Selecting text in readOnly TextField on iOS throws assertion exception #170521
Description
Original issue: fleather-editor/fleather#513
Steps to reproduce
- Create a read-only
TextField - Select part of the text to show the context menu
Expected results
It should show the context menu.
Actual results
Throws an assertion exception and no context menu.
Code sample
Code sample
import 'package:flutter/material.dart';
void main() {
runApp(MaterialApp(home: const HomePage()));
}
class HomePage extends StatelessWidget {
const HomePage({super.key});
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(),
body: TextField(
readOnly: true,
controller: TextEditingController(text: 'Test'),
),
);
}
}Screenshots or Video
Screenshots / Video demonstration
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Logs
Logs
════════ Exception caught by widgets library ═══════════════════════════════════
The following assertion was thrown building SystemContextMenu(dirty, dependencies: [MediaQuery, _LocalizationsScope-[GlobalKey#643d1]], state: _SystemContextMenuState#fbbfc):
Currently, the system context menu can only be shown for an active text input connection
'package:flutter/src/services/text_input.dart':
Failed assertion: line 2734 pos 7: 'TextInput._instance._currentConnection != null'
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?template=02_bug.yml
The relevant error-causing widget was:
MaterialApp MaterialApp:file:///lib/main.dart:20:41
When the exception was thrown, this was the stack:
#2 SystemContextMenuController.showWithItems (package:flutter/src/services/text_input.dart:2734:7)
text_input.dart:2734
#3 _SystemContextMenuState.build (package:flutter/src/widgets/system_context_menu.dart:167:36)
system_context_menu.dart:167
#4 StatefulElement.build (package:flutter/src/widgets/framework.dart:5823:27)
framework.dart:5823
#5 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5715:15)
framework.dart:5715
#6 StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5874:11)
framework.dart:5874
#7 Element.rebuild (package:flutter/src/widgets/framework.dart:5427:7)
framework.dart:5427
#8 ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:5697:5)
framework.dart:5697
#9 StatefulElement._firstBuild (package:flutter/src/widgets/framework.dart:5865:11)
framework.dart:5865
#10 ComponentElement.mount (package:flutter/src/widgets/framework.dart:5691:5)
framework.dart:5691
... Normal element mounting (64 frames)
#74 Element.inflateWidget (package:flutter/src/widgets/framework.dart:4539:16)
framework.dart:4539
#75 MultiChildRenderObjectElement.inflateWidget (package:flutter/src/widgets/framework.dart:7159:36)
framework.dart:7159
#76 Element.updateChild (package:flutter/src/widgets/framework.dart:4004:18)
framework.dart:4004
#77 Element.updateChildren (package:flutter/src/widgets/framework.dart:4201:11)
framework.dart:4201
#78 MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:7192:17)
framework.dart:7192
#79 Element.updateChild (package:flutter/src/widgets/framework.dart:3982:15)
framework.dart:3982
#80 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5738:16)
framework.dart:5738
#81 StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5874:11)
framework.dart:5874
#82 Element.rebuild (package:flutter/src/widgets/framework.dart:5427:7)
framework.dart:5427
#83 BuildScope._tryRebuild (package:flutter/src/widgets/framework.dart:2694:15)
framework.dart:2694
#84 BuildScope._flushDirtyElements (package:flutter/src/widgets/framework.dart:2752:11)
framework.dart:2752
#85 BuildOwner.buildScope (package:flutter/src/widgets/framework.dart:3056:18)
framework.dart:3056
#86 WidgetsBinding.drawFrame (package:flutter/src/widgets/binding.dart:1240:21)
binding.dart:1240
#87 RendererBinding._handlePersistentFrameCallback (package:flutter/src/rendering/binding.dart:495:5)
binding.dart:495
#88 SchedulerBinding._invokeFrameCallback (package:flutter/src/scheduler/binding.dart:1438:15)
binding.dart:1438
#89 SchedulerBinding.handleDrawFrame (package:flutter/src/scheduler/binding.dart:1351:9)
binding.dart:1351
#90 SchedulerBinding._handleDrawFrame (package:flutter/src/scheduler/binding.dart:1204:5)
binding.dart:1204
#91 _invoke (dart:ui/hooks.dart:331:13)
hooks.dart:331
#92 PlatformDispatcher._drawFrame (dart:ui/platform_dispatcher.dart:444:5)
platform_dispatcher.dart:444
#93 _drawFrame (dart:ui/hooks.dart:303:31)
hooks.dart:303
(elided 2 frames from class _AssertionError)
════════════════════════════════════════════════════════════════════════════════Flutter Doctor output
Doctor output
[✓] Flutter (Channel stable, 3.32.0, on macOS 15.4 24E248 darwin-arm64, locale
en-US) [715ms]
• Flutter version 3.32.0 on channel stable at
/fvm/versions/3.32.0
• Upstream repository https://github.com/flutter/flutter.git
• Framework revision be698c48a6 (3 weeks ago), 2025-05-19 12:59:14 -0700
• Engine revision 1881800949
• Dart version 3.8.0
• DevTools version 2.45.1
[✓] Android toolchain - develop for Android devices (Android SDK version 35.0.0)
[10.6s]
• Android SDK at /SDK
• Platform android-35, build-tools 35.0.0
• ANDROID_HOME = /SDK
• Java binary at: /Applications/Android
Studio.app/Contents/jbr/Contents/Home/bin/java
This is the JDK bundled with the latest Android Studio installation on
this machine.
To manually set the JDK path, use: `flutter config
--jdk-dir="path/to/jdk"`.
• Java version OpenJDK Runtime Environment (build 21.0.5+-13047016-b750.29)
• All Android licenses accepted.
[✓] Xcode - develop for iOS and macOS (Xcode 16.2) [2.7s]
• Xcode at /Applications/Xcode.app/Contents/Developer
• Build 16C5032a
• CocoaPods version 1.16.2
[✓] Chrome - develop for the web [12ms]
• Chrome at /Applications/Google Chrome.app/Contents/MacOS/Google Chrome
[✓] Android Studio (version 2024.3) [11ms]
• Android Studio at /Applications/Android Studio.app/Contents
• 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 21.0.5+-13047016-b750.29)
[✓] VS Code (version 1.100.3) [10ms]
• VS Code at /Applications/Visual Studio Code.app/Contents
• Flutter extension version 3.112.0
[✓] Connected device (4 available) [13.3s]
• iPhone 16 Pro Max (mobile) • A640AB5F-F030-4C86-B622-7A278C070CC9 •
ios • com.apple.CoreSimulator.SimRuntime.iOS-18-3 (simulator)
• macOS (desktop) • macos •
darwin-arm64 • macOS 15.4 24E248 darwin-arm64
• Chrome (web) • chrome •
web-javascript • Google Chrome 137.0.7151.70
! Error: Browsing on the local area network for iPhone. Ensure the device is
unlocked and attached with a cable or associated with the same local area
network as this Mac.
The device must be opted into Developer Mode to connect wirelessly. (code
-27)
[✓] Network resources [6.8s]
• 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 frameworkEntering text in a text field or keyboard related problemsFound to occur in 3.32Found to occur in 3.33flutter/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 Text Input teamTriaged by Text Input team