TextField crashes on two-finger selection gesture #168578
Description
Steps to reproduce
- Have a TextField. Enter text into the text field
- Make a selection
- Move the two edit handles independently with two fingers, then release
Exception:
══╡ EXCEPTION CAUGHT BY GESTURE ╞═══════════════════════════════════════════════════════════════════
The following assertion was thrown while handling a gesture:
'package:flutter/src/widgets/text_selection.dart': Failed assertion: line 759 pos 12:
'_dragStartSelection != null': is not true.
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
When the exception was thrown, this was the stack:
#2 TextSelectionOverlay._handleSelectionEndHandleDragUpdate (package:flutter/src/widgets/text_selection.dart:759:12)
#3 SelectionOverlay._handleEndHandleDragUpdate (package:flutter/src/widgets/text_selection.dart:1270:28)
#4 DragGestureRecognizer._checkUpdate.<anonymous closure> (package:flutter/src/gestures/monodrag.dart:868:55)
#5 GestureRecognizer.invokeCallback (package:flutter/src/gestures/recognizer.dart:345:24)
#6 DragGestureRecognizer._checkUpdate (package:flutter/src/gestures/monodrag.dart:868:7)
#7 DragGestureRecognizer.handleEvent (package:flutter/src/gestures/monodrag.dart:714:11)
#8 PointerRouter._dispatch (package:flutter/src/gestures/pointer_router.dart:97:12)
#9 PointerRouter._dispatchEventToRoutes.<anonymous closure> (package:flutter/src/gestures/pointer_router.dart:143:9)
#10 _LinkedHashMapMixin.forEach (dart:_compact_hash:764:13)
#11 PointerRouter._dispatchEventToRoutes (package:flutter/src/gestures/pointer_router.dart:141:18)
#12 PointerRouter.route (package:flutter/src/gestures/pointer_router.dart:131:7)
#13 GestureBinding.handleEvent (package:flutter/src/gestures/binding.dart:530:19)
#14 GestureBinding.dispatchEvent (package:flutter/src/gestures/binding.dart:499:22)
#15 RendererBinding.dispatchEvent (package:flutter/src/rendering/binding.dart:473:11)
#16 GestureBinding._handlePointerEventImmediately (package:flutter/src/gestures/binding.dart:437:7)
#17 GestureBinding.handlePointerEvent (package:flutter/src/gestures/binding.dart:394:5)
#18 GestureBinding._flushPointerEventQueue (package:flutter/src/gestures/binding.dart:341:7)
#19 GestureBinding._handlePointerDataPacket (package:flutter/src/gestures/binding.dart:308:9)
#20 _invoke1 (dart:ui/hooks.dart:347:13)
#21 PlatformDispatcher._dispatchPointerDataPacket (dart:ui/platform_dispatcher.dart:467:7)
#22 _dispatchPointerDataPacket (dart:ui/hooks.dart:282:31)
(elided 2 frames from class _AssertionError)
Handler: "onUpdate"
Recognizer:
PanGestureRecognizer#8943a
════════════════════════════════════════════════════════════════════════════════════════════════════
Observed on Android and iOS.
Expected results
Selection updates without exception
Actual results
Crash, seen above
Code sample
Code sample
Widget build(BuildContext context) {
return Scaffold(
body: Center(child: TextField()),
);
}Screenshots or Video
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Logs
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[Paste your logs here]Flutter Doctor output
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[✓] Flutter (Channel google3, on macOS 14.7.5 23H527 darwin-arm64 (Rosetta), locale en-US) [2.6s]
• Framework revision b9e982614b (14 days ago), 2025-04-24T00:00:00.000
• Engine revision b9e982614b
• Dart version 88e2c816beRest of output contains proprietary information
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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 problemsIt was better in the past than it is nowVarious Google teamsSelectableRegion, SelectionArea, SelectionContainer, Selectable, and related APIsFound to occur in 3.29Found to occur in 3.32flutter/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