Hello all, just tried to reproduce the crash in a buster amd64 VM.
(gdb) bt #0 0x00007eff267b4f15 in QRegion::operator+= (this=0x5566b805ab60, r=...) at painting/qregion.cpp:4183 #1 0x00007eff265451a4 in QPaintDeviceWindow::update (this=this@entry=0x5566b8072600, rect=...) at kernel/qpaintdevicewindow.cpp:90 #2 0x00007eff2654522d in QPaintDeviceWindow::update (this=this@entry=0x5566b8072600) at ../../include/QtCore/../../src/corelib/tools/qsize.h:134 #3 0x00007eff159f9d38 in deepin_platform_plugin::DFrameWindow::updateMask() () at dframewindow.cpp:954 #4 0x00007eff159fc28e in deepin_platform_plugin::DFrameWindow::updateContentMarginsHint() () at dframewindow.cpp:901 #5 0x00007eff159fcb54 in deepin_platform_plugin::DFrameWindow::DFrameWindow(QWindow*) () at dframewindow.cpp:143 #6 0x00007eff15a0486c in deepin_platform_plugin::DPlatformWindowHelper::DPlatformWindowHelper(QXcbWindow*) () at dplatformwindowhelper.cpp:60 #7 0x00007eff159f47dc in deepin_platform_plugin::DPlatformIntegration::createPlatformWindow(QWindow*) const () at dplatformintegration.cpp:218 #8 0x00007eff2651e425 in QWindowPrivate::create (this=0x5566b84715e0, recursive=<optimized out>, nativeHandle=0) at kernel/qwindow.cpp:515 #9 0x00007eff26c2ebbd in QWidgetPrivate::create_sys(unsigned long long, bool, bool) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5 #10 0x00007eff26c2f1fd in QWidget::create(unsigned long long, bool, bool) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5 #11 0x00007eff26c3c243 in QWidget::setVisible(bool) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5 #12 0x00005566b6ef8e07 in MusicApp::show (this=this@entry=0x5566b830fa00) at musicapp.cpp:220 #13 0x00005566b6ef9103 in MusicApp::init (this=0x5566b830fa00) at musicapp.cpp:252 #14 0x00005566b6e865e5 in main (argc=<optimized out>, argv=<optimized out>) at main.cpp:129 Running with a local rebuilt package deepin-qt5dxcb-plugin the crash does not happen. Looks like there is currently an attempt to rebuild this package in the archive (1.1.11-1+b1) going on, but that seems to have not yet succeeded. [1] This FTBFS bug [2] against Qt 5.11.1 in experimental is maybe related to the rebuild attempt. Kind regards, Bernhard [1] https://buildd.debian.org/status/package.php?p=deepin-qt5dxcb-plugin [2] https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=903235
