_CastError: Null check operator used on a null value after resuming an app from the background #100777
Description
Steps to Reproduce
This is an automated anonymous crash report.
According to breadcrumbs, it happened a dozen seconds after resuming an app from the background.
1 second before the exception there are 2 entries like that (sentry breadcrumbs):
Another exception was thrown: Instance of 'DiagnosticsProperty<void>'
Expected results:
No exception is thrown.
Actual results:
_CastError: Null check operator used on a null value
File "framework.dart", line 3087, in Element.widget
File "framework.dart", line 4929, in ProxyElement.widget
File "framework.dart", line 5036, in InheritedElement.widget
File "inherited_notifier.dart", line 99, in _InheritedNotifierElement.widget
File "framework.dart", line 4014, in Element.dependOnInheritedElement
File "framework.dart", line 4886, in StatefulElement.dependOnInheritedElement
File "framework.dart", line 4022, in Element.dependOnInheritedWidgetOfExactType
File "focus_scope.dart", line 391, in Focus.maybeOf
File "focus_manager.dart", line 214, in FocusAttachment.reparent
File "focus_scope.dart", line 550, in _FocusState.deactivate
File "framework.dart", line 4811, in StatefulElement.deactivate
File "framework.dart", line 1901, in _InactiveElements._deactivateRecursively
File "framework.dart", line 4642, in ComponentElement.visitChildren
File "framework.dart", line 1903, in _InactiveElements._deactivateRecursively
File "framework.dart", line 4642, in ComponentElement.visitChildren
File "framework.dart", line 1903, in _InactiveElements._deactivateRecursively
File "framework.dart", line 4642, in ComponentElement.visitChildren
File "framework.dart", line 1903, in _InactiveElements._deactivateRecursively
File "framework.dart", line 1915, in _InactiveElements.add
File "framework.dart", line 3667, in Element.deactivateChild
File "framework.dart", line 3378, in Element.updateChild
File "framework.dart", line 4613, in ComponentElement.performRebuild
File "framework.dart", line 4763, in StatefulElement.performRebuild
File "framework.dart", line 4311, in Element.rebuild
File "framework.dart", line 2578, in BuildOwner.buildScope
File "binding.dart", line 882, in WidgetsBinding.drawFrame
File "binding.dart", line 363, in RendererBinding._handlePersistentFrameCallback
File "binding.dart", line 1145, in SchedulerBinding._invokeFrameCallback
File "binding.dart", line 1082, in SchedulerBinding.handleDrawFrame
File "binding.dart", line 996, in SchedulerBinding._handleDrawFrame
File "zone.dart", line 1428, in _rootRun
File "zone.dart", line 1328, in _CustomZone.run
File "zone.dart", line 1236, in _CustomZone.runGuarded
File "hooks.dart", line 150, in _invoke
File "platform_dispatcher.dart", line 270, in PlatformDispatcher._drawFrame
File "hooks.dart", line 114, in _drawFrame
Code sample
No app code is involved. Check `Element` in this repo.Logs
N/A
No issues found!
App was built on CI, some time ago, so I could not execute shell commands. However, here is the relevant part of the log which is available:
Flutter 2.8.1 • channel unknown • unknown source
Framework • revision 77d935af4d (3 months ago) • 2021-12-16 08:37:33 -0800
Engine • revision 890a5fca2e
Tools • Dart 2.15.1
Device: Huawei VOG-L29
Android 10