Application: kwin_x11 (5.14.5)

Qt Version: 5.12.1
Frameworks Version: 5.55.0
Operating System: Linux 4.20.7-arch1-1-ARCH x86_64
Distribution (Platform): Archlinux Packages

-- Information about the crash:
I had atom, konsole, okular open all snapped to sides and corners

The crash can be reproduced every time.

-- Backtrace:
Application: KWin (kwin_x11), signal: Aborted
Using host libthread_db library "/usr/lib/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f3079a2e840 (LWP 1084))]

Thread 9 (Thread 0x7f2fc9d8f700 (LWP 20596)):
#0  0x00007f3082882d16 in ppoll () at /usr/lib/libc.so.6
#1  0x00007f3081428bab in qt_safe_poll(pollfd*, unsigned long, timespec const*) () at /usr/lib/libQt5Core.so.5
#2  0x00007f308142a08b in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#3  0x00007f30813d5b2c in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#4  0x00007f3081219569 in QThread::exec() () at /usr/lib/libQt5Core.so.5
#5  0x00007f307f9b6969 in  () at /usr/lib/libQt5Qml.so.5
#6  0x00007f308121a96c in  () at /usr/lib/libQt5Core.so.5
#7  0x00007f30801f9a9d in start_thread () at /usr/lib/libpthread.so.0
#8  0x00007f308288db23 in clone () at /usr/lib/libc.so.6

Thread 8 (Thread 0x7f3070c59700 (LWP 16015)):
#0  0x00007f3082882d16 in ppoll () at /usr/lib/libc.so.6
#1  0x00007f3081428bab in qt_safe_poll(pollfd*, unsigned long, timespec const*) () at /usr/lib/libQt5Core.so.5
#2  0x00007f308142a08b in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#3  0x00007f30813d5b2c in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#4  0x00007f3081219569 in QThread::exec() () at /usr/lib/libQt5Core.so.5
#5  0x00007f307f9b6969 in  () at /usr/lib/libQt5Qml.so.5
#6  0x00007f308121a96c in  () at /usr/lib/libQt5Core.so.5
#7  0x00007f30801f9a9d in start_thread () at /usr/lib/libpthread.so.0
#8  0x00007f308288db23 in clone () at /usr/lib/libc.so.6

Thread 7 (Thread 0x7f30729c4700 (LWP 7436)):
#0  0x00007f3082882d16 in ppoll () at /usr/lib/libc.so.6
#1  0x00007f3081428bab in qt_safe_poll(pollfd*, unsigned long, timespec const*) () at /usr/lib/libQt5Core.so.5
#2  0x00007f308142a08b in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#3  0x00007f30813d5b2c in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#4  0x00007f3081219569 in QThread::exec() () at /usr/lib/libQt5Core.so.5
#5  0x00007f307f9b6969 in  () at /usr/lib/libQt5Qml.so.5
#6  0x00007f308121a96c in  () at /usr/lib/libQt5Core.so.5
#7  0x00007f30801f9a9d in start_thread () at /usr/lib/libpthread.so.0
#8  0x00007f308288db23 in clone () at /usr/lib/libc.so.6

Thread 6 (Thread 0x7f3061e58700 (LWP 1184)):
#0  0x00007f30801ffafc in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007f3080d0428c in  () at /usr/lib/libQt5Script.so.5
#2  0x00007f3080d042a9 in  () at /usr/lib/libQt5Script.so.5
#3  0x00007f30801f9a9d in start_thread () at /usr/lib/libpthread.so.0
#4  0x00007f308288db23 in clone () at /usr/lib/libc.so.6

Thread 5 (Thread 0x7f3062e5a700 (LWP 1174)):
#0  0x00007f30801ffafc in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007f30633f6c84 in  () at /usr/lib/dri/i965_dri.so
#2  0x00007f30633f69a8 in  () at /usr/lib/dri/i965_dri.so
#3  0x00007f30801f9a9d in start_thread () at /usr/lib/libpthread.so.0
#4  0x00007f308288db23 in clone () at /usr/lib/libc.so.6

Thread 4 (Thread 0x7f3071ec6700 (LWP 1140)):
#0  0x00007f3082882d16 in ppoll () at /usr/lib/libc.so.6
#1  0x00007f3081428bab in qt_safe_poll(pollfd*, unsigned long, timespec const*) () at /usr/lib/libQt5Core.so.5
#2  0x00007f308142a08b in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#3  0x00007f30813d5b2c in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#4  0x00007f3081219569 in QThread::exec() () at /usr/lib/libQt5Core.so.5
#5  0x00007f307f9b6969 in  () at /usr/lib/libQt5Qml.so.5
#6  0x00007f308121a96c in  () at /usr/lib/libQt5Core.so.5
#7  0x00007f30801f9a9d in start_thread () at /usr/lib/libpthread.so.0
#8  0x00007f308288db23 in clone () at /usr/lib/libc.so.6

Thread 3 (Thread 0x7f3073bd5700 (LWP 1103)):
#0  0x00007f3082882d16 in ppoll () at /usr/lib/libc.so.6
#1  0x00007f3081428bab in qt_safe_poll(pollfd*, unsigned long, timespec const*) () at /usr/lib/libQt5Core.so.5
#2  0x00007f308142a08b in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#3  0x00007f30813d5b2c in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#4  0x00007f3081219569 in QThread::exec() () at /usr/lib/libQt5Core.so.5
#5  0x00007f307f41bba6 in  () at /usr/lib/libQt5DBus.so.5
#6  0x00007f308121a96c in  () at /usr/lib/libQt5Core.so.5
#7  0x00007f30801f9a9d in start_thread () at /usr/lib/libpthread.so.0
#8  0x00007f308288db23 in clone () at /usr/lib/libc.so.6

Thread 2 (Thread 0x7f30792d4700 (LWP 1094)):
#0  0x00007f3082882c21 in poll () at /usr/lib/libc.so.6
#1  0x00007f308113e630 in  () at /usr/lib/libxcb.so.1
#2  0x00007f30811402db in xcb_wait_for_event () at /usr/lib/libxcb.so.1
#3  0x00007f307960a949 in  () at /usr/lib/libQt5XcbQpa.so.5
#4  0x00007f308121a96c in  () at /usr/lib/libQt5Core.so.5
#5  0x00007f30801f9a9d in start_thread () at /usr/lib/libpthread.so.0
#6  0x00007f308288db23 in clone () at /usr/lib/libc.so.6

Thread 1 (Thread 0x7f3079a2e840 (LWP 1084)):
[KCrash Handler]
#6  0x00007f30827c9d7f in raise () at /usr/lib/libc.so.6
#7  0x00007f30827b4672 in abort () at /usr/lib/libc.so.6
#8  0x00007f30811e07fc in  () at /usr/lib/libQt5Core.so.5
#9  0x00007f3080f7feda in KWin::WindowQuad::makeSubQuad(double, double, double, double) const () at /usr/lib/libkwineffects.so.11
#10 0x00007f3070c6d53d in  () at /usr/lib/qt/plugins/org.kde.kwin.scenes/KWinSceneOpenGL.so
#11 0x00007f3070c6d698 in  () at /usr/lib/qt/plugins/org.kde.kwin.scenes/KWinSceneOpenGL.so
#12 0x00007f3070c77223 in  () at /usr/lib/qt/plugins/org.kde.kwin.scenes/KWinSceneOpenGL.so
#13 0x00007f3070c77369 in  () at /usr/lib/qt/plugins/org.kde.kwin.scenes/KWinSceneOpenGL.so
#14 0x00007f308260e53c in KWin::EffectsHandlerImpl::drawWindow(KWin::EffectWindow*, int, QRegion, KWin::WindowPaintData&) () at /usr/lib/libkwin.so.5
#15 0x00007f3080f7c51d in KWin::Effect::drawWindow(KWin::EffectWindow*, int, QRegion, KWin::WindowPaintData&) () at /usr/lib/libkwineffects.so.11
#16 0x00007f308260e4d4 in KWin::EffectsHandlerImpl::drawWindow(KWin::EffectWindow*, int, QRegion, KWin::WindowPaintData&) () at /usr/lib/libkwin.so.5
#17 0x00007f3080f16266 in  () at /usr/lib/libkwin4_effect_builtins.so.1
#18 0x00007f308260e4d4 in KWin::EffectsHandlerImpl::drawWindow(KWin::EffectWindow*, int, QRegion, KWin::WindowPaintData&) () at /usr/lib/libkwin.so.5
#19 0x00007f3080e8361a in  () at /usr/lib/libkwin4_effect_builtins.so.1
#20 0x00007f308260e4d4 in KWin::EffectsHandlerImpl::drawWindow(KWin::EffectWindow*, int, QRegion, KWin::WindowPaintData&) () at /usr/lib/libkwin.so.5
#21 0x00007f3080f7c51d in KWin::Effect::drawWindow(KWin::EffectWindow*, int, QRegion, KWin::WindowPaintData&) () at /usr/lib/libkwineffects.so.11
#22 0x00007f308260e4d4 in KWin::EffectsHandlerImpl::drawWindow(KWin::EffectWindow*, int, QRegion, KWin::WindowPaintData&) () at /usr/lib/libkwin.so.5
#23 0x00007f3080f7c51d in KWin::Effect::drawWindow(KWin::EffectWindow*, int, QRegion, KWin::WindowPaintData&) () at /usr/lib/libkwineffects.so.11
#24 0x00007f308260e4d4 in KWin::EffectsHandlerImpl::drawWindow(KWin::EffectWindow*, int, QRegion, KWin::WindowPaintData&) () at /usr/lib/libkwin.so.5
#25 0x00007f3080f7c51d in KWin::Effect::drawWindow(KWin::EffectWindow*, int, QRegion, KWin::WindowPaintData&) () at /usr/lib/libkwineffects.so.11
#26 0x00007f308260e4d4 in KWin::EffectsHandlerImpl::drawWindow(KWin::EffectWindow*, int, QRegion, KWin::WindowPaintData&) () at /usr/lib/libkwin.so.5
#27 0x00007f3080f7c51d in KWin::Effect::drawWindow(KWin::EffectWindow*, int, QRegion, KWin::WindowPaintData&) () at /usr/lib/libkwineffects.so.11
#28 0x00007f308260e4d4 in KWin::EffectsHandlerImpl::drawWindow(KWin::EffectWindow*, int, QRegion, KWin::WindowPaintData&) () at /usr/lib/libkwin.so.5
#29 0x00007f3080f7c51d in KWin::Effect::drawWindow(KWin::EffectWindow*, int, QRegion, KWin::WindowPaintData&) () at /usr/lib/libkwineffects.so.11
#30 0x00007f308260e4d4 in KWin::EffectsHandlerImpl::drawWindow(KWin::EffectWindow*, int, QRegion, KWin::WindowPaintData&) () at /usr/lib/libkwin.so.5
#31 0x00007f30825fa3cd in KWin::Scene::finalPaintWindow(KWin::EffectWindowImpl*, int, QRegion, KWin::WindowPaintData&) () at /usr/lib/libkwin.so.5
#32 0x00007f308260e365 in KWin::EffectsHandlerImpl::paintWindow(KWin::EffectWindow*, int, QRegion, KWin::WindowPaintData&) () at /usr/lib/libkwin.so.5
#33 0x00007f3080f7c3ad in KWin::Effect::paintWindow(KWin::EffectWindow*, int, QRegion, KWin::WindowPaintData&) () at /usr/lib/libkwineffects.so.11
#34 0x00007f308260e304 in KWin::EffectsHandlerImpl::paintWindow(KWin::EffectWindow*, int, QRegion, KWin::WindowPaintData&) () at /usr/lib/libkwin.so.5
#35 0x00007f3080f7c3ad in KWin::Effect::paintWindow(KWin::EffectWindow*, int, QRegion, KWin::WindowPaintData&) () at /usr/lib/libkwineffects.so.11
#36 0x00007f308260e304 in KWin::EffectsHandlerImpl::paintWindow(KWin::EffectWindow*, int, QRegion, KWin::WindowPaintData&) () at /usr/lib/libkwin.so.5
#37 0x00007f3080f7c3ad in KWin::Effect::paintWindow(KWin::EffectWindow*, int, QRegion, KWin::WindowPaintData&) () at /usr/lib/libkwineffects.so.11
#38 0x00007f308260e304 in KWin::EffectsHandlerImpl::paintWindow(KWin::EffectWindow*, int, QRegion, KWin::WindowPaintData&) () at /usr/lib/libkwin.so.5
#39 0x00007f3080e99d30 in  () at /usr/lib/libkwin4_effect_builtins.so.1
#40 0x00007f308260e304 in KWin::EffectsHandlerImpl::paintWindow(KWin::EffectWindow*, int, QRegion, KWin::WindowPaintData&) () at /usr/lib/libkwin.so.5
#41 0x00007f3080eaf152 in  () at /usr/lib/libkwin4_effect_builtins.so.1
#42 0x00007f308260e304 in KWin::EffectsHandlerImpl::paintWindow(KWin::EffectWindow*, int, QRegion, KWin::WindowPaintData&) () at /usr/lib/libkwin.so.5
#43 0x00007f3080eba55a in  () at /usr/lib/libkwin4_effect_builtins.so.1
#44 0x00007f308260e304 in KWin::EffectsHandlerImpl::paintWindow(KWin::EffectWindow*, int, QRegion, KWin::WindowPaintData&) () at /usr/lib/libkwin.so.5
#45 0x00007f3080f89cec in KWin::AnimationEffect::paintWindow(KWin::EffectWindow*, int, QRegion, KWin::WindowPaintData&) () at /usr/lib/libkwineffects.so.11
#46 0x00007f308260e304 in KWin::EffectsHandlerImpl::paintWindow(KWin::EffectWindow*, int, QRegion, KWin::WindowPaintData&) () at /usr/lib/libkwin.so.5
#47 0x00007f3080f89cec in KWin::AnimationEffect::paintWindow(KWin::EffectWindow*, int, QRegion, KWin::WindowPaintData&) () at /usr/lib/libkwineffects.so.11
#48 0x00007f308260e304 in KWin::EffectsHandlerImpl::paintWindow(KWin::EffectWindow*, int, QRegion, KWin::WindowPaintData&) () at /usr/lib/libkwin.so.5
#49 0x00007f3082600983 in KWin::Scene::paintWindow(KWin::Scene::Window*, int, QRegion, KWin::WindowQuadList) () at /usr/lib/libkwin.so.5
#50 0x00007f30825fe8d0 in KWin::Scene::paintGenericScreen(int, KWin::ScreenPaintData) () at /usr/lib/libkwin.so.5
#51 0x00007f3070c7710e in  () at /usr/lib/qt/plugins/org.kde.kwin.scenes/KWinSceneOpenGL.so
#52 0x00007f30825ffeb8 in KWin::Scene::finalPaintScreen(int, QRegion, KWin::ScreenPaintData&) () at /usr/lib/libkwin.so.5
#53 0x00007f308260e0b7 in KWin::EffectsHandlerImpl::paintScreen(int, QRegion, KWin::ScreenPaintData&) () at /usr/lib/libkwin.so.5
#54 0x00007f3080f0910b in  () at /usr/lib/libkwin4_effect_builtins.so.1
#55 0x00007f308260e05e in KWin::EffectsHandlerImpl::paintScreen(int, QRegion, KWin::ScreenPaintData&) () at /usr/lib/libkwin.so.5
#56 0x00007f3080f7c302 in KWin::Effect::paintScreen(int, QRegion, KWin::ScreenPaintData&) () at /usr/lib/libkwineffects.so.11
#57 0x00007f308260e05e in KWin::EffectsHandlerImpl::paintScreen(int, QRegion, KWin::ScreenPaintData&) () at /usr/lib/libkwin.so.5
#58 0x00007f3080f7c302 in KWin::Effect::paintScreen(int, QRegion, KWin::ScreenPaintData&) () at /usr/lib/libkwineffects.so.11
#59 0x00007f308260e05e in KWin::EffectsHandlerImpl::paintScreen(int, QRegion, KWin::ScreenPaintData&) () at /usr/lib/libkwin.so.5
#60 0x00007f3080e9ca21 in  () at /usr/lib/libkwin4_effect_builtins.so.1
#61 0x00007f3080e9cd1f in  () at /usr/lib/libkwin4_effect_builtins.so.1
#62 0x00007f308260e05e in KWin::EffectsHandlerImpl::paintScreen(int, QRegion, KWin::ScreenPaintData&) () at /usr/lib/libkwin.so.5
#63 0x00007f3080f7c302 in KWin::Effect::paintScreen(int, QRegion, KWin::ScreenPaintData&) () at /usr/lib/libkwineffects.so.11
#64 0x00007f308260e05e in KWin::EffectsHandlerImpl::paintScreen(int, QRegion, KWin::ScreenPaintData&) () at /usr/lib/libkwin.so.5
#65 0x00007f3080f7c302 in KWin::Effect::paintScreen(int, QRegion, KWin::ScreenPaintData&) () at /usr/lib/libkwineffects.so.11
#66 0x00007f308260e05e in KWin::EffectsHandlerImpl::paintScreen(int, QRegion, KWin::ScreenPaintData&) () at /usr/lib/libkwin.so.5
#67 0x00007f3080f7c302 in KWin::Effect::paintScreen(int, QRegion, KWin::ScreenPaintData&) () at /usr/lib/libkwineffects.so.11
#68 0x00007f308260e05e in KWin::EffectsHandlerImpl::paintScreen(int, QRegion, KWin::ScreenPaintData&) () at /usr/lib/libkwin.so.5
#69 0x00007f3080f7c302 in KWin::Effect::paintScreen(int, QRegion, KWin::ScreenPaintData&) () at /usr/lib/libkwineffects.so.11
#70 0x00007f308260e05e in KWin::EffectsHandlerImpl::paintScreen(int, QRegion, KWin::ScreenPaintData&) () at /usr/lib/libkwin.so.5
#71 0x00007f30825ffb9b in KWin::Scene::paintScreen(int*, QRegion const&, QRegion const&, QRegion*, QRegion*, QMatrix4x4 const&, QRect const&) () at /usr/lib/libkwin.so.5
#72 0x00007f3070c71477 in KWin::SceneOpenGL::paint(QRegion, QList<KWin::Toplevel*>) () at /usr/lib/qt/plugins/org.kde.kwin.scenes/KWinSceneOpenGL.so
#73 0x00007f30825f14ce in KWin::Compositor::performCompositing() () at /usr/lib/libkwin.so.5
#74 0x00007f308140210b in QObject::event(QEvent*) () at /usr/lib/libQt5Core.so.5
#75 0x00007f3081da0e24 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/libQt5Widgets.so.5
#76 0x00007f3081da86e1 in QApplication::notify(QObject*, QEvent*) () at /usr/lib/libQt5Widgets.so.5
#77 0x00007f30813d6e99 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/libQt5Core.so.5
#78 0x00007f308142c095 in QTimerInfoList::activateTimers() () at /usr/lib/libQt5Core.so.5
#79 0x00007f308142a1de in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#80 0x00007f307960bcbf in  () at /usr/lib/libQt5XcbQpa.so.5
#81 0x00007f30813d5b2c in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#82 0x00007f30813dde36 in QCoreApplication::exec() () at /usr/lib/libQt5Core.so.5
#83 0x00007f308295fb26 in kdemain () at /usr/lib/libkdeinit5_kwin_x11.so
#84 0x00007f30827b6223 in __libc_start_main () at /usr/lib/libc.so.6
#85 0x000055729f64a05e in _start ()
[Inferior 1 (process 1084) detached]

Reported using DrKonqi