Application: kwin_x11 (5.9.2)

Qt Version: 5.8.0
Frameworks Version: 5.31.0
Operating System: Linux 4.9.8-1-ARCH x86_64
Distribution: "Arch Linux"

-- Information about the crash:
- What I was doing when the application crashed:
Playing payday2 fullscreen (this is the first time I have a kwin crash in game)

- Unusual behavior I noticed:
The game seemed to be slower than usual, a bit laggy in combat-heavy scenes, with a bit of what could be seen as network lag. It might be related to new DDR2 sticks I installed recently (4GB -> 8GB), though it might be related to kwin, given the crash.
The game completely froze, so I switched to a virtual terminal, and noticed what seemed to be an unusual ram usage. WHen I went back, the game had crashed, and I had a kwin crash report prompt.

I am not sure this will be useful, but the backtrace seems more or less clean. I can't tell if kwin or the game initiated the crash.

Somewhat related: Interestingly, kickoff wouldn't show up when clicking on the icon just after the crash (while the other plasmoids are working fine). I solved it by using an alternative launcher and reverting.

-- Backtrace:
Application: KWin (kwin_x11), signal: Aborted
Using host libthread_db library "/usr/lib/libthread_db.so.1".
[Current thread is 1 (Thread 0x7fd77cf02840 (LWP 1697))]

Thread 7 (Thread 0x7fd743055700 (LWP 4526)):
[KCrash Handler]
#6  0x00007fd77c8b404f in raise () at /usr/lib/libc.so.6
#7  0x00007fd77c8b547a in abort () at /usr/lib/libc.so.6
#8  0x00007fd779da0e21 in  () at /usr/lib/libQt5Core.so.5
#9  0x00007fd7605bb3e3 in  () at /usr/lib/qt/plugins/org.kde.kwin.platforms/KWinX11Platform.so
#10 0x00007fd779fc10be in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/libQt5Core.so.5
#11 0x00007fd779fcdd98 in QTimer::timerEvent(QTimerEvent*) () at /usr/lib/libQt5Core.so.5
#12 0x00007fd779fc1b63 in QObject::event(QEvent*) () at /usr/lib/libQt5Core.so.5
#13 0x00007fd77ac7734c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/libQt5Widgets.so.5
#14 0x00007fd77ac7eb61 in QApplication::notify(QObject*, QEvent*) () at /usr/lib/libQt5Widgets.so.5
#15 0x00007fd779f95440 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/libQt5Core.so.5
#16 0x00007fd779fe8cbe in QTimerInfoList::activateTimers() () at /usr/lib/libQt5Core.so.5
#17 0x00007fd779fe6bda in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#18 0x00007fd779f9389a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#19 0x00007fd779db5a73 in QThread::exec() () at /usr/lib/libQt5Core.so.5
#20 0x00007fd779dba6d8 in  () at /usr/lib/libQt5Core.so.5
#21 0x00007fd775ba7454 in start_thread () at /usr/lib/libpthread.so.0
#22 0x00007fd77c9697df in clone () at /usr/lib/libc.so.6

Thread 6 (Thread 0x7fd742854700 (LWP 1848)):
#0  0x00007fd775bad10f in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007fd778f24234 in  () at /usr/lib/libQt5Script.so.5
#2  0x00007fd778f24279 in  () at /usr/lib/libQt5Script.so.5
#3  0x00007fd775ba7454 in start_thread () at /usr/lib/libpthread.so.0
#4  0x00007fd77c9697df in clone () at /usr/lib/libc.so.6

Thread 5 (Thread 0x7fd743b5b700 (LWP 1845)):
#0  0x00007fd775bad10f in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007fd74b63dc5b in  () at /usr/lib/xorg/modules/dri/r600_dri.so
#2  0x00007fd74b63dab7 in  () at /usr/lib/xorg/modules/dri/r600_dri.so
#3  0x00007fd775ba7454 in start_thread () at /usr/lib/libpthread.so.0
#4  0x00007fd77c9697df in clone () at /usr/lib/libc.so.6

Thread 4 (Thread 0x7fd759f79700 (LWP 1832)):
#0  0x00007fd77c960551 in ppoll () at /usr/lib/libc.so.6
#1  0x00007fd779fe52f9 in qt_safe_poll(pollfd*, unsigned long, timespec const*) () at /usr/lib/libQt5Core.so.5
#2  0x00007fd779fe696a in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#3  0x00007fd779f9389a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#4  0x00007fd779db5a73 in QThread::exec() () at /usr/lib/libQt5Core.so.5
#5  0x00007fd7748b6025 in  () at /usr/lib/libQt5Qml.so.5
#6  0x00007fd779dba6d8 in  () at /usr/lib/libQt5Core.so.5
#7  0x00007fd775ba7454 in start_thread () at /usr/lib/libpthread.so.0
#8  0x00007fd77c9697df in clone () at /usr/lib/libc.so.6

Thread 3 (Thread 0x7fd75bfff700 (LWP 1780)):
#0  0x00007fd77c960551 in ppoll () at /usr/lib/libc.so.6
#1  0x00007fd779fe52f9 in qt_safe_poll(pollfd*, unsigned long, timespec const*) () at /usr/lib/libQt5Core.so.5
#2  0x00007fd779fe696a in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#3  0x00007fd779f9389a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#4  0x00007fd779db5a73 in QThread::exec() () at /usr/lib/libQt5Core.so.5
#5  0x00007fd773a6c125 in  () at /usr/lib/libQt5DBus.so.5
#6  0x00007fd779dba6d8 in  () at /usr/lib/libQt5Core.so.5
#7  0x00007fd775ba7454 in start_thread () at /usr/lib/libpthread.so.0
#8  0x00007fd77c9697df in clone () at /usr/lib/libc.so.6

Thread 2 (Thread 0x7fd762726700 (LWP 1761)):
#0  0x00007fd775bad10f in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007fd77ba7cb57 in  () at /usr/lib/libxcb.so.1
#2  0x00007fd77ba7e679 in xcb_wait_for_event () at /usr/lib/libxcb.so.1
#3  0x00007fd7633d6239 in  () at /usr/lib/libQt5XcbQpa.so.5
#4  0x00007fd779dba6d8 in  () at /usr/lib/libQt5Core.so.5
#5  0x00007fd775ba7454 in start_thread () at /usr/lib/libpthread.so.0
#6  0x00007fd77c9697df in clone () at /usr/lib/libc.so.6

Thread 1 (Thread 0x7fd77cf02840 (LWP 1697)):
#0  0x00007fd77c96048d in poll () at /usr/lib/libc.so.6
#1  0x00007fd77ba7c8e0 in  () at /usr/lib/libxcb.so.1
#2  0x00007fd77ba7e39f in  () at /usr/lib/libxcb.so.1
#3  0x00007fd77ba7e4b2 in xcb_wait_for_reply () at /usr/lib/libxcb.so.1
#4  0x00007fd77c49fbf3 in KWin::OverlayWindow::create() () at /usr/lib/libkwin.so.5
#5  0x00007fd7605d1dec in KWin::EglOnXBackend::initRenderingContext() () at /usr/lib/qt/plugins/org.kde.kwin.platforms/KWinX11Platform.so
#6  0x00007fd7605d370f in KWin::EglOnXBackend::init() () at /usr/lib/qt/plugins/org.kde.kwin.platforms/KWinX11Platform.so
#7  0x00007fd77c5001b9 in KWin::SceneOpenGL::createScene(QObject*) () at /usr/lib/libkwin.so.5
#8  0x00007fd77c4d775c in KWin::Compositor::slotCompositingOptionsInitialized() () at /usr/lib/libkwin.so.5
#9  0x00007fd77c4d8138 in KWin::Compositor::setup() () at /usr/lib/libkwin.so.5
#10 0x00007fd779fc1ba9 in QObject::event(QEvent*) () at /usr/lib/libQt5Core.so.5
#11 0x00007fd77ac7734c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/libQt5Widgets.so.5
#12 0x00007fd77ac7eb61 in QApplication::notify(QObject*, QEvent*) () at /usr/lib/libQt5Widgets.so.5
#13 0x00007fd779f95440 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/libQt5Core.so.5
#14 0x00007fd779f97bcd in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () at /usr/lib/libQt5Core.so.5
#15 0x00007fd779fe6797 in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#16 0x00007fd763436ded in  () at /usr/lib/libQt5XcbQpa.so.5
#17 0x00007fd779f9389a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#18 0x00007fd779f9bde4 in QCoreApplication::exec() () at /usr/lib/libQt5Core.so.5
#19 0x00007fd77cc28391 in kdemain () at /usr/lib/libkdeinit5_kwin_x11.so
#20 0x00007fd77c8a1291 in __libc_start_main () at /usr/lib/libc.so.6
#21 0x000000000040069a in _start ()

Reported using DrKonqi