Exception while scrolling through TabBar navigation #18756

Activity

1. escamoteur commented on Jun 24, 2018

   

   escamoteur

   on Jun 24, 2018

   Contributor

   More actions

   Please add your flutter doctor -v output

   seems to be the same as #18763
2. ajinasokan commented on Jun 25, 2018

   

   ajinasokan

   on Jun 25, 2018

   More actions

   I have the same issue. Heres my flutter doctor output:

   [✓] Flutter (Channel beta, v0.5.1, on Mac OS X 10.13.3 17D102, locale en-IN)
       • Flutter version 0.5.1 at /Users/ajinasokan/flutter
       • Framework revision c7ea3ca377 (4 weeks ago), 2018-05-29 21:07:33 +0200
       • Engine revision 1ed25ca7b7
       • Dart version 2.0.0-dev.58.0.flutter-f981f09760
   
   [✓] Android toolchain - develop for Android devices (Android SDK 27.0.3)
       • Android SDK at /Users/ajinasokan/Library/Android/sdk
       • Android NDK at /Users/ajinasokan/Library/Android/sdk/ndk-bundle
       • Platform android-27, build-tools 27.0.3
       • ANDROID_HOME = /Users/ajinasokan/Library/Android/sdk
       • Java binary at: /Applications/Android Studio.app/Contents/jre/jdk/Contents/Home/bin/java
       • Java version OpenJDK Runtime Environment (build 1.8.0_152-release-1024-b01)
       • All Android licenses accepted.
   
   [✓] iOS toolchain - develop for iOS devices (Xcode 9.2)
       • Xcode at /Applications/Xcode.app/Contents/Developer
       • Xcode 9.2, Build version 9C40b
       • ios-deploy 1.9.2
       • CocoaPods version 1.5.2
   
   [✓] Android Studio (version 3.1)
       • Android Studio at /Applications/Android Studio.app/Contents
       • Flutter plugin version 25.0.1
       • Dart plugin version 173.4700
       • Java version OpenJDK Runtime Environment (build 1.8.0_152-release-1024-b01)
   
   [✓] VS Code (version 1.24.1)
       • VS Code at /Applications/Visual Studio Code.app/Contents
       • Flutter extension version 2.12.2
   
   [✓] Connected devices (1 available)
       • iPhone 6 • 25B46C9F-DB64-460B-9108-F85437197F3D • ios • iOS 11.2 (simulator)
   
   • No issues found!
   
3. zoechi

   added

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

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

   p: material_uimaterial_ui package in flutter/packagesmaterial_ui package in flutter/packages

   on Jun 25, 2018
4. sahil311289 commented on Jun 26, 2018

   

   sahil311289

   on Jun 26, 2018

   Author

   More actions

   

   Issue appears when I click on a TabBar (bottomNavigationBar with a child as TabBar in this case) in a random sequence. Sequentially clicking has no issues. But if I click 3rd tab after clicking 6th, it gives an exception. I hope the screenshot's message is helpful.
5. escamoteur commented on Jun 27, 2018

   

   escamoteur

   on Jun 27, 2018

   Contributor

   More actions

   Please add your flutter doctor -v output, the code of this page fenced in ```Dart above and ``` below the code and the output of the debug view when this exception occurs, Thanks

   👍React with 👍1Reacted by Günter Zöchbauer
6. sahil311289 commented on Jun 27, 2018

   

   sahil311289

   on Jun 27, 2018

   Last edited by zoechi

   Author

   More actions

   Launching lib/main.dart on LG D802 in debug mode...
   Initializing gradle...
   Resolving dependencies...
   Running 'gradlew assembleDebug'...
   registerResGeneratingTask is deprecated, use registerGeneratedFolders(FileCollection)
   registerResGeneratingTask is deprecated, use registerGeneratedFolders(FileCollection)
   registerResGeneratingTask is deprecated, use registerGeneratedFolders(FileCollection)
   Warning: Missing asset in fonts for BadScript
   Warning: Missing asset in fonts for Roboto
   Warning: Missing asset in fonts for Roboto
   Built build/app/outputs/apk/debug/app-debug.apk.
   Installing build/app/outputs/apk/app.apk...
   I/FlutterActivityDelegate( 5478): onResume setting current activity to this
   Warning: Missing asset in fonts for BadScript
   Warning: Missing asset in fonts for Roboto
   Warning: Missing asset in fonts for Roboto
   Syncing files to device LG D802...
   W/ResourcesManager( 5478): Asset path '/system/framework/com.android.media.remotedisplay.jar' does not exist or contains no resources.
   W/ResourcesManager( 5478): Asset path '/system/framework/com.android.location.provider.jar' does not exist or contains no resources.
   V/NativeCrypto( 5478): Registering com/google/android/gms/org/conscrypt/NativeCrypto's 280 native methods...
   I/art     ( 5478): Rejecting re-init on previously-failed class java.lang.Class<com.google.android.gms.org.conscrypt.Java7ExtendedSSLSession>
   I/art     ( 5478): Rejecting re-init on previously-failed class java.lang.Class<com.google.android.gms.org.conscrypt.Java7ExtendedSSLSession>
   I/art     ( 5478): Rejecting re-init on previously-failed class java.lang.Class<com.google.android.gms.org.conscrypt.Java8ExtendedSSLSession>
   I/art     ( 5478): Rejecting re-init on previously-failed class java.lang.Class<com.google.android.gms.org.conscrypt.Java8ExtendedSSLSession>
   W/System  ( 5478): Could not create com.google.android.gms.org.conscrypt.OpenSSLSocketFactoryImpl with ClassLoader dalvik.system.PathClassLoader[DexPathList[[zip file "/data/app/chat.gabhub.GabHub-2/base.apk"],nativeLibraryDirectories=[/data/app/chat.gabhub.GabHub-2/lib/arm, /vendor/lib, /system/lib]]]: com.google.android.gms.org.conscrypt.OpenSSLSocketFactoryImpl
   I/ProviderInstaller( 5478): Installed default security provider GmsCore_OpenSSL
   D/libc-netbsd( 5478): [getaddrinfo]: hostname=xxxxx; servname=(null); cache_mode=(null), netid=0; mark=0
   D/libc-netbsd( 5478): [getaddrinfo]: ai_addrlen=0; ai_canonname=xxxxx; ai_flags=4; ai_family=0
   D/libc-netbsd( 5478): [getaddrinfo]: hostname=xxxxx; servname=(null); cache_mode=(null), netid=0; mark=0
   D/libc-netbsd( 5478): [getaddrinfo]: ai_addrlen=0; ai_canonname=xxxxx; ai_flags=1024; ai_family=0
   I/System.out( 5478): propertyValue:false
   D/libc-netbsd( 5478): [getaddrinfo]: hostname=xxxxx; servname=(null); cache_mode=(null), netid=0; mark=0
   D/libc-netbsd( 5478): [getaddrinfo]: ai_addrlen=0; ai_canonname=xxxxx; ai_flags=4; ai_family=0
   I/ViewRootImpl( 5478): ViewRoot's Touch Event : ACTION_DOWN
   I/ViewRootImpl( 5478): ViewRoot's Touch Event : ACTION_UP
   I/ViewRootImpl( 5478): ViewRoot's Touch Event : ACTION_DOWN
   I/ViewRootImpl( 5478): ViewRoot's Touch Event : ACTION_UP
   I/ViewRootImpl( 5478): ViewRoot's Touch Event : ACTION_DOWN
   I/ViewRootImpl( 5478): ViewRoot's Touch Event : ACTION_UP
   I/flutter ( 5478): ══╡ EXCEPTION CAUGHT BY WIDGETS LIBRARY ╞═══════════════════════════════════════════════════════════
   I/flutter ( 5478): The following assertion was thrown while finalizing the widget tree:
   I/flutter ( 5478): 'package:flutter/src/widgets/scroll_position.dart': Failed assertion: line 657 pos 12: 'pixels !=
   I/flutter ( 5478): null': is not true.
   I/flutter ( 5478): Either the assertion indicates an error in the framework itself, or we should provide substantially
   I/flutter ( 5478): more information in this error message to help you determine and fix the underlying cause.
   I/flutter ( 5478): In either case, please report this assertion by filing a bug on GitHub:
   I/flutter ( 5478):   https://github.com/flutter/flutter/issues/new
   I/flutter ( 5478): When the exception was thrown, this was the stack:
   I/flutter ( 5478): #2      ScrollPosition.dispose (package:flutter/src/widgets/scroll_position.dart)
   I/flutter ( 5478): #3      ScrollPositionWithSingleContext.dispose (package:flutter/src/widgets/scroll_position_with_single_context.dart:255:11)
   I/flutter ( 5478): #4      ScrollableState.dispose (package:flutter/src/widgets/scrollable.dart:324:14)
   I/flutter ( 5478): #5      StatefulElement.unmount (package:flutter/src/widgets/framework.dart:3821:12)
   I/flutter ( 5478): #6      _InactiveElements._unmount (package:flutter/src/widgets/framework.dart:1697:13)
   I/flutter ( 5478): #7      _InactiveElements._unmount.<anonymous closure> (package:flutter/src/widgets/framework.dart:1695:7)
   I/flutter ( 5478): #8      ComponentElement.visitChildren (package:flutter/src/widgets/framework.dart:3676:14)
   I/flutter ( 5478): #9      _InactiveElements._unmount (package:flutter/src/widgets/framework.dart:1693:13)
   I/flutter ( 5478): #10     _InactiveElements._unmount.<anonymous closure> (package:flutter/src/widgets/framework.dart:1695:7)
   I/flutter ( 5478): #11     ComponentElement.visitChildren (package:flutter/src/widgets/framework.dart:3676:14)
   I/flutter ( 5478): #12     _InactiveElements._unmount (package:flutter/src/widgets/framework.dart:1693:13)
   I/flutter ( 5478): #13     _InactiveElements._unmount.<anonymous closure> (package:flutter/src/widgets/framework.dart:1695:7)
   I/flutter ( 5478): #14     ComponentElement.visitChildren (package:flutter/src/widgets/framework.dart:3676:14)
   I/flutter ( 5478): #15     _InactiveElements._unmount (package:flutter/src/widgets/framework.dart:1693:13)
   I/flutter ( 5478): #16     _InactiveElements._unmount.<anonymous closure> (package:flutter/src/widgets/framework.dart:1695:7)
   I/flutter ( 5478): #17     ComponentElement.visitChildren (package:flutter/src/widgets/framework.dart:3676:14)
   I/flutter ( 5478): #18     _InactiveElements._unmount (package:flutter/src/widgets/framework.dart:1693:13)
   I/flutter ( 5478): #19     _InactiveElements._unmount.<anonymous closure> (package:flutter/src/widgets/framework.dart:1695:7)
   I/flutter ( 5478): #20     ComponentElement.visitChildren (package:flutter/src/widgets/framework.dart:3676:14)
   I/flutter ( 5478): #21     _InactiveElements._unmount (package:flutter/src/widgets/framework.dart:1693:13)
   I/flutter ( 5478): #22     _InactiveElements._unmount.<anonymous closure> (package:flutter/src/widgets/framework.dart:1695:7)
   I/flutter ( 5478): #23     ComponentElement.visitChildren (package:flutter/src/widgets/framework.dart:3676:14)
   I/flutter ( 5478): #24     _InactiveElements._unmount (package:flutter/src/widgets/framework.dart:1693:13)
   I/flutter ( 5478): #25     _InactiveElements._unmount.<anonymous closure> (package:flutter/src/widgets/framework.dart:1695:7)
   I/flutter ( 5478): #26     MultiChildRenderObjectElement.visitChildren (package:flutter/src/widgets/framework.dart:4742:16)
   I/flutter ( 5478): #27     _InactiveElements._unmount (package:flutter/src/widgets/framework.dart:1693:13)
   I/flutter ( 5478): #28     _InactiveElements._unmount.<anonymous closure> (package:flutter/src/widgets/framework.dart:1695:7)
   I/flutter ( 5478): #29     ComponentElement.visitChildren (package:flutter/src/widgets/framework.dart:3676:14)
   I/flutter ( 5478): #30     _InactiveElements._unmount (package:flutter/src/widgets/framework.dart:1693:13)
   I/flutter ( 5478): #31     _InactiveElements._unmount.<anonymous closure> (package:flutter/src/widgets/framework.dart:1695:7)
   I/flutter ( 5478): #32     ComponentElement.visitChildren (package:flutter/src/widgets/framework.dart:3676:14)
   I/flutter ( 5478): #33     _InactiveElements._unmount (package:flutter/src/widgets/framework.dart:1693:13)
   I/flutter ( 5478): #34     _InactiveElements._unmount.<anonymous closure> (package:flutter/src/widgets/framework.dart:1695:7)
   I/flutter ( 5478): #35     ComponentElement.visitChildren (package:flutter/src/widgets/framework.dart:3676:14)
   I/flutter ( 5478): #36     _InactiveElements._unmount (package:flutter/src/widgets/framework.dart:1693:13)
   I/flutter ( 5478): #37     _InactiveElements._unmount.<anonymous closure> (package:flutter/src/widgets/framework.dart:1695:7)
   I/flutter ( 5478): #38     SingleChildRenderObjectElement.visitChildren (package:flutter/src/widgets/framework.dart:4642:14)
   I/flutter ( 5478): #39     _InactiveElements._unmount (package:flutter/src/widgets/framework.dart:1693:13)
   I/flutter ( 5478): #40     _InactiveElements._unmount.<anonymous closure> (package:flutter/src/widgets/framework.dart:1695:7)
   I/flutter ( 5478): #41     ComponentElement.visitChildren (package:flutter/src/widgets/framework.dart:3676:14)
   I/flutter ( 5478): #42     _InactiveElements._unmount (package:flutter/src/widgets/framework.dart:1693:13)
   I/flutter ( 5478): #43     _InactiveElements._unmount.<anonymous closure> (package:flutter/src/widgets/framework.dart:1695:7)
   I/flutter ( 5478): #44     SingleChildRenderObjectElement.visitChildren (package:flutter/src/widgets/framework.dart:4642:14)
   I/flutter ( 5478): #45     _InactiveElements._unmount (package:flutter/src/widgets/framework.dart:1693:13)
   I/flutter ( 5478): #46     _InactiveElements._unmount.<anonymous closure> (package:flutter/src/widgets/framework.dart:1695:7)
   I/flutter ( 5478): #47     ComponentElement.visitChildren (package:flutter/src/widgets/framework.dart:3676:14)
   I/flutter ( 5478): #48     _InactiveElements._unmount (package:flutter/src/widgets/framework.dart:1693:13)
   I/flutter ( 5478): #49     _InactiveElements._unmount.<anonymous closure> (package:flutter/src/widgets/framework.dart:1695:7)
   I/flutter ( 5478): #50     ComponentElement.visitChildren (package:flutter/src/widgets/framework.dart:3676:14)
   I/flutter ( 5478): #51     _InactiveElements._unmount (package:flutter/src/widgets/framework.dart:1693:13)
   I/flutter ( 5478): #52     _InactiveElements._unmount.<anonymous closure> (package:flutter/src/widgets/framework.dart:1695:7)
   I/flutter ( 5478): #53     ComponentElement.visitChildren (package:flutter/src/widgets/framework.dart:3676:14)
   I/flutter ( 5478): #54     _InactiveElements._unmount (package:flutter/src/widgets/framework.dart:1693:13)
   I/flutter ( 5478): #55     _InactiveElements._unmount.<anonymous closure> (package:flutter/src/widgets/framework.dart:1695:7)
   I/flutter ( 5478): #56     ComponentElement.visitChildren (package:flutter/src/widgets/framework.dart:3676:14)
   I/flutter ( 5478): #57     _InactiveElements._unmount (package:flutter/src/widgets/framework.dart:1693:13)
   I/flutter ( 5478): #58     _InactiveElements._unmount.<anonymous closure> (package:flutter/src/widgets/framework.dart:1695:7)
   I/flutter ( 5478): #59     ComponentElement.visitChildren (package:flutter/src/widgets/framework.dart:3676:14)
   I/flutter ( 5478): #60     _InactiveElements._unmount (package:flutter/src/widgets/framework.dart:1693:13)
   I/flutter ( 5478): #61     _InactiveElements._unmount.<anonymous closure> (package:flutter/src/widgets/framework.dart:1695:7)
   I/flutter ( 5478): #62     ComponentElement.visitChildren (package:flutter/src/widgets/framework.dart:3676:14)
   I/flutter ( 5478): #63     _InactiveElements._unmount (package:flutter/src/widgets/framework.dart:1693:13)
   I/flutter ( 5478): #64     _InactiveElements._unmount.<anonymous closure> (package:flutter/src/widgets/framework.dart:1695:7)
   I/flutter ( 5478): #65     ComponentElement.visitChildren (package:flutter/src/widgets/framework.dart:3676:14)
   I/flutter ( 5478): #66     _InactiveElements._unmount (package:flutter/src/widgets/framework.dart:1693:13)
   I/flutter ( 5478): #67     _InactiveElements._unmount.<anonymous closure> (package:flutter/src/widgets/framework.dart:1695:7)
   I/flutter ( 5478): #68     ComponentElement.visitChildren (package:flutter/src/widgets/framework.dart:3676:14)
   I/flutter ( 5478): #69     _InactiveElements._unmount (package:flutter/src/widgets/framework.dart:1693:13)
   I/flutter ( 5478): #70     _InactiveElements._unmount.<anonymous closure> (package:flutter/src/widgets/framework.dart:1695:7)
   I/flutter ( 5478): #71     MultiChildRenderObjectElement.visitChildren (package:flutter/src/widgets/framework.dart:4742:16)
   I/flutter ( 5478): #72     _InactiveElements._unmount (package:flutter/src/widgets/framework.dart:1693:13)
   I/flutter ( 5478): #73     _InactiveElements._unmount.<anonymous closure> (package:flutter/src/widgets/framework.dart:1695:7)
   I/flutter ( 5478): #74     ComponentElement.visitChildren (package:flutter/src/widgets/framework.dart:3676:14)
   I/flutter ( 5478): #75     _InactiveElements._unmount (package:flutter/src/widgets/framework.dart:1693:13)
   I/flutter ( 5478): #76     _InactiveElements._unmount.<anonymous closure> (package:flutter/src/widgets/framework.dart:1695:7)
   I/flutter ( 5478): #77     ComponentElement.visitChildren (package:flutter/src/widgets/framework.dart:3676:14)
   I/flutter ( 5478): #78     _InactiveElements._unmount (package:flutter/src/widgets/framework.dart:1693:13)
   I/flutter ( 5478): #79     _InactiveElements._unmount.<anonymous closure> (package:flutter/src/widgets/framework.dart:1695:7)
   I/flutter ( 5478): #80     ComponentElement.visitChildren (package:flutter/src/widgets/framework.dart:3676:14)
   I/flutter ( 5478): #81     _InactiveElements._unmount (package:flutter/src/widgets/framework.dart:1693:13)
   I/flutter ( 5478): #82     _InactiveElements._unmount.<anonymous closure> (package:flutter/src/widgets/framework.dart:1695:7)
   I/flutter ( 5478): #83     SingleChildRenderObjectElement.visitChildren (package:flutter/src/widgets/framework.dart:4642:14)
   I/flutter ( 5478): #84     _InactiveElements._unmount (package:flutter/src/widgets/framework.dart:1693:13)
   I/flutter ( 5478): #85     _InactiveElements._unmount.<anonymous closure> (package:flutter/src/widgets/framework.dart:1695:7)
   I/flutter ( 5478): #86     ComponentElement.visitChildren (package:flutter/src/widgets/framework.dart:3676:14)
   I/flutter ( 5478): #87     _InactiveElements._unmount (package:flutter/src/widgets/framework.dart:1693:13)
   I/flutter ( 5478): #88     _InactiveElements._unmount.<anonymous closure> (package:flutter/src/widgets/framework.dart:1695:7)
   I/flutter ( 5478): #89     SingleChildRenderObjectElement.visitChildren (package:flutter/src/widgets/framework.dart:4642:14)
   I/flutter ( 5478): #90     _InactiveElements._unmount (package:flutter/src/widgets/framework.dart:1693:13)
   I/flutter ( 5478): #91     _InactiveElements._unmount.<anonymous closure> (package:flutter/src/widgets/framework.dart:1695:7)
   I/flutter ( 5478): #92     ComponentElement.visitChildren (package:flutter/src/widgets/framework.dart:3676:14)
   I/flutter ( 5478): #93     _InactiveElements._unmount (package:flutter/src/widgets/framework.dart:1693:13)
   I/flutter ( 5478): #94     _InactiveElements._unmount.<anonymous closure> (package:flutter/src/widgets/framework.dart:1695:7)
   I/flutter ( 5478): #95     ComponentElement.visitChildren (package:flutter/src/widgets/framework.dart:3676:14)
   I/flutter ( 5478): #96     _InactiveElements._unmount (package:flutter/src/widgets/framework.dart:1693:13)
   I/flutter ( 5478): #97     _InactiveElements._unmount.<anonymous closure> (package:flutter/src/widgets/framework.dart:1695:7)
   I/flutter ( 5478): #98     ComponentElement.visitChildren (package:flutter/src/widgets/framework.dart:3676:14)
   I/flutter ( 5478): #99     _InactiveElements._unmount (package:flutter/src/widgets/framework.dart:1693:13)
   I/flutter ( 5478): #100    _InactiveElements._unmount.<anonymous closure> (package:flutter/src/widgets/framework.dart:1695:7)
   I/flutter ( 5478): #101    ComponentElement.visitChildren (package:flutter/src/widgets/framework.dart:3676:14)
   I/flutter ( 5478): #102    _InactiveElements._unmount (package:flutter/src/widgets/framework.dart:1693:13)
   I/flutter ( 5478): #103    _InactiveElements._unmount.<anonymous closure> (package:flutter/src/widgets/framework.dart:1695:7)
   I/flutter ( 5478): #104    ComponentElement.visitChildren (package:flutter/src/widgets/framework.dart:3676:14)
   I/flutter ( 5478): #105    _InactiveElements._unmount (package:flutter/src/widgets/framework.dart:1693:13)
   I/flutter ( 5478): #106    _InactiveElements._unmount.<anonymous closure> (package:flutter/src/widgets/framework.dart:1695:7)
   I/flutter ( 5478): #107    ComponentElement.visitChildren (package:flutter/src/widgets/framework.dart:3676:14)
   I/flutter ( 5478): #108    _InactiveElements._unmount (package:flutter/src/widgets/framework.dart:1693:13)
   I/flutter ( 5478): #109    _InactiveElements._unmount.<anonymous closure> (package:flutter/src/widgets/framework.dart:1695:7)
   I/flutter ( 5478): #110    SingleChildRenderObjectElement.visitChildren (package:flutter/src/widgets/framework.dart:4642:14)
   I/flutter ( 5478): #111    _InactiveElements._unmount (package:flutter/src/widgets/framework.dart:1693:13)
   I/flutter ( 5478): #112    _InactiveElements._unmount.<anonymous closure> (package:flutter/src/widgets/framework.dart:1695:7)
   I/flutter ( 5478): #113    ComponentElement.visitChildren (package:flutter/src/widgets/framework.dart:3676:14)
   I/flutter ( 5478): #114    _InactiveElements._unmount (package:flutter/src/widgets/framework.dart:1693:13)
   I/flutter ( 5478): #115    _InactiveElements._unmount.<anonymous closure> (package:flutter/src/widgets/framework.dart:1695:7)
   I/flutter ( 5478): #116    ComponentElement.visitChildren (package:flutter/src/widgets/framework.dart:3676:14)
   I/flutter ( 5478): #117    _InactiveElements._unmount (package:flutter/src/widgets/framework.dart:1693:13)
   I/flutter ( 5478): #118    _InactiveElements._unmount.<anonymous closure> (package:flutter/src/widgets/framework.dart:1695:7)
   I/flutter ( 5478): #119    ComponentElement.visitChildren (package:flutter/src/widgets/framework.dart:3676:14)
   I/flutter ( 5478): #120    _InactiveElements._unmount (package:flutter/src/widgets/framework.dart:1693:13)
   I/flutter ( 5478): #121    ListIterable.forEach (dart:_internal/iterable.dart:39:13)
   I/flutter ( 5478): #122    _InactiveElements._unmountAll (package:flutter/src/widgets/framework.dart:1706:25)
   I/flutter ( 5478): #123    BuildOwner.finalizeTree.<anonymous closure> (package:flutter/src/widgets/framework.dart:2328:27)
   I/flutter ( 5478): #124    BuildOwner.lockState (package:flutter/src/widgets/framework.dart:2160:15)
   I/ViewRootImpl( 5478): ViewRoot's Touch Event : ACTION_DOWN
   I/ViewRootImpl( 5478): ViewRoot's Touch Event : ACTION_UP
   I/flutter ( 5478): #125    BuildOwner.finalizeTree (package:flutter/src/widgets/framework.dart:2327:7)
   I/flutter ( 5478): #126    _WidgetsFlutterBinding&BindingBase&GestureBinding&ServicesBinding&SchedulerBinding&PaintingBinding&RendererBinding&WidgetsBinding.drawFrame (package:flutter/src/widgets/binding.dart:628:18)
   I/flutter ( 5478): #127    _WidgetsFlutterBinding&BindingBase&GestureBinding&ServicesBinding&SchedulerBinding&PaintingBinding&RendererBinding._handlePersistentFrameCallback (package:flutter/src/rendering/binding.dart:208:5)
   I/flutter ( 5478): #128    _WidgetsFlutterBinding&BindingBase&GestureBinding&ServicesBinding&SchedulerBinding._invokeFrameCallback (package:flutter/src/scheduler/binding.dart:990:15)
   I/flutter ( 5478): #129    _WidgetsFlutterBinding&BindingBase&GestureBinding&ServicesBinding&SchedulerBinding.handleDrawFrame (package:flutter/src/scheduler/binding.dart:930:9)
   I/flutter ( 5478): #130    _WidgetsFlutterBinding&BindingBase&GestureBinding&ServicesBinding&SchedulerBinding._handleDrawFrame (package:flutter/src/scheduler/binding.dart:842:5)
   I/flutter ( 5478): #131    _invoke (dart:ui/hooks.dart:120:13)
   I/flutter ( 5478): #132    _drawFrame (dart:ui/hooks.dart:109:3)
   I/flutter ( 5478): (elided 2 frames from class _AssertionError)
   I/flutter ( 5478): ════════════════════════════════════════════════════════════════════════════════════════════════════
   I/ViewRootImpl( 5478): ViewRoot's Touch Event : ACTION_DOWN
   I/ViewRootImpl( 5478): ViewRoot's Touch Event : ACTION_UP
   I/flutter ( 5478): Another exception was thrown: 'package:flutter/src/widgets/scroll_position.dart': Failed assertion: line 657 pos 12: 'pixels != null': is not true.
   I/ViewRootImpl( 5478): ViewRoot's Touch Event : ACTION_DOWN
   I/ViewRootImpl( 5478): ViewRoot's Touch Event : ACTION_UP
   I/ViewRootImpl( 5478): ViewRoot's Touch Event : ACTION_DOWN
   I/ViewRootImpl( 5478): ViewRoot's Touch Event : ACTION_UP
   I/ViewRootImpl( 5478): ViewRoot's Touch Event : ACTION_DOWN
   I/ViewRootImpl( 5478): ViewRoot's Touch Event : ACTION_UP
   I/flutter ( 5478): Another exception was thrown: 'package:flutter/src/widgets/scroll_position.dart': Failed assertion: line 657 pos 12: 'pixels != null': is not true.
   I/ViewRootImpl( 5478): ViewRoot's Touch Event : ACTION_DOWN
   I/ViewRootImpl( 5478): ViewRoot's Touch Event : ACTION_UP
   I/ViewRootImpl( 5478): ViewRoot's Touch Event : ACTION_DOWN
   I/ViewRootImpl( 5478): ViewRoot's Touch Event : ACTION_UP
   I/ViewRootImpl( 5478): ViewRoot's Touch Event : ACTION_DOWN
   I/ViewRootImpl( 5478): ViewRoot's Touch Event : ACTION_UP
   I/ViewRootImpl( 5478): ViewRoot's Touch Event : ACTION_DOWN
   I/ViewRootImpl( 5478): ViewRoot's Touch Event : ACTION_UP
   I/ViewRootImpl( 5478): ViewRoot's Touch Event : ACTION_DOWN
   I/ViewRootImpl( 5478): ViewRoot's Touch Event : ACTION_UP
   I/ViewRootImpl( 5478): ViewRoot's Touch Event : ACTION_DOWN
   I/ViewRootImpl( 5478): ViewRoot's Touch Event : ACTION_UP
   I/flutter ( 5478): Another exception was thrown: 'package:flutter/src/widgets/scroll_position.dart': Failed assertion: line 657 pos 12: 'pixels != null': is not true.
   I/ViewRootImpl( 5478): ViewRoot's Touch Event : ACTION_DOWN
   I/ViewRootImpl( 5478): ViewRoot's Touch Event : ACTION_UP
   I/ViewRootImpl( 5478): ViewRoot's Touch Event : ACTION_DOWN
   I/ViewRootImpl( 5478): ViewRoot's Touch Event : ACTION_UP
   I/ViewRootImpl( 5478): ViewRoot's Touch Event : ACTION_DOWN
   I/ViewRootImpl( 5478): ViewRoot's Touch Event : ACTION_UP
   I/ViewRootImpl( 5478): ViewRoot's KeyEvent { action=ACTION_DOWN, keyCode=KEYCODE_BACK, scanCode=0, metaState=0, flags=0x48, repeatCount=0, eventTime=250143550, downTime=250143550, deviceId=-1, source=0x101 } to com.android.internal.policy.impl.PhoneWindow$DecorView{25d05e4b V.E..... R.....I. 0,0-1080,1920}
   I/ViewRootImpl( 5478): ViewRoot's KeyEvent { action=ACTION_UP, keyCode=KEYCODE_BACK, scanCode=0, metaState=0, flags=0x48, repeatCount=0, eventTime=250143627, downTime=250143550, deviceId=-1, source=0x101 } to com.android.internal.policy.impl.PhoneWindow$DecorView{25d05e4b V.E..... R.....I. 0,0-1080,1920}
   I/ViewRootImpl( 5478): ViewRoot's Touch Event : ACTION_DOWN
   I/ViewRootImpl( 5478): ViewRoot's Touch Event : ACTION_UP
   I/flutter ( 5478): Another exception was thrown: 'package:flutter/src/rendering/object.dart': Failed assertion: line 2775 pos 14: '_debugUltimatePreviousSiblingOf(after, equals: _firstChild)': is not true.
   I/flutter ( 5478): Another exception was thrown: 'package:flutter/src/rendering/object.dart': Failed assertion: line 2775 pos 14: '_debugUltimatePreviousSiblingOf(after, equals: _firstChild)': is not true.
   I/flutter ( 5478): Another exception was thrown: 'package:flutter/src/rendering/object.dart': Failed assertion: line 2775 pos 14: '_debugUltimatePreviousSiblingOf(after, equals: _firstChild)': is not true.
   I/flutter ( 5478): Another exception was thrown: 'package:flutter/src/rendering/object.dart': Failed assertion: line 2775 pos 14: '_debugUltimatePreviousSiblingOf(after, equals: _firstChild)': is not true.
   I/flutter ( 5478): Another exception was thrown: 'package:flutter/src/widgets/framework.dart': Failed assertion: line 3497 pos 14: 'owner._debugCurrentBuildTarget == this': is not true.
   I/flutter ( 5478): Another exception was thrown: 'package:flutter/src/widgets/framework.dart': Failed assertion: line 3497 pos 14: 'owner._debugCurrentBuildTarget == this': is not true.
   I/flutter ( 5478): Another exception was thrown: 'package:flutter/src/widgets/framework.dart': Failed assertion: line 3497 pos 14: 'owner._debugCurrentBuildTarget == this': is not true.
   I/flutter ( 5478): Another exception was thrown: 'package:flutter/src/widgets/framework.dart': Failed assertion: line 3497 pos 14: 'owner._debugCurrentBuildTarget == this': is not true.
   I/flutter ( 5478): Another exception was thrown: 'package:flutter/src/widgets/framework.dart': Failed assertion: line 3497 pos 14: 'owner._debugCurrentBuildTarget == this': is not true.
   I/flutter ( 5478): Another exception was thrown: 'package:flutter/src/widgets/framework.dart': Failed assertion: line 3497 pos 14: 'owner._debugCurrentBuildTarget == this': is not true.
   I/flutter ( 5478): Another exception was thrown: 'package:flutter/src/widgets/framework.dart': Failed assertion: line 3497 pos 14: 'owner._debugCurrentBuildTarget == this': is not true.
   I/flutter ( 5478): Another exception was thrown: 'package:flutter/src/widgets/framework.dart': Failed assertion: line 3497 pos 14: 'owner._debugCurrentBuildTarget == this': is not true.
   I/flutter ( 5478): Another exception was thrown: 'package:flutter/src/widgets/framework.dart': Failed assertion: line 3497 pos 14: 'owner._debugCurrentBuildTarget == this': is not true.
   I/flutter ( 5478): Another exception was thrown: The _ScaffoldLayout custom multichild layout delegate forgot to lay out the following children:
   
7. sahil311289 commented on Jun 27, 2018

   

   sahil311289

   on Jun 27, 2018

   Last edited by zoechi

   Author

   More actions

   /Users/sahil/flutterDevelopment/flutter/bin/flutter --no-color doctor
   Doctor summary (to see all details, run flutter doctor -v):
   [✓] Flutter (Channel beta, v0.5.1, on Mac OS X 10.13.5 17F77, locale en-IN)
   [!] Android toolchain - develop for Android devices (Android SDK 28.0.0-rc1)
       ✗ Android license status unknown.
   [✓] iOS toolchain - develop for iOS devices (Xcode 9.4.1)
   [✓] Android Studio (version 3.1)
   [✓] IntelliJ IDEA Community Edition (version 2018.1.5)
   [✓] VS Code (version 1.23.1)
   [✓] Connected devices (1 available)
   
   ! Doctor found issues in 1 category.
   
8. sahil311289 commented on Jun 27, 2018

   

   sahil311289

   on Jun 27, 2018

   Last edited by zoechi

   Author

   More actions

   import 'package:flutter/material.dart';
   import 'package:flutter/foundation.dart';
   import 'bottom_navigation.dart';
   import 'theme.dart';
   import 'register.dart';
   
   void main() => runApp(new MyApp());
   
   class MyApp extends StatelessWidget {
     // This widget is the root of your application.
     @override
     Widget build(BuildContext context) {
       return new MaterialApp(
         debugShowCheckedModeBanner: false,
         title: 'GabHub',
         theme: defaultTargetPlatform == TargetPlatform.android ? tealTheme
             : iOSTheme,
         home: new BottomNavBar(),
       );
     }
   }
9. sahil311289 commented on Jun 27, 2018

   

   sahil311289

   on Jun 27, 2018

   Last edited by zoechi

   Author

   More actions

   import 'package:flutter/material.dart';
   import 'live_chat_tab_base.dart';
   import 'posts_tab_base.dart';
   import 'events_tab_base.dart';
   import 'universities_tab_base.dart';
   import 'notifications_tab_base.dart';
   import 'profile_tab_base.dart';
   
   class BottomNavBar extends StatelessWidget {
     @override
     Widget build(BuildContext context) {
       return new Scaffold(
         body: new BottomNav(),
       );
     }
   }
   
   class BottomNav extends StatefulWidget {
     @override
     _State createState() => _State();
   }
   
   class _State extends State<BottomNav> with SingleTickerProviderStateMixin {
     TabController bottomNavTabController;
   
     @override
     void initState() {
       super.initState();
       bottomNavTabController = new TabController(length: 6, vsync: this);
     }
   
     @override
     void dispose() {
       bottomNavTabController.dispose();
       super.dispose();
     }
   
     @override
     Widget build(BuildContext context) {
       return new Scaffold(
         bottomNavigationBar: new Material(
           color: Theme.of(context).platform == TargetPlatform.android
               ? Theme.of(context).primaryColor
               : Theme.of(context).primaryColor.withOpacity(0.7),
           child: new TabBar(
             indicatorColor: Theme.of(context).accentColor,
             controller: bottomNavTabController,
             tabs: <Widget>[
               new Tab(
                 icon: new Icon(Icons.edit, color: Theme.of(context).splashColor),
               ),
               new Tab(
                 icon: new Icon(Icons.question_answer,
                     color: Theme.of(context).splashColor),
               ),
               new Tab(
                 icon: new Icon(Icons.event_note,
                     color: Theme.of(context).splashColor),
               ),
               new Tab(
                 icon: new Icon(Icons.account_balance,
                     color: Theme.of(context).splashColor),
               ),
               new Tab(
                 icon: new Icon(Icons.notifications_active,
                     color: Theme.of(context).splashColor),
               ),
               new Tab(
                 icon:
                     new Icon(Icons.person, color: Theme.of(context).splashColor),
               ),
             ],
           ),
         ),
         body: new TabBarView(
           children: <Widget>[
             new LiveChatTabBase(),
             new PostsTabBase(),
             new EventsTabBase("Events"),
             new UniversitiesTabBase("Universities"),
             new NotificationsTabBase("Notifications"),
             new ProfileTabBase("Profile"),
           ],
           controller: bottomNavTabController,
         ),
       );
     }
   }
10. sahil311289 commented on Jun 27, 2018

    

    sahil311289

    on Jun 27, 2018

    Last edited by zoechi

    Author

    More actions

    import 'dart:convert';
    import 'package:flutter/material.dart';
    import 'package:flutter/cupertino.dart';
    import 'dart:math';
    import 'package:cloud_firestore/cloud_firestore.dart';
    
    const jsonCodec = const JsonCodec();
    
    class LiveChatTabBase extends StatelessWidget {
      @override
      Widget build(BuildContext context) {
        return new Scaffold(
          body: new ChatScreen(),
        );
      }
    }
    
    class ChatScreen extends StatefulWidget {
      @override
      State createState() => new ChatScreenState();
    }
    
    class ChatScreenState extends State<ChatScreen> with TickerProviderStateMixin {
      final List<ChatMessage> _messages = <ChatMessage>[];
      final TextEditingController _textController = new TextEditingController();
      bool _isComposing = false;
    
      @override
      void dispose() {
        for (ChatMessage message in _messages)
          message.animationController.dispose();
        super.dispose();
      }
    
      Widget _buildTextComposer() {
        return new IconTheme(
          data: new IconThemeData(
            color: Theme.of(context).accentColor,
          ),
          child: new Column(
            mainAxisSize: MainAxisSize.max,
            mainAxisAlignment: MainAxisAlignment.end,
            children: <Widget>[
              new Row(
                children: <Widget>[
                  new Container(
                    margin: new EdgeInsets.only(
                      left: 5.0,
                    ),
                    child: new IconButton(
                      icon: new Icon(
                        Icons.add_circle,
                        color: Colors.black87,
                        size: 28.0,
                      ),
                      onPressed: () => _handleAddContent(),
                    ),
                  ),
                  new Flexible(
                    child: Padding(
                      padding: new EdgeInsets.only(
                        left: 5.0,
                      ),
                      child: new TextField(
                        controller: _textController,
                        maxLines: null,
    //                    maxLength: 2000,
                        onChanged: (String text) {
                          setState(() {
                            _isComposing = text.replaceAll(" ", "").length > 0;
                          });
                        },
                        decoration: new InputDecoration.collapsed(
                          hintText: "Write a message",
                          hintStyle: new TextStyle(
                            color: Colors.black87,
                          ),
                        ),
                        style: new TextStyle(
                          color: Colors.black87,
                          fontSize: 17.0,
                        ),
    //                    onChanged: () => _valueChanged(_textController.text),
                      ),
                    ),
                  ),
                  new Container(
                    margin: new EdgeInsets.only(
                      right: 5.0,
                    ),
                    child: _isComposing
                        ? Theme.of(context).platform == TargetPlatform.android
                            ? new IconButton(
                                icon: new Icon(
                                  Icons.send,
                                  color: Colors.black87,
                                  size: 28.0,
                                ),
                                onPressed: () =>
                                    _handleSubmitted(_textController.text),
                              )
                            : new CupertinoButton(
                                child: new Text('Send'),
                                onPressed: () =>
                                    _handleSubmitted(_textController.text),
                              )
                        : new IconButton(
                            icon: new Icon(
                              Icons.keyboard_voice,
                              color: Colors.black87,
                              size: 28.0,
                            ),
                            onPressed: () => _handleVoiceInput(),
                          ),
                  ),
                ],
              ),
            ],
          ),
        );
      }
    
      @override
      Widget build(BuildContext context) {
        return new Scaffold(
          backgroundColor: Theme.of(context).backgroundColor,
          appBar: new AppBar(
            backgroundColor: Theme.of(context).primaryColor,
            title: new Text(
              'Live chat',
              style: new TextStyle(color: Theme.of(context).hintColor),
            ),
            elevation:
                Theme.of(context).platform == TargetPlatform.android ? 4.0 : 0.0,
          ),
          body: new Container(
              child: new Column(
                children: <Widget>[
                  new Flexible(
                    child:
    //                new ListView.builder(
    //                  padding: new EdgeInsets.all(8.0),
    //                  reverse: true,
    //                  itemBuilder: (_, int index) => _messages[index],
    //                  itemCount: _messages.length,
    //                ),
    
                        new StreamBuilder(
                      stream:
                          Firestore.instance.collection('live_chat').snapshots(),
                      builder: (context, snapshot) {
                        if (!snapshot.hasData) return const Text('Loading...');
    
                        return new ListView.builder(
                          itemCount: snapshot.data.documents.length,
                          padding: const EdgeInsets.all(8.0),
                          reverse: true,
                          itemExtent: 55.0,
                          itemBuilder: (context, index) {
                            DocumentSnapshot ds = snapshot.data.documents[index];
                            return new Text(
                              " ${ds['message']}",
                              style: TextStyle(color: Colors.white70),
                            );
                          },
                        );
                      },
                    ),
                  ),
                  new Divider(
                    height: 1.0,
                  ),
                  new Container(
                    decoration: new BoxDecoration(
                      color: Theme.of(context).cardColor, //Colors.white70,
                    ),
                    child: _buildTextComposer(),
                  ),
                ],
              ),
              decoration: Theme.of(context).platform == TargetPlatform.iOS
                  ? new BoxDecoration(
                      border: new Border(
                        top: new BorderSide(color: Colors.grey[200]),
                      ),
                    )
                  : null),
        );
      }
    
      void _handleSubmitted(String text) {
        _textController.clear();
        setState(() {
          _isComposing = false;
        });
    
        // TODO: Change color to a color based on email id so that every person's color remains constant
        final String username = "sahilwad";
        List<int> ints = username.codeUnits;
        var range = new Random();
    
        ChatMessage message = new ChatMessage(
          text,
          ints[5] + ints[6],
          ints[2],
          ints[1] + ints[0],
          ints[3] + ints[4],
          new AnimationController(
            duration: new Duration(milliseconds: 400),
            vsync: this,
          ),
        );
        setState(() {
          _messages.insert(0, message);
        });
        message.animationController.forward();
      }
    
      _handleVoiceInput() {
        print('Voice input method');
      }
    
      _handleAddContent() {
        print('Add content clicked');
      }
    }
    
    class ChatMessage extends StatelessWidget {
      final String text;
      final int colorA;
      final int colorR;
      final int colorG;
      final int colorB;
      final AnimationController animationController;
    
      ChatMessage(this.text, this.colorA, this.colorR, this.colorG, this.colorB,
          this.animationController);
    
      @override
      Widget build(BuildContext context) {
        return new SizeTransition(
          sizeFactor: new CurvedAnimation(
            parent: animationController,
            curve: Curves.easeOut,
          ),
          axisAlignment: 0.0,
          child: new Container(
            margin: const EdgeInsets.symmetric(vertical: 7.0),
            child: new Row(
              crossAxisAlignment: CrossAxisAlignment.start,
              children: <Widget>[
                new Container(
                  margin: const EdgeInsets.only(
                    right: 10.0,
                  ),
                  child: new Padding(
                    padding: new EdgeInsets.only(top: 12.0),
                    child: new CircleAvatar(
                      maxRadius: 13.0,
                      backgroundColor:
                          Color.fromARGB(colorA, colorR, colorG, colorB),
                    ),
                  ),
                ),
                new Expanded(
                  child: new Column(
                    crossAxisAlignment: CrossAxisAlignment.start,
                    children: <Widget>[
                      new Row(
                        mainAxisAlignment: MainAxisAlignment.center,
                        children: <Widget>[
                          new Padding(
                            padding: new EdgeInsets.only(
                              bottom: 4.0,
                              right: 35.0,
                            ),
                            child: new Text(
                              '25 June 2018, 4:11 am',
                              style: new TextStyle(
                                color: Theme.of(context).platform ==
                                        TargetPlatform.android
                                    ? Colors.white70
                                    : Colors.black54,
                                fontSize: 12.0,
                                letterSpacing: 0.6,
                              ),
                            ),
                          ),
                        ],
                      ),
                      new Container(
                        width: 300.0,
                        child: new Text(
                          text,
                          style: new TextStyle(
                            color:
                                Theme.of(context).platform == TargetPlatform.android
                                    ? Colors.white
                                    : Colors.black87,
                            letterSpacing: 0.4,
                          ),
                        ),
                      ),
                    ],
                  ),
                ),
              ],
            ),
          ),
        );
      }
    }
11. sahil311289 commented on Jun 27, 2018

    

    sahil311289

    on Jun 27, 2018

    Last edited by zoechi

    Author

    More actions

    import 'package:flutter/material.dart';
    
    class NotificationsTabBase extends StatelessWidget {
      final String title;
    
      NotificationsTabBase(this.title);
    
      @override
      Widget build(BuildContext context) {
        return new Scaffold(
          backgroundColor: Theme.of(context).backgroundColor,
          appBar: new AppBar(
            title: new Text(
              title,
              style: new TextStyle(
                color: Theme.of(context).hintColor,
              ),
            ),
            elevation:
                Theme.of(context).platform == TargetPlatform.android ? 4.0 : 0.0,
            backgroundColor: Theme.of(context).primaryColor,
          ),
          body: new Container(
              child: new Center(
                child: new Text(title),
              ),
              decoration: Theme.of(context).platform == TargetPlatform.iOS
                  ? new BoxDecoration(
                      border: new Border(
                        top: new BorderSide(color: Colors.grey[200]),
                      ),
                    )
                  : null),
        );
      }
    }
12. sahil311289 commented on Jun 27, 2018

    

    sahil311289

    on Jun 27, 2018

    Last edited by sahil311289

    Author

    More actions

    1. If I comment using the live_chat tab and click on notification tab, the code breaks!
    2. Typing in a TextField gets me only white space once the keyboard is up. I've seen threads for non-TabBar pages and they are still manageable but while in a TabBar, Android still gives you the option of Back icon which closes the keyboard so I was able to post content. While in iOS once the keyboard is up, I have white screen and nothing else to do since there is no back button.

    Also, you may not be able to see but I have top level TabBar within Bottom TabBar on some tabs. So it's a complex structure. Please help!

    As much as I wanted to keep the code private, I guess there is no other option. I have a private repo on GitHub.
13. sahil311289 commented on Jun 28, 2018

    

    sahil311289

    on Jun 28, 2018

    Author

    More actions

    I'm now using BottomNavigationBar instead of TabBar for bottom navigation. That fixed one of the issues. The app doesn't crash while switching between tabs.
14. 12 remaining items

    Load more

15. apat183 commented on Aug 27, 2018

    

    apat183

    on Aug 27, 2018

    More actions

    @andrescr94 you might need to use TextEditingControllers but i wouldn't use my temp solution anymore. I ended up moving to a move permanent solution of navigating to form in new page rather then in tab page and everything working fine now.
16. HerrNiklasRaab commented on Dec 7, 2018

    

    HerrNiklasRaab

    on Dec 7, 2018

    More actions

    Any updates on this issue, it is also occuring on my app, do you need code examples or something else?
17. zoechi

    added this to the GoalsThis milestone has been deleted milestone on Dec 7, 2018
18. vijaykanta commented on Mar 6, 2019

    

    vijaykanta

    on Mar 6, 2019

    More actions

    This happens to me when I use an ExpandedTile widget and have gridview inside each tile. Both grid and tile are growable. Each grid view taps to open a dialog with a text field.

    I/flutter (11555): ══╡ EXCEPTION CAUGHT BY WIDGETS LIBRARY ╞═══════════════════════════════════════════════════════════
    I/flutter (11555): The following assertion was thrown while finalizing the widget tree:
    I/flutter (11555): 'package:flutter/src/widgets/scroll_position.dart': Failed assertion: line 683 pos 12: 'pixels !=
    I/flutter (11555): null': is not true.
    I/flutter (11555): 
    I/flutter (11555): Either the assertion indicates an error in the framework itself, or we should provide substantially
    I/flutter (11555): more information in this error message to help you determine and fix the underlying cause.
    I/flutter (11555): In either case, please report this assertion by filing a bug on GitHub:
    I/flutter (11555):   https://github.com/flutter/flutter/issues/new?template=BUG.md
    I/flutter (11555): 
    I/flutter (11555): When the exception was thrown, this was the stack:
    I/flutter (11555): #2      ScrollPosition.dispose (package:flutter/src/widgets/scroll_position.dart:683:12)
    I/flutter (11555): #3      ScrollPositionWithSingleContext.dispose (package:flutter/src/widgets/scroll_position_with_single_context.dart:255:11)
    I/flutter (11555): #4      ScrollableState.dispose (package:flutter/src/widgets/scrollable.dart:343:14)
    I/flutter (11555): #5      StatefulElement.unmount (package:flutter/src/widgets/framework.dart:3900:12)
    I/flutter (11555): #6      _InactiveElements._unmount (package:flutter/src/widgets/framework.dart:1709:13)
    I/flutter (11555): #7      _InactiveElements._unmount.<anonymous closure> (package:flutter/src/widgets/framework.dart:1707:7)
    I/flutter (11555): #8      ComponentElement.visitChildren (package:flutter/src/widgets/framework.dart:3755:14)
    I/flutter (11555): #9      _InactiveElements._unmount (package:flutter/src/widgets/framework.dart:1705:13)
    I/flutter (11555): #10     _InactiveElements._unmount.<anonymous closure> (package:flutter/src/widgets/framework.dart:1707:7)
    I/flutter (11555): #11     ComponentElement.visitChildren (package:flutter/src/widgets/framework.dart:3755:14)
    I/flutter (11555): #12     _InactiveElements._unmount (package:flutter/src/widgets/framework.dart:1705:13)
    I/flutter (11555): #13     _InactiveElements._unmount.<anonymous closure> (package:flutter/src/widgets/framework.dart:1707:7)
    I/flutter (11555): #14     ComponentElement.visitChildren (package:flutter/src/widgets/framework.dart:3755:14)
    I/flutter (11555): #15     _InactiveElements._unmount (package:flutter/src/widgets/framework.dart:1705:13)
    I/flutter (11555): #16     _InactiveElements._unmount.<anonymous closure> (package:flutter/src/widgets/framework.dart:1707:7)
    I/flutter (11555): #17     ComponentElement.visitChildren (package:flutter/src/widgets/framework.dart:3755:14)
    I/flutter (11555): #18     _InactiveElements._unmount (package:flutter/src/widgets/framework.dart:1705:13)
    I/flutter (11555): #19     _InactiveElements._unmount.<anonymous closure> (package:flutter/src/widgets/framework.dart:1707:7)
    I/flutter (11555): #20     MultiChildRenderObjectElement.visitChildren (package:flutter/src/widgets/framework.dart:4948:16)
    I/flutter (11555): #21     _InactiveElements._unmount (package:flutter/src/widgets/framework.dart:1705:13)
    I/flutter (11555): #22     _InactiveElements._unmount.<anonymous closure> (package:flutter/src/widgets/framework.dart:1707:7)
    I/flutter (11555): #23     ComponentElement.visitChildren (package:flutter/src/widgets/framework.dart:3755:14)
    I/flutter (11555): #24     _InactiveElements._unmount (package:flutter/src/widgets/framework.dart:1705:13)
    I/flutter (11555): #25     _InactiveElements._unmount.<anonymous closure> (package:flutter/src/widgets/framework.dart:1707:7)
    I/flutter (11555): #26     ComponentElement.visitChildren (package:flutter/src/widgets/framework.dart:3755:14)
    I/flutter (11555): #27     _InactiveElements._unmount (package:flutter/src/widgets/framework.dart:1705:13)
    I/flutter (11555): #28     _InactiveElements._unmount.<anonymous closure> (package:flutter/src/widgets/framework.dart:1707:7)
    I/flutter (11555): #29     ComponentElement.visitChildren (package:flutter/src/widgets/framework.dart:3755:14)
    I/flutter (11555): #30     _InactiveElements._unmount (package:flutter/src/widgets/framework.dart:1705:13)
    I/flutter (11555): #31     _InactiveElements._unmount.<anonymous closure> (package:flutter/src/widgets/framework.dart:1707:7)
    I/flutter (11555): #32     SingleChildRenderObjectElement.visitChildren (package:flutter/src/widgets/framework.dart:4848:14)
    I/flutter (11555): #33     _InactiveElements._unmount (package:flutter/src/widgets/framework.dart:1705:13)
    I/flutter (11555): #34     _InactiveElements._unmount.<anonymous closure> (package:flutter/src/widgets/framework.dart:1707:7)
    I/flutter (11555): #35     ComponentElement.visitChildren (package:flutter/src/widgets/framework.dart:3755:14)
    I/flutter (11555): #36     _InactiveElements._unmount (package:flutter/src/widgets/framework.dart:1705:13)
    I/flutter (11555): #37     _InactiveElements._unmount.<anonymous closure> (package:flutter/src/widgets/framework.dart:1707:7)
    I/flutter (11555): #38     SingleChildRenderObjectElement.visitChildren (package:flutter/src/widgets/framework.dart:4848:14)
    I/flutter (11555): #39     _InactiveElements._unmount (package:flutter/src/widgets/framework.dart:1705:13)
    I/flutter (11555): #40     _InactiveElements._unmount.<anonymous closure> (package:flutter/src/widgets/framework.dart:1707:7)
    I/flutter (11555): #41     ComponentElement.visitChildren (package:flutter/src/widgets/framework.dart:3755:14)
    I/flutter (11555): #42     _InactiveElements._unmount (package:flutter/src/widgets/framework.dart:1705:13)
    I/flutter (11555): #43     _InactiveElements._unmount.<anonymous closure> (package:flutter/src/widgets/framework.dart:1707:7)
    I/flutter (11555): #44     ComponentElement.visitChildren (package:flutter/src/widgets/framework.dart:3755:14)
    I/flutter (11555): #45     _InactiveElements._unmount (package:flutter/src/widgets/framework.dart:1705:13)
    I/flutter (11555): #46     _InactiveElements._unmount.<anonymous closure> (package:flutter/src/widgets/framework.dart:1707:7)
    I/flutter (11555): #47     ComponentElement.visitChildren (package:flutter/src/widgets/framework.dart:3755:14)
    I/flutter (11555): #48     _InactiveElements._unmount (package:flutter/src/widgets/framework.dart:1705:13)
    I/flutter (11555): #49     _InactiveElements._unmount.<anonymous closure> (package:flutter/src/widgets/framework.dart:1707:7)
    I/flutter (11555): #50     ComponentElement.visitChildren (package:flutter/src/widgets/framework.dart:3755:14)
    I/flutter (11555): #51     _InactiveElements._unmount (package:flutter/src/widgets/framework.dart:1705:13)
    I/flutter (11555): #52     _InactiveElements._unmount.<anonymous closure> (package:flutter/src/widgets/framework.dart:1707:7)
    I/flutter (11555): #53     ComponentElement.visitChildren (package:flutter/src/widgets/framework.dart:3755:14)
    I/flutter (11555): #54     _InactiveElements._unmount (package:flutter/src/widgets/framework.dart:1705:13)
    I/flutter (11555): #55     _InactiveElements._unmount.<anonymous closure> (package:flutter/src/widgets/framework.dart:1707:7)
    I/flutter (11555): #56     ComponentElement.visitChildren (package:flutter/src/widgets/framework.dart:3755:14)
    I/flutter (11555): #57     _InactiveElements._unmount (package:flutter/src/widgets/framework.dart:1705:13)
    I/flutter (11555): #58     _InactiveElements._unmount.<anonymous closure> (package:flutter/src/widgets/framework.dart:1707:7)
    I/flutter (11555): #59     ComponentElement.visitChildren (package:flutter/src/widgets/framework.dart:3755:14)
    I/flutter (11555): #60     _InactiveElements._unmount (package:flutter/src/widgets/framework.dart:1705:13)
    I/flutter (11555): #61     ListIterable.forEach (dart:_internal/iterable.dart:39:13)
    I/flutter (11555): #62     _InactiveElements._unmountAll (package:flutter/src/widgets/framework.dart:1718:25)
    I/flutter (11555): #63     BuildOwner.finalizeTree.<anonymous closure> (package:flutter/src/widgets/framework.dart:2372:27)
    I/flutter (11555): #64     BuildOwner.lockState (package:flutter/src/widgets/framework.dart:2204:15)
    I/flutter (11555): #65     BuildOwner.finalizeTree (package:flutter/src/widgets/framework.dart:2371:7)
    I/flutter (11555): #66     _WidgetsFlutterBinding&BindingBase&GestureBinding&ServicesBinding&SchedulerBinding&PaintingBinding&SemanticsBinding&RendererBinding&WidgetsBinding.drawFrame (package:flutter/src/widgets/binding.dart:678:18)
    I/flutter (11555): #67     _WidgetsFlutterBinding&BindingBase&GestureBinding&ServicesBinding&SchedulerBinding&PaintingBinding&SemanticsBinding&RendererBinding._handlePersistentFrameCallback (package:flutter/src/rendering/binding.dart:219:5)
    I/flutter (11555): #68     _WidgetsFlutterBinding&BindingBase&GestureBinding&ServicesBinding&SchedulerBinding._invokeFrameCallback (package:flutter/src/scheduler/binding.dart:990:15)
    I/flutter (11555): #69     _WidgetsFlutterBinding&BindingBase&GestureBinding&ServicesBinding&SchedulerBinding.handleDrawFrame (package:flutter/src/scheduler/binding.dart:930:9)
    I/flutter (11555): #70     _WidgetsFlutterBinding&BindingBase&GestureBinding&ServicesBinding&SchedulerBinding.scheduleWarmUpFrame.<anonymous closure> (package:flutter/src/scheduler/binding.dart:751:7)
    I/flutter (11555): #72     _Timer._runTimers (dart:isolate/runtime/libtimer_impl.dart:382:19)
    I/flutter (11555): #73     _Timer._handleMessage (dart:isolate/runtime/libtimer_impl.dart:416:5)
    I/flutter (11555): #74     _RawReceivePortImpl._handleMessage (dart:isolate/runtime/libisolate_patch.dart:171:12)
    I/flutter (11555): (elided 3 frames from class _AssertionError and package dart:async)
    I/flutter (11555): ════════════════════════════════════════════════════════════════════════════════════════════════════
    D/libGLESv2(11555): STS_GLApi : DTS, ODTC are not allowed for Package : com.xx.xx.xx
    

    👍React with 👍2Reacted by nikhil-francium and Théo champion
19. gildaswise commented on Mar 22, 2019

    

    gildaswise

    on Mar 22, 2019

    Contributor

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    I'm having the same issue and the fix of removing the assert solved it for me, but I'm not using TabBars and the issue happens when either using Navigator.of(context).pop() or the automatically generated BackButton for the AppBar. The error doesn't happen when in release mode, only when in debug.
20. vijaykanta commented on Mar 22, 2019

    

    vijaykanta

    on Mar 22, 2019 via email

    More actions

    Hi all I could resolve this issue by removing a parent scrollview inside which I had a listview. The parent is a column and the child listview in wrapped inside an expanded widget Get Outlook for iOS<https://aka.ms/o0ukef>

    …

    ________________________________ From: Gildásio Filho <[email protected]> Sent: Friday, March 22, 2019 7:14:42 PM To: flutter/flutter Cc: vijaykanta; Comment Subject: Re: [flutter/flutter] Exception while scrolling through TabBar navigation (#18756) I'm having the same issue and the fix of removing the assert solved it for me, but I'm not using TabBars and the issue happens when either using Navigator.of(context).pop() or the automatically generated BackButton for the AppBar. The error doesn't happen when in release mode, only when in debug. — You are receiving this because you commented. Reply to this email directly, view it on GitHub<#18756 (comment)>, or mute the thread<https://github.com/notifications/unsubscribe-auth/AB5YVdI3nobMgWPlhMo1yotXvjdntbBSks5vZN5KgaJpZM4U020J>.
21. HansMuller

    assigned

    shihaohong

    on Apr 3, 2019
22. MichaelDark commented on Apr 4, 2019

    

    MichaelDark

    on Apr 4, 2019

    Last edited by MichaelDark

    More actions

    Hi! The solution is just not to forget to dispose TabContoller:

    @override
      void dispose() {
        _tabController.dispose();
        super.dispose();
      }
    

    Check, please, if it is the right solution and tag people who faced this trouble in this issue
    I think you know how to do it, @escamoteur
    @shihaohong, could you have a look at this please?
23. shihaohong commented on Apr 4, 2019

    

    shihaohong

    on Apr 4, 2019

    Contributor

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    Hi @MichaelDark, I'm currently working through a different issue, but I'm planning to get to this this after I'm done. That could definitely be a solution for some, if they forget to dispose their TabControllers. I'll provide an update once I've had an opportunity to dive deeper into the issue.
24. shihaohong commented on Apr 5, 2019

    

    shihaohong

    on Apr 5, 2019

    Contributor

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    I looked at @ajinasokan's first gist and noticed that TabController was paired with BottomNavigationBar, and I'm not sure if they were meant to be used like that. I was able to get a running sample using BottomNavigationBar, while nesting the TabBarView.

    However, I did create a reproducible sample that throws the exception with two TabBar/TabBarView/TabController combinations, and will be looking into it.
25. MichaelDark commented on Apr 5, 2019

    

    MichaelDark

    on Apr 5, 2019 via email

    More actions

    I think it would be useful. I did not use BottomNavigationBar and I think this issue is related with deeper level of `flutter/material`. I had a TabView/TabBar/TabController in of tabs of the another TabView/TabBar/TabController, and it throws the exception that you have mentioned before

    …

    On Fri, Apr 5, 2019, 11:51 PM Shi-Hao Hong ***@***.***> wrote: I looked at @ajinasokan <https://github.com/ajinasokan>'s first gist <https://gist.github.com/ajinasokan/e9fc78e5eaad5b60bff22411b3d084a1> and noticed that TabController was paired with BottomNavigationBar, and I'm not sure if they were meant to be used like that. I was able to get a running sample <https://gist.github.com/shihaohong/ba4512652c2bf1b638821afe68c5729d> using BottomNavigationBar, while nesting the TabBarView. However, I did create a reproducible sample <https://gist.github.com/shihaohong/1909464287ce2f23b74088cf95ce02a6> that throws the exception with two TabBar/TabBarView/TabController combinations, and will be looking into it. — You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub <#18756 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AbPPYeSDsv5MnxTpeb2puDbyT7v1zGlzks5vd7dOgaJpZM4U020J> .
26. mrgray commented on Apr 27, 2019

    

    mrgray

    on Apr 27, 2019

    More actions

    I resolved it during debug by commenting out assert(pixels != null);, but that's not very kewl. I'm not using TabView or TabBar or TabController. I'm rendering conditional widgets with BottomAppBar and InkWell tabs.
27. shihaohong

    closed this as completedin #31581on May 4, 2019
28. github-actions commented on Aug 15, 2021

    

    github-actionsbot

    on Aug 15, 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.
29. github-actions

    locked as resolved and limited conversation to collaborators on Aug 15, 2021