Cannot reuse a MaterialPageRoute<dynamic> after disposing it. #27334

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1. zoechi

   added

   c: crashStack traces logged to the consoleStack traces logged to the console

   customer: galleryRelating to flutter/gallery repository. Please transfer non-framework issues there.Relating to flutter/gallery repository. Please transfer non-framework issues there.

   f: routesNavigator, Router, and related APIs.Navigator, Router, and related APIs.

   team: flakes

   on Jan 31, 2019
2. zoechi

   added this to the GoalsThis milestone has been deleted milestone on Jan 31, 2019
3. zoechi

   added

   p: cupertino_uicupertino_ui package in flutter/packagescupertino_ui package in flutter/packages

   c: contributor-productivityTeam-specific productivity, code health, technical debt.Team-specific productivity, code health, technical debt.

   frameworkflutter/packages/flutter repository. See also f: labels.flutter/packages/flutter repository. See also f: labels.

   on Jan 31, 2019
4. genesiscz commented on Feb 10, 2019

   

   genesiscz

   on Feb 10, 2019

   More actions

   I am also getting this. I navigate user from Login to Profile if the user have been already logged in by Navigator.pushReplacementNamed(context, "/profile");. It correctly redirects to login, but when I Navigate back with Navigator.pushReplacementNamed(context, "/login"); and then try to navigate back to profile after logging in, I get this error

   [VERBOSE-2:shell.cc(186)] Dart Error: Unhandled exception:
   'package:flutter/src/widgets/routes.dart': Failed assertion: line 226 pos 12: '!_transitionCompleter.isCompleted': Cannot reuse a MaterialPageRoute<dynamic> after disposing it.
   #0      _AssertionError._doThrowNew (dart:core/runtime/liberrors_patch.dart:40:39)
   #1      _AssertionError._throwNew (dart:core/runtime/liberrors_patch.dart:36:5)
   #2      TransitionRoute.didChangeNext (package:flutter/src/widgets/routes.dart:226:12)
   #3      NavigatorState.pushReplacement (package:flutter/src/widgets/navigator.dart:1631:27)
   #4      NavigatorState.pushReplacementNamed (package:flutter/src/widgets/navigator.dart:1494:12)
   #5      Navigator.pushReplacementNamed (package:flutter/src/widgets/navigator.dart:788:34)
   #6      __LoginScreenState&State&BaseState.redirectToProfile (package:mobile/main.dart:59:15)
   #7      _LoginScreenState.doLogin.<anonymous closure> (package:mobile/Screens/login.dart:69:9)
   #8      Api.login (package:mobile/Api.dart:34:11)
   <asynchron<…>
   flutter: ══╡ EXCEPTION CAUGHT BY WIDGETS LIBRARY ╞═══════════════════════════════════════════════════════════
   flutter: The following assertion was thrown building Navigator-[GlobalObjectKey<NavigatorState>
   flutter: _WidgetsAppState#3e2b3](dirty, state: NavigatorState#0518a(tickers: tracking 2 tickers)):
   flutter: 'package:flutter/src/widgets/navigator.dart': Failed assertion: line 1995 pos 12: '!_debugLocked':
   flutter: is not true.
   flutter:
   flutter: Either the assertion indicates an error in the framework itself, or we should provide substantially
   flutter: more information in this error message to help you determine and fix the underlying cause.
   flutter: In either case, please report this assertion by filing a bug on GitHub:
   flutter:   https://github.com/flutter/flutter/issues/new?template=BUG.md
   flutter:
   flutter: When the exception was thrown, this was the stack:
   flutter: #2      NavigatorState.build (package:flutter/src/widgets/navigator.dart:1995:12)
   flutter: #3      StatefulElement.build (package:flutter/src/widgets/framework.dart:3809:27)
   flutter: #4      ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3721:15)
   flutter: #5      Element.rebuild (package:flutter/src/widgets/framework.dart:3547:5)
   flutter: #6      StatefulElement.update (package:flutter/src/widgets/framework.dart:3878:5)
   flutter: #7      Element.updateChild (package:flutter/src/widgets/framework.dart:2742:15)
   flutter: #8      ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3732:16)
   flutter: #9      Element.rebuild (package:flutter/src/widgets/framework.dart:3547:5)
   flutter: #10     ProxyElement.update (package:flutter/src/widgets/framework.dart:3990:5)
   flutter: #11     Element.updateChild (package:flutter/src/widgets/framework.dart:2742:15)
   flutter: #12     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:4867:14)
   flutter: #13     Element.updateChild (package:flutter/src/widgets/framework.dart:2742:15)
   flutter: #14     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3732:16)
   flutter: #15     Element.rebuild (package:flutter/src/widgets/framework.dart:3547:5)
   flutter: #16     StatelessElement.update (package:flutter/src/widgets/framework.dart:3781:5)
   flutter: #17     Element.updateChild (package:flutter/src/widgets/framework.dart:2742:15)
   flutter: #18     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3732:16)
   flutter: #19     Element.rebuild (package:flutter/src/widgets/framework.dart:3547:5)
   flutter: #20     StatelessElement.update (package:flutter/src/widgets/framework.dart:3781:5)
   flutter: #21     Element.updateChild (package:flutter/src/widgets/framework.dart:2742:15)
   flutter: #22     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3732:16)
   flutter: #23     Element.rebuild (package:flutter/src/widgets/framework.dart:3547:5)
   flutter: #24     StatelessElement.update (package:flutter/src/widgets/framework.dart:3781:5)
   flutter: #25     Element.updateChild (package:flutter/src/widgets/framework.dart:2742:15)
   flutter: #26     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3732:16)
   flutter: #27     Element.rebuild (package:flutter/src/widgets/framework.dart:3547:5)
   flutter: #28     ProxyElement.update (package:flutter/src/widgets/framework.dart:3990:5)
   flutter: #29     Element.updateChild (package:flutter/src/widgets/framework.dart:2742:15)
   flutter: #30     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3732:16)
   flutter: #31     Element.rebuild (package:flutter/src/widgets/framework.dart:3547:5)
   flutter: #32     ProxyElement.update (package:flutter/src/widgets/framework.dart:3990:5)
   flutter: #33     Element.updateChild (package:flutter/src/widgets/framework.dart:2742:15)
   flutter: #34     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:4867:14)
   flutter: #35     Element.updateChild (package:flutter/src/widgets/framework.dart:2742:15)
   flutter: #36     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3732:16)
   flutter: #37     Element.rebuild (package:flutter/src/widgets/framework.dart:3547:5)
   flutter: #38     StatefulElement.update (package:flutter/src/widgets/framework.dart:3878:5)
   flutter: #39     Element.updateChild (package:flutter/src/widgets/framework.dart:2742:15)
   flutter: #40     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3732:16)
   flutter: #41     Element.rebuild (package:flutter/src/widgets/framework.dart:3547:5)
   flutter: #42     ProxyElement.update (package:flutter/src/widgets/framework.dart:3990:5)
   flutter: #43     Element.updateChild (package:flutter/src/widgets/framework.dart:2742:15)
   flutter: #44     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3732:16)
   flutter: #45     Element.rebuild (package:flutter/src/widgets/framework.dart:3547:5)
   flutter: #46     BuildOwner.buildScope (package:flutter/src/widgets/framework.dart:2286:33)
   flutter: #47     _WidgetsFlutterBinding&BindingBase&GestureBinding&ServicesBinding&SchedulerBinding&PaintingBinding&SemanticsBinding&RendererBinding&WidgetsBinding.drawFrame (package:flutter/src/widgets/binding.dart:685:20)
   flutter: #48     _WidgetsFlutterBinding&BindingBase&GestureBinding&ServicesBinding&SchedulerBinding&PaintingBinding&SemanticsBinding&RendererBinding._handlePersistentFrameCallback (package:flutter/src/rendering/binding.dart:219:5)
   flutter: #49     _WidgetsFlutterBinding&BindingBase&GestureBinding&ServicesBinding&SchedulerBinding._invokeFrameCallback (package:flutter/src/scheduler/binding.dart:990:15)
   flutter: #50     _WidgetsFlutterBinding&BindingBase&GestureBinding&ServicesBinding&SchedulerBinding.handleDrawFrame (package:flutter/src/scheduler/binding.dart:930:9)
   flutter: #51     _WidgetsFlutterBinding&BindingBase&GestureBinding&ServicesBinding&SchedulerBinding._handleDrawFrame (package:flutter/src/scheduler/binding.dart:842:5)
   flutter: #52     _invoke (dart:ui/hooks.dart:159:13)
   flutter: #53     _drawFrame (dart:ui/hooks.dart:148:3)
   flutter: (elided 2 frames from class _AssertionError)
   flutter: ════════════════════════════════════════════════════════════════════════════════════════════════════
   flutter: Another exception was thrown: setState() called after dispose(): OverlayState#b7857(lifecycle state: defunct, not mounted, tickers: tracking 6 tickers, entries: [OverlayEntry#7a6bc(opaque: true; maintainState: false), OverlayEntry#9dc6f(opaque: false; maintainState: true), OverlayEntry#fba79(opaque: true; maintainState: false), OverlayEntry#34189(opaque: false; maintainState: true)])
   flutter: getProfile ok
   flutter: Martin
   flutter:
   [VERBOSE-2:shell.cc(186)] Dart Error: Unhandled exception:
   setState() called after dispose(): ProfileScreenState#ac0c4(lifecycle state: defunct, not mounted)
   This error happens if you call setState() on a State object for a widget that no longer appears in the widget tree (e.g., whose parent widget no longer includes the widget in its build). This error can occur when code calls setState() from a timer or an animation callback. The preferred solution is to cancel the timer or stop listening to the animation in the dispose() callback. Another solution is to check the "mounted" property of this object before calling setState() to ensure the object is still in the tree.
   This error might indicate a memory leak if setState() is being called because another object is retaining a reference to this State object after it has been removed from the tree. To avoid memory leaks, consider breaking the reference to this object during dispose().
   #0      State.setState.<anonymous closure> (package:flutter/src/widgets<…>
   
5. genesiscz commented on Feb 10, 2019

   

   genesiscz

   on Feb 10, 2019

   More actions

   And just fixed.
   In my logout routine from profile, I have had called Navigator.popAndPushNamed(context, "/login"); instead of Navigator.pushReplacementNamed(context, "/login");.
   When I changed it to the second one, it started to working. Could somebody elaborate why is it the case and what are the differences between these two? @zoechi @Hixie ?
6. xster commented on Feb 12, 2019

   

   xster

   on Feb 12, 2019

   Member

   More actions

   Reminder for future: Matt hypothesizes that the swipe dismiss animation may still be ongoing after a next route has been pushed by tapping the next demo.

   👍React with 👍1Reacted by Ashin Ignatius
7. Shu-Ji commented on Feb 28, 2019

   

   Shu-Ji

   on Feb 28, 2019

   Last edited by Shu-Ji

   More actions

   On my mobile, only CupertinoPageRoute has the problem. And if user presses the back button on Android or clicks a close icon on my page, this bug will not happen.

   It only occurs when user swipe back to the previous page, and before the animation finished, quickly click some link to open a new route again, it crashes.

   After some days, I get it worked:

   STEP 1 —— Define an observer to listen the swipe back gesture:

   class CupertinoSwipeBackObserver extends NavigatorObserver {
     static Completer promise;
   
     @override
     void didStartUserGesture(Route route, Route previousRoute) {
       // make a new promise
       promise = Completer();
       super.didStartUserGesture(route, previousRoute);
     }
   
     @override
     void didStopUserGesture() {
       super.didStopUserGesture();
       // resolve the promise
       promise.complete();
     }
   }

   STEP 2 —— Add the observer in our main.dart:

       MaterialApp(
           ...
           navigatorObservers: <NavigatorObserver>[
             CupertinoSwipeBackObserver(),
           ],
         )

   STEP 3 —— Wait the animation before open a new page

   Future openPage(context, Widget builder) async {
     // wait until animation finished
     await CupertinoSwipeBackObserver.promise?.future;
   
     return await Navigator.of(context).push(
       CupertinoPageRoute(builder: (ctx) => builder),
     );
   }

   STEP 4 —— Usage

   onTap: () async {
       final result = await openPage(context, MyAboutPage())
   }

   👍React with 👍5Reacted by yangxiaoge, Finn, YQjiuhao, 熊孝兵 and Dimitri Staufer
8. HansMuller

   closed this as completedin #28756on Mar 4, 2019
9. TomLiu-GitHub commented on Apr 2, 2019

   

   TomLiu-GitHub

   on Apr 2, 2019

   Last edited by TomLiu-GitHub

   More actions

   The sliding not finished, but you can click back or other at the same time.

   Like this.
   
   

   Is this a bug?@HansMuller
10. xster commented on Apr 3, 2019

    

    xster

    on Apr 3, 2019

    Member

    More actions

    @TomLiu-GitHub I filed a separate bug for it. #30416
11. TomLiu-GitHub commented on Apr 8, 2019

    

    TomLiu-GitHub

    on Apr 8, 2019

    More actions

    This bug not been noticed. I think it's a very serious bug.

    👍React with 👍1Reacted by 涛涛
12. gsy13213009 commented on Oct 12, 2019

    

    gsy13213009

    on Oct 12, 2019

    More actions

    I use Future.dealyed solved this problem

    Future.delayed(Duration(seconds: 0), () {
        ...push....
      });
    

    👎React with 👎2Reacted by Yunus Emre Çetinkaya and NunciosChums

    🚀React with 🚀1Reacted by matthi95
13. github-actions commented on Aug 14, 2021

    

    github-actionsbot

    on Aug 14, 2021

    More 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.
14. github-actions

    locked as resolved and limited conversation to collaborators on Aug 14, 2021
15. flutter-triage-bot

    added

    c: flakeTests that sometimes, but not always, incorrectly passTests that sometimes, but not always, incorrectly pass

    on Jul 7, 2023