Failed assertion

[stfn3000]

Hello, I received a bug and got the following message encouraging me to report here, so I am:

======== Exception caught by widgets library =======================================================
The following assertion was thrown building Navigator-[GlobalObjectKey<NavigatorState> _WidgetsAppState#589fe](dirty, dependencies: [UnmanagedRestorationScope, HeroControllerScope], state: NavigatorState#548b9(tickers: tracking 4 tickers)):
'package:flutter/src/widgets/navigator.dart': Failed assertion: line 5307 pos 12: '!_debugLocked': is not true.


Either the assertion indicates an error in the framework itself, or we should provide substantially more information in this error message to help you determine and fix the underlying cause.
In either case, please report this assertion by filing a bug on GitHub:
  https://github.com/flutter/flutter/issues/new?template=2_bug.md

The relevant error-causing widget was: 
  MaterialApp file:///D:/AndroidStudioProjectsAndAssets/projectapp/lib/main.dart:42:20
When the exception was thrown, this was the stack: 
#2      NavigatorState.build (package:flutter/src/widgets/navigator.dart:5307:12)
#3      StatefulElement.build (package:flutter/src/widgets/framework.dart:4691:27)
#4      ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:4574:15)
#5      StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:4746:11)
#6      Element.rebuild (package:flutter/src/widgets/framework.dart:4267:5)
...
====================================================================================================

[bernaferrari]

Do you have a reproducible sample? And what is the flutter doctor -v?

[TahaTesser]

Hi @stfn3000
Can you please provide your flutter doctor -v, a complete reproducible minimal code sample, and complete flutter run --verbose logs running the minimal code sample?
Thank you

[danagbemava-nc]

Without additional information, we are unfortunately not sure how to resolve this issue.
We are therefore reluctantly going to close this bug for now.
Please don't hesitate to comment on the bug if you have any more information for us; we will reopen it right away!
Thanks for your contribution.

Could everyone who still has this problem please file a new issue with the exact description of what happens, logs, and the output of flutter doctor -v.
All system setups can be slightly different, so it's always better to open new issues and reference related issues.

[github-actions]

This thread has been automatically locked since there has not been any recent activity after it was closed. If you are still experiencing a similar issue, please open a new bug, including the output of flutter doctor -v and a minimal reproduction of the issue.