Minimising a window causes a crash

[digit81]

On Linux Mint 19.3 (based on Ubuntu 18.04 LTS).

[xcb] Unknown sequence number while processing reply
[xcb] Most likely this is a multi-threaded client and XInitThreads has not been called
[xcb] Aborting, sorry about that.
flutter_folio: ../../src/xcb_io.c:639: _XReply: Warunek zapewnienia `!xcb_xlib_threads_sequence_lost' nie został spełniony.
Lost connection to device.

flutter doctor -v

[✓] Flutter (Channel dev, 2.1.0-12.1.pre, on Linux, locale pl_PL.UTF-8) • Flutter version 2.1.0-12.1.pre at /home/dgr/development/flutter • Framework revision 8264cb3e8a (2 weeks ago), 2021-03-10 12:37:57 -0800 • Engine revision 711ab3fda0 • Dart version 2.13.0 (build 2.13.0-116.0.dev)

[✓] Android toolchain - develop for Android devices (Android SDK version 30.0.3)
• Android SDK at /home/dgr/Android/Sdk
• Platform android-30, build-tools 30.0.3
• ANDROID_HOME = /home/dgr/Android/Sdk
• Java binary at: /home/dgr/.local/share/JetBrains/Toolbox/apps/AndroidStudio/ch-0/201.7199119/jre/bin/java
• Java version OpenJDK Runtime Environment (build 1.8.0_242-release-1644-b3-6222593)
• All Android licenses accepted.

[✓] Linux toolchain - develop for Linux desktop
• clang version 6.0.0-1ubuntu2 (tags/RELEASE_600/final)
• cmake version 3.10.2
• ninja version 1.8.2
• pkg-config version 0.29.1

[✓] Android Studio (version 4.1)
• Android Studio at /home/dgr/.local/share/JetBrains/Toolbox/apps/AndroidStudio/ch-0/201.7199119
• Flutter plugin version 54.1.1
• Dart plugin version 201.9335
• Java version OpenJDK Runtime Environment (build 1.8.0_242-release-1644-b3-6222593)

[✓] Connected device (1 available)
• Linux (desktop) • linux • linux-x64 • Linux

• No issues found!

Please notice old cmake and ninja - maybe this is an issue.