Application: kwin_x11 (5.12.7)

Qt Version: 5.9.5
Frameworks Version: 5.44.0
Operating System: Linux 4.15.0-45-lowlatency x86_64
Distribution: Ubuntu 18.04.2 LTS

-- Information about the crash:
- Closed Dolphin and Changed Desktop Space, doing one action very close to the other.

- Custom settings of the application: None

The crash can be reproduced sometimes.

-- Backtrace:
Application: KWin (kwin_x11), signal: Aborted
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f574ad95cc0 (LWP 1562))]

Thread 6 (Thread 0x7f57152cb700 (LWP 1727)):
#0  0x00007f57437669f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x7f5746cfdfb8) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f57437669f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x7f5746cfdf68, cond=0x7f5746cfdf90) at pthread_cond_wait.c:502
#2  0x00007f57437669f3 in __pthread_cond_wait (cond=0x7f5746cfdf90, mutex=0x7f5746cfdf68) at pthread_cond_wait.c:655
#3  0x00007f5746a075f4 in  () at /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#4  0x00007f5746a07639 in  () at /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#5  0x00007f57437606db in start_thread (arg=0x7f57152cb700) at pthread_create.c:463
#6  0x00007f574a70788f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 5 (Thread 0x7f571767e700 (LWP 1686)):
#0  0x00007f57437669f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55bfe55a4ac8) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f57437669f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x55bfe55a4a78, cond=0x55bfe55a4aa0) at pthread_cond_wait.c:502
#2  0x00007f57437669f3 in __pthread_cond_wait (cond=0x55bfe55a4aa0, mutex=0x55bfe55a4a78) at pthread_cond_wait.c:655
#3  0x00007f5720379b1b in  () at /usr/lib/x86_64-linux-gnu/dri/i965_dri.so
#4  0x00007f5720379847 in  () at /usr/lib/x86_64-linux-gnu/dri/i965_dri.so
#5  0x00007f57437606db in start_thread (arg=0x7f571767e700) at pthread_create.c:463
#6  0x00007f574a70788f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 4 (Thread 0x7f5723dbe700 (LWP 1671)):
#0  0x00007f574a6facf6 in __GI_ppoll (fds=0x7f5718000d28, nfds=1, timeout=<optimized out>, sigmask=0x0) at ../sysdeps/unix/sysv/linux/ppoll.c:39
#1  0x00007f5747afc5c1 in qt_safe_poll(pollfd*, unsigned long, timespec const*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x00007f5747afdcde in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#3  0x00007f5747aa59ea in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f57478c422a in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f574224c6f5 in  () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#6  0x00007f57478c916d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f57437606db in start_thread (arg=0x7f5723dbe700) at pthread_create.c:463
#8  0x00007f574a70788f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 3 (Thread 0x7f572a5b9700 (LWP 1608)):
#0  0x00007f574a6facf6 in __GI_ppoll (fds=0x7f572400af48, nfds=1, timeout=<optimized out>, sigmask=0x0) at ../sysdeps/unix/sysv/linux/ppoll.c:39
#1  0x00007f5747afc5c1 in qt_safe_poll(pollfd*, unsigned long, timespec const*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x00007f5747afdcde in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#3  0x00007f5747aa59ea in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f57478c422a in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f5741125d45 in  () at /usr/lib/x86_64-linux-gnu/libQt5DBus.so.5
#6  0x00007f57478c916d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f57437606db in start_thread (arg=0x7f572a5b9700) at pthread_create.c:463
#8  0x00007f574a70788f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 2 (Thread 0x7f5730d28700 (LWP 1593)):
#0  0x00007f574a6fabf9 in __GI___poll (fds=0x7f5730d27c68, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f5749604747 in  () at /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007f574960636a in xcb_wait_for_event () at /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007f5731c072a9 in  () at /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#4  0x00007f57478c916d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f57437606db in start_thread (arg=0x7f5730d28700) at pthread_create.c:463
#6  0x00007f574a70788f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 1 (Thread 0x7f574ad95cc0 (LWP 1562)):
[KCrash Handler]
#6  0x00007f574a624e97 in __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:51
#7  0x00007f574a626801 in __GI_abort () at abort.c:79
#8  0x00007f57478b3fa7 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007f5747273e0c in KWin::WindowQuad::makeSubQuad(double, double, double, double) const () at /usr/lib/x86_64-linux-gnu/libkwineffects.so.11
#10 0x00007f57227aa475 in  () at /usr/lib/x86_64-linux-gnu/qt5/plugins/org.kde.kwin.scenes/KWinSceneOpenGL.so
#11 0x00007f57227aa716 in  () at /usr/lib/x86_64-linux-gnu/qt5/plugins/org.kde.kwin.scenes/KWinSceneOpenGL.so
#12 0x00007f57227b3653 in  () at /usr/lib/x86_64-linux-gnu/qt5/plugins/org.kde.kwin.scenes/KWinSceneOpenGL.so
#13 0x00007f57227b3787 in  () at /usr/lib/x86_64-linux-gnu/qt5/plugins/org.kde.kwin.scenes/KWinSceneOpenGL.so
#14 0x00007f574a269956 in KWin::EffectsHandlerImpl::drawWindow(KWin::EffectWindow*, int, QRegion, KWin::WindowPaintData&) () at /usr/lib/x86_64-linux-gnu/libkwin.so.5
#15 0x00007f5747270620 in KWin::Effect::drawWindow(KWin::EffectWindow*, int, QRegion, KWin::WindowPaintData&) () at /usr/lib/x86_64-linux-gnu/libkwineffects.so.11
#16 0x00007f574a2698ee in KWin::EffectsHandlerImpl::drawWindow(KWin::EffectWindow*, int, QRegion, KWin::WindowPaintData&) () at /usr/lib/x86_64-linux-gnu/libkwin.so.5
#17 0x00007f5747011876 in  () at /usr/lib/x86_64-linux-gnu/libkwin4_effect_builtins.so.1
#18 0x00007f574a2698ee in KWin::EffectsHandlerImpl::drawWindow(KWin::EffectWindow*, int, QRegion, KWin::WindowPaintData&) () at /usr/lib/x86_64-linux-gnu/libkwin.so.5
#19 0x00007f5746f8123d in  () at /usr/lib/x86_64-linux-gnu/libkwin4_effect_builtins.so.1
#20 0x00007f574a2698ee in KWin::EffectsHandlerImpl::drawWindow(KWin::EffectWindow*, int, QRegion, KWin::WindowPaintData&) () at /usr/lib/x86_64-linux-gnu/libkwin.so.5
#21 0x00007f5747270620 in KWin::Effect::drawWindow(KWin::EffectWindow*, int, QRegion, KWin::WindowPaintData&) () at /usr/lib/x86_64-linux-gnu/libkwineffects.so.11
#22 0x00007f574a2698ee in KWin::EffectsHandlerImpl::drawWindow(KWin::EffectWindow*, int, QRegion, KWin::WindowPaintData&) () at /usr/lib/x86_64-linux-gnu/libkwin.so.5
#23 0x00007f5747270620 in KWin::Effect::drawWindow(KWin::EffectWindow*, int, QRegion, KWin::WindowPaintData&) () at /usr/lib/x86_64-linux-gnu/libkwineffects.so.11
#24 0x00007f574a2698ee in KWin::EffectsHandlerImpl::drawWindow(KWin::EffectWindow*, int, QRegion, KWin::WindowPaintData&) () at /usr/lib/x86_64-linux-gnu/libkwin.so.5
#25 0x00007f574a255860 in KWin::Scene::finalPaintWindow(KWin::EffectWindowImpl*, int, QRegion, KWin::WindowPaintData&) () at /usr/lib/x86_64-linux-gnu/libkwin.so.5
#26 0x00007f574a26977d in KWin::EffectsHandlerImpl::paintWindow(KWin::EffectWindow*, int, QRegion, KWin::WindowPaintData&) () at /usr/lib/x86_64-linux-gnu/libkwin.so.5
#27 0x00007f57472704b0 in KWin::Effect::paintWindow(KWin::EffectWindow*, int, QRegion, KWin::WindowPaintData&) () at /usr/lib/x86_64-linux-gnu/libkwineffects.so.11
#28 0x00007f574a26971e in KWin::EffectsHandlerImpl::paintWindow(KWin::EffectWindow*, int, QRegion, KWin::WindowPaintData&) () at /usr/lib/x86_64-linux-gnu/libkwin.so.5
#29 0x00007f57472704b0 in KWin::Effect::paintWindow(KWin::EffectWindow*, int, QRegion, KWin::WindowPaintData&) () at /usr/lib/x86_64-linux-gnu/libkwineffects.so.11
#30 0x00007f574a26971e in KWin::EffectsHandlerImpl::paintWindow(KWin::EffectWindow*, int, QRegion, KWin::WindowPaintData&) () at /usr/lib/x86_64-linux-gnu/libkwin.so.5
#31 0x00007f57472704b0 in KWin::Effect::paintWindow(KWin::EffectWindow*, int, QRegion, KWin::WindowPaintData&) () at /usr/lib/x86_64-linux-gnu/libkwineffects.so.11
#32 0x00007f574a26971e in KWin::EffectsHandlerImpl::paintWindow(KWin::EffectWindow*, int, QRegion, KWin::WindowPaintData&) () at /usr/lib/x86_64-linux-gnu/libkwin.so.5
#33 0x00007f5746ffd06a in  () at /usr/lib/x86_64-linux-gnu/libkwin4_effect_builtins.so.1
#34 0x00007f574a26971e in KWin::EffectsHandlerImpl::paintWindow(KWin::EffectWindow*, int, QRegion, KWin::WindowPaintData&) () at /usr/lib/x86_64-linux-gnu/libkwin.so.5
#35 0x00007f5746fd26c4 in  () at /usr/lib/x86_64-linux-gnu/libkwin4_effect_builtins.so.1
#36 0x00007f574a26971e in KWin::EffectsHandlerImpl::paintWindow(KWin::EffectWindow*, int, QRegion, KWin::WindowPaintData&) () at /usr/lib/x86_64-linux-gnu/libkwin.so.5
#37 0x00007f574a25bbd2 in KWin::Scene::paintWindow(KWin::Scene::Window*, int, QRegion, KWin::WindowQuadList) () at /usr/lib/x86_64-linux-gnu/libkwin.so.5
#38 0x00007f574a2585d7 in KWin::Scene::paintGenericScreen(int, KWin::ScreenPaintData) () at /usr/lib/x86_64-linux-gnu/libkwin.so.5
#39 0x00007f57227b3462 in  () at /usr/lib/x86_64-linux-gnu/qt5/plugins/org.kde.kwin.scenes/KWinSceneOpenGL.so
#40 0x00007f574a25b1b0 in KWin::Scene::finalPaintScreen(int, QRegion, KWin::ScreenPaintData&) () at /usr/lib/x86_64-linux-gnu/libkwin.so.5
#41 0x00007f574a2694d5 in KWin::EffectsHandlerImpl::paintScreen(int, QRegion, KWin::ScreenPaintData&) () at /usr/lib/x86_64-linux-gnu/libkwin.so.5
#42 0x00007f5747003323 in  () at /usr/lib/x86_64-linux-gnu/libkwin4_effect_builtins.so.1
#43 0x00007f574a26947d in KWin::EffectsHandlerImpl::paintScreen(int, QRegion, KWin::ScreenPaintData&) () at /usr/lib/x86_64-linux-gnu/libkwin.so.5
#44 0x00007f5747270401 in KWin::Effect::paintScreen(int, QRegion, KWin::ScreenPaintData&) () at /usr/lib/x86_64-linux-gnu/libkwineffects.so.11
#45 0x00007f574a26947d in KWin::EffectsHandlerImpl::paintScreen(int, QRegion, KWin::ScreenPaintData&) () at /usr/lib/x86_64-linux-gnu/libkwin.so.5
#46 0x00007f5747270401 in KWin::Effect::paintScreen(int, QRegion, KWin::ScreenPaintData&) () at /usr/lib/x86_64-linux-gnu/libkwineffects.so.11
#47 0x00007f574a26947d in KWin::EffectsHandlerImpl::paintScreen(int, QRegion, KWin::ScreenPaintData&) () at /usr/lib/x86_64-linux-gnu/libkwin.so.5
#48 0x00007f5747270401 in KWin::Effect::paintScreen(int, QRegion, KWin::ScreenPaintData&) () at /usr/lib/x86_64-linux-gnu/libkwineffects.so.11
#49 0x00007f574a26947d in KWin::EffectsHandlerImpl::paintScreen(int, QRegion, KWin::ScreenPaintData&) () at /usr/lib/x86_64-linux-gnu/libkwin.so.5
#50 0x00007f5746fd33d7 in  () at /usr/lib/x86_64-linux-gnu/libkwin4_effect_builtins.so.1
#51 0x00007f574a26947d in KWin::EffectsHandlerImpl::paintScreen(int, QRegion, KWin::ScreenPaintData&) () at /usr/lib/x86_64-linux-gnu/libkwin.so.5
#52 0x00007f574a25ae5e in KWin::Scene::paintScreen(int*, QRegion const&, QRegion const&, QRegion*, QRegion*, QMatrix4x4 const&, QRect const&) () at /usr/lib/x86_64-linux-gnu/libkwin.so.5
#53 0x00007f57227ad541 in KWin::SceneOpenGL::paint(QRegion, QList<KWin::Toplevel*>) () at /usr/lib/x86_64-linux-gnu/qt5/plugins/org.kde.kwin.scenes/KWinSceneOpenGL.so
#54 0x00007f574a24d3e2 in KWin::Compositor::performCompositing() () at /usr/lib/x86_64-linux-gnu/libkwin.so.5
#55 0x00007f5747ad70db in QObject::event(QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#56 0x00007f574882582c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#57 0x00007f574882d0f4 in QApplication::notify(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#58 0x00007f5747aa79a8 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#59 0x00007f5747affd8e in QTimerInfoList::activateTimers() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#60 0x00007f5747afdf42 in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#61 0x00007f5731c6a5cd in  () at /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#62 0x00007f5747aa59ea in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#63 0x00007f5747aaea84 in QCoreApplication::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#64 0x00007f574a9dfdbb in kdemain () at /usr/lib/x86_64-linux-gnu/libkdeinit5_kwin_x11.so
#65 0x00007f574a607b97 in __libc_start_main (main=0x55bfe40a5730, argc=3, argv=0x7fffe1168d08, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fffe1168cf8) at ../csu/libc-start.c:310
#66 0x000055bfe40a576a in _start ()

Reported using DrKonqi