Bug 403673

Application: kwin_x11 (5.14.5)

Qt Version: 5.11.1
Frameworks Version: 5.52.0
Operating System: Linux 4.18.0-13-generic x86_64
Distribution: Ubuntu 18.10

-- Information about the crash:
- What I was doing when the application crashed:
I woke up the computer from sleep, and I got a notification that KWin crashed.  As of right now, everything is fine, but I feel that I should submit this just in case it'll help improve it.

-- Backtrace:
Application: KWin (kwin_x11), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f6915160840 (LWP 2466))]

Thread 8 (Thread 0x7f69008af700 (LWP 28298)):
#0  0x00007f691f6472eb in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x559421619740) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f691f6472eb in __pthread_cond_wait_common (abstime=0x0, mutex=0x5594216196f0, cond=0x559421619718) at pthread_cond_wait.c:502
#2  0x00007f691f6472eb in __pthread_cond_wait (cond=0x559421619718, mutex=0x5594216196f0) at pthread_cond_wait.c:655
#3  0x00007f691e10d43b in QWaitCondition::wait(QMutex*, unsigned long) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f691ca8d279 in  () at /lib/x86_64-linux-gnu/libQt5Quick.so.5
#5  0x00007f691ca8d4da in  () at /lib/x86_64-linux-gnu/libQt5Quick.so.5
#6  0x00007f691e10cc87 in  () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f691f641164 in start_thread (arg=<optimized out>) at pthread_create.c:486
#8  0x00007f691f77adef in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 7 (Thread 0x7f6903bff700 (LWP 28297)):
#0  0x00007f691f76e7d6 in __GI_ppoll (fds=0x7f68f80129b8, nfds=1, timeout=<optimized out>, sigmask=0x0) at ../sysdeps/unix/sysv/linux/ppoll.c:39
#1  0x00007f691e303141 in qt_safe_poll(pollfd*, unsigned long, timespec const*) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x00007f691e3045b9 in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#3  0x00007f691e2b416b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f691e1030b6 in QThread::exec() () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f691c7581f5 in  () at /lib/x86_64-linux-gnu/libQt5Qml.so.5
#6  0x00007f691e10cc87 in  () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f691f641164 in start_thread (arg=<optimized out>) at pthread_create.c:486
#8  0x00007f691f77adef in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 6 (Thread 0x7f6911a4a700 (LWP 4708)):
#0  0x00007f691f6472eb in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55942119f0a0) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f691f6472eb in __pthread_cond_wait_common (abstime=0x0, mutex=0x55942119f050, cond=0x55942119f078) at pthread_cond_wait.c:502
#2  0x00007f691f6472eb in __pthread_cond_wait (cond=0x55942119f078, mutex=0x55942119f050) at pthread_cond_wait.c:655
#3  0x00007f691e10d43b in QWaitCondition::wait(QMutex*, unsigned long) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f691ca8d279 in  () at /lib/x86_64-linux-gnu/libQt5Quick.so.5
#5  0x00007f691ca8d4da in  () at /lib/x86_64-linux-gnu/libQt5Quick.so.5
#6  0x00007f691e10cc87 in  () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f691f641164 in start_thread (arg=<optimized out>) at pthread_create.c:486
#8  0x00007f691f77adef in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 5 (Thread 0x7f68f702b700 (LWP 2739)):
#0  0x00007f691f6472eb in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x7f691dcf3fb8) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f691f6472eb in __pthread_cond_wait_common (abstime=0x0, mutex=0x7f691dcf3f68, cond=0x7f691dcf3f90) at pthread_cond_wait.c:502
#2  0x00007f691f6472eb in __pthread_cond_wait (cond=0x7f691dcf3f90, mutex=0x7f691dcf3f68) at pthread_cond_wait.c:655
#3  0x00007f691dbfce2a in  () at /lib/x86_64-linux-gnu/libQt5Script.so.5
#4  0x00007f691dbfce49 in  () at /lib/x86_64-linux-gnu/libQt5Script.so.5
#5  0x00007f691f641164 in start_thread (arg=<optimized out>) at pthread_create.c:486
#6  0x00007f691f77adef in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 4 (Thread 0x7f691108d700 (LWP 2652)):
#0  0x00007f691f76e7d6 in __GI_ppoll (fds=0x7f68fc000d28, nfds=1, timeout=<optimized out>, sigmask=0x0) at ../sysdeps/unix/sysv/linux/ppoll.c:39
#1  0x00007f691e303141 in qt_safe_poll(pollfd*, unsigned long, timespec const*) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x00007f691e3045b9 in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#3  0x00007f691e2b416b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f691e1030b6 in QThread::exec() () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f691c7581f5 in  () at /lib/x86_64-linux-gnu/libQt5Qml.so.5
#6  0x00007f691e10cc87 in  () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f691f641164 in start_thread (arg=<optimized out>) at pthread_create.c:486
#8  0x00007f691f77adef in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 3 (Thread 0x7f6912efa700 (LWP 2490)):
#0  0x00007f691f76e7d6 in __GI_ppoll (fds=0x7f690400b878, nfds=1, timeout=<optimized out>, sigmask=0x0) at ../sysdeps/unix/sysv/linux/ppoll.c:39
#1  0x00007f691e303141 in qt_safe_poll(pollfd*, unsigned long, timespec const*) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x00007f691e3045b9 in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#3  0x00007f691e2b416b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f691e1030b6 in QThread::exec() () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f691c233545 in  () at /lib/x86_64-linux-gnu/libQt5DBus.so.5
#6  0x00007f691e10cc87 in  () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f691f641164 in start_thread (arg=<optimized out>) at pthread_create.c:486
#8  0x00007f691f77adef in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 2 (Thread 0x7f69141a6700 (LWP 2474)):
#0  0x00007f691f76e6d9 in __GI___poll (fds=0x7f69141a5c78, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f691e02c917 in  () at /lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007f691e02e53a in xcb_wait_for_event () at /lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007f6914688159 in  () at /lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#4  0x00007f691e10cc87 in  () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f691f641164 in start_thread (arg=<optimized out>) at pthread_create.c:486
#6  0x00007f691f77adef in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 1 (Thread 0x7f6915160840 (LWP 2466)):
[KCrash Handler]
#6  0x00007f691de73c0b in KWin::WindowQuadList::makeInterleavedArrays(unsigned int, KWin::GLVertex2D*, QMatrix4x4 const&) const () at /lib/x86_64-linux-gnu/libkwineffects.so.11
#7  0x00007f6910234f42 in  () at /usr/lib/x86_64-linux-gnu/qt5/plugins/org.kde.kwin.scenes/KWinSceneOpenGL.so
#8  0x00007f691023e209 in  () at /usr/lib/x86_64-linux-gnu/qt5/plugins/org.kde.kwin.scenes/KWinSceneOpenGL.so
#9  0x00007f691023e337 in  () at /usr/lib/x86_64-linux-gnu/qt5/plugins/org.kde.kwin.scenes/KWinSceneOpenGL.so
#10 0x00007f691f4bbb93 in KWin::EffectsHandlerImpl::drawWindow(KWin::EffectWindow*, int, QRegion, KWin::WindowPaintData&) () at /lib/x86_64-linux-gnu/libkwin.so.5
#11 0x00007f691de6fd6c in KWin::Effect::drawWindow(KWin::EffectWindow*, int, QRegion, KWin::WindowPaintData&) () at /lib/x86_64-linux-gnu/libkwineffects.so.11
#12 0x00007f691f4bbb33 in KWin::EffectsHandlerImpl::drawWindow(KWin::EffectWindow*, int, QRegion, KWin::WindowPaintData&) () at /lib/x86_64-linux-gnu/libkwin.so.5
#13 0x00007f691de0a9d5 in  () at /lib/x86_64-linux-gnu/libkwin4_effect_builtins.so.1
#14 0x00007f691f4bbb33 in KWin::EffectsHandlerImpl::drawWindow(KWin::EffectWindow*, int, QRegion, KWin::WindowPaintData&) () at /lib/x86_64-linux-gnu/libkwin.so.5
#15 0x00007f691dd7a339 in  () at /lib/x86_64-linux-gnu/libkwin4_effect_builtins.so.1
#16 0x00007f691f4bbb33 in KWin::EffectsHandlerImpl::drawWindow(KWin::EffectWindow*, int, QRegion, KWin::WindowPaintData&) () at /lib/x86_64-linux-gnu/libkwin.so.5
#17 0x00007f691de6fd6c in KWin::Effect::drawWindow(KWin::EffectWindow*, int, QRegion, KWin::WindowPaintData&) () at /lib/x86_64-linux-gnu/libkwineffects.so.11
#18 0x00007f691f4bbb33 in KWin::EffectsHandlerImpl::drawWindow(KWin::EffectWindow*, int, QRegion, KWin::WindowPaintData&) () at /lib/x86_64-linux-gnu/libkwin.so.5
#19 0x00007f691f4a81cc in KWin::Scene::finalPaintWindow(KWin::EffectWindowImpl*, int, QRegion, KWin::WindowPaintData&) () at /lib/x86_64-linux-gnu/libkwin.so.5
#20 0x00007f691f4bb9cb in KWin::EffectsHandlerImpl::paintWindow(KWin::EffectWindow*, int, QRegion, KWin::WindowPaintData&) () at /lib/x86_64-linux-gnu/libkwin.so.5
#21 0x00007f691ddfb93a in  () at /lib/x86_64-linux-gnu/libkwin4_effect_builtins.so.1
#22 0x00007f691f4bb973 in KWin::EffectsHandlerImpl::paintWindow(KWin::EffectWindow*, int, QRegion, KWin::WindowPaintData&) () at /lib/x86_64-linux-gnu/libkwin.so.5
#23 0x00007f691de6fbfc in KWin::Effect::paintWindow(KWin::EffectWindow*, int, QRegion, KWin::WindowPaintData&) () at /lib/x86_64-linux-gnu/libkwineffects.so.11
#24 0x00007f691f4bb973 in KWin::EffectsHandlerImpl::paintWindow(KWin::EffectWindow*, int, QRegion, KWin::WindowPaintData&) () at /lib/x86_64-linux-gnu/libkwin.so.5
#25 0x00007f691de6fbfc in KWin::Effect::paintWindow(KWin::EffectWindow*, int, QRegion, KWin::WindowPaintData&) () at /lib/x86_64-linux-gnu/libkwineffects.so.11
#26 0x00007f691f4bb973 in KWin::EffectsHandlerImpl::paintWindow(KWin::EffectWindow*, int, QRegion, KWin::WindowPaintData&) () at /lib/x86_64-linux-gnu/libkwin.so.5
#27 0x00007f691de7d12b in KWin::AnimationEffect::paintWindow(KWin::EffectWindow*, int, QRegion, KWin::WindowPaintData&) () at /lib/x86_64-linux-gnu/libkwineffects.so.11
#28 0x00007f691f4bb973 in KWin::EffectsHandlerImpl::paintWindow(KWin::EffectWindow*, int, QRegion, KWin::WindowPaintData&) () at /lib/x86_64-linux-gnu/libkwin.so.5
#29 0x00007f691f4ae55e in KWin::Scene::paintWindow(KWin::Scene::Window*, int, QRegion, KWin::WindowQuadList) () at /lib/x86_64-linux-gnu/libkwin.so.5
#30 0x00007f691f4aad0c in KWin::Scene::paintSimpleScreen(int, QRegion) () at /lib/x86_64-linux-gnu/libkwin.so.5
#31 0x00007f69102307d2 in  () at /usr/lib/x86_64-linux-gnu/qt5/plugins/org.kde.kwin.scenes/KWinSceneOpenGL.so
#32 0x00007f691f4adb30 in KWin::Scene::finalPaintScreen(int, QRegion, KWin::ScreenPaintData&) () at /lib/x86_64-linux-gnu/libkwin.so.5
#33 0x00007f691f4bb725 in KWin::EffectsHandlerImpl::paintScreen(int, QRegion, KWin::ScreenPaintData&) () at /lib/x86_64-linux-gnu/libkwin.so.5
#34 0x00007f691de6fb51 in KWin::Effect::paintScreen(int, QRegion, KWin::ScreenPaintData&) () at /lib/x86_64-linux-gnu/libkwineffects.so.11
#35 0x00007f691f4bb6cd in KWin::EffectsHandlerImpl::paintScreen(int, QRegion, KWin::ScreenPaintData&) () at /lib/x86_64-linux-gnu/libkwin.so.5
#36 0x00007f691de6fb51 in KWin::Effect::paintScreen(int, QRegion, KWin::ScreenPaintData&) () at /lib/x86_64-linux-gnu/libkwineffects.so.11
#37 0x00007f691f4bb6cd in KWin::EffectsHandlerImpl::paintScreen(int, QRegion, KWin::ScreenPaintData&) () at /lib/x86_64-linux-gnu/libkwin.so.5
#38 0x00007f691de6fb51 in KWin::Effect::paintScreen(int, QRegion, KWin::ScreenPaintData&) () at /lib/x86_64-linux-gnu/libkwineffects.so.11
#39 0x00007f691f4bb6cd in KWin::EffectsHandlerImpl::paintScreen(int, QRegion, KWin::ScreenPaintData&) () at /lib/x86_64-linux-gnu/libkwin.so.5
#40 0x00007f691de6fb51 in KWin::Effect::paintScreen(int, QRegion, KWin::ScreenPaintData&) () at /lib/x86_64-linux-gnu/libkwineffects.so.11
#41 0x00007f691f4bb6cd in KWin::EffectsHandlerImpl::paintScreen(int, QRegion, KWin::ScreenPaintData&) () at /lib/x86_64-linux-gnu/libkwin.so.5
#42 0x00007f691f4ad7de in KWin::Scene::paintScreen(int*, QRegion const&, QRegion const&, QRegion*, QRegion*, QMatrix4x4 const&, QRect const&) () at /lib/x86_64-linux-gnu/libkwin.so.5
#43 0x00007f6910238676 in KWin::SceneOpenGL::paint(QRegion, QList<KWin::Toplevel*>) () at /usr/lib/x86_64-linux-gnu/qt5/plugins/org.kde.kwin.scenes/KWinSceneOpenGL.so
#44 0x00007f691f49f5fa in KWin::Compositor::performCompositing() () at /lib/x86_64-linux-gnu/libkwin.so.5
#45 0x00007f691e2def4b in QObject::event(QEvent*) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#46 0x00007f691ec744a1 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#47 0x00007f691ec7bae0 in QApplication::notify(QObject*, QEvent*) () at /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#48 0x00007f691e2b5499 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#49 0x00007f691e306558 in QTimerInfoList::activateTimers() () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#50 0x00007f691e30470c in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#51 0x00007f691471a0ed in  () at /lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#52 0x00007f691e2b416b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#53 0x00007f691e2bc2e2 in QCoreApplication::exec() () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#54 0x00007f691f85447b in kdemain () at /lib/x86_64-linux-gnu/libkdeinit5_kwin_x11.so
#55 0x00007f691f68409b in __libc_start_main (main=0x55941f140050, argc=1, argv=0x7ffc1c000cd8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffc1c000cc8) at ../csu/libc-start.c:308
#56 0x000055941f14008a in _start ()
[Inferior 1 (process 2466) detached]

Reported using DrKonqi