Another exception was thrown: setState() or markNeedsBuild() called when widget tree was locked.

[Erwin Tan]

i got this error when i click textfield inside enddrawer.. i dont understand why and how to fix it.. any suggestion?

[Erwin Tan]

══╡ EXCEPTION CAUGHT BY WIDGETS LIBRARY ╞═══════════════════════════════════════════════════════════

I/flutter (23429): The following assertion was thrown while finalizing the widget tree:

I/flutter (23429): setState() or markNeedsBuild() called when widget tree was locked.

I/flutter (23429): This _ModalScope<dynamic> widget cannot be marked as needing to build because the framework is

I/flutter (23429): locked.

I/flutter (23429): The widget on which setState() or markNeedsBuild() was called was:

I/flutter (23429):   _ModalScope<dynamic>-[LabeledGlobalKey<_ModalScopeState<dynamic>>#7cb51](state:

I/flutter (23429):   _ModalScopeState<dynamic>#411ec)

I/flutter (23429): 

I/flutter (23429): When the exception was thrown, this was the stack:

I/flutter (23429): #0      Element.markNeedsBuild.<anonymous closure> (package:flutter/src/widgets/framework.dart:3453:9)

I/flutter (23429): #1      Element.markNeedsBuild (package:flutter/src/widgets/framework.dart:3462:6)

I/flutter (23429): #2      State.setState (package:flutter/src/widgets/framework.dart:1141:14)

I/flutter (23429): #3      _ModalScopeState._routeSetState (package:flutter/src/widgets/routes.dart:464:5)

I/flutter (23429): #4      ModalRoute.setState (package:flutter/src/widgets/routes.dart:562:30)

I/flutter (23429): #5      ModalRoute.changedInternalState (package:flutter/src/widgets/routes.dart:1018:5)

I/flutter (23429): #6      _ModalRoute&TransitionRoute&LocalHistoryRoute.removeLocalHistoryEntry (package:flutter/src/widgets/routes.dart:348:7)

I/flutter (23429): #7      LocalHistoryEntry.remove (package:flutter/src/widgets/routes.dart:296:12)

I/flutter (23429): #8      DrawerControllerState.dispose (package:flutter/src/material/drawer.dart:201:20)

I/flutter (23429): #9      StatefulElement.unmount (package:flutter/src/widgets/framework.dart:3821:12)

I/flutter (23429): #10     _InactiveElements._unmount (package:flutter/src/widgets/framework.dart:1697:13)

I/flutter (23429): #11     _InactiveElements._unmount.<anonymous closure> (package:flutter/src/widgets/framework.dart:1695:7)

I/flutter (23429): #12     ComponentElement.visitChildren (package:flutter/src/widgets/framework.dart:3676:14)

I/flutter (23429): #13     _InactiveElements._unmount (package:flutter/src/widgets/framework.dart:1693:13)

I/flutter (23429): #14     _InactiveElements._unmount.<anonymous closure> (package:flutter/src/widgets/framework.dart:1695:7)

I/flutter (23429): #15     ComponentElement.visitChildren (package:flutter/src/widgets/framework.dart:3676:14)

I/flutter (23429): #16     _InactiveElements._unmount (package:flutter/src/widgets/framework.dart:1693:13)

I/flutter (23429): #17     _InactiveElements._unmount.<anonymous closure> (package:flutter/src/widgets/framework.dart:1695:7)

I/flutter (23429): #18     MultiChildRenderObjectElement.visitChildren (package:flutter/src/widgets/framework.dart:4742:16)

I/flutter (23429): #19     _InactiveElements._unmount (package:flutter/src/widgets/framework.dart:1693:13)

I/flutter (23429): #20     _InactiveElements._unmount.<anonymous closure> (package:flutter/src/widgets/framework.dart:1695:7)

I/flutter (23429): #21     ComponentElement.visitChildren (package:flutter/src/widgets/framework.dart:3676:14)

I/flutter (23429): #22     _InactiveElements._unmount (package:flutter/src/widgets/framework.dart:1693:13)

I/flutter (23429): #23     _InactiveElements._unmount.<anonymous closure> (package:flutter/src/widgets/framework.dart:1695:7)

I/flutter (23429): #24     ComponentElement.visitChildren (package:flutter/src/widgets/framework.dart:3676:14)

I/flutter (23429): #25     _InactiveElements._unmount (package:flutter/src/widgets/framework.dart:1693:13)

I/flutter (23429): #26     _InactiveElements._unmount.<anonymous closure> (package:flutter/src/widgets/framework.dart:1695:7)

I/flutter (23429): #27     ComponentElement.visitChildren (package:flutter/src/widgets/framework.dart:3676:14)

I/flutter (23429): #28     _InactiveElements._unmount (package:flutter/src/widgets/framework.dart:1693:13)

I/flutter (23429): #29     _InactiveElements._unmount.<anonymous closure> (package:flutter/src/widgets/framework.dart:1695:7)

I/flutter (23429): #30     SingleChildRenderObjectElement.visitChildren (package:flutter/src/widgets/framework.dart:4642:14)

I/flutter (23429): #31     _InactiveElements._unmount (package:flutter/src/widgets/framework.dart:1693:13)

I/flutter (23429): #32     _InactiveElements._unmount.<anonymous closure> (package:flutter/src/widgets/framework.dart:1695:7)

I/flutter (23429): #33     ComponentElement.visitChildren (package:flutter/src/widgets/framework.dart:3676:14)

I/flutter (23429): #34     _InactiveElements._unmount (package:flutter/src/widgets/framework.dart:1693:13)

I/flutter (23429): #35     _InactiveElements._unmount.<anonymous closure> (package:flutter/src/widgets/framework.dart:1695:7)

I/flutter (23429): #36     SingleChildRenderObjectElement.visitChildren (package:flutter/src/widgets/framework.dart:4642:14)

I/flutter (23429): #37     _InactiveElements._unmount (package:flutter/src/widgets/framework.dart:1693:13)

I/flutter (23429): #38     _InactiveElements._unmount.<anonymous closure> (package:flutter/src/widgets/framework.dart:1695:7)

I/flutter (23429): #39     ComponentElement.visitChildren (package:flutter/src/widgets/framework.dart:3676:14)

I/flutter (23429): #40     _InactiveElements._unmount (package:flutter/src/widgets/framework.dart:1693:13)

I/flutter (23429): #41     _InactiveElements._unmount.<anonymous closure> (package:flutter/src/widgets/framework.dart:1695:7)

I/flutter (23429): #42     ComponentElement.visitChildren (package:flutter/src/widgets/framework.dart:3676:14)

I/flutter (23429): #43     _InactiveElements._unmount (package:flutter/src/widgets/framework.dart:1693:13)

I/flutter (23429): #44     _InactiveElements._unmount.<anonymous closure> (package:flutter/src/widgets/framework.dart:1695:7)

I/flutter (23429): #45     ComponentElement.visitChildren (package:flutter/src/widgets/framework.dart:3676:14)

I/flutter (23429): #46     _InactiveElements._unmount (package:flutter/src/widgets/framework.dart:1693:13)

I/flutter (23429): #47     _InactiveElements._unmount.<anonymous closure> (package:flutter/src/widgets/framework.dart:1695:7)

I/flutter (23429): #48     ComponentElement.visitChildren (package:flutter/src/widgets/framework.dart:3676:14)

I/flutter (23429): #49     _InactiveElements._unmount (package:flutter/src/widgets/framework.dart:1693:13)

I/flutter (23429): #50     _InactiveElements._unmount.<anonymous closure> (package:flutter/src/widgets/framework.dart:1695:7)

I/flutter (23429): #51     ComponentElement.visitChildren (package:flutter/src/widgets/framework.dart:3676:14)

I/flutter (23429): #52     _InactiveElements._unmount (package:flutter/src/widgets/framework.dart:1693:13)

I/flutter (23429): #53     ListIterable.forEach (dart:_internal/iterable.dart:39:13)

I/flutter (23429): #54     _InactiveElements._unmountAll (package:flutter/src/widgets/framework.dart:1706:25)

I/flutter (23429): #55     BuildOwner.finalizeTree.<anonymous closure> (package:flutter/src/widgets/framework.dart:2328:27)

I/flutter (23429): #56     BuildOwner.lockState (package:flutter/src/widgets/framework.dart:2160:15)

I/flutter (23429): #57     BuildOwner.finalizeTree (package:flutter/src/widgets/framework.dart:2327:7)

I/flutter (23429): #58     _WidgetsFlutterBinding&BindingBase&GestureBinding&ServicesBinding&SchedulerBinding&PaintingBinding&RendererBinding&WidgetsBinding.drawFrame (package:flutter/src/widgets/binding.dart:628:18)

I/flutter (23429): #59     _WidgetsFlutterBinding&BindingBase&GestureBinding&ServicesBinding&SchedulerBinding&PaintingBinding&RendererBinding._handlePersistentFrameCallback (package:flutter/src/rendering/binding.dart:208:5)

I/flutter (23429): #60     _WidgetsFlutterBinding&BindingBase&GestureBinding&ServicesBinding&SchedulerBinding._invokeFrameCallback (package:flutter/src/scheduler/binding.dart:990:15)

I/flutter (23429): #61     _WidgetsFlutterBinding&BindingBase&GestureBinding&ServicesBinding&SchedulerBinding.handleDrawFrame (package:flutter/src/scheduler/binding.dart:930:9)

I/flutter (23429): #62     _WidgetsFlutterBinding&BindingBase&GestureBinding&ServicesBinding&SchedulerBinding.scheduleWarmUpFrame.<anonymous closure> (package:flutter/src/scheduler/binding.dart:751:7)

I/flutter (23429): #64     _Timer._runTimers (dart:isolate/runtime/libtimer_impl.dart:382:19)

I/flutter (23429): #65     _Timer._handleMessage (dart:isolate/runtime/libtimer_impl.dart:416:5)

I/flutter (23429): #66     _RawReceivePortImpl._handleMessage (dart:isolate/runtime/libisolate_patch.dart:165:12)

I/flutter (23429): (elided one frame from package dart:async)

I/flutter (23429): ════════════════════════════════════════════════════════════════════════════════════════════════════

I/flutter (23429): Another exception was thrown: 'package:flutter/src/widgets/framework.dart': Failed assertion: line 3424 pos 12: '_debugLifecycleState != _ElementLifecycle.defunct': is not true.

Reloaded 5 of 731 libraries in 1,549ms.

I/flutter (23429): Another exception was thrown: 'package:flutter/src/widgets/framework.dart': Failed assertion: line 3424 pos 12: '_debugLifecycleState != _ElementLifecycle.defunct': is not true.

I/flutter (23429): Another exception was thrown: 'package:flutter/src/widgets/framework.dart': Failed assertion: line 3424 pos 12: '_debugLifecycleState != _ElementLifecycle.defunct': is not true.

I/flutter (23429): Another exception was thrown: 'package:flutter/src/widgets/framework.dart': Failed assertion: line 3424 pos 12: '_debugLifecycleState != _ElementLifecycle.defunct': is not true

[Ian Hickson]

Looks like a bug; if you can file it with sample code showing how to reproduce it, that would be great. Thanks!

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Ian Hickson

😸