Bug 428953

Application: kwin_x11 (5.17.5)

Qt Version: 5.15.1
Frameworks Version: 5.74.0
Operating System: Linux 5.9.0-1-amd64 x86_64
Distribution: Debian GNU/Linux bullseye/sid

-- Information about the crash:
<请详细告诉我们程序崩溃时您正在做什么。>

The crash can be reproduced every time.

-- Backtrace:
Application: KWin (kwin_x11), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f45b62778c0 (LWP 2037))]

Thread 3 (Thread 0x7f45b4a37700 (LWP 2041)):
#0  0x00007ffd7c341a7d in clock_gettime ()
#1  0x00007f45bde52aa1 in __GI___clock_gettime (clock_id=1, tp=0x7f45b4a36b00) at ../sysdeps/unix/sysv/linux/clock_gettime.c:38
#2  0x00007f45bc923021 in  () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#3  0x00007f45bc9218f9 in QTimerInfoList::updateCurrentTime() () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f45bc921ed5 in QTimerInfoList::timerWait(timespec&) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f45bc921024 in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f45bc8cab7b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f45bc6eb9be in QThread::exec() () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f45bac2ba27 in  () at /lib/x86_64-linux-gnu/libQt5DBus.so.5
#9  0x00007f45bc6ecb01 in  () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#10 0x00007f45bbb0aea7 in start_thread (arg=<optimized out>) at pthread_create.c:477
#11 0x00007f45bde8ad4f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 2 (Thread 0x7f45b5877700 (LWP 2040)):
#0  0x00007f45bde8035f in __GI___poll (fds=0x7f45b5876be8, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f45bc602d02 in  () at /lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007f45bc60498a in xcb_wait_for_event () at /lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007f45b5b94260 in  () at /lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#4  0x00007f45bc6ecb01 in  () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f45bbb0aea7 in start_thread (arg=<optimized out>) at pthread_create.c:477
#6  0x00007f45bde8ad4f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 1 (Thread 0x7f45b62778c0 (LWP 2037)):
[KCrash Handler]
#4  0x00007f45bc76def0 in QString::operator=(QString const&) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f45bdb9d10c in  () at /lib/x86_64-linux-gnu/libkwin.so.5
#6  0x00007f45ae812910 in  () at /usr/lib/x86_64-linux-gnu/qt5/plugins/org.kde.kdecoration2/breezedecoration.so
#7  0x00007f45ae8167f9 in  () at /usr/lib/x86_64-linux-gnu/qt5/plugins/org.kde.kdecoration2/breezedecoration.so
#8  0x00007f45ae816a28 in  () at /usr/lib/x86_64-linux-gnu/qt5/plugins/org.kde.kdecoration2/breezedecoration.so
#9  0x00007f45bdb9ed52 in KWin::Decoration::DecorationBridge::createDecoration(KWin::AbstractClient*) () at /lib/x86_64-linux-gnu/libkwin.so.5
#10 0x00007f45bdb734cc in KWin::Client::createDecoration(QRect const&) () at /lib/x86_64-linux-gnu/libkwin.so.5
#11 0x00007f45bdb77758 in KWin::Client::updateDecoration(bool, bool) () at /lib/x86_64-linux-gnu/libkwin.so.5
#12 0x00007f45bdc0b246 in KWin::Client::manage(unsigned int, bool) () at /lib/x86_64-linux-gnu/libkwin.so.5
#13 0x00007f45bdca79a5 in KWin::Workspace::createClient(unsigned int, bool) () at /lib/x86_64-linux-gnu/libkwin.so.5
#14 0x00007f45bdcaba1f in KWin::Workspace::initWithX11() () at /lib/x86_64-linux-gnu/libkwin.so.5
#15 0x00007f45bdcacd51 in KWin::Workspace::init() () at /lib/x86_64-linux-gnu/libkwin.so.5
#16 0x00007f45bdcad56d in KWin::Workspace::Workspace(QString const&) () at /lib/x86_64-linux-gnu/libkwin.so.5
#17 0x00007f45bdc08054 in KWin::Application::createWorkspace() () at /lib/x86_64-linux-gnu/libkwin.so.5
#18 0x00007f45bdf59e6c in  () at /lib/x86_64-linux-gnu/libkdeinit5_kwin_x11.so
#19 0x00007f45bc902796 in  () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#20 0x00007f45bdf5a2cc in  () at /lib/x86_64-linux-gnu/libkdeinit5_kwin_x11.so
#21 0x00007f45bc902796 in  () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#22 0x00007f45bd8e4633 in  () at /lib/x86_64-linux-gnu/libKF5WindowSystem.so.5
#23 0x00007f45bd8e4e65 in KSelectionOwner::filterEvent(void*) () at /lib/x86_64-linux-gnu/libKF5WindowSystem.so.5
#24 0x00007f45bc8c9707 in QAbstractEventDispatcher::filterNativeEvent(QByteArray const&, void*, long*) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#25 0x00007f45b5b71561 in QXcbConnection::handleXcbEvent(xcb_generic_event_t*) () at /lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#26 0x00007f45b5b72a76 in QXcbConnection::processXcbEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#27 0x00007f45b5b9560c in  () at /lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#28 0x00007f45bc8cab7b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#29 0x00007f45bc8d2df0 in QCoreApplication::exec() () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#30 0x00007f45bdf5b886 in kdemain () at /lib/x86_64-linux-gnu/libkdeinit5_kwin_x11.so
#31 0x00007f45bddb3cca in __libc_start_main (main=0x561f4527a050, argc=3, argv=0x7ffd7c2df728, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffd7c2df718) at ../csu/libc-start.c:308
#32 0x0000561f4527a08a in _start ()
[Inferior 1 (process 2037) detached]