dart:509:5)
#263    SchedulerBinding._invokeFrameCallback (package:flutter/src/scheduler/binding.dart:1430:15)
#264    SchedulerBinding.handleDrawFrame (package:flutter/src/scheduler/binding.dart:1345:9)
#265    SchedulerBinding._handleDrawFrame (package:flutter/src/scheduler/binding.dart:1198:5)
#266    _rootRun (dart:async/zone_root.dart:35:13)
#267    _CustomZone.run (dart:async/zone.dart:726:19)
#268    _CustomZone.runGuarded (dart:async/zone.dart:625:7)
#269    _invoke (dart:ui/hooks.dart:425:10)
#270    PlatformDispatcher._drawFrame (dart:ui/platform_dispatcher.dart:447:5)
#271    _drawFrame (dart:ui/hooks.dart:395:31)

16:08:44.444863 ERROR [widgets library] Null check operator used on a null value

Null check operator used on a null value

#0      _TrainingDayItemState.build (package:testapp/features/calendar_page/presentation/widgets/day_details/training_day_item.dart:56:43)
#1      StatefulElement.build (package:flutter/src/widgets/framework.dart:5931:27)
#2      ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5817:15)
#3      StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#4      Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#5      StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#6      Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#7      SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#8      Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#9      SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#10     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#11     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#12     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#13     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#14     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#15     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#16     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#17     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#18     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#19     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#20     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#21     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#22     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#23     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#24     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#25     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#26     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#27     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#28     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#29     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#30     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#31     StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#32     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#33     SliverMultiBoxAdaptorElement.updateChild (package:flutter/src/widgets/sliver.dart:1086:37)
#34     SliverMultiBoxAdaptorElement.performRebuild.processElement (package:flutter/src/widgets/sliver.dart:979:35)
#35     Iterable.forEach (dart:core/iterable.dart:366:35)
#36     SliverMultiBoxAdaptorElement.performRebuild (package:flutter/src/widgets/sliver.dart:1032:24)
#37     SliverMultiBoxAdaptorElement.update (package:flutter/src/widgets/sliver.dart:955:7)
#38     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#39     Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#40     MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#41     _ViewportElement.update (package:flutter/src/widgets/viewport.dart:293:11)
#42     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#43     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#44     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#45     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#46     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#47     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#48     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#49     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#50     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#51     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#52     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#53     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#54     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#55     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#56     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#57     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#58     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#59     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#60     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#61     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#62     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#63     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#64     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#65     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#66     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#67     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#68     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#69     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#70     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#71     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#72     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#73     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#74     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#75     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#76     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#77     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#78     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#79     StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#80     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#81     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#82     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#83     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#84     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#85     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#86     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#87     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#88     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#89     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#90     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#91     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#92     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#93     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#94     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#95     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#96     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#97     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#98     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#99     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#100    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#101    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#102    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#103    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#104    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#105    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#106    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#107    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#108    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#109    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#110    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#111    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#112    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#113    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#114    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#115    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#116    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#117    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#118    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#119    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#120    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#121    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#122    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#123    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#124    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#125    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#126    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#127    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#128    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#129    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#130    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#131    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#132    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#133    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#134    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#135    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#136    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#137    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#138    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#139    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#140    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#141    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#142    Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#143    MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#144    _ViewportElement.update (package:flutter/src/widgets/viewport.dart:293:11)
#145    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#146    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#147    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#148    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#149    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#150    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#151    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#152    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#153    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#154    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#155    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#156    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#157    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#158    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#159    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#160    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#161    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#162    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#163    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#164    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#165    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#166    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#167    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#168    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#169    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#170    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#171    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#172    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#173    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#174    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#175    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#176    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#177    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#178    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#179    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#180    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#181    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#182    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#183    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#184    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#185    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#186    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#187    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#188    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#189    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#190    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#191    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#192    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#193    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#194    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#195    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#196    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#197    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#198    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#199    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#200    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#201    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#202    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#203    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#204    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#205    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#206    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#207    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#208    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#209    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#210    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#211    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#212    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#213    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#214    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#215    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#216    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#217    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#218    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#219    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#220    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#221    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#222    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#223    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#224    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#225    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#226    Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#227    MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#228    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#229    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#230    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#231    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#232    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#233    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#234    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#235    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#236    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#237    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#238    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#239    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#240    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#241    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#242    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#243    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#244    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#245    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#246    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#247    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#248    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#249    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#250    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#251    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#252    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#253    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#254    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#255    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#256    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#257    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#258    BuildScope._tryRebuild (package:flutter/src/widgets/framework.dart:2750:15)
#259    BuildScope._flushDirtyElements (package:flutter/src/widgets/framework.dart:2807:11)
#260    BuildOwner.buildScope (package:flutter/src/widgets/framework.dart:3111:18)
#261    WidgetsBinding.drawFrame (package:flutter/src/widgets/binding.dart:1571:21)
#262    RendererBinding._handlePersistentFrameCallback (package:flutter/src/rendering/binding.dart:509:5)
#263    SchedulerBinding._invokeFrameCallback (package:flutter/src/scheduler/binding.dart:1430:15)
#264    SchedulerBinding.handleDrawFrame (package:flutter/src/scheduler/binding.dart:1345:9)
#265    SchedulerBinding._handleDrawFrame (package:flutter/src/scheduler/binding.dart:1198:5)
#266    _rootRun (dart:async/zone_root.dart:35:13)
#267    _CustomZone.run (dart:async/zone.dart:726:19)
#268    _CustomZone.runGuarded (dart:async/zone.dart:625:7)
#269    _invoke (dart:ui/hooks.dart:425:10)
#270    PlatformDispatcher._drawFrame (dart:ui/platform_dispatcher.dart:447:5)
#271    _drawFrame (dart:ui/hooks.dart:395:31)

16:08:44.478040 ERROR [widgets library] Null check operator used on a null value

Null check operator used on a null value

#0      _TrainingDayItemState.build (package:testapp/features/calendar_page/presentation/widgets/day_details/training_day_item.dart:56:43)
#1      StatefulElement.build (package:flutter/src/widgets/framework.dart:5931:27)
#2      ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5817:15)
#3      StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#4      Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#5      StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#6      Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#7      SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#8      Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#9      SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#10     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#11     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#12     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#13     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#14     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#15     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#16     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#17     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#18     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#19     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#20     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#21     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#22     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#23     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#24     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#25     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#26     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#27     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#28     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#29     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#30     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#31     StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#32     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#33     SliverMultiBoxAdaptorElement.updateChild (package:flutter/src/widgets/sliver.dart:1086:37)
#34     SliverMultiBoxAdaptorElement.performRebuild.processElement (package:flutter/src/widgets/sliver.dart:979:35)
#35     Iterable.forEach (dart:core/iterable.dart:366:35)
#36     SliverMultiBoxAdaptorElement.performRebuild (package:flutter/src/widgets/sliver.dart:1032:24)
#37     SliverMultiBoxAdaptorElement.update (package:flutter/src/widgets/sliver.dart:955:7)
#38     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#39     Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#40     MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#41     _ViewportElement.update (package:flutter/src/widgets/viewport.dart:293:11)
#42     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#43     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#44     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#45     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#46     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#47     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#48     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#49     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#50     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#51     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#52     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#53     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#54     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#55     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#56     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#57     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#58     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#59     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#60     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#61     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#62     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#63     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#64     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#65     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#66     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#67     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#68     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#69     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#70     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#71     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#72     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#73     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#74     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#75     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#76     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#77     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#78     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#79     StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#80     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#81     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#82     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#83     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#84     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#85     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#86     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#87     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#88     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#89     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#90     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#91     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#92     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#93     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#94     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#95     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#96     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#97     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#98     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#99     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#100    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#101    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#102    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#103    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#104    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#105    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#106    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#107    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#108    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#109    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#110    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#111    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#112    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#113    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#114    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#115    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#116    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#117    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#118    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#119    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#120    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#121    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#122    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#123    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#124    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#125    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#126    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#127    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#128    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#129    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#130    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#131    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#132    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#133    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#134    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#135    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#136    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#137    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#138    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#139    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#140    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#141    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#142    Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#143    MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#144    _ViewportElement.update (package:flutter/src/widgets/viewport.dart:293:11)
#145    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#146    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#147    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#148    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#149    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#150    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#151    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#152    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#153    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#154    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#155    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#156    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#157    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#158    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#159    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#160    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#161    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#162    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#163    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#164    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#165    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#166    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#167    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#168    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#169    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#170    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#171    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#172    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#173    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#174    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#175    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#176    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#177    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#178    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#179    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#180    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#181    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#182    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#183    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#184    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#185    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#186    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#187    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#188    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#189    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#190    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#191    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#192    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#193    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#194    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#195    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#196    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#197    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#198    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#199    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#200    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#201    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#202    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#203    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#204    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#205    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#206    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#207    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#208    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#209    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#210    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#211    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#212    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#213    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#214    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#215    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#216    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#217    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#218    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#219    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#220    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#221    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#222    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#223    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#224    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#225    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#226    Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#227    MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#228    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#229    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#230    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#231    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#232    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#233    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#234    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#235    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#236    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#237    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#238    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#239    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#240    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#241    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#242    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#243    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#244    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#245    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#246    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#247    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#248    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#249    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#250    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#251    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#252    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#253    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#254    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#255    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#256    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#257    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#258    BuildScope._tryRebuild (package:flutter/src/widgets/framework.dart:2750:15)
#259    BuildScope._flushDirtyElements (package:flutter/src/widgets/framework.dart:2807:11)
#260    BuildOwner.buildScope (package:flutter/src/widgets/framework.dart:3111:18)
#261    WidgetsBinding.drawFrame (package:flutter/src/widgets/binding.dart:1571:21)
#262    RendererBinding._handlePersistentFrameCallback (package:flutter/src/rendering/binding.dart:509:5)
#263    SchedulerBinding._invokeFrameCallback (package:flutter/src/scheduler/binding.dart:1430:15)
#264    SchedulerBinding.handleDrawFrame (package:flutter/src/scheduler/binding.dart:1345:9)
#265    SchedulerBinding._handleDrawFrame (package:flutter/src/scheduler/binding.dart:1198:5)
#266    _rootRun (dart:async/zone_root.dart:35:13)
#267    _CustomZone.run (dart:async/zone.dart:726:19)
#268    _CustomZone.runGuarded (dart:async/zone.dart:625:7)
#269    _invoke (dart:ui/hooks.dart:425:10)
#270    PlatformDispatcher._drawFrame (dart:ui/platform_dispatcher.dart:447:5)
#271    _drawFrame (dart:ui/hooks.dart:395:31)

16:08:44.511065 ERROR [widgets library] Null check operator used on a null value

Null check operator used on a null value

#0      _TrainingDayItemState.build (package:testapp/features/calendar_page/presentation/widgets/day_details/training_day_item.dart:56:43)
#1      StatefulElement.build (package:flutter/src/widgets/framework.dart:5931:27)
#2      ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5817:15)
#3      StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#4      Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#5      StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#6      Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#7      SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#8      Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#9      SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#10     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#11     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#12     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#13     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#14     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#15     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#16     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#17     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#18     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#19     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#20     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#21     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#22     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#23     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#24     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#25     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#26     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#27     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#28     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#29     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#30     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#31     StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#32     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#33     SliverMultiBoxAdaptorElement.updateChild (package:flutter/src/widgets/sliver.dart:1086:37)
#34     SliverMultiBoxAdaptorElement.performRebuild.processElement (package:flutter/src/widgets/sliver.dart:979:35)
#35     Iterable.forEach (dart:core/iterable.dart:366:35)
#36     SliverMultiBoxAdaptorElement.performRebuild (package:flutter/src/widgets/sliver.dart:1032:24)
#37     SliverMultiBoxAdaptorElement.update (package:flutter/src/widgets/sliver.dart:955:7)
#38     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#39     Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#40     MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#41     _ViewportElement.update (package:flutter/src/widgets/viewport.dart:293:11)
#42     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#43     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#44     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#45     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#46     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#47     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#48     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#49     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#50     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#51     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#52     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#53     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#54     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#55     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#56     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#57     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#58     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#59     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#60     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#61     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#62     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#63     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#64     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#65     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#66     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#67     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#68     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#69     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#70     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#71     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#72     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#73     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#74     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#75     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#76     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#77     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#78     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#79     StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#80     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#81     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#82     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#83     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#84     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#85     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#86     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#87     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#88     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#89     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#90     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#91     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#92     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#93     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#94     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#95     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#96     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#97     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#98     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#99     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#100    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#101    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#102    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#103    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#104    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#105    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#106    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#107    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#108    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#109    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#110    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#111    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#112    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#113    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#114    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#115    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#116    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#117    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#118    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#119    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#120    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#121    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#122    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#123    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#124    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#125    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#126    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#127    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#128    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#129    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#130    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#131    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#132    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#133    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#134    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#135    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#136    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#137    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#138    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#139    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#140    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#141    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#142    Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#143    MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#144    _ViewportElement.update (package:flutter/src/widgets/viewport.dart:293:11)
#145    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#146    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#147    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#148    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#149    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#150    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#151    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#152    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#153    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#154    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#155    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#156    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#157    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#158    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#159    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#160    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#161    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#162    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#163    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#164    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#165    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#166    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#167    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#168    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#169    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#170    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#171    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#172    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#173    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#174    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#175    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#176    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#177    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#178    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#179    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#180    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#181    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#182    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#183    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#184    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#185    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#186    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#187    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#188    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#189    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#190    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#191    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#192    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#193    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#194    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#195    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#196    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#197    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#198    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#199    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#200    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#201    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#202    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#203    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#204    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#205    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#206    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#207    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#208    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#209    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#210    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#211    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#212    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#213    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#214    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#215    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#216    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#217    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#218    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#219    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#220    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#221    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#222    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#223    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#224    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#225    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#226    Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#227    MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#228    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#229    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#230    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#231    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#232    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#233    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#234    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#235    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#236    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#237    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#238    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#239    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#240    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#241    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#242    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#243    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#244    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#245    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#246    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#247    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#248    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#249    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#250    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#251    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#252    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#253    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#254    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#255    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#256    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#257    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#258    BuildScope._tryRebuild (package:flutter/src/widgets/framework.dart:2750:15)
#259    BuildScope._flushDirtyElements (package:flutter/src/widgets/framework.dart:2807:11)
#260    BuildOwner.buildScope (package:flutter/src/widgets/framework.dart:3111:18)
#261    WidgetsBinding.drawFrame (package:flutter/src/widgets/binding.dart:1571:21)
#262    RendererBinding._handlePersistentFrameCallback (package:flutter/src/rendering/binding.dart:509:5)
#263    SchedulerBinding._invokeFrameCallback (package:flutter/src/scheduler/binding.dart:1430:15)
#264    SchedulerBinding.handleDrawFrame (package:flutter/src/scheduler/binding.dart:1345:9)
#265    SchedulerBinding._handleDrawFrame (package:flutter/src/scheduler/binding.dart:1198:5)
#266    _rootRun (dart:async/zone_root.dart:35:13)
#267    _CustomZone.run (dart:async/zone.dart:726:19)
#268    _CustomZone.runGuarded (dart:async/zone.dart:625:7)
#269    _invoke (dart:ui/hooks.dart:425:10)
#270    PlatformDispatcher._drawFrame (dart:ui/platform_dispatcher.dart:447:5)
#271    _drawFrame (dart:ui/hooks.dart:395:31)

16:08:44.544270 ERROR [widgets library] Null check operator used on a null value

Null check operator used on a null value

#0      _TrainingDayItemState.build (package:testapp/features/calendar_page/presentation/widgets/day_details/training_day_item.dart:56:43)
#1      StatefulElement.build (package:flutter/src/widgets/framework.dart:5931:27)
#2      ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5817:15)
#3      StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#4      Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#5      StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#6      Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#7      SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#8      Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#9      SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#10     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#11     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#12     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#13     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#14     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#15     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#16     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#17     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#18     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#19     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#20     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#21     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#22     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#23     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#24     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#25     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#26     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#27     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#28     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#29     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#30     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#31     StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#32     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#33     SliverMultiBoxAdaptorElement.updateChild (package:flutter/src/widgets/sliver.dart:1086:37)
#34     SliverMultiBoxAdaptorElement.performRebuild.processElement (package:flutter/src/widgets/sliver.dart:979:35)
#35     Iterable.forEach (dart:core/iterable.dart:366:35)
#36     SliverMultiBoxAdaptorElement.performRebuild (package:flutter/src/widgets/sliver.dart:1032:24)
#37     SliverMultiBoxAdaptorElement.update (package:flutter/src/widgets/sliver.dart:955:7)
#38     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#39     Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#40     MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#41     _ViewportElement.update (package:flutter/src/widgets/viewport.dart:293:11)
#42     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#43     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#44     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#45     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#46     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#47     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#48     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#49     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#50     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#51     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#52     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#53     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#54     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#55     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#56     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#57     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#58     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#59     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#60     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#61     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#62     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#63     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#64     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#65     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#66     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#67     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#68     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#69     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#70     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#71     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#72     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#73     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#74     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#75     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#76     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#77     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#78     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#79     StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#80     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#81     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#82     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#83     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#84     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#85     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#86     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#87     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#88     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#89     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#90     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#91     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#92     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#93     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#94     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#95     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#96     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#97     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#98     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#99     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#100    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#101    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#102    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#103    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#104    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#105    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#106    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#107    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#108    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#109    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#110    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#111    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#112    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#113    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#114    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#115    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#116    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#117    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#118    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#119    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#120    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#121    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#122    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#123    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#124    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#125    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#126    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#127    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#128    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#129    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#130    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#131    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#132    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#133    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#134    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#135    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#136    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#137    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#138    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#139    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#140    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#141    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#142    Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#143    MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#144    _ViewportElement.update (package:flutter/src/widgets/viewport.dart:293:11)
#145    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#146    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#147    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#148    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#149    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#150    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#151    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#152    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#153    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#154    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#155    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#156    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#157    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#158    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#159    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#160    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#161    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#162    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#163    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#164    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#165    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#166    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#167    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#168    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#169    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#170    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#171    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#172    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#173    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#174    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#175    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#176    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#177    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#178    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#179    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#180    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#181    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#182    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#183    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#184    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#185    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#186    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#187    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#188    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#189    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#190    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#191    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#192    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#193    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#194    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#195    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#196    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#197    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#198    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#199    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#200    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#201    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#202    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#203    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#204    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#205    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#206    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#207    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#208    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#209    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#210    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#211    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#212    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#213    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#214    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#215    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#216    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#217    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#218    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#219    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#220    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#221    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#222    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#223    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#224    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#225    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#226    Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#227    MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#228    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#229    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#230    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#231    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#232    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#233    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#234    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#235    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#236    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#237    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#238    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#239    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#240    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#241    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#242    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#243    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#244    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#245    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#246    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#247    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#248    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#249    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#250    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#251    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#252    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#253    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#254    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#255    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#256    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#257    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#258    BuildScope._tryRebuild (package:flutter/src/widgets/framework.dart:2750:15)
#259    BuildScope._flushDirtyElements (package:flutter/src/widgets/framework.dart:2807:11)
#260    BuildOwner.buildScope (package:flutter/src/widgets/framework.dart:3111:18)
#261    WidgetsBinding.drawFrame (package:flutter/src/widgets/binding.dart:1571:21)
#262    RendererBinding._handlePersistentFrameCallback (package:flutter/src/rendering/binding.dart:509:5)
#263    SchedulerBinding._invokeFrameCallback (package:flutter/src/scheduler/binding.dart:1430:15)
#264    SchedulerBinding.handleDrawFrame (package:flutter/src/scheduler/binding.dart:1345:9)
#265    SchedulerBinding._handleDrawFrame (package:flutter/src/scheduler/binding.dart:1198:5)
#266    _rootRun (dart:async/zone_root.dart:35:13)
#267    _CustomZone.run (dart:async/zone.dart:726:19)
#268    _CustomZone.runGuarded (dart:async/zone.dart:625:7)
#269    _invoke (dart:ui/hooks.dart:425:10)
#270    PlatformDispatcher._drawFrame (dart:ui/platform_dispatcher.dart:447:5)
#271    _drawFrame (dart:ui/hooks.dart:395:31)

16:08:44.577167 ERROR [widgets library] Null check operator used on a null value

Null check operator used on a null value

#0      _TrainingDayItemState.build (package:testapp/features/calendar_page/presentation/widgets/day_details/training_day_item.dart:56:43)
#1      StatefulElement.build (package:flutter/src/widgets/framework.dart:5931:27)
#2      ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5817:15)
#3      StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#4      Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#5      StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#6      Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#7      SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#8      Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#9      SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#10     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#11     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#12     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#13     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#14     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#15     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#16     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#17     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#18     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#19     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#20     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#21     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#22     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#23     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#24     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#25     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#26     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#27     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#28     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#29     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#30     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#31     StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#32     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#33     SliverMultiBoxAdaptorElement.updateChild (package:flutter/src/widgets/sliver.dart:1086:37)
#34     SliverMultiBoxAdaptorElement.performRebuild.processElement (package:flutter/src/widgets/sliver.dart:979:35)
#35     Iterable.forEach (dart:core/iterable.dart:366:35)
#36     SliverMultiBoxAdaptorElement.performRebuild (package:flutter/src/widgets/sliver.dart:1032:24)
#37     SliverMultiBoxAdaptorElement.update (package:flutter/src/widgets/sliver.dart:955:7)
#38     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#39     Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#40     MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#41     _ViewportElement.update (package:flutter/src/widgets/viewport.dart:293:11)
#42     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#43     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#44     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#45     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#46     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#47     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#48     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#49     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#50     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#51     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#52     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#53     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#54     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#55     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#56     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#57     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#58     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#59     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#60     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#61     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#62     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#63     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#64     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#65     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#66     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#67     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#68     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#69     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#70     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#71     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#72     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#73     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#74     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#75     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#76     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#77     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#78     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#79     StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#80     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#81     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#82     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#83     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#84     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#85     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#86     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#87     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#88     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#89     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#90     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#91     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#92     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#93     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#94     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#95     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#96     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#97     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#98     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#99     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#100    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#101    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#102    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#103    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#104    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#105    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#106    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#107    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#108    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#109    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#110    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#111    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#112    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#113    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#114    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#115    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#116    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#117    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#118    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#119    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#120    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#121    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#122    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#123    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#124    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#125    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#126    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#127    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#128    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#129    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#130    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#131    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#132    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#133    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#134    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#135    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#136    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#137    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#138    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#139    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#140    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#141    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#142    Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#143    MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#144    _ViewportElement.update (package:flutter/src/widgets/viewport.dart:293:11)
#145    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#146    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#147    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#148    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#149    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#150    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#151    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#152    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#153    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#154    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#155    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#156    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#157    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#158    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#159    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#160    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#161    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#162    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#163    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#164    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#165    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#166    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#167    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#168    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#169    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#170    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#171    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#172    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#173    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#174    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#175    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#176    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#177    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#178    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#179    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#180    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#181    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#182    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#183    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#184    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#185    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#186    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#187    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#188    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#189    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#190    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#191    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#192    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#193    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#194    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#195    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#196    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#197    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#198    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#199    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#200    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#201    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#202    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#203    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#204    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#205    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#206    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#207    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#208    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#209    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#210    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#211    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#212    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#213    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#214    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#215    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#216    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#217    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#218    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#219    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#220    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#221    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#222    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#223    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#224    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#225    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#226    Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#227    MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#228    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#229    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#230    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#231    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#232    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#233    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#234    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#235    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#236    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#237    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#238    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#239    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#240    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#241    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#242    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#243    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#244    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#245    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#246    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#247    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#248    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#249    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#250    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#251    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#252    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#253    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#254    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#255    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#256    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#257    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#258    BuildScope._tryRebuild (package:flutter/src/widgets/framework.dart:2750:15)
#259    BuildScope._flushDirtyElements (package:flutter/src/widgets/framework.dart:2807:11)
#260    BuildOwner.buildScope (package:flutter/src/widgets/framework.dart:3111:18)
#261    WidgetsBinding.drawFrame (package:flutter/src/widgets/binding.dart:1571:21)
#262    RendererBinding._handlePersistentFrameCallback (package:flutter/src/rendering/binding.dart:509:5)
#263    SchedulerBinding._invokeFrameCallback (package:flutter/src/scheduler/binding.dart:1430:15)
#264    SchedulerBinding.handleDrawFrame (package:flutter/src/scheduler/binding.dart:1345:9)
#265    SchedulerBinding._handleDrawFrame (package:flutter/src/scheduler/binding.dart:1198:5)
#266    _rootRun (dart:async/zone_root.dart:35:13)
#267    _CustomZone.run (dart:async/zone.dart:726:19)
#268    _CustomZone.runGuarded (dart:async/zone.dart:625:7)
#269    _invoke (dart:ui/hooks.dart:425:10)
#270    PlatformDispatcher._drawFrame (dart:ui/platform_dispatcher.dart:447:5)
#271    _drawFrame (dart:ui/hooks.dart:395:31)

16:08:44.621714 ERROR [widgets library] Null check operator used on a null value

Null check operator used on a null value

#0      _TrainingDayItemState.build (package:testapp/features/calendar_page/presentation/widgets/day_details/training_day_item.dart:56:43)
#1      StatefulElement.build (package:flutter/src/widgets/framework.dart:5931:27)
#2      ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5817:15)
#3      StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#4      Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#5      StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#6      Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#7      SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#8      Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#9      SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#10     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#11     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#12     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#13     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#14     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#15     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#16     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#17     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#18     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#19     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#20     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#21     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#22     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#23     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#24     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#25     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#26     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#27     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#28     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#29     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#30     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#31     StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#32     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#33     SliverMultiBoxAdaptorElement.updateChild (package:flutter/src/widgets/sliver.dart:1086:37)
#34     SliverMultiBoxAdaptorElement.performRebuild.processElement (package:flutter/src/widgets/sliver.dart:979:35)
#35     Iterable.forEach (dart:core/iterable.dart:366:35)
#36     SliverMultiBoxAdaptorElement.performRebuild (package:flutter/src/widgets/sliver.dart:1032:24)
#37     SliverMultiBoxAdaptorElement.update (package:flutter/src/widgets/sliver.dart:955:7)
#38     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#39     Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#40     MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#41     _ViewportElement.update (package:flutter/src/widgets/viewport.dart:293:11)
#42     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#43     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#44     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#45     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#46     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#47     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#48     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#49     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#50     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#51     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#52     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#53     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#54     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#55     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#56     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#57     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#58     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#59     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#60     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#61     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#62     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#63     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#64     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#65     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#66     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#67     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#68     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#69     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#70     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#71     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#72     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#73     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#74     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#75     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#76     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#77     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#78     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#79     StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#80     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#81     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#82     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#83     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#84     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#85     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#86     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#87     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#88     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#89     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#90     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#91     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#92     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#93     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#94     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#95     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#96     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#97     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#98     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#99     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#100    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#101    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#102    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#103    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#104    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#105    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#106    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#107    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#108    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#109    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#110    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#111    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#112    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#113    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#114    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#115    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#116    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#117    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#118    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#119    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#120    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#121    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#122    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#123    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#124    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#125    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#126    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#127    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#128    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#129    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#130    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#131    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#132    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#133    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#134    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#135    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#136    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#137    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#138    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#139    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#140    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#141    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#142    Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#143    MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#144    _ViewportElement.update (package:flutter/src/widgets/viewport.dart:293:11)
#145    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#146    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#147    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#148    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#149    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#150    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#151    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#152    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#153    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#154    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#155    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#156    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#157    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#158    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#159    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#160    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#161    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#162    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#163    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#164    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#165    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#166    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#167    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#168    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#169    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#170    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#171    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#172    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#173    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#174    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#175    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#176    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#177    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#178    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#179    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#180    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#181    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#182    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#183    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#184    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#185    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#186    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#187    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#188    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#189    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#190    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#191    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#192    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#193    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#194    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#195    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#196    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#197    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#198    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#199    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#200    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#201    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#202    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#203    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#204    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#205    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#206    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#207    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#208    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#209    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#210    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#211    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#212    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#213    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#214    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#215    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#216    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#217    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#218    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#219    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#220    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#221    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#222    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#223    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#224    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#225    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#226    Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#227    MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#228    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#229    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#230    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#231    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#232    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#233    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#234    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#235    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#236    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#237    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#238    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#239    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#240    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#241    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#242    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#243    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#244    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#245    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#246    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#247    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#248    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#249    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#250    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#251    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#252    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#253    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#254    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#255    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#256    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#257    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#258    BuildScope._tryRebuild (package:flutter/src/widgets/framework.dart:2750:15)
#259    BuildScope._flushDirtyElements (package:flutter/src/widgets/framework.dart:2807:11)
#260    BuildOwner.buildScope (package:flutter/src/widgets/framework.dart:3111:18)
#261    WidgetsBinding.drawFrame (package:flutter/src/widgets/binding.dart:1571:21)
#262    RendererBinding._handlePersistentFrameCallback (package:flutter/src/rendering/binding.dart:509:5)
#263    SchedulerBinding._invokeFrameCallback (package:flutter/src/scheduler/binding.dart:1430:15)
#264    SchedulerBinding.handleDrawFrame (package:flutter/src/scheduler/binding.dart:1345:9)
#265    SchedulerBinding._handleDrawFrame (package:flutter/src/scheduler/binding.dart:1198:5)
#266    _rootRun (dart:async/zone_root.dart:35:13)
#267    _CustomZone.run (dart:async/zone.dart:726:19)
#268    _CustomZone.runGuarded (dart:async/zone.dart:625:7)
#269    _invoke (dart:ui/hooks.dart:425:10)
#270    PlatformDispatcher._drawFrame (dart:ui/platform_dispatcher.dart:447:5)
#271    _drawFrame (dart:ui/hooks.dart:395:31)

16:08:44.662995 ERROR [widgets library] Null check operator used on a null value

Null check operator used on a null value

#0      _TrainingDayItemState.build (package:testapp/features/calendar_page/presentation/widgets/day_details/training_day_item.dart:56:43)
#1      StatefulElement.build (package:flutter/src/widgets/framework.dart:5931:27)
#2      ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5817:15)
#3      StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#4      Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#5      StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#6      Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#7      SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#8      Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#9      SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#10     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#11     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#12     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#13     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#14     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#15     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#16     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#17     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#18     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#19     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#20     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#21     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#22     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#23     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#24     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#25     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#26     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#27     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#28     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#29     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#30     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#31     StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#32     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#33     SliverMultiBoxAdaptorElement.updateChild (package:flutter/src/widgets/sliver.dart:1086:37)
#34     SliverMultiBoxAdaptorElement.performRebuild.processElement (package:flutter/src/widgets/sliver.dart:979:35)
#35     Iterable.forEach (dart:core/iterable.dart:366:35)
#36     SliverMultiBoxAdaptorElement.performRebuild (package:flutter/src/widgets/sliver.dart:1032:24)
#37     SliverMultiBoxAdaptorElement.update (package:flutter/src/widgets/sliver.dart:955:7)
#38     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#39     Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#40     MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#41     _ViewportElement.update (package:flutter/src/widgets/viewport.dart:293:11)
#42     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#43     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#44     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#45     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#46     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#47     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#48     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#49     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#50     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#51     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#52     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#53     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#54     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#55     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#56     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#57     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#58     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#59     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#60     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#61     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#62     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#63     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#64     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#65     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#66     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#67     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#68     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#69     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#70     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#71     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#72     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#73     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#74     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#75     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#76     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#77     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#78     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#79     StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#80     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#81     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#82     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#83     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#84     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#85     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#86     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#87     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#88     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#89     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#90     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#91     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#92     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#93     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#94     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#95     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#96     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#97     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#98     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#99     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#100    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#101    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#102    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#103    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#104    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#105    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#106    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#107    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#108    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#109    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#110    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#111    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#112    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#113    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#114    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#115    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#116    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#117    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#118    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#119    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#120    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#121    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#122    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#123    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#124    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#125    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#126    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#127    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#128    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#129    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#130    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#131    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#132    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#133    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#134    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#135    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#136    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#137    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#138    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#139    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#140    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#141    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#142    Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#143    MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#144    _ViewportElement.update (package:flutter/src/widgets/viewport.dart:293:11)
#145    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#146    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#147    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#148    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#149    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#150    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#151    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#152    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#153    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#154    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#155    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#156    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#157    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#158    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#159    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#160    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#161    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#162    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#163    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#164    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#165    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#166    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#167    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#168    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#169    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#170    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#171    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#172    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#173    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#174    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#175    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#176    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#177    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#178    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#179    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#180    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#181    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#182    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#183    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#184    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#185    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#186    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#187    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#188    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#189    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#190    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#191    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#192    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#193    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#194    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#195    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#196    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#197    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#198    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#199    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#200    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#201    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#202    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#203    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#204    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#205    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#206    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#207    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#208    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#209    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#210    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#211    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#212    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#213    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#214    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#215    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#216    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#217    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#218    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#219    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#220    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#221    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#222    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#223    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#224    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#225    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#226    Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#227    MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#228    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#229    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#230    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#231    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#232    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#233    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#234    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#235    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#236    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#237    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#238    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#239    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#240    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#241    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#242    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#243    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#244    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#245    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#246    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#247    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#248    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#249    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#250    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#251    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#252    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#253    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#254    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#255    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#256    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#257    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#258    BuildScope._tryRebuild (package:flutter/src/widgets/framework.dart:2750:15)
#259    BuildScope._flushDirtyElements (package:flutter/src/widgets/framework.dart:2807:11)
#260    BuildOwner.buildScope (package:flutter/src/widgets/framework.dart:3111:18)
#261    WidgetsBinding.drawFrame (package:flutter/src/widgets/binding.dart:1571:21)
#262    RendererBinding._handlePersistentFrameCallback (package:flutter/src/rendering/binding.dart:509:5)
#263    SchedulerBinding._invokeFrameCallback (package:flutter/src/scheduler/binding.dart:1430:15)
#264    SchedulerBinding.handleDrawFrame (package:flutter/src/scheduler/binding.dart:1345:9)
#265    SchedulerBinding._handleDrawFrame (package:flutter/src/scheduler/binding.dart:1198:5)
#266    _rootRun (dart:async/zone_root.dart:35:13)
#267    _CustomZone.run (dart:async/zone.dart:726:19)
#268    _CustomZone.runGuarded (dart:async/zone.dart:625:7)
#269    _invoke (dart:ui/hooks.dart:425:10)
#270    PlatformDispatcher._drawFrame (dart:ui/platform_dispatcher.dart:447:5)
#271    _drawFrame (dart:ui/hooks.dart:395:31)

16:08:44.702006 ERROR [widgets library] Null check operator used on a null value

Null check operator used on a null value

#0      _TrainingDayItemState.build (package:testapp/features/calendar_page/presentation/widgets/day_details/training_day_item.dart:56:43)
#1      StatefulElement.build (package:flutter/src/widgets/framework.dart:5931:27)
#2      ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5817:15)
#3      StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#4      Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#5      StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#6      Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#7      SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#8      Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#9      SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#10     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#11     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#12     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#13     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#14     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#15     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#16     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#17     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#18     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#19     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#20     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#21     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#22     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#23     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#24     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#25     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#26     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#27     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#28     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#29     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#30     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#31     StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#32     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#33     SliverMultiBoxAdaptorElement.updateChild (package:flutter/src/widgets/sliver.dart:1086:37)
#34     SliverMultiBoxAdaptorElement.performRebuild.processElement (package:flutter/src/widgets/sliver.dart:979:35)
#35     Iterable.forEach (dart:core/iterable.dart:366:35)
#36     SliverMultiBoxAdaptorElement.performRebuild (package:flutter/src/widgets/sliver.dart:1032:24)
#37     SliverMultiBoxAdaptorElement.update (package:flutter/src/widgets/sliver.dart:955:7)
#38     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#39     Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#40     MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#41     _ViewportElement.update (package:flutter/src/widgets/viewport.dart:293:11)
#42     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#43     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#44     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#45     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#46     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#47     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#48     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#49     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#50     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#51     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#52     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#53     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#54     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#55     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#56     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#57     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#58     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#59     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#60     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#61     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#62     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#63     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#64     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#65     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#66     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#67     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#68     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#69     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#70     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#71     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#72     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#73     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#74     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#75     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#76     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#77     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#78     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#79     StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#80     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#81     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#82     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#83     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#84     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#85     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#86     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#87     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#88     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#89     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#90     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#91     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#92     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#93     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#94     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#95     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#96     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#97     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#98     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#99     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#100    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#101    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#102    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#103    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#104    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#105    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#106    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#107    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#108    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#109    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#110    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#111    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#112    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#113    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#114    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#115    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#116    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#117    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#118    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#119    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#120    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#121    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#122    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#123    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#124    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#125    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#126    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#127    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#128    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#129    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#130    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#131    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#132    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#133    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#134    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#135    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#136    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#137    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#138    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#139    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#140    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#141    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#142    Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#143    MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#144    _ViewportElement.update (package:flutter/src/widgets/viewport.dart:293:11)
#145    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#146    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#147    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#148    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#149    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#150    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#151    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#152    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#153    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#154    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#155    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#156    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#157    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#158    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#159    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#160    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#161    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#162    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#163    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#164    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#165    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#166    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#167    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#168    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#169    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#170    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#171    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#172    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#173    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#174    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#175    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#176    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#177    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#178    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#179    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#180    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#181    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#182    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#183    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#184    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#185    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#186    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#187    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#188    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#189    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#190    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#191    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#192    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#193    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#194    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#195    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#196    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#197    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#198    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#199    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#200    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#201    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#202    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#203    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#204    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#205    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#206    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#207    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#208    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#209    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#210    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#211    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#212    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#213    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#214    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#215    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#216    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#217    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#218    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#219    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#220    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#221    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#222    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#223    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#224    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#225    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#226    Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#227    MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#228    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#229    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#230    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#231    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#232    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#233    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#234    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#235    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#236    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#237    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#238    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#239    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#240    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#241    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#242    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#243    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#244    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#245    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#246    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#247    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#248    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#249    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#250    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#251    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#252    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#253    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#254    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#255    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#256    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#257    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#258    BuildScope._tryRebuild (package:flutter/src/widgets/framework.dart:2750:15)
#259    BuildScope._flushDirtyElements (package:flutter/src/widgets/framework.dart:2807:11)
#260    BuildOwner.buildScope (package:flutter/src/widgets/framework.dart:3111:18)
#261    WidgetsBinding.drawFrame (package:flutter/src/widgets/binding.dart:1571:21)
#262    RendererBinding._handlePersistentFrameCallback (package:flutter/src/rendering/binding.dart:509:5)
#263    SchedulerBinding._invokeFrameCallback (package:flutter/src/scheduler/binding.dart:1430:15)
#264    SchedulerBinding.handleDrawFrame (package:flutter/src/scheduler/binding.dart:1345:9)
#265    SchedulerBinding._handleDrawFrame (package:flutter/src/scheduler/binding.dart:1198:5)
#266    _rootRun (dart:async/zone_root.dart:35:13)
#267    _CustomZone.run (dart:async/zone.dart:726:19)
#268    _CustomZone.runGuarded (dart:async/zone.dart:625:7)
#269    _invoke (dart:ui/hooks.dart:425:10)
#270    PlatformDispatcher._drawFrame (dart:ui/platform_dispatcher.dart:447:5)
#271    _drawFrame (dart:ui/hooks.dart:395:31)

16:08:44.735783 ERROR [widgets library] Null check operator used on a null value

Null check operator used on a null value

#0      _TrainingDayItemState.build (package:testapp/features/calendar_page/presentation/widgets/day_details/training_day_item.dart:56:43)
#1      StatefulElement.build (package:flutter/src/widgets/framework.dart:5931:27)
#2      ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5817:15)
#3      StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#4      Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#5      StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#6      Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#7      SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#8      Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#9      SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#10     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#11     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#12     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#13     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#14     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#15     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#16     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#17     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#18     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#19     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#20     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#21     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#22     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#23     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#24     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#25     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#26     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#27     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#28     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#29     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#30     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#31     StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#32     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#33     SliverMultiBoxAdaptorElement.updateChild (package:flutter/src/widgets/sliver.dart:1086:37)
#34     SliverMultiBoxAdaptorElement.performRebuild.processElement (package:flutter/src/widgets/sliver.dart:979:35)
#35     Iterable.forEach (dart:core/iterable.dart:366:35)
#36     SliverMultiBoxAdaptorElement.performRebuild (package:flutter/src/widgets/sliver.dart:1032:24)
#37     SliverMultiBoxAdaptorElement.update (package:flutter/src/widgets/sliver.dart:955:7)
#38     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#39     Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#40     MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#41     _ViewportElement.update (package:flutter/src/widgets/viewport.dart:293:11)
#42     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#43     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#44     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#45     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#46     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#47     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#48     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#49     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#50     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#51     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#52     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#53     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#54     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#55     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#56     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#57     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#58     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#59     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#60     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#61     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#62     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#63     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#64     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#65     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#66     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#67     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#68     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#69     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#70     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#71     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#72     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#73     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#74     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#75     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#76     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#77     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#78     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#79     StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#80     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#81     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#82     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#83     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#84     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#85     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#86     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#87     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#88     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#89     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#90     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#91     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#92     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#93     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#94     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#95     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#96     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#97     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#98     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#99     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#100    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#101    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#102    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#103    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#104    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#105    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#106    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#107    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#108    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#109    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#110    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#111    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#112    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#113    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#114    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#115    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#116    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#117    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#118    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#119    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#120    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#121    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#122    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#123    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#124    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#125    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#126    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#127    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#128    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#129    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#130    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#131    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#132    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#133    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#134    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#135    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#136    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#137    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#138    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#139    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#140    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#141    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#142    Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#143    MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#144    _ViewportElement.update (package:flutter/src/widgets/viewport.dart:293:11)
#145    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#146    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#147    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#148    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#149    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#150    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#151    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#152    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#153    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#154    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#155    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#156    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#157    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#158    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#159    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#160    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#161    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#162    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#163    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#164    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#165    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#166    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#167    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#168    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#169    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#170    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#171    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#172    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#173    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#174    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#175    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#176    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#177    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#178    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#179    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#180    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#181    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#182    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#183    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#184    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#185    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#186    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#187    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#188    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#189    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#190    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#191    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#192    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#193    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#194    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#195    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#196    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#197    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#198    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#199    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#200    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#201    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#202    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#203    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#204    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#205    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#206    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#207    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#208    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#209    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#210    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#211    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#212    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#213    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#214    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#215    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#216    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#217    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#218    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#219    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#220    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#221    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#222    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#223    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#224    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#225    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#226    Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#227    MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#228    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#229    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#230    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#231    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#232    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#233    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#234    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#235    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#236    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#237    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#238    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#239    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#240    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#241    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#242    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#243    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#244    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#245    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#246    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#247    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#248    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#249    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#250    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#251    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#252    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#253    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#254    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#255    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#256    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#257    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#258    BuildScope._tryRebuild (package:flutter/src/widgets/framework.dart:2750:15)
#259    BuildScope._flushDirtyElements (package:flutter/src/widgets/framework.dart:2807:11)
#260    BuildOwner.buildScope (package:flutter/src/widgets/framework.dart:3111:18)
#261    WidgetsBinding.drawFrame (package:flutter/src/widgets/binding.dart:1571:21)
#262    RendererBinding._handlePersistentFrameCallback (package:flutter/src/rendering/binding.dart:509:5)
#263    SchedulerBinding._invokeFrameCallback (package:flutter/src/scheduler/binding.dart:1430:15)
#264    SchedulerBinding.handleDrawFrame (package:flutter/src/scheduler/binding.dart:1345:9)
#265    SchedulerBinding._handleDrawFrame (package:flutter/src/scheduler/binding.dart:1198:5)
#266    _rootRun (dart:async/zone_root.dart:35:13)
#267    _CustomZone.run (dart:async/zone.dart:726:19)
#268    _CustomZone.runGuarded (dart:async/zone.dart:625:7)
#269    _invoke (dart:ui/hooks.dart:425:10)
#270    PlatformDispatcher._drawFrame (dart:ui/platform_dispatcher.dart:447:5)
#271    _drawFrame (dart:ui/hooks.dart:395:31)

16:08:44.779980 ERROR [widgets library] Null check operator used on a null value

Null check operator used on a null value

#0      _TrainingDayItemState.build (package:testapp/features/calendar_page/presentation/widgets/day_details/training_day_item.dart:56:43)
#1      StatefulElement.build (package:flutter/src/widgets/framework.dart:5931:27)
#2      ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5817:15)
#3      StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#4      Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#5      StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#6      Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#7      SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#8      Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#9      SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#10     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#11     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#12     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#13     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#14     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#15     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#16     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#17     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#18     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#19     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#20     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#21     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#22     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#23     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#24     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#25     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#26     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#27     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#28     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#29     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#30     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#31     StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#32     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#33     SliverMultiBoxAdaptorElement.updateChild (package:flutter/src/widgets/sliver.dart:1086:37)
#34     SliverMultiBoxAdaptorElement.performRebuild.processElement (package:flutter/src/widgets/sliver.dart:979:35)
#35     Iterable.forEach (dart:core/iterable.dart:366:35)
#36     SliverMultiBoxAdaptorElement.performRebuild (package:flutter/src/widgets/sliver.dart:1032:24)
#37     SliverMultiBoxAdaptorElement.update (package:flutter/src/widgets/sliver.dart:955:7)
#38     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#39     Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#40     MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#41     _ViewportElement.update (package:flutter/src/widgets/viewport.dart:293:11)
#42     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#43     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#44     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#45     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#46     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#47     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#48     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#49     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#50     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#51     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#52     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#53     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#54     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#55     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#56     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#57     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#58     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#59     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#60     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#61     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#62     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#63     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#64     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#65     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#66     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#67     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#68     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#69     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#70     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#71     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#72     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#73     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#74     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#75     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#76     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#77     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#78     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#79     StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#80     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#81     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#82     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#83     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#84     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#85     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#86     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#87     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#88     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#89     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#90     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#91     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#92     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#93     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#94     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#95     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#96     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#97     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#98     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#99     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#100    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#101    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#102    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#103    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#104    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#105    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#106    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#107    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#108    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#109    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#110    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#111    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#112    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#113    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#114    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#115    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#116    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#117    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#118    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#119    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#120    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#121    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#122    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#123    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#124    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#125    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#126    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#127    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#128    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#129    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#130    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#131    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#132    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#133    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#134    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#135    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#136    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#137    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#138    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#139    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#140    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#141    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#142    Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#143    MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#144    _ViewportElement.update (package:flutter/src/widgets/viewport.dart:293:11)
#145    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#146    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#147    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#148    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#149    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#150    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#151    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#152    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#153    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#154    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#155    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#156    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#157    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#158    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#159    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#160    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#161    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#162    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#163    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#164    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#165    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#166    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#167    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#168    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#169    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#170    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#171    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#172    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#173    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#174    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#175    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#176    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#177    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#178    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#179    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#180    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#181    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#182    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#183    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#184    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#185    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#186    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#187    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#188    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#189    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#190    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#191    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#192    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#193    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#194    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#195    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#196    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#197    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#198    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#199    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#200    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#201    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#202    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#203    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#204    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#205    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#206    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#207    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#208    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#209    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#210    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#211    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#212    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#213    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#214    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#215    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#216    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#217    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#218    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#219    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#220    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#221    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#222    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#223    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#224    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#225    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#226    Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#227    MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#228    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#229    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#230    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#231    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#232    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#233    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#234    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#235    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#236    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#237    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#238    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#239    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#240    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#241    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#242    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#243    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#244    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#245    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#246    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#247    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#248    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#249    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#250    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#251    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#252    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#253    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#254    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#255    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#256    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#257    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#258    BuildScope._tryRebuild (package:flutter/src/widgets/framework.dart:2750:15)
#259    BuildScope._flushDirtyElements (package:flutter/src/widgets/framework.dart:2807:11)
#260    BuildOwner.buildScope (package:flutter/src/widgets/framework.dart:3111:18)
#261    WidgetsBinding.drawFrame (package:flutter/src/widgets/binding.dart:1571:21)
#262    RendererBinding._handlePersistentFrameCallback (package:flutter/src/rendering/binding.dart:509:5)
#263    SchedulerBinding._invokeFrameCallback (package:flutter/src/scheduler/binding.dart:1430:15)
#264    SchedulerBinding.handleDrawFrame (package:flutter/src/scheduler/binding.dart:1345:9)
#265    SchedulerBinding._handleDrawFrame (package:flutter/src/scheduler/binding.dart:1198:5)
#266    _rootRun (dart:async/zone_root.dart:35:13)
#267    _CustomZone.run (dart:async/zone.dart:726:19)
#268    _CustomZone.runGuarded (dart:async/zone.dart:625:7)
#269    _invoke (dart:ui/hooks.dart:425:10)
#270    PlatformDispatcher._drawFrame (dart:ui/platform_dispatcher.dart:447:5)
#271    _drawFrame (dart:ui/hooks.dart:395:31)

16:08:44.846672 ERROR [widgets library] Null check operator used on a null value

Null check operator used on a null value

#0      _TrainingDayItemState.build (package:testapp/features/calendar_page/presentation/widgets/day_details/training_day_item.dart:56:43)
#1      StatefulElement.build (package:flutter/src/widgets/framework.dart:5931:27)
#2      ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5817:15)
#3      StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#4      Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#5      StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#6      Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#7      SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#8      Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#9      SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#10     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#11     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#12     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#13     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#14     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#15     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#16     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#17     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#18     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#19     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#20     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#21     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#22     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#23     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#24     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#25     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#26     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#27     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#28     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#29     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#30     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#31     StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#32     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#33     SliverMultiBoxAdaptorElement.updateChild (package:flutter/src/widgets/sliver.dart:1086:37)
#34     SliverMultiBoxAdaptorElement.performRebuild.processElement (package:flutter/src/widgets/sliver.dart:979:35)
#35     Iterable.forEach (dart:core/iterable.dart:366:35)
#36     SliverMultiBoxAdaptorElement.performRebuild (package:flutter/src/widgets/sliver.dart:1032:24)
#37     SliverMultiBoxAdaptorElement.update (package:flutter/src/widgets/sliver.dart:955:7)
#38     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#39     Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#40     MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#41     _ViewportElement.update (package:flutter/src/widgets/viewport.dart:293:11)
#42     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#43     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#44     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#45     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#46     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#47     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#48     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#49     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#50     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#51     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#52     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#53     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#54     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#55     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#56     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#57     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#58     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#59     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#60     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#61     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#62     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#63     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#64     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#65     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#66     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#67     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#68     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#69     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#70     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#71     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#72     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#73     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#74     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#75     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#76     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#77     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#78     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#79     StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#80     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#81     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#82     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#83     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#84     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#85     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#86     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#87     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#88     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#89     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#90     ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#91     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#92     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#93     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#94     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#95     StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#96     Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#97     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#98     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#99     Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#100    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#101    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#102    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#103    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#104    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#105    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#106    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#107    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#108    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#109    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#110    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#111    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#112    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#113    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#114    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#115    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#116    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#117    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#118    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#119    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#120    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#121    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#122    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#123    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#124    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#125    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#126    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#127    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#128    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#129    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#130    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#131    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#132    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#133    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#134    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#135    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#136    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#137    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#138    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#139    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#140    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#141    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#142    Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#143    MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#144    _ViewportElement.update (package:flutter/src/widgets/viewport.dart:293:11)
#145    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#146    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#147    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#148    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#149    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#150    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#151    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#152    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#153    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#154    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#155    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#156    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#157    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#158    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#159    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#160    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#161    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#162    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#163    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#164    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#165    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#166    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#167    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#168    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#169    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#170    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#171    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#172    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#173    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#174    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#175    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#176    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#177    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#178    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#179    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#180    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#181    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#182    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#183    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#184    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#185    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#186    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#187    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#188    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#189    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#190    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#191    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#192    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#193    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#194    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#195    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#196    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#197    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#198    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#199    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#200    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#201    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#202    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#203    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#204    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#205    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#206    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#207    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#208    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#209    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#210    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#211    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#212    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#213    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#214    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#215    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#216    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#217    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#218    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#219    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#220    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#221    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#222    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#223    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#224    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#225    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#226    Element.updateChildren (package:flutter/src/widgets/framework.dart:4191:32)
#227    MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)
#228    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#229    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#230    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#231    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#232    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#233    ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)
#234    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#235    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)
#236    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#237    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#238    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#239    StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)
#240    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#241    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#242    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#243    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#244    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#245    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#246    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#247    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#248    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#249    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#250    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#251    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#252    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)
#253    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#254    StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)
#255    Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)
#256    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)
#257    Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)
#258    BuildScope._tryRebuild (package:flutter/src/widgets/framework.dart:2750:15)
#259    BuildScope._flushDirtyElements (package:flutter/src/widgets/framework.dart:2807:11)
#260    BuildOwner.buildScope (package:flutter/src/widgets/framework.dart:3111:18)
#261    WidgetsBinding.drawFrame (package:flutter/src/widgets/binding.dart:1571:21)
#262    RendererBinding._handlePersistentFrameCallback (package:flutter/src/rendering/binding.dart:509:5)
#263    SchedulerBinding._invokeFrameCallback (package:flutter/src/scheduler/binding.dart:1430:15)
#264    SchedulerBinding.handleDrawFrame (package:flutter/src/scheduler/binding.dart:1345:9)
#265    SchedulerBinding._handleDrawFrame (package:flutter/src/scheduler/binding.dart:1198:5)
#266    _rootRun (dart:async/zone_root.dart:35:13)
#267    _CustomZone.run (dart:async/zone.dart:726:19)
#268    _CustomZone.runGuarded (dart:async/zone.dart:625:7)
#269    _invoke (dart:ui/hooks.dart:425:10)
#270    PlatformDispatcher._drawFrame (dart:ui/platform_dispatcher.dart:447:5)
#271    _drawFrame (dart:ui/hooks.dart:395:31)

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