RangeError when selecting text in SelectionArea #161931
Description
Steps to reproduce
- Select the text "Hello".
- Use
Shift + Left Arrowto expand the selected text towards the start. - After reaching the beginning of the text, pressing
Shift + Left Arrowcauses an error (RangeError). - While "Hello" is selected, click on the text in the first line (AssertionError).
Expected results
- The text selection stops gracefully at the beginning of the text.
- No errors or unexpected behavior occur when interacting with the text on Line 1.
Actual results
- Using
Shift + Left Arrowbeyond the start of the text causes a runtime error. - Clicking on the text in the first line triggers an AssertionError.
Code sample
Code sample
import 'package:flutter/material.dart';
void main() {
runApp(const MyApp());
}
class MyApp extends StatelessWidget {
const MyApp({super.key});
@override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Flutter Demo',
theme: ThemeData(
primarySwatch: Colors.blue,
),
home: const MyHomePage(title: 'Flutter Demo Home Page'),
);
}
}
class MyHomePage extends StatelessWidget {
const MyHomePage({super.key, required this.title});
final String title;
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text(title),
),
body: const Center(
child: SelectionArea(
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: [
Directionality(
textDirection: TextDirection.ltr,
child: Text('This is the first line.'),
),
Directionality(
textDirection: TextDirection.ltr,
child: Text('hello'),
),
],
),
),
),
);
}
}Screenshots or Video
Video demonstration
20250121-0755-17.1696126.mp4
Logs
Logs
══╡ EXCEPTION CAUGHT BY SERVICES LIBRARY ╞══════════════════════════════════════════════════════════
The following IndexError was thrown while processing the key message handler:
RangeError (index): Index out of range: index should be less than 1: 1
When the exception was thrown, this was the stack
KeyMessage: KeyMessage([KeyDownEvent#3c2fc(physicalKey: PhysicalKeyboardKey#70050(usbHidUsage:
"0x00070050", debugName: "Arrow Left"), logicalKey: LogicalKeyboardKey#7a008(keyId: "0x100000302",
keyLabel: "Arrow Left", debugName: "Arrow Left"), character: null, timeStamp: 0:00:08.077599)])
════════════════════════════════════════════════════════════════════════════════════════════════════
Another exception was thrown: Assertion failed: file:///opt/flutter/packages/flutter/lib/src/widgets/selectable_region.dart:2807:14Flutter Doctor output
This has been tested on DartPad with Dart SDK 3.6.1 and Flutter SDK 3.27.2 (Stable Channel). However, I also encountered this issue on Windows.
Doctor output
[√] Flutter (Channel master, 3.28.0-2.0.pre.38795, on Microsoft Windows [Version 10.0.22635.4800]) [6.7s]
• Flutter version 3.28.0-2.0.pre.38795 on channel master
• Upstream repository https://github.com/flutter/flutter.git
• Framework revision 79550446df (16 hours ago), 2025-01-20 19:10:34 +0330
• Engine revision 63110570da
• Dart version 3.8.0 (build 3.8.0-1.0.dev)
• DevTools version 2.42.0
[√] Windows Version (11 Enterprise 64-bit, 23H2, 2009) [3.3s]
[√] Android toolchain - develop for Android devices (Android SDK version 33.0.1) [11.7s]
• Platform android-35, build-tools 33.0.1
• Java version OpenJDK Runtime Environment (build 17.0.11+0--11852314)
• All Android licenses accepted.
[√] Chrome - develop for the web [194ms]
[√] Visual Studio - develop Windows apps (Visual Studio Community 2022 17.12.4) [193ms]
• Visual Studio at C:\Program Files\Microsoft Visual Studio\2022\Community
• Visual Studio Community 2022 version 17.12.35707.178
• Windows 10 SDK version 10.0.22621.0
[√] Android Studio (version 2024.1) [34ms]
• 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 17.0.11+0--11852314)
[√] Connected device (3 available) [219ms]
• Windows (desktop) • windows • windows-x64 • Microsoft Windows [Version 10.0.22635.4800]
• Chrome (web) • chrome • web-javascript • Google Chrome 131.0.6778.265
• Edge (web) • edge • web-javascript • Microsoft Edge 132.0.2957.111
[√] Network resources [893ms]
• All expected network resources are available.
• No issues found!