[Linux] screen reader often stops working for Flutter apps #101513
Description
Steps to Reproduce
- Execute
flutter create -t skeleton foo - Run the Orca screen reader
a. Executetail -F orca.login one xterm
b. Executeorca -r --debug-file=orca.login another xterm - Execute
flutter run - Tab-navigate around the UI
- Restart the app if Orca reads out widgets
- Repeat steps 3-5 (until Orca stops reading the Flutter widgets)
Expected results:
Orca continues to work regardless of restarting the Flutter app.
Actual results:
Orca eventually stops working. According to orca.log the accessibility node tree breaks. You should see events similar to this:
vvvvv PROCESS OBJECT EVENT object:state-changed:focused vvvvv
15:41:10.882466 - OBJECT EVENT: object:state-changed:focused (1, 0, 0)
app.name='a11y_bug' name='' role='push button'
description=''
states='enabled focusable focused showing visible'
relations=''
interfaces='Accessible Action Collection Component Text'
attributes=''
path=[-1, 0, 0, 0, 0, -1, -1, -1, -1]
15:41:10.883095 - EVENT MANAGER: Getting script for [application | a11y_bug] (check: True)
15:41:10.885399 - EVENT MANAGER: Script is <orca.scripts.toolkits.gtk.script.Script object at 0x7f867d3e5a50>
15:41:10.885450 - EVENT MANAGER: Change active script: False (The script for this event is already active.)
15:41:10.887025 - INFO: Looking at [frame | a11y_bug] from [application | a11y_bug] /home/jpnurmi/Temp/a11y_bug/build/linux/x64/debug/bundle/a11y_bug
15:41:10.887099 - INFO: [frame | a11y_bug] can be active window
15:41:10.887121 - ORCA: Active script is: <orca.scripts.toolkits.gtk.script.Script object at 0x7f867d3e5a50>
15:41:10.887200 - ZOMBIE: [push button | ]'s index is -1
15:41:10.887241 - ERROR: New locusOfFocus ([push button | ]) is zombie. Not updating.
15:41:10.887288 - EVENT MANAGER: locusOfFocus: [panel | ] activeScript: <orca.scripts.toolkits.gtk.script.Script object at 0x7f867d3e5a50>
TOTAL PROCESSING TIME: 0.0048
^^^^^ PROCESS OBJECT EVENT object:state-changed:focused ^^^^^
Code sample
Logs
[✓] Flutter (Channel master, 2.13.0-0.0.pre.424, on Ubuntu Jammy Jellyfish (development branch) 5.15.0-25-generic, locale en_US.UTF-8)
• Flutter version 2.13.0-0.0.pre.424 at /home/jpnurmi/Flutter
• Upstream repository https://github.com/flutter/flutter.git
• Framework revision 31668eef40 (7 hours ago), 2022-04-07 09:51:08 +0300
• Engine revision 541b636563
• Dart version 2.17.0 (build 2.17.0-266.0.dev)
• DevTools version 2.12.1
[✓] Android toolchain - develop for Android devices (Android SDK version 31.0.0)
• Android SDK at /home/jpnurmi/Android/Sdk
• Platform android-31, build-tools 31.0.0
• ANDROID_SDK_ROOT = /home/jpnurmi/Android/Sdk
• Java binary at: /home/jpnurmi/Android/android-studio/jre/bin/java
• Java version OpenJDK Runtime Environment (build 11.0.10+0-b96-7249189)
• All Android licenses accepted.
[✓] Linux toolchain - develop for Linux desktop
• Ubuntu clang version 14.0.0-1ubuntu1
• cmake version 3.22.1
• ninja version 1.10.1
• pkg-config version 0.29.2
[✓] Android Studio (version 2020.3)
• Android Studio at /home/jpnurmi/Android/android-studio
• 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 11.0.10+0-b96-7249189)
[✓] VS Code
• VS Code at /snap/code/current
• Flutter extension version 3.38.1
[✓] Connected device (1 available)
• Linux (desktop) • linux • linux-x64 • Ubuntu Jammy Jellyfish (development branch) 5.15.0-25-generic
[✓] HTTP Host Availability
• All required HTTP hosts are available
• No issues found!