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_debugUltimatePreviousSiblingOf(after, equals: _firstChild) is not true. #11895

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#21350
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_debugUltimatePreviousSiblingOf(after, equals: _firstChild) is not true.#11895
#21350
Assignees
dnfield
Labels
c: crashStack traces logged to the consolecustomer: crowdAffects or could affect many people, though not necessarily a specific customer.customer: mulligan (g3)f: material designflutter/packages/flutter/material repository.f: scrollingViewports, list views, slivers, etc.frameworkflutter/packages/flutter repository. See also f: labels.waiting for PR to land (fixed)A fix is in flight
@megamattron

Description

@megamattron
megamattron
opened on Sep 1, 2017

Steps to Reproduce

I have a PageView that contains the top level widgets for my app, with switching between them controlled by a BottomNavBar. As per @Hixie's advice in the chat, I am adding AutomaticKeepAliveClientMixin to these top level widgets so the PageView won't recycle them and will preserve state. After I added this to the main widget that contains a network loaded ListView, on occasion when switching back to this ListView from another tab I get this failed assertion in the framework.

Logs

══╡ EXCEPTION CAUGHT BY WIDGETS LIBRARY ╞═══════════════════════════════════════════════════════════
The following assertion was thrown building NotificationListener<KeepAliveNotification>:
'package:flutter/src/rendering/object.dart': Failed assertion: line 3031 pos 14:
'_debugUltimatePreviousSiblingOf(after, equals: _firstChild)': 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
When the exception was thrown, this was the stack:
#2      RenderSliver&ContainerRenderObjectMixin._insertIntoChildList (package:flutter/src/rendering/object.dart:3031:14)
#3      RenderSliver&ContainerRenderObjectMixin.insert (package:flutter/src/rendering/object.dart:3065:5)
#4      RenderSliverMultiBoxAdaptor.insert (package:flutter/src/rendering/sliver_multi_box_adaptor.dart:193:17)
#5      SliverMultiBoxAdaptorElement.insertChildRenderObject (package:flutter/src/widgets/sliver.dart:840:18)
#6      RenderObjectElement.attachRenderObject (package:flutter/src/widgets/framework.dart:4380:35)
#7      RenderObjectElement.mount (package:flutter/src/widgets/framework.dart:4151:5)
#8      SingleChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:4515:16)
#9      Element.inflateWidget (package:flutter/src/widgets/framework.dart:2882:14)
#10     Element.updateChild (package:flutter/src/widgets/framework.dart:2685:12)
#11     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3546:16)
#12     Element.rebuild (package:flutter/src/widgets/framework.dart:3435:5)
#13     ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:3514:5)
#14     ComponentElement.mount (package:flutter/src/widgets/framework.dart:3509:5)
#15     Element.inflateWidget (package:flutter/src/widgets/framework.dart:2882:14)
#16     Element.updateChild (package:flutter/src/widgets/framework.dart:2685:12)
#17     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3546:16)
#18     Element.rebuild (package:flutter/src/widgets/framework.dart:3435:5)
#19     ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:3514:5)
#20     ComponentElement.mount (package:flutter/src/widgets/framework.dart:3509:5)
#21     ParentDataElement.mount (package:flutter/src/widgets/framework.dart:3827:16)
#22     Element.inflateWidget (package:flutter/src/widgets/framework.dart:2882:14)
#23     Element.updateChild (package:flutter/src/widgets/framework.dart:2685:12)
#24     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3546:16)
#25     Element.rebuild (package:flutter/src/widgets/framework.dart:3435:5)
#26     ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:3514:5)
#27     StatefulElement._firstBuild (package:flutter/src/widgets/framework.dart:3652:22)
#28     ComponentElement.mount (package:flutter/src/widgets/framework.dart:3509:5)
#29     Element.inflateWidget (package:flutter/src/widgets/framework.dart:2882:14)
#30     Element.updateChild (package:flutter/src/widgets/framework.dart:2685:12)
#31     SliverMultiBoxAdaptorElement.performRebuild (package:flutter/src/widgets/sliver.dart:696:34)
#32     SliverMultiBoxAdaptorElement.update (package:flutter/src/widgets/sliver.dart:665:7)
#33     Element.updateChild (package:flutter/src/widgets/framework.dart:2674:15)
#34     RenderObjectElement.updateChildren (package:flutter/src/widgets/framework.dart:4250:32)
#35     MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:4631:17)
#36     _ViewportElement.update (package:flutter/src/widgets/viewport.dart:150:17)
#37     Element.updateChild (package:flutter/src/widgets/framework.dart:2674:15)
#38     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3546:16)
#39     Element.rebuild (package:flutter/src/widgets/framework.dart:3435:5)
#40     ProxyElement.update (package:flutter/src/widgets/framework.dart:3781:5)
#41     Element.updateChild (package:flutter/src/widgets/framework.dart:2674:15)
#42     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:4523:14)
#43     Element.updateChild (package:flutter/src/widgets/framework.dart:2674:15)
#44     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:4523:14)
#45     Element.updateChild (package:flutter/src/widgets/framework.dart:2674:15)
#46     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:4523:14)
#47     Element.updateChild (package:flutter/src/widgets/framework.dart:2674:15)
#48     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3546:16)
#49     Element.rebuild (package:flutter/src/widgets/framework.dart:3435:5)
#50     StatefulElement.update (package:flutter/src/widgets/framework.dart:3671:5)
#51     Element.updateChild (package:flutter/src/widgets/framework.dart:2674:15)
#52     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3546:16)
#53     Element.rebuild (package:flutter/src/widgets/framework.dart:3435:5)
#54     StatefulElement.update (package:flutter/src/widgets/framework.dart:3671:5)
#55     Element.updateChild (package:flutter/src/widgets/framework.dart:2674:15)
#56     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3546:16)
#57     Element.rebuild (package:flutter/src/widgets/framework.dart:3435:5)
#58     StatelessElement.update (package:flutter/src/widgets/framework.dart:3596:5)
#59     Element.updateChild (package:flutter/src/widgets/framework.dart:2674:15)
#60     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3546:16)
#61     Element.rebuild (package:flutter/src/widgets/framework.dart:3435:5)
#62     StatefulElement.update (package:flutter/src/widgets/framework.dart:3671:5)
#63     Element.updateChild (package:flutter/src/widgets/framework.dart:2674:15)
#64     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3546:16)
#65     Element.rebuild (package:flutter/src/widgets/framework.dart:3435:5)
#66     ProxyElement.update (package:flutter/src/widgets/framework.dart:3781:5)
#67     Element.updateChild (package:flutter/src/widgets/framework.dart:2674:15)
#68     RenderObjectElement.updateChildren (package:flutter/src/widgets/framework.dart:4250:32)
#69     MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:4631:17)
#70     Element.updateChild (package:flutter/src/widgets/framework.dart:2674:15)
#71     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3546:16)
#72     Element.rebuild (package:flutter/src/widgets/framework.dart:3435:5)
#73     ProxyElement.update (package:flutter/src/widgets/framework.dart:3781:5)
#74     Element.updateChild (package:flutter/src/widgets/framework.dart:2674:15)
#75     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3546:16)
#76     Element.rebuild (package:flutter/src/widgets/framework.dart:3435:5)
#77     StatefulElement.update (package:flutter/src/widgets/framework.dart:3671:5)
#78     Element.updateChild (package:flutter/src/widgets/framework.dart:2674:15)
#79     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:4523:14)
#80     Element.updateChild (package:flutter/src/widgets/framework.dart:2674:15)
#81     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3546:16)
#82     Element.rebuild (package:flutter/src/widgets/framework.dart:3435:5)
#83     StatelessElement.update (package:flutter/src/widgets/framework.dart:3596:5)
#84     Element.updateChild (package:flutter/src/widgets/framework.dart:2674:15)
#85     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:4523:14)
#86     Element.updateChild (package:flutter/src/widgets/framework.dart:2674:15)
#87     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3546:16)
#88     Element.rebuild (package:flutter/src/widgets/framework.dart:3435:5)
#89     StatefulElement.update (package:flutter/src/widgets/framework.dart:3671:5)
#90     Element.updateChild (package:flutter/src/widgets/framework.dart:2674:15)
#91     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3546:16)
#92     Element.rebuild (package:flutter/src/widgets/framework.dart:3435:5)
#93     StatefulElement.update (package:flutter/src/widgets/framework.dart:3671:5)
#94     Element.updateChild (package:flutter/src/widgets/framework.dart:2674:15)
#95     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3546:16)
#96     Element.rebuild (package:flutter/src/widgets/framework.dart:3435:5)
#97     ProxyElement.update (package:flutter/src/widgets/framework.dart:3781:5)
#98     Element.updateChild (package:flutter/src/widgets/framework.dart:2674:15)
#99     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3546:16)
#100    Element.rebuild (package:flutter/src/widgets/framework.dart:3435:5)
#101    ProxyElement.update (package:flutter/src/widgets/framework.dart:3781:5)
#102    Element.updateChild (package:flutter/src/widgets/framework.dart:2674:15)
#103    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3546:16)
#104    Element.rebuild (package:flutter/src/widgets/framework.dart:3435:5)
#105    StatefulElement.update (package:flutter/src/widgets/framework.dart:3671:5)
#106    Element.updateChild (package:flutter/src/widgets/framework.dart:2674:15)
#107    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3546:16)
#108    Element.rebuild (package:flutter/src/widgets/framework.dart:3435:5)
#109    BuildOwner.buildScope (package:flutter/src/widgets/framework.dart:2260:33)
#110    BindingBase&SchedulerBinding&GestureBinding&ServicesBinding&RendererBinding&WidgetsBinding.drawFrame (package:flutter/src/widgets/binding.dart:503:20)
#111    BindingBase&SchedulerBinding&GestureBinding&ServicesBinding&RendererBinding._handlePersistentFrameCallback (package:flutter/src/rendering/binding.dart:189:5)
#112    BindingBase&SchedulerBinding._invokeFrameCallback (package:flutter/src/scheduler/binding.dart:695:15)
#113    BindingBase&SchedulerBinding.handleDrawFrame (package:flutter/src/scheduler/binding.dart:643:9)
#114    _invoke (file:///b/build/slave/Mac_Engine/build/src/flutter/lib/ui/hooks.dart:86)
#115    _drawFrame (file:///b/build/slave/Mac_Engine/build/src/flutter/lib/ui/hooks.dart:75)
(elided 2 frames from class _AssertionError)
════════════════════════════════════════════════════════════════════════════════════════════════════
Another exception was thrown: 'package:flutter/src/rendering/object.dart': Failed assertion: line 3031 pos 14: '_debugUltimatePreviousSiblingOf(after, equals: _firstChild)': is not true.
Another exception was thrown: 'package:flutter/src/rendering/object.dart': Failed assertion: line 3031 pos 14: '_debugUltimatePreviousSiblingOf(after, equals: _firstChild)': is not true.
Another exception was thrown: 'package:flutter/src/widgets/framework.dart': Failed assertion: line 3437 pos 14: 'owner._debugCurrentBuildTarget == this': is not true.
Another exception was thrown: 'package:flutter/src/widgets/framework.dart': Failed assertion: line 3437 pos 14: 'owner._debugCurrentBuildTarget == this': is not true.
Another exception was thrown: 'package:flutter/src/widgets/framework.dart': Failed assertion: line 3437 pos 14: 'owner._debugCurrentBuildTarget == this': is not true.
Another exception was thrown: 'package:flutter/src/widgets/framework.dart': Failed assertion: line 3437 pos 14: 'owner._debugCurrentBuildTarget == this': is not true.
Another exception was thrown: 'package:flutter/src/widgets/framework.dart': Failed assertion: line 3437 pos 14: 'owner._debugCurrentBuildTarget == this': is not true.
Another exception was thrown: 'package:flutter/src/widgets/framework.dart': Failed assertion: line 3437 pos 14: 'owner._debugCurrentBuildTarget == this': is not true.
Another exception was thrown: 'package:flutter/src/widgets/framework.dart': Failed assertion: line 3437 pos 14: 'owner._debugCurrentBuildTarget == this': is not true.
Another exception was thrown: 'package:flutter/src/widgets/framework.dart': Failed assertion: line 3437 pos 14: 'owner._debugCurrentBuildTarget == this': is not true.
Another exception was thrown: 'package:flutter/src/widgets/framework.dart': Failed assertion: line 3437 pos 14: 'owner._debugCurrentBuildTarget == this': is not true.
Another exception was thrown: 'package:flutter/src/widgets/framework.dart': Failed assertion: line 3437 pos 14: 'owner._debugCurrentBuildTarget == this': is not true.
Another exception was thrown: 'package:flutter/src/widgets/framework.dart': Failed assertion: line 3437 pos 14: 'owner._debugCurrentBuildTarget == this': is not true.
Another exception was thrown: 'package:flutter/src/widgets/framework.dart': Failed assertion: line 3437 pos 14: 'owner._debugCurrentBuildTarget == this': is not true.
Another exception was thrown: 'package:flutter/src/widgets/framework.dart': Failed assertion: line 3437 pos 14: 'owner._debugCurrentBuildTarget == this': is not true.
Another exception was thrown: 'package:flutter/src/widgets/framework.dart': Failed assertion: line 3437 pos 14: 'owner._debugCurrentBuildTarget == this': is not true.

Analyzing /Users/matt/code/flutter/kudos...
  lint • Don't import implementation files from another package at lib/feed.dart:5:8 • implementation_imports
  lint • Close instances of `dart.core.Sink` at lib/feed.dart:26:26 • close_sinks
  lint • Don't explicitly initialize variables to null at lib/loading_list_view.dart:23:5 • avoid_init_to_null
  lint • Don't import implementation files from another package at lib/post.dart:3:8 • implementation_imports
  hint • Unused import at lib/application.dart:4:8 • unused_import
  hint • Unused import at lib/feed.dart:2:8 • unused_import
  hint • Unused import at lib/feed.dart:5:8 • unused_import
  hint • Unused import at lib/feed.dart:7:8 • unused_import
  hint • Unused import at lib/feed.dart:12:8 • unused_import
  hint • Unused import at lib/feed.dart:13:8 • unused_import
  hint • This method overrides a method annotated as @mustCallSuper in 'State', but does not invoke the overridden method at lib/feed.dart:29:8 • must_call_super
  hint • This method overrides a method annotated as @mustCallSuper in 'State', but does not invoke the overridden method at lib/feed.dart:40:8 • must_call_super
  hint • The type parameter 'widgetAdapter' is annotated with @required but only named parameters without default value can be annotated with it at lib/loading_list_view.dart:23:5 • invalid_required_param
  hint • Unused import at lib/main.dart:6:8 • unused_import
  hint • The value of the field '_counter' isn't used at lib/main.dart:56:7 • unused_field
  hint • This method overrides a method annotated as @mustCallSuper in 'State', but does not invoke the overridden method at lib/main.dart:63:8 • must_call_super
  hint • This method overrides a method annotated as @mustCallSuper in 'State', but does not invoke the overridden method at lib/main.dart:71:8 • must_call_super
  hint • The method '_incrementCounter' isn't used at lib/main.dart:76:8 • unused_element
  hint • Unused import at lib/post.dart:7:8 • unused_import
  hint • This class inherits from a class marked as @immutable, and therefore should be immutable (all instance fields must be final) at lib/post.dart:10:7 • must_be_immutable
  hint • This class inherits from a class marked as @immutable, and therefore should be immutable (all instance fields must be final) at lib/post.dart:34:7 • must_be_immutable
  hint • The value of the local variable 'plainText' isn't used at lib/post.dart:71:10 • unused_local_variable
  hint • This class inherits from a class marked as @immutable, and therefore should be immutable (all instance fields must be final) at lib/post.dart:112:7 • must_be_immutable
  hint • This class inherits from a class marked as @immutable, and therefore should be immutable (all instance fields must be final) at lib/post.dart:160:7 • must_be_immutable
  hint • This class inherits from a class marked as @immutable, and therefore should be immutable (all instance fields must be final) at lib/profile.dart:10:7 • must_be_immutable
  hint • This method overrides a method annotated as @mustCallSuper in 'State', but does not invoke the overridden method at lib/profile.dart:27:10 • must_call_super
  hint • This class inherits from a class marked as @immutable, and therefore should be immutable (all instance fields must be final) at lib/profile.dart:145:7 • must_be_immutable
  hint • The class '_KudosEarned' isn't used at lib/profile.dart:218:7 • unused_element
  hint • Unused import at lib/send_photo.dart:5:8 • unused_import
  hint • Unused import at lib/usersearch.dart:6:8 • unused_import
  hint • Unused import at lib/usersearch.dart:7:8 • unused_import
  hint • This method overrides a method annotated as @mustCallSuper in 'State', but does not invoke the overridden method at lib/usersearch.dart:25:10 • must_call_super
32 issues found.

Flutter Doctor

[✓] Flutter (on Mac OS X 10.12.6 16G29, locale en-US, channel alpha)
    • Flutter at /Users/matt/code/flutter/flutter
    • Framework revision b156a0f054 (3 weeks ago), 2017-08-11 22:01:40 -0700
    • Engine revision fef7d827d6
    • Tools Dart version 1.25.0-dev.9.0

[✓] Android toolchain - develop for Android devices (Android SDK 25.0.3)
    • Android SDK at /Users/matt/code/android/android
    • Platform android-25, build-tools 25.0.3
    • Java binary at: /Applications/Android Studio.app/Contents/jre/jdk/Contents/Home/bin/java
    • Java version OpenJDK Runtime Environment (build 1.8.0_112-release-b06)

[✓] iOS toolchain - develop for iOS devices (Xcode 8.3.3)
    • Xcode at /Applications/Xcode.app/Contents/Developer
    • Xcode 8.3.3, Build version 8E3004b
    • ios-deploy 1.9.1
    • CocoaPods version 1.3.1

[✓] Android Studio (version 2.3)
    • Android Studio at /Applications/Android Studio.app/Contents
    • Java version OpenJDK Runtime Environment (build 1.8.0_112-release-b06)

[✓] IntelliJ IDEA Ultimate Edition (version 2017.2.2)
    • Flutter plugin version 16.0
    • Dart plugin version 172.3757.55

[✓] Connected devices
    • iPhone 6s • 3DF999CB-1CD6-4649-8187-DDEFBDB14DFA • ios • iOS 10.3 (simulator)

For more information about diagnosing and reporting Flutter bugs, please see https://flutter.io/bug-reports/.

Activity

Hixie
added this to the 4: Next milestone milestone on Sep 1, 2017
Hixie
added
f: scrollingViewports, list views, slivers, etc.
frameworkflutter/packages/flutter repository. See also f: labels.
on Sep 1, 2017
Hixie

Hixie commented on Sep 1, 2017

@Hixie
Hixie
on Sep 1, 2017
Contributor

Yikes, that's not a good sign.

TonyDowney

TonyDowney commented on Sep 15, 2017

@TonyDowney
TonyDowney
on Sep 15, 2017 · edited by goderbauer

Also encountered this today. Seemed to be linked to putting focus on a node that was currently offscreen. This main.dart file should reproduce it:

import 'package:flutter/material.dart';

void main() {
  runApp(new Test11895Body());
}

class Test11895Body extends StatefulWidget{
  Test11895BodyState createState() => new Test11895BodyState();
}

class Test11895BodyState extends State<Test11895Body>{
  List<String> model = ['Focus on this textfield', 'Keep focused on the first textfield', 'Scroll down and continue adding more cards with the button below'];

  @override
  Widget build(BuildContext context) {
    return new MaterialApp(
      home: new Scaffold(
        appBar: new AppBar(
          title: new Text('Bug #11895'),
        ),
        body: new ListView(
          primary:true,
          children: buildNoteCards(),
        ),
      ),
    );
  }

  List<Widget> buildNoteCards(){
    List<Widget> notes = new List<Widget>();
    for (int i = 0; i < model.length; i++){
      notes.add(new Card(
        child: new Container(
          constraints: new BoxConstraints(minHeight: 150.0),
          child: new TextField(
            controller: new TextEditingController(text: model[i]),
            maxLines: 5,
          ),
        ),
      )
      );
    }

    notes.add(
      new GestureDetector(
        onTap: _generateNewNote,
        child: new Container(
          child: new Card(
            child: new Icon(Icons.note_add, size:30.0),
          ),
        ),
      ),
    );
    return notes;
  }

  void _generateNewNote(){
    setState((){
      model.add('Keep going... note # ${model.length + 1}');
    });
  }

}
Hixie
added
c: crashStack traces logged to the console
on Oct 3, 2017
Hixie
changed the title [-]Failed assertion: line 3031 pos 14 in object.dart[/-] [+]_debugUltimatePreviousSiblingOf(after, equals: _firstChild) is not true.[/+] on Jun 12, 2018
Hixie
mentioned this in 6 issues on Jun 12, 2018
Hixie

Hixie commented on Jun 12, 2018

@Hixie
Hixie
on Jun 12, 2018
Contributor

See also https://gist.github.com/rmarau/baa31a9c4032de388a2b7777c8bae27e for another repro.

Hixie
added
severe: customer critical
on Jun 12, 2018

89 remaining items

dnfield
closed this as completedin #21350on Sep 11, 2018
zoechi
mentioned this in 3 issues on Sep 13, 2018
zoechi
mentioned this on Oct 1, 2018
7IXKTUIV1

7IXKTUIV1 commented on Oct 4, 2018

@7IXKTUIV1
7IXKTUIV1
on Oct 4, 2018 · edited by zoechi

I'm running 0.8.2 and I'm facing the same error:

  @override
  Widget build(BuildContext context) {
    return new Scaffold(
          body: new GridView.count(
            primary: false,
            padding: const EdgeInsets.all(5.0),
            crossAxisSpacing: 1.0,
            childAspectRatio: 1.0,
            crossAxisCount: 3,
            mainAxisSpacing: 8.0,
            children: <Widget>[
               Expanded(
                child: Image.network("https://www.google.com/images/branding/googlelogo/2x/googlelogo_color_272x92dp.png", fit:BoxFit.cover),
              ),
              Image.network("https://www.google.com/images/branding/googlelogo/2x/googlelogo_color_272x92dp.png"),
              const Text('Google'),
            ],
          ),
      floatingActionButton: new FloatingActionButton(
        onPressed: _incrementCounter,
        tooltip: 'Search',
        child: new Icon(Icons.search),
        backgroundColor: PrimaryColor2,
        foregroundColor: Color(0xFFFFFFFF),
      ),
    );
  }
zoechi

zoechi commented on Oct 4, 2018

@zoechi
zoechi
on Oct 4, 2018
Contributor

@super94i I'd suggest to create a new issue with a properly filled issue template and a minimal but runnable reproduction.

Eder87rh

Eder87rh commented on Oct 4, 2018

@Eder87rh
Eder87rh
on Oct 4, 2018 · edited by zoechi

Sorry guys, the problem was still there. But I think I've finally found a solution. This bug is triggered when we click on the save button and the keyboard is still in screen. My workaround is hide the keyboard before to call _submitForm method like this:

Widget _buildSubmitButton() {
    return ScopedModelDescendant<MainModel>(
      builder: (BuildContext context, Widget child, MainModel model) {
        return model.isLoading
            ? Center(child: CircularProgressIndicator())
            : RaisedButton(
                child: Text('Save'),
                textColor: Colors.white,
                onPressed: () async {
                  SystemChannels.textInput.invokeMethod('TextInput.hide');
                  await Future.delayed(const Duration(milliseconds: 100)); 
 
                  _submitForm(model.addProduct, model.updateProduct,
                      model.selectProduct, model.selectedProductIndex);
                },
              );
      },
    );
  }
dnfield

dnfield commented on Oct 4, 2018

@dnfield
dnfield
on Oct 4, 2018
Contributor

@Eder87rh this definitely seems like a different issue - can you open a separate issue (feel free to tag me in it) with a minimal reproduction?

dnfield

dnfield commented on Oct 4, 2018

@dnfield
dnfield
on Oct 4, 2018
Contributor

@super94i yours also seems different, but again please feel free to open a separate issue and tag me in it if you like.

mohamedHassanKa

mohamedHassanKa commented on Nov 9, 2018

@mohamedHassanKa
mohamedHassanKa
on Nov 9, 2018

I had the same error and its from the keyboard if you hide they keyboard before submitting the form .it will work . but i want to know is there any solution to go over this probleme

dnfield

dnfield commented on Nov 9, 2018

@dnfield
dnfield
on Nov 9, 2018
Contributor

@mohamedHassanKa please open a new issue with a sample and instructions to reproduce your issue.

davidlahuta

davidlahuta commented on Oct 15, 2020

@davidlahuta
davidlahuta
on Oct 15, 2020 · edited by davidlahuta

I encountered this issue in current beta.

✓] Flutter (Channel beta, 1.22.1, on Mac OS X 10.15.7 19H2, locale en-CZ)
 
[✓] Android toolchain - develop for Android devices (Android SDK version 29.0.2)
[✓] Xcode - develop for iOS and macOS (Xcode 12.0.1)
[✓] Chrome - develop for the web
[!] Android Studio (version 4.1)
    ✗ Flutter plugin not installed; this adds Flutter specific functionality.
    ✗ Dart plugin not installed; this adds Dart specific functionality.
[✓] VS Code (version 1.50.1)
[✓] Connected device (3 available)

Here is my workaround code.

When tabs are changing, it will unfocus any active widget.

final controller = TabController(length: 3, vsync: this, initialIndex: 1);
controller.addListener(() {
  FocusScopeNode currentFocus = FocusScope.of(context);

  if (currentFocus.hasFocus) {
    currentFocus.unfocus();
  }
);
github-actions

github-actions commented on Aug 11, 2021

@github-actions
github-actionsbot
on Aug 11, 2021

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.

github-actions
locked as resolved and limited conversation to collaborators on Aug 11, 2021
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c: crashStack traces logged to the consolecustomer: crowdAffects or could affect many people, though not necessarily a specific customer.customer: mulligan (g3)f: material designflutter/packages/flutter/material repository.f: scrollingViewports, list views, slivers, etc.frameworkflutter/packages/flutter repository. See also f: labels.waiting for PR to land (fixed)A fix is in flight

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      _debugUltimatePreviousSiblingOf(after, equals: _firstChild) is not true. · Issue #11895 · flutter/flutter