Application: kwin_x11 (5.14.5)

Qt Version: 5.12.0
Frameworks Version: 5.54.0
Operating System: Linux 4.20.3-1-MANJARO x86_64
Distribution: "Manjaro Linux"

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

Logging into my session after locking it.

This crash also occures randomly when I switch desktops.

The crash can be reproduced sometimes.

-- Backtrace:
Application: KWin (kwin_x11), signal: Segmentation fault
Using host libthread_db library "/usr/lib/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f5eb1aec840 (LWP 28174))]

Thread 6 (Thread 0x7f5e99954700 (LWP 30013)):
#0  0x00007f5ebab1ad16 in ppoll () at /usr/lib/libc.so.6
#1  0x00007f5eb96c546b in qt_safe_poll(pollfd*, unsigned long, timespec const*) () at /usr/lib/libQt5Core.so.5
#2  0x00007f5eb96c694b in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#3  0x00007f5eb967258c in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#4  0x00007f5eb94b65c9 in QThread::exec() () at /usr/lib/libQt5Core.so.5
#5  0x00007f5eb94b79cc in  () at /usr/lib/libQt5Core.so.5
#6  0x00007f5eb829aa9d in start_thread () at /usr/lib/libpthread.so.0
#7  0x00007f5ebab25b23 in clone () at /usr/lib/libc.so.6

Thread 5 (Thread 0x7f5e0e3dd700 (LWP 28372)):
#0  0x00007f5ebab1ad16 in ppoll () at /usr/lib/libc.so.6
#1  0x00007f5eb96c546b in qt_safe_poll(pollfd*, unsigned long, timespec const*) () at /usr/lib/libQt5Core.so.5
#2  0x00007f5eb96c694b in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#3  0x00007f5eb967258c in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#4  0x00007f5eb94b65c9 in QThread::exec() () at /usr/lib/libQt5Core.so.5
#5  0x00007f5eb7a5eb89 in  () at /usr/lib/libQt5Qml.so.5
#6  0x00007f5eb94b79cc in  () at /usr/lib/libQt5Core.so.5
#7  0x00007f5eb829aa9d in start_thread () at /usr/lib/libpthread.so.0
#8  0x00007f5ebab25b23 in clone () at /usr/lib/libc.so.6

Thread 4 (Thread 0x7f5e9913b700 (LWP 28370)):
#0  0x00007f5eb82a0afc in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007f5eb8fa128c in  () at /usr/lib/libQt5Script.so.5
#2  0x00007f5eb8fa12a9 in  () at /usr/lib/libQt5Script.so.5
#3  0x00007f5eb829aa9d in start_thread () at /usr/lib/libpthread.so.0
#4  0x00007f5ebab25b23 in clone () at /usr/lib/libc.so.6

Thread 3 (Thread 0x7f5ea9ffe700 (LWP 28225)):
#0  0x00007f5ebab1ad16 in ppoll () at /usr/lib/libc.so.6
#1  0x00007f5eb96c546b in qt_safe_poll(pollfd*, unsigned long, timespec const*) () at /usr/lib/libQt5Core.so.5
#2  0x00007f5eb96c694b in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#3  0x00007f5eb967258c in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#4  0x00007f5eb94b65c9 in QThread::exec() () at /usr/lib/libQt5Core.so.5
#5  0x00007f5eb7a5eb89 in  () at /usr/lib/libQt5Qml.so.5
#6  0x00007f5eb94b79cc in  () at /usr/lib/libQt5Core.so.5
#7  0x00007f5eb829aa9d in start_thread () at /usr/lib/libpthread.so.0
#8  0x00007f5ebab25b23 in clone () at /usr/lib/libc.so.6

Thread 2 (Thread 0x7f5eabbd5700 (LWP 28189)):
#0  0x00007f5ebab1ad16 in ppoll () at /usr/lib/libc.so.6
#1  0x00007f5eb96c546b in qt_safe_poll(pollfd*, unsigned long, timespec const*) () at /usr/lib/libQt5Core.so.5
#2  0x00007f5eb96c694b in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#3  0x00007f5eb967258c in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#4  0x00007f5eb94b65c9 in QThread::exec() () at /usr/lib/libQt5Core.so.5
#5  0x00007f5eb74c6ba6 in  () at /usr/lib/libQt5DBus.so.5
#6  0x00007f5eb94b79cc in  () at /usr/lib/libQt5Core.so.5
#7  0x00007f5eb829aa9d in start_thread () at /usr/lib/libpthread.so.0
#8  0x00007f5ebab25b23 in clone () at /usr/lib/libc.so.6

Thread 1 (Thread 0x7f5eb1aec840 (LWP 28174)):
[KCrash Handler]
#6  0x00007f5eb921d58b in KWin::WindowQuadList::makeInterleavedArrays(unsigned int, KWin::GLVertex2D*, QMatrix4x4 const&) const () at /usr/lib/libkwineffects.so.11
#7  0x00007f5ea8da7ccb in  () at /usr/lib/qt/plugins/org.kde.kwin.scenes/KWinSceneOpenGL.so
#8  0x00007f5ea8db1223 in  () at /usr/lib/qt/plugins/org.kde.kwin.scenes/KWinSceneOpenGL.so
#9  0x00007f5ea8db1369 in  () at /usr/lib/qt/plugins/org.kde.kwin.scenes/KWinSceneOpenGL.so
#10 0x00007f5eba8a653c in KWin::EffectsHandlerImpl::drawWindow(KWin::EffectWindow*, int, QRegion, KWin::WindowPaintData&) () at /usr/lib/libkwin.so.5
#11 0x00007f5eb91b3266 in  () at /usr/lib/libkwin4_effect_builtins.so.1
#12 0x00007f5eba8a64d4 in KWin::EffectsHandlerImpl::drawWindow(KWin::EffectWindow*, int, QRegion, KWin::WindowPaintData&) () at /usr/lib/libkwin.so.5
#13 0x00007f5eb912061a in  () at /usr/lib/libkwin4_effect_builtins.so.1
#14 0x00007f5eba8a64d4 in KWin::EffectsHandlerImpl::drawWindow(KWin::EffectWindow*, int, QRegion, KWin::WindowPaintData&) () at /usr/lib/libkwin.so.5
#15 0x00007f5eb921951d in KWin::Effect::drawWindow(KWin::EffectWindow*, int, QRegion, KWin::WindowPaintData&) () at /usr/lib/libkwineffects.so.11
#16 0x00007f5eba8a64d4 in KWin::EffectsHandlerImpl::drawWindow(KWin::EffectWindow*, int, QRegion, KWin::WindowPaintData&) () at /usr/lib/libkwin.so.5
#17 0x00007f5eb921951d in KWin::Effect::drawWindow(KWin::EffectWindow*, int, QRegion, KWin::WindowPaintData&) () at /usr/lib/libkwineffects.so.11
#18 0x00007f5eba8a64d4 in KWin::EffectsHandlerImpl::drawWindow(KWin::EffectWindow*, int, QRegion, KWin::WindowPaintData&) () at /usr/lib/libkwin.so.5
#19 0x00007f5eb921951d in KWin::Effect::drawWindow(KWin::EffectWindow*, int, QRegion, KWin::WindowPaintData&) () at /usr/lib/libkwineffects.so.11
#20 0x00007f5eba8a64d4 in KWin::EffectsHandlerImpl::drawWindow(KWin::EffectWindow*, int, QRegion, KWin::WindowPaintData&) () at /usr/lib/libkwin.so.5
#21 0x00007f5eba8923cd in KWin::Scene::finalPaintWindow(KWin::EffectWindowImpl*, int, QRegion, KWin::WindowPaintData&) () at /usr/lib/libkwin.so.5
#22 0x00007f5eba8a6365 in KWin::EffectsHandlerImpl::paintWindow(KWin::EffectWindow*, int, QRegion, KWin::WindowPaintData&) () at /usr/lib/libkwin.so.5
#23 0x00007f5eb92193ad in KWin::Effect::paintWindow(KWin::EffectWindow*, int, QRegion, KWin::WindowPaintData&) () at /usr/lib/libkwineffects.so.11
#24 0x00007f5eba8a6304 in KWin::EffectsHandlerImpl::paintWindow(KWin::EffectWindow*, int, QRegion, KWin::WindowPaintData&) () at /usr/lib/libkwin.so.5
#25 0x00007f5eb92193ad in KWin::Effect::paintWindow(KWin::EffectWindow*, int, QRegion, KWin::WindowPaintData&) () at /usr/lib/libkwineffects.so.11
#26 0x00007f5eba8a6304 in KWin::EffectsHandlerImpl::paintWindow(KWin::EffectWindow*, int, QRegion, KWin::WindowPaintData&) () at /usr/lib/libkwin.so.5
#27 0x00007f5eb914c152 in  () at /usr/lib/libkwin4_effect_builtins.so.1
#28 0x00007f5eba8a6304 in KWin::EffectsHandlerImpl::paintWindow(KWin::EffectWindow*, int, QRegion, KWin::WindowPaintData&) () at /usr/lib/libkwin.so.5
#29 0x00007f5eb9226cec in KWin::AnimationEffect::paintWindow(KWin::EffectWindow*, int, QRegion, KWin::WindowPaintData&) () at /usr/lib/libkwineffects.so.11
#30 0x00007f5eba8a6304 in KWin::EffectsHandlerImpl::paintWindow(KWin::EffectWindow*, int, QRegion, KWin::WindowPaintData&) () at /usr/lib/libkwin.so.5
#31 0x00007f5eb9226cec in KWin::AnimationEffect::paintWindow(KWin::EffectWindow*, int, QRegion, KWin::WindowPaintData&) () at /usr/lib/libkwineffects.so.11
#32 0x00007f5eba8a6304 in KWin::EffectsHandlerImpl::paintWindow(KWin::EffectWindow*, int, QRegion, KWin::WindowPaintData&) () at /usr/lib/libkwin.so.5
#33 0x00007f5eba898983 in KWin::Scene::paintWindow(KWin::Scene::Window*, int, QRegion, KWin::WindowQuadList) () at /usr/lib/libkwin.so.5
#34 0x00007f5eba895027 in KWin::Scene::paintSimpleScreen(int, QRegion) () at /usr/lib/libkwin.so.5
#35 0x00007f5ea8da3464 in  () at /usr/lib/qt/plugins/org.kde.kwin.scenes/KWinSceneOpenGL.so
#36 0x00007f5eba897f01 in KWin::Scene::finalPaintScreen(int, QRegion, KWin::ScreenPaintData&) () at /usr/lib/libkwin.so.5
#37 0x00007f5eba8a60b7 in KWin::EffectsHandlerImpl::paintScreen(int, QRegion, KWin::ScreenPaintData&) () at /usr/lib/libkwin.so.5
#38 0x00007f5eb9219302 in KWin::Effect::paintScreen(int, QRegion, KWin::ScreenPaintData&) () at /usr/lib/libkwineffects.so.11
#39 0x00007f5eba8a605e in KWin::EffectsHandlerImpl::paintScreen(int, QRegion, KWin::ScreenPaintData&) () at /usr/lib/libkwin.so.5
#40 0x00007f5eb9219302 in KWin::Effect::paintScreen(int, QRegion, KWin::ScreenPaintData&) () at /usr/lib/libkwineffects.so.11
#41 0x00007f5eba8a605e in KWin::EffectsHandlerImpl::paintScreen(int, QRegion, KWin::ScreenPaintData&) () at /usr/lib/libkwin.so.5
#42 0x00007f5eb9219302 in KWin::Effect::paintScreen(int, QRegion, KWin::ScreenPaintData&) () at /usr/lib/libkwineffects.so.11
#43 0x00007f5eba8a605e in KWin::EffectsHandlerImpl::paintScreen(int, QRegion, KWin::ScreenPaintData&) () at /usr/lib/libkwin.so.5
#44 0x00007f5eb9219302 in KWin::Effect::paintScreen(int, QRegion, KWin::ScreenPaintData&) () at /usr/lib/libkwineffects.so.11
#45 0x00007f5eba8a605e in KWin::EffectsHandlerImpl::paintScreen(int, QRegion, KWin::ScreenPaintData&) () at /usr/lib/libkwin.so.5
#46 0x00007f5eb9219302 in KWin::Effect::paintScreen(int, QRegion, KWin::ScreenPaintData&) () at /usr/lib/libkwineffects.so.11
#47 0x00007f5eba8a605e in KWin::EffectsHandlerImpl::paintScreen(int, QRegion, KWin::ScreenPaintData&) () at /usr/lib/libkwin.so.5
#48 0x00007f5eba897b9b in KWin::Scene::paintScreen(int*, QRegion const&, QRegion const&, QRegion*, QRegion*, QMatrix4x4 const&, QRect const&) () at /usr/lib/libkwin.so.5
#49 0x00007f5ea8dab477 in KWin::SceneOpenGL::paint(QRegion, QList<KWin::Toplevel*>) () at /usr/lib/qt/plugins/org.kde.kwin.scenes/KWinSceneOpenGL.so
#50 0x00007f5eba8894ce in KWin::Compositor::performCompositing() () at /usr/lib/libkwin.so.5
#51 0x00007f5eb969eb1b in QObject::event(QEvent*) () at /usr/lib/libQt5Core.so.5
#52 0x00007f5eba03be34 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/libQt5Widgets.so.5
#53 0x00007f5eba043671 in QApplication::notify(QObject*, QEvent*) () at /usr/lib/libQt5Widgets.so.5
#54 0x00007f5eb96738f9 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/libQt5Core.so.5
#55 0x00007f5eb96c8955 in QTimerInfoList::activateTimers() () at /usr/lib/libQt5Core.so.5
#56 0x00007f5eb96c6a9e in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#57 0x00007f5eb169fd4f in  () at /usr/lib/libQt5XcbQpa.so.5
#58 0x00007f5eb967258c in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#59 0x00007f5eb967a896 in QCoreApplication::exec() () at /usr/lib/libQt5Core.so.5
#60 0x00007f5ebabf7b26 in kdemain () at /usr/lib/libkdeinit5_kwin_x11.so
#61 0x00007f5ebaa4e223 in __libc_start_main () at /usr/lib/libc.so.6
#62 0x0000555d6d42b05e in _start ()
[Inferior 1 (process 28174) detached]

Reported using DrKonqi