Application: kwin_x11 (5.18.4)

Qt Version: 5.14.2
Frameworks Version: 5.69.0
Operating System: Linux 5.6.4-arch1-1 x86_64
Windowing system: X11
Distribution: "Arch Linux"

-- Information about the crash:
- What I was doing when the application crashed:

I launched the game (DmC Devil May Cry, a DX9 game running with Valve Proton (and VK3D/DXVK idk)), alt-tabbed back out, replied to someone on Discord, tried to switch back and, after multiple tried back and forth, kwin_x11 crashed. I noticed the cursor being inverted while the game was supposed to be on foreground, however this could be caused by the game itself

-- Backtrace:
Application: KWin (kwin_x11), signal: Segmentation fault
Using host libthread_db library "/usr/lib/libthread_db.so.1".
[Current thread is 1 (Thread 0x7faf6f3c8840 (LWP 561))]

Thread 10 (Thread 0x7faeb2ac1700 (LWP 3046)):
#0  0x00007faf7704cbb6 in ppoll () at /usr/lib/libc.so.6
#1  0x00007faf759db7eb in qt_safe_poll(pollfd*, unsigned long, timespec const*) () at /usr/lib/libQt5Core.so.5
#2  0x00007faf759dcead in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#3  0x00007faf7598605c in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#4  0x00007faf757aac62 in QThread::exec() () at /usr/lib/libQt5Core.so.5
#5  0x00007faf740bc389 in  () at /usr/lib/libQt5Qml.so.5
#6  0x00007faf757abdd6 in  () at /usr/lib/libQt5Core.so.5
#7  0x00007faf7497246f in start_thread () at /usr/lib/libpthread.so.0
#8  0x00007faf770573d3 in clone () at /usr/lib/libc.so.6

Thread 9 (Thread 0x7faec162e700 (LWP 3034)):
#0  0x00007faf7497901a in pthread_cond_timedwait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007faf757b1a48 in QWaitCondition::wait(QMutex*, QDeadlineTimer) () at /usr/lib/libQt5Core.so.5
#2  0x00007faf757b1b69 in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib/libQt5Core.so.5
#3  0x00007faf757af1dd in  () at /usr/lib/libQt5Core.so.5
#4  0x00007faf757abdd6 in  () at /usr/lib/libQt5Core.so.5
#5  0x00007faf7497246f in start_thread () at /usr/lib/libpthread.so.0
#6  0x00007faf770573d3 in clone () at /usr/lib/libc.so.6

Thread 8 (Thread 0x7faec214c700 (LWP 3033)):
#0  0x00007faf7497901a in pthread_cond_timedwait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007faf757b1a48 in QWaitCondition::wait(QMutex*, QDeadlineTimer) () at /usr/lib/libQt5Core.so.5
#2  0x00007faf757b1b69 in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib/libQt5Core.so.5
#3  0x00007faf757af1dd in  () at /usr/lib/libQt5Core.so.5
#4  0x00007faf757abdd6 in  () at /usr/lib/libQt5Core.so.5
#5  0x00007faf7497246f in start_thread () at /usr/lib/libpthread.so.0
#6  0x00007faf770573d3 in clone () at /usr/lib/libc.so.6

Thread 7 (Thread 0x7faebb030700 (LWP 3021)):
#0  0x00007faf7704cbb6 in ppoll () at /usr/lib/libc.so.6
#1  0x00007faf759db7eb in qt_safe_poll(pollfd*, unsigned long, timespec const*) () at /usr/lib/libQt5Core.so.5
#2  0x00007faf759dcead in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#3  0x00007faf7598605c in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#4  0x00007faf757aac62 in QThread::exec() () at /usr/lib/libQt5Core.so.5
#5  0x00007faf757abdd6 in  () at /usr/lib/libQt5Core.so.5
#6  0x00007faf7497246f in start_thread () at /usr/lib/libpthread.so.0
#7  0x00007faf770573d3 in clone () at /usr/lib/libc.so.6

Thread 6 (Thread 0x7faf65203700 (LWP 1534)):
#0  0x00007faf74978cf5 in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007faf757b1ac4 in QWaitCondition::wait(QMutex*, QDeadlineTimer) () at /usr/lib/libQt5Core.so.5
#2  0x00007faf757b1ba2 in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib/libQt5Core.so.5
#3  0x00007faf744215cb in  () at /usr/lib/libQt5Quick.so.5
#4  0x00007faf7442185b in  () at /usr/lib/libQt5Quick.so.5
#5  0x00007faf757abdd6 in  () at /usr/lib/libQt5Core.so.5
#6  0x00007faf7497246f in start_thread () at /usr/lib/libpthread.so.0
#7  0x00007faf770573d3 in clone () at /usr/lib/libc.so.6

Thread 5 (Thread 0x7faf67fff700 (LWP 926)):
#0  0x00007faf7704cbb6 in ppoll () at /usr/lib/libc.so.6
#1  0x00007faf759db7eb in qt_safe_poll(pollfd*, unsigned long, timespec const*) () at /usr/lib/libQt5Core.so.5
#2  0x00007faf759dcead in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#3  0x00007faf7598605c in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#4  0x00007faf757aac62 in QThread::exec() () at /usr/lib/libQt5Core.so.5
#5  0x00007faf740bc389 in  () at /usr/lib/libQt5Qml.so.5
#6  0x00007faf757abdd6 in  () at /usr/lib/libQt5Core.so.5
#7  0x00007faf7497246f in start_thread () at /usr/lib/libpthread.so.0
#8  0x00007faf770573d3 in clone () at /usr/lib/libc.so.6

Thread 4 (Thread 0x7faf667bd700 (LWP 770)):
#0  0x00007faf74978cf5 in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007faf752a8c4c in  () at /usr/lib/libQt5Script.so.5
#2  0x00007faf752a8c69 in  () at /usr/lib/libQt5Script.so.5
#3  0x00007faf7497246f in start_thread () at /usr/lib/libpthread.so.0
#4  0x00007faf770573d3 in clone () at /usr/lib/libc.so.6

Thread 3 (Thread 0x7faf677fe700 (LWP 722)):
#0  0x00007faf7704cbb6 in ppoll () at /usr/lib/libc.so.6
#1  0x00007faf759db7eb in qt_safe_poll(pollfd*, unsigned long, timespec const*) () at /usr/lib/libQt5Core.so.5
#2  0x00007faf759dcead in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#3  0x00007faf7598605c in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#4  0x00007faf757aac62 in QThread::exec() () at /usr/lib/libQt5Core.so.5
#5  0x00007faf740bc389 in  () at /usr/lib/libQt5Qml.so.5
#6  0x00007faf757abdd6 in  () at /usr/lib/libQt5Core.so.5
#7  0x00007faf7497246f in start_thread () at /usr/lib/libpthread.so.0
#8  0x00007faf770573d3 in clone () at /usr/lib/libc.so.6

Thread 2 (Thread 0x7faf6d887700 (LWP 646)):
#0  0x00007faf7704cbb6 in ppoll () at /usr/lib/libc.so.6
#1  0x00007faf759db7eb in qt_safe_poll(pollfd*, unsigned long, timespec const*) () at /usr/lib/libQt5Core.so.5
#2  0x00007faf759dcead in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#3  0x00007faf7598605c in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#4  0x00007faf757aac62 in QThread::exec() () at /usr/lib/libQt5Core.so.5
#5  0x00007faf76a83b28 in  () at /usr/lib/libQt5DBus.so.5
#6  0x00007faf757abdd6 in  () at /usr/lib/libQt5Core.so.5
#7  0x00007faf7497246f in start_thread () at /usr/lib/libpthread.so.0
#8  0x00007faf770573d3 in clone () at /usr/lib/libc.so.6

Thread 1 (Thread 0x7faf6f3c8840 (LWP 561)):
[KCrash Handler]
#6  0x00005607b7c6c710 in  ()
#7  0x00007faf76d4c482 in KWin::Workspace::workspaceEvent(xcb_generic_event_t*) () at /usr/lib/libkwin.so.5
#8  0x00007faf75984a37 in QAbstractEventDispatcher::filterNativeEvent(QByteArray const&, void*, long*) () at /usr/lib/libQt5Core.so.5
#9  0x00007faf6ef2faa3 in QXcbConnection::handleXcbEvent(xcb_generic_event_t*) () at /usr/lib/libQt5XcbQpa.so.5
#10 0x00007faf6ef30829 in QXcbConnection::processXcbEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5XcbQpa.so.5
#11 0x00007faf6ef5a1ee in  () at /usr/lib/libQt5XcbQpa.so.5
#12 0x00007faf7598605c in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#13 0x00007faf7598e066 in QCoreApplication::exec() () at /usr/lib/libQt5Core.so.5
#14 0x00007faf77126379 in kdemain () at /usr/lib/libkdeinit5_kwin_x11.so
#15 0x00007faf76f7f023 in __libc_start_main () at /usr/lib/libc.so.6
#16 0x00005607b5c6105e in _start ()
[Inferior 1 (process 561) detached]

Possible duplicates by query: bug 419615, bug 419085, bug 418932, bug 418783, bug 418214.

Reported using DrKonqi