crash on linux

Crash on linux when close sub window

• plugin: desktop_multi_window: 0.3.0

Reproduce Steps

Steps to reproduce the behavior:

0.35.0 (git 5c0ac3b) - Multimedia Development Kit. Copyright (c) 2016-2025 WangBin(QtAV author) <wbsecg1 at gmail.com>
Build for: ubuntu/22.04 6.5.0-18-generic 4KB x86_64; glibc2.24/2.35 libc++220000; Clang22.0.0 (++20251025081749+57828a6d5de0-1~exp1~20251025201905.1249); 02:38:58 Oct 29 2025. 
2025-10-29 20:11:28.475 [I] App started with arguments: []
2025-10-29 20:11:28.543 [I] Window arguments: WindowArguments(businessId: main, data: {})
2025-10-29 20:11:28.838 [I] Windows changed event received1
Syncing files to device Linux...                                    79ms

Flutter run key commands.
r Hot reload. 🔥🔥🔥
R Hot restart.
h List all available interactive commands.
d Detach (terminate "flutter run" but leave application running).
c Clear the screen
q Quit (terminate the application on the device).

A Dart VM Service on Linux is available at: http://127.0.0.1:44433/y1bSo6jHwBg=/
The Flutter DevTools debugger and profiler on Linux is available at: http://127.0.0.1:9101?uri=http://127.0.0.1:44433/y1bSo6jHwBg=/
2025-10-29 20:11:43.043 [I] Windows changed event received1
2025-10-29 20:11:43.044 [D] Created sample window: 9790ddfa-87e5-44d0-9bfb-0c0f535d8c78 {"businessId":"sample"}
2025-10-29 20:11:43.167 [I] App started with arguments: [multi_window, 9790ddfa-87e5-44d0-9bfb-0c0f535d8c78, {"businessId":"sample"}]
2025-10-29 20:11:43.226 [I] Window arguments: WindowArguments(businessId: sample, data: {})
desktop_multi_window_example: ../src/dispatch_common.c:872: epoxy_get_proc_address: Assertion `0 && "Couldn't find current GLX or EGL context.\n"' failed.
Lost connection to device.

Version (please complete the following information):

Doctor summary (to see all details, run flutter doctor -v):
[✓] Flutter (Channel stable, 3.35.7, on Ubuntu 22.04.4 LTS 6.5.0-18-generic, locale en_US.UTF-8)
[✗] Android toolchain - develop for Android devices
    ✗ Unable to locate Android SDK.
      Install Android Studio from: https://developer.android.com/studio/index.html
      On first launch it will assist you in installing the Android SDK components.
      (or visit https://flutter.dev/to/linux-android-setup for detailed instructions).
      If the Android SDK has been installed to a custom location, please use
      `flutter config --android-sdk` to update to that location.

[✗] Chrome - develop for the web (Cannot find Chrome executable at google-chrome)
    ! Cannot find Chrome. Try setting CHROME_EXECUTABLE to a Chrome executable.
[✓] Linux toolchain - develop for Linux desktop
[!] Android Studio (not installed)
[✓] Connected device (1 available)
[✓] Network resources

! Doctor found issues in 3 categories.

Reproduce the Linux crash with desktop_multi_window 0.3.0 using the provided example, then inspect src/dispatch_common.c around line 872, where the GLX/EGL assertion is reported. Trace what happens when the subwindow closes and verify that this action no longer aborts the application.