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Describe the bug
After click the MenuBarItem "File", move mouse from "File" to "Edit", exception occurred. There is the exception below.
# user @ user in /data/user/Projects/flutter/fluent_ui/example on git:master x [0:19:35]
$ flutter run -d linux
Flutter assets will be downloaded from https://storage.flutter-io.cn. Make sure you trust this source!
Launching lib/main.dart on Linux in debug mode...
Building Linux application...
β Built build/linux/x64/debug/bundle/example
Gdk-Message: 00:19:43.416: Unable to load from the cursor theme
Syncing files to device Linux... 69ms
Flutter run key commands.
r Hot reload. π₯π₯π₯
R Hot restart.
h List all available interactive commands.
d Detach (terminate "flutter run" but leave application running).
c Clear the screen
q Quit (terminate the application on the device).
A Dart VM Service on Linux is available at: http://127.0.0.1:37809/NSMencc1R4c=/
The Flutter DevTools debugger and profiler on Linux is available at: http://127.0.0.1:37809/NSMencc1R4c=/devtools/?uri=ws://127.0.0.1:37809/NSMencc1R4c=/ws
The icon button_a is not available in the current context. Please provide a fallback icon or use a different icon.
The icon chat_bubbles is not available in the current context. Please provide a fallback icon or use a different icon.
The icon text_navigate is not available in the current context. Please provide a fallback icon or use a different icon.
The icon surface_hub is not available in the current context. Please provide a fallback icon or use a different icon.
The icon text_edit is not available in the current context. Please provide a fallback icon or use a different icon.
Changed to 17
βββ‘ EXCEPTION CAUGHT BY WIDGETS LIBRARY ββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββ
The following assertion was thrown building _FocusInheritedScope:
A RenderFlex was mutated in _RenderLayoutBuilder.performLayout.
The RenderObject was mutated when none of its ancestors is actively performing layout.
The RenderObject being mutated was:
RenderFlex#cdee5 NEEDS-PAINT NEEDS-COMPOSITING-BITS-UPDATE
The RenderObject that was mutating the said RenderFlex was:
_RenderLayoutBuilder#ac8a0 NEEDS-LAYOUT
The relevant error-causing widget was:
Visibility
Visibility:file:///data/user/Projects/flutter/fluent_ui/lib/src/controls/flyouts/menu_bar.dart:245:33
When the exception was thrown, this was the stack:
#0 RenderObject._debugCanPerformMutations.<anonymous closure> (package:flutter/src/rendering/object.dart:2364:9)#1 RenderObject._debugCanPerformMutations (package:flutter/src/rendering/object.dart:2428:6)#2 RenderObject.markNeedsLayout (package:flutter/src/rendering/object.dart:2661:12)#3 RenderBox.markNeedsLayout (package:flutter/src/rendering/box.dart:2860:11)#4 RenderObject.dropChild (package:flutter/src/rendering/object.dart:2205:5)#5 ContainerRenderObjectMixin.remove (package:flutter/src/rendering/object.dart:4554:5)#6 MultiChildRenderObjectElement.removeRenderObjectChild (package:flutter/src/widgets/framework.dart:7215:18)#7 RenderObjectElement.detachRenderObject (package:flutter/src/widgets/framework.dart:6952:37)#8 Element.detachRenderObject.<anonymous closure> (package:flutter/src/widgets/framework.dart:4460:13)#9 ComponentElement.visitChildren (package:flutter/src/widgets/framework.dart:5871:14)#10 Element.detachRenderObject (package:flutter/src/widgets/framework.dart:4459:5)#11 Element.detachRenderObject.<anonymous closure> (package:flutter/src/widgets/framework.dart:4460:13)#12 ComponentElement.visitChildren (package:flutter/src/widgets/framework.dart:5871:14)#13 Element.detachRenderObject (package:flutter/src/widgets/framework.dart:4459:5)#14 Element.detachRenderObject.<anonymous closure> (package:flutter/src/widgets/framework.dart:4460:13)#15 ComponentElement.visitChildren (package:flutter/src/widgets/framework.dart:5871:14)#16 Element.detachRenderObject (package:flutter/src/widgets/framework.dart:4459:5)#17 Element.deactivateChild (package:flutter/src/widgets/framework.dart:4635:11)#18 Element._retakeInactiveElement (package:flutter/src/widgets/framework.dart:4529:14)#19 Element.inflateWidget (package:flutter/src/widgets/framework.dart:4572:13)#20 MultiChildRenderObjectElement.inflateWidget (package:flutter/src/widgets/framework.dart:7264:36)#21 Element.updateChild (package:flutter/src/widgets/framework.dart:4059:18)#22 Element.updateChildren (package:flutter/src/widgets/framework.dart:4255:32)#23 MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7295:17)#24 Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)#25 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)#26 Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)#27 ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)#28 _InheritedNotifierElement.update (package:flutter/src/widgets/inherited_notifier.dart:108:11)#29 Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)#30 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)#31 StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)#32 Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)#33 StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)#34 Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)#35 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)#36 Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)#37 StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)#38 Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)#39 SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)#40 Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)#41 SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)#42 Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)#43 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)#44 Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)#45 ProxyElement.update (package:flutter/src/widgets/framework.dart:6149:5)#46 Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)#47 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)#48 Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)#49 StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)#50 Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)#51 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)#52 Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)#53 StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)#54 Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)#55 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)#56 StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5982:11)#57 Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)#58 StatefulElement.update (package:flutter/src/widgets/framework.dart:6007:5)#59 Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)#60 SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)#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 SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7122:14)#65 Element.updateChild (package:flutter/src/widgets/framework.dart:4037:15)#66 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5841:16)#67 Element.rebuild (package:flutter/src/widgets/framework.dart:5529:7)#68 StatelessElement.update (package:flutter/src/widgets/framework.dart:5895:5)#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 BuildScope._tryRebuild (package:flutter/src/widgets/framework.dart:2750:15)#76 BuildScope._flushDirtyElements (package:flutter/src/widgets/framework.dart:2807:11)#77 BuildOwner.buildScope (package:flutter/src/widgets/framework.dart:3111:18)#78 _LayoutBuilderElement._rebuildWithConstraints (package:flutter/src/widgets/layout_builder.dart:270:12)#79 RenderAbstractLayoutBuilderMixin.layoutCallback (package:flutter/src/widgets/layout_builder.dart:333:38)#80 RenderObjectWithLayoutCallbackMixin.runLayoutCallback.<anonymous closure> (package:flutter/src/rendering/object.dart:4302:33)#81 RenderObject.invokeLayoutCallback.<anonymous closure> (package:flutter/src/rendering/object.dart:3026:17)#82 PipelineOwner._enableMutationsToDirtySubtrees (package:flutter/src/rendering/object.dart:1223:15)#83 RenderObject.invokeLayoutCallback (package:flutter/src/rendering/object.dart:3025:14)#84 RenderObjectWithLayoutCallbackMixin.runLayoutCallback (package:flutter/src/rendering/object.dart:4302:5)#85 _RenderLayoutBuilder.performLayout (package:flutter/src/widgets/layout_builder.dart:447:5)#86 RenderObject._layoutWithoutResize (package:flutter/src/rendering/object.dart:2755:7)#87 PipelineOwner.flushLayout (package:flutter/src/rendering/object.dart:1174:18)#88 PipelineOwner.flushLayout (package:flutter/src/rendering/object.dart:1187:15)#89 RendererBinding.drawFrame (package:flutter/src/rendering/binding.dart:643:23)#90 WidgetsBinding.drawFrame (package:flutter/src/widgets/binding.dart:1573:13)#91 RendererBinding._handlePersistentFrameCallback (package:flutter/src/rendering/binding.dart:509:5)#92 SchedulerBinding._invokeFrameCallback (package:flutter/src/scheduler/binding.dart:1430:15)#93 SchedulerBinding.handleDrawFrame (package:flutter/src/scheduler/binding.dart:1345:9)#94 SchedulerBinding._handleDrawFrame (package:flutter/src/scheduler/binding.dart:1198:5)#95 _invoke (dart:ui/hooks.dart:423:13)#96 PlatformDispatcher._drawFrame (dart:ui/platform_dispatcher.dart:447:5)#97 _drawFrame (dart:ui/hooks.dart:395:31)
ββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββ
Another exception was thrown: Duplicate GlobalKey detected in widget tree.
Another exception was thrown: 'package:flutter/src/widgets/framework.dart': Failed assertion: line 2168 pos 12: '_elements.contains(element)': is not true.
Another exception was thrown: 'package:flutter/src/widgets/framework.dart': Failed assertion: line 6268 pos 12: '_dependents.isEmpty': is not true.
Application finished.
To Reproduce
Steps to reproduce the behavior:
Run the example
Go to 'Dialogs & flyouts'
Click MenuBarItem "File", then move mouse to MenuBarItem "Edit"
Describe the bug
After click the
MenuBarItem"File", move mouse from "File" to "Edit", exception occurred. There is the exception below.To Reproduce
Steps to reproduce the behavior:
exampleMenuBarItem"File", then move mouse toMenuBarItem"Edit"Expected behavior
#1178 (comment)
Screenshots
record-2026-06-13_00-20-50.mp4
Additional context
System Information:
Flutter information:
Flutter 3.44.1 β’ channel stable β’ https://github.com/flutter/flutter.git Framework β’ revision 924134a44c (2 ε¨ε) β’ 2026-05-29 12:13:22 -0400 Engine β’ hash 39b1f7043775b9578bbb26a1676e79c4e31c8b5e (revision c416acfeb8) (15 days ago) β’ 2026-05-27 20:19:31.000Z Tools β’ Dart 3.12.1 β’ DevTools 2.57.0