Application: kwin_x11 (5.6.4)

Qt Version: 5.6.1
Frameworks Version: 5.23.0
Operating System: Linux 4.1.21-14-default x86_64
Distribution: "openSUSE Leap 42.1 (x86_64)"

-- Information about the crash:
- What I was doing when the application crashed:
My laptop boots up, Kwin starts i launch a few apps (kopete, dolphin, firefox) and (nerlay) 1 minute after that, kwin crashes and automatically restars itself.
No app closed, no data lost but is's quite strange and annoying.
This bug appears at least twice a week.

The crash can be reproduced sometimes.

-- Backtrace:
Application: KWin (kwin_x11), signal: Segmentation fault
Using host libthread_db library "/lib64/libthread_db.so.1".
[Current thread is 1 (Thread 0x7fce540b9800 (LWP 2355))]

Thread 7 (Thread 0x7fce32d39700 (LWP 2373)):
#0  0x00007fce53a37253 in select () at /lib64/libc.so.6
#1  0x00007fce51833839 in qt_safe_select(int, fd_set*, fd_set*, fd_set*, timespec const*) () at /usr/lib64/libQt5Core.so.5
#2  0x00007fce51835105 in QEventDispatcherUNIXPrivate::doSelect(QFlags<QEventLoop::ProcessEventsFlag>, timespec*) () at /usr/lib64/libQt5Core.so.5
#3  0x00007fce51835547 in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#4  0x00007fce517e4fcb in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#5  0x00007fce5161ff5a in QThread::exec() () at /usr/lib64/libQt5Core.so.5
#6  0x00007fce4a649225 in  () at /usr/lib64/libQt5DBus.so.5
#7  0x00007fce51624a29 in  () at /usr/lib64/libQt5Core.so.5
#8  0x00007fce530500a4 in start_thread () at /lib64/libpthread.so.0
#9  0x00007fce53a3dfed in clone () at /lib64/libc.so.6

Thread 6 (Thread 0x7fce30f5b700 (LWP 2378)):
#0  0x00007fce53a37253 in select () at /lib64/libc.so.6
#1  0x00007fce51833839 in qt_safe_select(int, fd_set*, fd_set*, fd_set*, timespec const*) () at /usr/lib64/libQt5Core.so.5
#2  0x00007fce51835105 in QEventDispatcherUNIXPrivate::doSelect(QFlags<QEventLoop::ProcessEventsFlag>, timespec*) () at /usr/lib64/libQt5Core.so.5
#3  0x00007fce51835547 in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#4  0x00007fce517e4fcb in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#5  0x00007fce5161ff5a in QThread::exec() () at /usr/lib64/libQt5Core.so.5
#6  0x00007fce4b6c2b78 in  () at /usr/lib64/libQt5Qml.so.5
#7  0x00007fce51624a29 in  () at /usr/lib64/libQt5Core.so.5
#8  0x00007fce530500a4 in start_thread () at /lib64/libpthread.so.0
#9  0x00007fce53a3dfed in clone () at /lib64/libc.so.6

Thread 5 (Thread 0x7fce20af2700 (LWP 2402)):
#0  0x00007fce5305403f in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007fce5059b97b in  () at /usr/lib64/libQt5Script.so.5
#2  0x00007fce5059b9a9 in  () at /usr/lib64/libQt5Script.so.5
#3  0x00007fce530500a4 in start_thread () at /lib64/libpthread.so.0
#4  0x00007fce53a3dfed in clone () at /lib64/libc.so.6

Thread 4 (Thread 0x7fcd8ebfb700 (LWP 2526)):
#0  0x00007fce53a37253 in select () at /lib64/libc.so.6
#1  0x00007fce51833839 in qt_safe_select(int, fd_set*, fd_set*, fd_set*, timespec const*) () at /usr/lib64/libQt5Core.so.5
#2  0x00007fce51835105 in QEventDispatcherUNIXPrivate::doSelect(QFlags<QEventLoop::ProcessEventsFlag>, timespec*) () at /usr/lib64/libQt5Core.so.5
#3  0x00007fce51835547 in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#4  0x00007fce517e4fcb in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#5  0x00007fce5161ff5a in QThread::exec() () at /usr/lib64/libQt5Core.so.5
#6  0x00007fce4b6c2b78 in  () at /usr/lib64/libQt5Qml.so.5
#7  0x00007fce51624a29 in  () at /usr/lib64/libQt5Core.so.5
#8  0x00007fce530500a4 in start_thread () at /lib64/libpthread.so.0
#9  0x00007fce53a3dfed in clone () at /lib64/libc.so.6

Thread 3 (Thread 0x7fce31b28700 (LWP 4228)):
#0  0x00007fce5305403f in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007fce5162569b in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib64/libQt5Core.so.5
#2  0x00007fce4bd9754b in  () at /usr/lib64/libQt5Quick.so.5
#3  0x00007fce4bd979f5 in  () at /usr/lib64/libQt5Quick.so.5
#4  0x00007fce51624a29 in  () at /usr/lib64/libQt5Core.so.5
#5  0x00007fce530500a4 in start_thread () at /lib64/libpthread.so.0
#6  0x00007fce53a3dfed in clone () at /lib64/libc.so.6

Thread 2 (Thread 0x7fce236ff700 (LWP 4659)):
#0  0x00007fce5305403f in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007fce5162569b in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib64/libQt5Core.so.5
#2  0x00007fce4bd9754b in  () at /usr/lib64/libQt5Quick.so.5
#3  0x00007fce4bd979f5 in  () at /usr/lib64/libQt5Quick.so.5
#4  0x00007fce51624a29 in  () at /usr/lib64/libQt5Core.so.5
#5  0x00007fce530500a4 in start_thread () at /lib64/libpthread.so.0
#6  0x00007fce53a3dfed in clone () at /lib64/libc.so.6

Thread 1 (Thread 0x7fce540b9800 (LWP 2355)):
[KCrash Handler]
#6  0x000000004174493b in  ()
#7  0x00007fce42082632 in  () at /usr/lib64/libnvidia-glcore.so.340.96
#8  0x00007fce420839af in  () at /usr/lib64/libnvidia-glcore.so.340.96
#9  0x00007fce421b2521 in  () at /usr/lib64/libnvidia-glcore.so.340.96
#10 0x00007fce41d5ec1a in  () at /usr/lib64/libnvidia-glcore.so.340.96
#11 0x00007fce421b26fd in  () at /usr/lib64/libnvidia-glcore.so.340.96
#12 0x00007fce41d5ec1a in  () at /usr/lib64/libnvidia-glcore.so.340.96
#13 0x00007fce421b271a in  () at /usr/lib64/libnvidia-glcore.so.340.96
#14 0x00007fce52042c3a in QOpenGLTextureGlyphCache::resizeTextureData(int, int) () at /usr/lib64/libQt5Gui.so.5
#15 0x00007fce51fb70e0 in QTextureGlyphCache::fillInPendingGlyphs() () at /usr/lib64/libQt5Gui.so.5
#16 0x00007fce4bd82d33 in  () at /usr/lib64/libQt5Quick.so.5
#17 0x00007fce4bd80dad in  () at /usr/lib64/libQt5Quick.so.5
#18 0x00007fce4be01e5b in  () at /usr/lib64/libQt5Quick.so.5
#19 0x00007fce4be07ed7 in  () at /usr/lib64/libQt5Quick.so.5
#20 0x00007fce4be02648 in  () at /usr/lib64/libQt5Quick.so.5
#21 0x00007fce4be01817 in QQuickText::updatePaintNode(QSGNode*, QQuickItem::UpdatePaintNodeData*) () at /usr/lib64/libQt5Quick.so.5
#22 0x00007fce4bdc1cb7 in QQuickWindowPrivate::updateDirtyNode(QQuickItem*) () at /usr/lib64/libQt5Quick.so.5
#23 0x00007fce4bdc282a in QQuickWindowPrivate::updateDirtyNodes() () at /usr/lib64/libQt5Quick.so.5
#24 0x00007fce4bdc3780 in QQuickWindowPrivate::syncSceneGraph() () at /usr/lib64/libQt5Quick.so.5
#25 0x00007fce4bea359c in QQuickRenderControl::sync() () at /usr/lib64/libQt5Quick.so.5
#26 0x00007fce30f9f946 in  () at /usr/lib64/qt5/plugins/org.kde.kdecoration2/kwin5_aurorae.so
#27 0x00007fce518111b3 in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib64/libQt5Core.so.5
#28 0x00007fce5181e102 in QTimer::timerEvent(QTimerEvent*) () at /usr/lib64/libQt5Core.so.5
#29 0x00007fce51811f24 in QObject::event(QEvent*) () at /usr/lib64/libQt5Core.so.5
#30 0x00007fce524ede9c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib64/libQt5Widgets.so.5
#31 0x00007fce524f24fa in QApplication::notify(QObject*, QEvent*) () at /usr/lib64/libQt5Widgets.so.5
#32 0x00007fce517e6fb5 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib64/libQt5Core.so.5
#33 0x00007fce51836c9e in QTimerInfoList::activateTimers() () at /usr/lib64/libQt5Core.so.5
#34 0x00007fce518355e8 in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#35 0x00007fce39ecb1dd in  () at /usr/lib64/libQt5XcbQpa.so.5
#36 0x00007fce517e4fcb in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#37 0x00007fce517eceb6 in QCoreApplication::exec() () at /usr/lib64/libQt5Core.so.5
#38 0x00007fce53d06d5a in kdemain () at /usr/lib64/libkdeinit5_kwin_x11.so
#39 0x00007fce5397ab05 in __libc_start_main () at /lib64/libc.so.6
#40 0x00000000004007fe in _start ()

Reported using DrKonqi