[Linux] Pressing Alt-Tab without moving the mouse after startup breaks mouse movement afterwards #90838
Description
Reproduction code:
import 'package:flutter/material.dart';
class HomePage extends StatefulWidget {
@override
_HomePageState createState() => _HomePageState();
}
class _HomePageState extends State<HomePage> {
@override
Widget build(BuildContext context) {
return Scaffold(
body: Center(
child: TextField(),
),
);
}
}Reproduction step:
flutter run -d linux- Alt-Tab to the app, if needed, without moving the mouse at all
- Alt-Tab to other apps
Expected result: The app is still usable.
Actual result: The app keeps informing assertion for the mouse system and does not respond to mouse interactions. The first of the errors is:
[ERROR:flutter/lib/ui/ui_dart_state.cc(209)] Unhandled Exception: 'package:flutter/src/rendering/mouse_tracker.dart': Failed assertion: line 317 pos 18: 'event is! PointerRemovedEvent': is not true.
#0 _AssertionError._doThrowNew (dart:core-patch/errors_patch.dart:47:61)
#1 _AssertionError._throwNew (dart:core-patch/errors_patch.dart:36:5)
#2 MouseTracker.updateWithEvent.<anonymous closure>.<anonymous closure> (package:flutter/src/rendering/mouse_tracker.dart:317:18)
#3 MouseTracker._deviceUpdatePhase (package:flutter/src/rendering/mouse_tracker.dart:206:9)
#4 MouseTracker.updateWithEvent.<anonymous closure> (package:flutter/src/rendering/mouse_tracker.dart:312:7)
#5 MouseTracker._monitorMouseConnection (package:flutter/src/rendering/mouse_tracker.dart:190:9)
#6 MouseTracker.updateWithEvent (package:flutter/src/rendering/mouse_tracker.dart:311:5)
#7 RendererBinding.dispatchEvent (package:flutter/src/rendering/binding.dart:270:20)
#8 GestureBinding._handlePointerEventImmediately (package:flutter/src/gestures/binding.dart:374:7)
#9 GestureBinding.handlePointerEvent (package:flutter/src/gestures/binding.dart:338:5)
#10 GestureBinding._flushPointerEventQueue (package:flutter/src/gestures/binding.dart:296:7)
#11 GestureBinding._handlePointerDataPacket (package:flutter/src/gestures/binding.dart:279:7)
#12 _rootRunUnary (dart:async/zone.dart:1444:13)
#13 _CustomZone.runUnary (dart:async/zone.dart:1335:19)
#14 _CustomZone.runUnaryGuarded (dart:async/zone.dart:1244:7)
#15 _invoke1 (dart:ui/hooks.dart:185:10)
#16 PlatformDispatcher._dispatchPointerDataPacket (dart:ui/platform_dispatcher.dart:293:7)
#17 _dispatchPointerDataPacket (dart:ui/hooks.dart:98:31)
Version:
flutter doctor -v ✔ 10102 16:00:08
[✓] Flutter (Channel master, 2.6.0-12.0.pre.64, on Debian GNU/Linux rodete 5.10.46-4rodete4-amd64, locale
en_US.UTF-8)
• Flutter version 2.6.0-12.0.pre.64 at /usr/local/google/home/tongmu/dev/flutter
• Upstream repository [email protected]:flutter/flutter.git
• Framework revision 975da38dd3 (4 days ago), 2021-09-23 14:13:04 -0400
• Engine revision a3911f24a5
• Dart version 2.15.0 (build 2.15.0-140.0.dev)
[!] Android toolchain - develop for Android devices (Android SDK version 29.0.0)
• Android SDK at /usr/local/google/home/tongmu/Android/Sdk
✗ cmdline-tools component is missing
Run `path/to/sdkmanager --install "cmdline-tools;latest"`
See https://developer.android.com/studio/command-line for more details.
✗ Android license status unknown.
Run `flutter doctor --android-licenses` to accept the SDK licenses.
See https://flutter.dev/docs/get-started/install/linux#android-setup for more details.
[✓] Chrome - develop for the web
• Chrome at google-chrome
[✓] Linux toolchain - develop for Linux desktop
• Debian clang version 11.0.1-2
• cmake version 3.18.4
• ninja version 1.8.2
• pkg-config version 0.29.2
[✓] Android Studio (version 3.5)
• Android Studio at /usr/local/google/home/tongmu/src/android-studio
• Flutter plugin version 43.0.1
• Dart plugin version 191.8593
• Java version OpenJDK Runtime Environment (build 1.8.0_202-release-1483-b49-5587405)
[✓] VS Code (version 1.60.0)
• VS Code at /usr/share/code
• Flutter extension version 3.26.0
[✓] Connected device (2 available)
• Linux (desktop) • linux • linux-x64 • Debian GNU/Linux rodete 5.10.46-4rodete4-amd64
• Chrome (web) • chrome • web-javascript • Google Chrome 94.0.4606.61
! Doctor found issues in 1 category.