_handleChange in _AnimationState throws (setState() called after dispose(): _AnimatedState#e2d24(lifecycle state: defunct, not mounted)) #144087
Description
Steps to reproduce
I updated flutter today and noticed the following error:
I use Riverpod to update my states. (Reproducible without Riverpod too. See first comment)
I handle the state of the content and number of tabs of my TabBar with it.
When I add a new tab and update the state with Riverpod, the TabBar gets rebuild.
When I try to open the new created tab, the app crashes. The error:
"setState() called after dispose(): _AnimatedState#e2d24(lifecycle state: defunct, not mounted)"
I looked into the stack trace and noticed that there is a method:
void _handleChange() {
setState(() {
// The listenable's state is our build state, and it changed already.
});
}
and its in C:\dev\flutter\packages\flutter\lib\src\widgets\transitions.dart_AnimatedState_handleChange
When I comment out the "setState" my app works again.
Expected results
When I create new tabs in my TabBar, I should be able to select them.
Actual results
The app crashes when I try to select the new tab with the error message: "setState() called after dispose(): _AnimatedState#e2d24(lifecycle state: defunct, not mounted)"
Code sample
Code sample
final tabsProvider = StateProvider<int>((ref) {
return 1;
});
class MyApp extends StatelessWidget {
const MyApp({super.key});
static const String _title = 'Flutter Stateful Clicker Counter';
// This widget is the root of your application.
@override
Widget build(BuildContext context) {
return const MaterialApp(
title: _title,
home: MyHomePage(),
);
}
}
class MyHomePage extends ConsumerWidget {
const MyHomePage({super.key});
// This widget is the root of your application.
@override
Widget build(BuildContext context, WidgetRef ref) {
final tabs = ref.watch(tabsProvider);
return DefaultTabController(
length: tabs,
child: Scaffold(
appBar: AppBar(
title: const Text('Flutter Demo Click Counter'),
bottom: TabBar(
tabAlignment: TabAlignment.start,
isScrollable: true,
tabs: createTabs(tabs),
),
),
body: TabBarView(
children: createTabViews(tabs),
),
floatingActionButton: FloatingActionButton(
onPressed: () => ref.read(tabsProvider.notifier).state = tabs + 1,
tooltip: 'Increment',
child: const Icon(Icons.add),
),
),
);
}
}
List<Tab> createTabs(int tabs) {
final List<Tab> tabList = [];
for (var i = 0; i < tabs; i++) {
tabList.add(Tab(
text: "Tab $i",
));
}
return tabList;
}
List<Text> createTabViews(int tabs) {
final List<Text> allTabs = [];
for (var i = 0; i < tabs; i++) {
allTabs.add(Text("View $i"));
}
return allTabs;
}Screenshots or Video
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Doctor output
[√] Flutter (Channel stable, 3.19.1, on Microsoft Windows [Version 10.0.22631.3155], locale en-CH)
• Flutter version 3.19.1 on channel stable at C:\dev\flutter
• Upstream repository https://github.com/flutter/flutter.git
• Framework revision abb292a07e (4 days ago), 2024-02-20 14:35:05 -0800
• Engine revision 04817c99c9
• Dart version 3.3.0
• DevTools version 2.31.1
[√] Windows Version (Installed version of Windows is version 10 or higher)
[√] Android toolchain - develop for Android devices (Android SDK version 34.0.0)
• Android SDK at C:\Users\rsu\AppData\Local\Android\sdk
• Platform android-34, build-tools 34.0.0
• Java binary at: C:\Program Files\Android\Android Studio\jbr\bin\java
• Java version OpenJDK Runtime Environment (build 17.0.7+0-b2043.56-10550314)
• All Android licenses accepted.
[√] Chrome - develop for the web
• Chrome at C:\Program Files\Google\Chrome\Application\chrome.exe
[√] Visual Studio - develop Windows apps (Visual Studio Community 2022 17.1.5)
• Visual Studio at C:\Program Files\Microsoft Visual Studio\2022\Community
• Visual Studio Community 2022 version 17.1.32414.318
• Windows 10 SDK version 10.0.19041.0
[√] Android Studio (version 2023.1)
• Android Studio at C:\Program Files\Android\Android Studio
• Flutter plugin can be installed from:
https://plugins.jetbrains.com/plugin/9212-flutter
• Dart plugin can be installed from:
https://plugins.jetbrains.com/plugin/6351-dart
• Java version OpenJDK Runtime Environment (build 17.0.7+0-b2043.56-10550314)
[√] IntelliJ IDEA Ultimate Edition (version 2022.2)
• IntelliJ at C:\Users\rsu\AppData\Local\JetBrains\Toolbox\apps\IDEA-U\ch-0\222.4345.14
• Flutter plugin can be installed from:
https://plugins.jetbrains.com/plugin/9212-flutter
• Dart plugin can be installed from:
https://plugins.jetbrains.com/plugin/6351-dart
[√] VS Code (version 1.86.2)
• VS Code at C:\Users\rsu\AppData\Local\Programs\Microsoft VS Code
• Flutter extension version 3.82.0
[√] Connected device (4 available)
• sdk gphone64 x86 64 (mobile) • emulator-5554 • android-x64 • Android 14 (API 34) (emulator)
• Windows (desktop) • windows • windows-x64 • Microsoft Windows [Version 10.0.22631.3155]
• Chrome (web) • chrome • web-javascript • Google Chrome 121.0.6167.162
• Edge (web) • edge • web-javascript • Microsoft Edge 121.0.2277.128
[√] Network resources
• All expected network resources are available.
• No issues found!Metadata
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High-priority issues at the top of the work listError messages from the Flutter frameworkFound to occur in 3.19Found to occur in 3.20flutter/packages/flutter repository. See also f: labels.The issue has been confirmed reproducible and is ready to work onIssue is closed as already fixed in a newer versionOwned by Framework teamTriaged by Framework team