[iOS] StateError painting.dart in Path.combine in _RenderCupertinoTextSelectionToolbarShape #110076
Description
Hi, I'm faced with an Exception that was reported in Sentry and I'm not sure what could be the cause, how to fix it, or reproduce it.
This issue is related to text selection on iOS. It is rare and affects a few users, but generates a lot of errors coz this is probably a UI bug and it throws an error every time the screen repaints.
It started a year ago when flutter was updated to the 2nd version and does not depends on the device model or ios version.
I tried to enable some accessibility settings (bold text, high contrast, zoom) but had no luck in reproducing it.
I think, this is a Flutter issue, but I have not found any similar threads in the Flutter repo and have no steps to reproduce.
In this screen, I'm using SelectableText widget and TextField, but I'm not sure, which could throw this error,
Issue caused file is text_selection.dart from Cupertino library.
Class is _RenderCupertinoTextSelectionToolbarShape
Method _clipPath, Path.combine call, line 284.
Logs
Error and stack trace:
StateError: Bad state: Path.combine() failed. This may be due an invalid path; in particular, check for NaN values.
File "painting.dart", line 2616, in Path.combine
File "text_selection_toolbar.dart", line 284, in _RenderCupertinoTextSelectionToolbarShape._clipPath
File "text_selection_toolbar.dart", line 298, in _RenderCupertinoTextSelectionToolbarShape.paint
File "object.dart", line 2449, in RenderObject._paintWithContext
File "object.dart", line 141, in PaintingContext._repaintCompositedChild
File "object.dart", line 100, in PaintingContext.repaintCompositedChild
File "object.dart", line 995, in PipelineOwner.flushPaint
File "binding.dart", line 499, in RendererBinding.drawFrame
File "binding.dart", line 883, in WidgetsBinding.drawFrame
File "binding.dart", line 363, in RendererBinding._handlePersistentFrameCallback
File "binding.dart", line 1144, in SchedulerBinding._invokeFrameCallback
File "binding.dart", line 1081, in SchedulerBinding.handleDrawFrame
File "binding.dart", line 995, in SchedulerBinding._handleDrawFrame
File "zone.dart", line 1426, in _rootRun
File "zone.dart", line 1328, in _CustomZone.run
File "zone.dart", line 1236, in _CustomZone.runGuarded
File "hooks.dart", line 151, in _invoke
File "platform_dispatcher.dart", line 308, in PlatformDispatcher._drawFrame
File "hooks.dart", line 115, in _drawFrame
Flutter doctor output:
Doctor summary (to see all details, run flutter doctor -v):
[✓] Flutter (Channel stable, 3.0.5, on macOS 12.5.1 21G83 darwin-arm, locale en-GB)
[✓] Android toolchain - develop for Android devices (Android SDK version 31.0.0)
[✓] Xcode - develop for iOS and macOS (Xcode 13.4.1)
[✓] Chrome - develop for the web
[✓] Android Studio (version 2021.2)
[✓] VS Code (version 1.70.2)
[✓] Connected device (2 available)
[✓] HTTP Host Availability
I would appreciate any help with it, tips, or suggestion on how it could be reproduced or fixed.