[linux, engine]: can't reuse event channel with same name on Linux #126209
Description
Is there an existing issue for this?
- I have searched the existing issues
- I have read the guide to filing a bug
Steps to reproduce
- Checkout repository: https://github.com/bluefireteam/audioplayers/blob/fbc658d2f69d581d2ca15c81c535047263fbfdf2
- Execute environmental setup with melos to get reference to the current platform interface.
- Execute this test:
flutter test --name "Reuse same platform event channel(\s*\(variant: .*\))?$" -d linux integration_test/lib_test.dart
Expected results
It should not fail.
The main question is: "Should platform channels with the same name be reusable". It's hard to write platform channel tests for our lib, as each test should be executeable independently. But that's not possible for the native side. As it always involves some initialization and deserialization / disposing, which lives in the same process for the whole test execution. Therefor it should be possible to use the exact same name for a previously disposed event channel.
Actual results
MissingPluginException(No implementation found for method listen on channel xyz.luan/audioplayers/events/somePlayerId)
If I explicitely remove the channel from the binary messenger, the tests pass:
fl_binary_messenger_set_message_handler_on_channel(
binaryMessenger, ("xyz.luan/audioplayers/events/" + playerId).c_str(), nullptr, nullptr, nullptr);
But this should be done via g_clear_object already.
Also see: flutter/engine#21316 (comment)
Code sample
Code sample
It's not minimal, but it is not really necessary / hard to setup, as it involves platform channels.
https://github.com/bluefireteam/audioplayers/blob/fbc658d2f69d581d2ca15c81c535047263fbfdf2
Screenshots or Video
Screenshots / Video demonstration
[Upload media here]
Logs
Logs
══╡ EXCEPTION CAUGHT BY SERVICES LIBRARY ╞══════════════════════════════════════════════════════════
The following MissingPluginException was thrown while activating platform stream on channel
xyz.luan/audioplayers/events/somePlayerId:
MissingPluginException(No implementation found for method listen on channel
xyz.luan/audioplayers/events/somePlayerId)
When the exception was thrown, this was the stack:
#0 MethodChannel._invokeMethod (package:flutter/src/services/platform_channel.dart:313:7)
<asynchronous suspension>
<asynchronous suspension>
(elided one frame from package:stack_trace)
════════════════════════════════════════════════════════════════════════════════════════════════════
══╡ EXCEPTION CAUGHT BY SERVICES LIBRARY ╞══════════════════════════════════════════════════════════
The following MissingPluginException was thrown while de-activating platform stream on channel
xyz.luan/audioplayers/events/somePlayerId:
MissingPluginException(No implementation found for method cancel on channel
xyz.luan/audioplayers/events/somePlayerId)
When the exception was thrown, this was the stack:
#0 MethodChannel._invokeMethod (package:flutter/src/services/platform_channel.dart:313:7)
<asynchronous suspension>
<asynchronous suspension>
(elided one frame from package:stack_trace)
════════════════════════════════════════════════════════════════════════════════════════════════════
══╡ EXCEPTION CAUGHT BY FLUTTER TEST FRAMEWORK ╞════════════════════════════════════════════════════
The following message was thrown:
Multiple exceptions (2) were detected during the running of the current test, and at least one was
unexpected.
════════════════════════════════════════════════════════════════════════════════════════════════════
Test failed. See exception logs above.
The test description was: Reuse same platform event channel idFlutter Doctor output
Doctor output
[✓] Flutter (Channel stable, 3.7.0, on Ubuntu 22.04.2 LTS 5.15.0-71-generic, locale en_US.UTF-8)
• Flutter version 3.7.0 on channel stable at /opt/flutter
• Upstream repository https://github.com/flutter/flutter.git
• Framework revision b06b8b2710 (3 months ago), 2023-01-23 16:55:55 -0800
• Engine revision b24591ed32
• Dart version 2.19.0
• DevTools version 2.20.1
[✓] Android toolchain - develop for Android devices (Android SDK version 33.0.0)
• Android SDK at /home/gustl/Android/Sdk
• Platform android-33, build-tools 33.0.0
• ANDROID_SDK_ROOT = /home/gustl/Android/Sdk
• Java binary at: /usr/bin/java
• Java version OpenJDK Runtime Environment (build 17.0.6+10-Ubuntu-0ubuntu122.04)
• All Android licenses accepted.
[✓] Chrome - develop for the web
• Chrome at google-chrome
[✓] 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 (not installed)
• Android Studio not found; download from https://developer.android.com/studio/index.html
(or visit https://flutter.dev/docs/get-started/install/linux#android-setup for detailed instructions).
[✓] IntelliJ IDEA Ultimate Edition (version 2023.1)
• IntelliJ at /snap/intellij-idea-ultimate/426
• Flutter plugin version 73.0.4
• Dart plugin can be installed from:
🔨 https://plugins.jetbrains.com/plugin/6351-dart
[✓] Connected device (2 available)
• Linux (desktop) • linux • linux-x64 • Ubuntu 22.04.2 LTS 5.15.0-71-generic
• Chrome (web) • chrome • web-javascript • Google Chrome 112.0.5615.121
[✓] HTTP Host Availability
• All required HTTP hosts are available
! Doctor found issues in 1 category.
Also see: flutter/engine#21316 (comment)