TabBar crash with SliverAppBar #158158
Description
Steps to reproduce
- Run example codes.
- Tap the top button to add a tab.
Expected results
No crash.
Actual results
Crashed.
Code sample
Code sample
import 'package:flutter/material.dart';
void main() {
final List<Tab> tabs = <Tab>[];
runApp(MaterialApp(
home: StatefulBuilder(
builder: (BuildContext context, StateSetter setState) {
return DefaultTabController(
length: tabs.length,
child: Scaffold(
body: CustomScrollView(
slivers: <Widget>[
SliverAppBar(
actions: <Widget>[
TextButton(
child: const Text('Add Tab'),
onPressed: () {
setState(() {
tabs.add(Tab(text: 'Tab ${tabs.length + 1}'));
});
},
),
],
bottom: TabBar(tabs: tabs),
),
],
),
),
);
},
),
));
}Screenshots or Video
Screenshots / Video demonstration
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Logs
Logs
======== Exception caught by widgets library =======================================================
The following RangeError was thrown building TabBar(dirty, dependencies: [InheritedCupertinoTheme, MediaQuery, _InheritedTheme, _LocalizationsScope-[GlobalKey#ea041], _TabControllerScope], state: _TabBarState#f6f77):
RangeError (index): Invalid value: Valid value range is empty: 0
The relevant error-causing widget was:
Column Column:file:///D:/Flutter/packages/flutter/lib/src/material/app_bar.dart:1101:16
When the exception was thrown, this was the stack:
#0 List._setIndexed (dart:core-patch/growable_array.dart:274:49)
#1 List.[]= (dart:core-patch/growable_array.dart:269:5)
#2 _TabBarState.build.<anonymous closure> (package:flutter/src/material/tabs.dart:1752:21)
#3 new _GrowableList.generate (dart:core-patch/growable_array.dart:136:28)
#4 _TabBarState.build (package:flutter/src/material/tabs.dart:1741:38)
#5 StatefulElement.build (package:flutter/src/widgets/framework.dart:5748:27)
#6 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5636:15)
#7 StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5799:11)
#8 Element.rebuild (package:flutter/src/widgets/framework.dart:5347:7)
#9 BuildScope._tryRebuild (package:flutter/src/widgets/framework.dart:2694:15)
#10 BuildScope._flushDirtyElements (package:flutter/src/widgets/framework.dart:2753:11)
#11 BuildOwner.buildScope (package:flutter/src/widgets/framework.dart:3048:18)
#12 WidgetsBinding.drawFrame (package:flutter/src/widgets/binding.dart:1176:21)
#13 RendererBinding._handlePersistentFrameCallback (package:flutter/src/rendering/binding.dart:475:5)
#14 SchedulerBinding._invokeFrameCallback (package:flutter/src/scheduler/binding.dart:1397:15)
#15 SchedulerBinding.handleDrawFrame (package:flutter/src/scheduler/binding.dart:1318:9)
#16 SchedulerBinding._handleDrawFrame (package:flutter/src/scheduler/binding.dart:1176:5)
#17 _invoke (dart:ui/hooks.dart:312:13)
#18 PlatformDispatcher._drawFrame (dart:ui/platform_dispatcher.dart:427:5)
#19 _drawFrame (dart:ui/hooks.dart:283:31)
====================================================================================================Flutter Doctor output
Doctor output
Flutter 3.27.0-1.0.pre.348 • channel [user-branch] • unknown source
Framework • revision 8ce47b6cb1 (20 hours ago) • 2024-11-04 20:26:49 +0800
Engine • revision 05cb5d7f79
Tools • Dart 3.7.0 (build 3.7.0-95.0.dev) • DevTools 2.40.1