Application: kwin_x11 (5.4.1)

Qt Version: 5.5.0
Operating System: Linux 4.2.1-1-desktop x86_64
Distribution: "openSUSE Tumbleweed (20151017) (x86_64)"

-- Information about the crash:
I shutdown google-chrome, then restarted it from krunner. kwin_x11 crashed, the loging window background appeared twice, then kwin_x11 restarted successfully.

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 0x7f74c3e87940 (LWP 2374))]

Thread 4 (Thread 0x7f74a136c700 (LWP 2385)):
#0  0x00007f74c35f7843 in select () at /lib64/libc.so.6
#1  0x00007f74c166dc6f in qt_safe_select(int, fd_set*, fd_set*, fd_set*, timespec const*) (nfds=14, fdread=fdread@entry=0x7f7494000a98, fdwrite=fdwrite@entry=0x7f7494000d28, fdexcept=fdexcept@entry=0x7f7494000fb8, orig_timeout=orig_timeout@entry=0x0) at kernel/qcore_unix.cpp:75
#2  0x00007f74c166f64b in QEventDispatcherUNIXPrivate::doSelect(QFlags<QEventLoop::ProcessEventsFlag>, timespec*) (timeout=0x0, exceptfds=0x7f7494000fb8, writefds=0x7f7494000d28, readfds=0x7f7494000a98, nfds=<optimized out>, this=0x7f74940008e0) at kernel/qeventdispatcher_unix.cpp:320
#3  0x00007f74c166f64b in QEventDispatcherUNIXPrivate::doSelect(QFlags<QEventLoop::ProcessEventsFlag>, timespec*) (this=this@entry=0x7f7494000900, flags=..., flags@entry=..., timeout=timeout@entry=0x0) at kernel/qeventdispatcher_unix.cpp:196
#4  0x00007f74c166fb46 in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7f74940008e0, flags=...) at kernel/qeventdispatcher_unix.cpp:607
#5  0x00007f74c161c47a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7f74a136bc70, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#6  0x00007f74c1448c6c in QThread::exec() (this=<optimized out>) at thread/qthread.cpp:503
#7  0x00007f74bb71a1a5 in  () at /usr/lib64/libQt5Qml.so.5
#8  0x00007f74c144da9f in QThreadPrivate::start(void*) (arg=0x2788410) at thread/qthread_unix.cpp:331
#9  0x00007f74c38c44a4 in start_thread () at /lib64/libpthread.so.0
#10 0x00007f74c35feb5d in clone () at /lib64/libc.so.6

Thread 3 (Thread 0x7f749b3db700 (LWP 2426)):
#0  0x00007f74c38ca07f in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007f74c03c4aa4 in  () at /usr/lib64/libQt5Script.so.5
#2  0x00007f74c03c4ae9 in  () at /usr/lib64/libQt5Script.so.5
#3  0x00007f74c38c44a4 in start_thread () at /lib64/libpthread.so.0
#4  0x00007f74c35feb5d in clone () at /lib64/libc.so.6

Thread 2 (Thread 0x7f740846c700 (LWP 2437)):
#0  0x00007f74c35f7843 in select () at /lib64/libc.so.6
#1  0x00007f74c166dc6f in qt_safe_select(int, fd_set*, fd_set*, fd_set*, timespec const*) (nfds=27, fdread=fdread@entry=0x7f7400000a78, fdwrite=fdwrite@entry=0x7f7400000d08, fdexcept=fdexcept@entry=0x7f7400000f98, orig_timeout=orig_timeout@entry=0x0) at kernel/qcore_unix.cpp:75
#2  0x00007f74c166f64b in QEventDispatcherUNIXPrivate::doSelect(QFlags<QEventLoop::ProcessEventsFlag>, timespec*) (timeout=0x0, exceptfds=0x7f7400000f98, writefds=0x7f7400000d08, readfds=0x7f7400000a78, nfds=<optimized out>, this=0x7f74000008c0) at kernel/qeventdispatcher_unix.cpp:320
#3  0x00007f74c166f64b in QEventDispatcherUNIXPrivate::doSelect(QFlags<QEventLoop::ProcessEventsFlag>, timespec*) (this=this@entry=0x7f74000008e0, flags=..., flags@entry=..., timeout=timeout@entry=0x0) at kernel/qeventdispatcher_unix.cpp:196
#4  0x00007f74c166fb46 in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7f74000008c0, flags=...) at kernel/qeventdispatcher_unix.cpp:607
#5  0x00007f74c161c47a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7f740846bc70, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#6  0x00007f74c1448c6c in QThread::exec() (this=<optimized out>) at thread/qthread.cpp:503
#7  0x00007f74bb71a1a5 in  () at /usr/lib64/libQt5Qml.so.5
#8  0x00007f74c144da9f in QThreadPrivate::start(void*) (arg=0x2d2c7e0) at thread/qthread_unix.cpp:331
#9  0x00007f74c38c44a4 in start_thread () at /lib64/libpthread.so.0
#10 0x00007f74c35feb5d in clone () at /lib64/libc.so.6

Thread 1 (Thread 0x7f74c3e87940 (LWP 2374)):
[KCrash Handler]
#6  0x000000004004e83b in  ()
#7  0x00007f74b2a3ae74 in  () at /usr/lib64/libnvidia-glcore.so.355.11
#8  0x00007f74b2a41b08 in  () at /usr/lib64/libnvidia-glcore.so.355.11
#9  0x00007f74b26450e8 in  () at /usr/lib64/libnvidia-glcore.so.355.11
#10 0x00007f74c1e6a906 in QOpenGLTextureGlyphCache::resizeTextureData(int, int) (count=4, first=0, mode=6, this=0x19dac770) at ../../src/gui/opengl/qopenglfunctions.h:716
#11 0x00007f74c1e6a906 in QOpenGLTextureGlyphCache::resizeTextureData(int, int) (this=0x73d1770, width=<optimized out>, height=<optimized out>) at opengl/qopengltextureglyphcache.cpp:299
#12 0x00007f74c1dfb15a in QTextureGlyphCache::fillInPendingGlyphs() (height=<optimized out>, width=<optimized out>, this=0x73d1770) at painting/qtextureglyphcache_p.h:124
#13 0x00007f74c1dfb15a in QTextureGlyphCache::fillInPendingGlyphs() (this=0x73d1770) at painting/qtextureglyphcache.cpp:233
#14 0x00007f74bbde564a in  () at /usr/lib64/libQt5Quick.so.5
#15 0x00007f74bbde37a9 in  () at /usr/lib64/libQt5Quick.so.5
#16 0x00007f74bbe6740b in  () at /usr/lib64/libQt5Quick.so.5
#17 0x00007f74bbe6b637 in  () at /usr/lib64/libQt5Quick.so.5
#18 0x00007f74bbe68267 in  () at /usr/lib64/libQt5Quick.so.5
#19 0x00007f74bbe66a99 in QQuickText::updatePaintNode(QSGNode*, QQuickItem::UpdatePaintNodeData*) () at /usr/lib64/libQt5Quick.so.5
#20 0x00007f74bbe27e30 in QQuickWindowPrivate::updateDirtyNode(QQuickItem*) () at /usr/lib64/libQt5Quick.so.5
#21 0x00007f74bbe28678 in QQuickWindowPrivate::updateDirtyNodes() () at /usr/lib64/libQt5Quick.so.5
#22 0x00007f74bbe287c0 in QQuickWindowPrivate::syncSceneGraph() () at /usr/lib64/libQt5Quick.so.5
#23 0x00007f74bbeffb6a in QQuickRenderControl::sync() () at /usr/lib64/libQt5Quick.so.5
#24 0x00007f74a138a769 in  () at /usr/lib64/qt5/plugins/org.kde.kdecoration2/kwin5_aurorae.so
#25 0x00007f74c164bc27 in QMetaObject::activate(QObject*, int, int, void**) (a=0x7ffc53598bb0, r=0x25b79210, this=<optimized out>) at ../../src/corelib/kernel/qobject_impl.h:124
#26 0x00007f74c164bc27 in QMetaObject::activate(QObject*, int, int, void**) (sender=sender@entry=0x20193bb0, signalOffset=<optimized out>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x0) at kernel/qobject.cpp:3703
#27 0x00007f74c164c597 in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) (sender=sender@entry=0x20193bb0, m=m@entry=0x7f74c1a628c0 <QTimer::staticMetaObject>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x0) at kernel/qobject.cpp:3583
#28 0x00007f74c16c6be0 in QTimer::timeout(QTimer::QPrivateSignal) (this=this@entry=0x20193bb0) at .moc/moc_qtimer.cpp:197
#29 0x00007f74c1657f18 in QTimer::timerEvent(QTimerEvent*) (this=0x20193bb0, e=<optimized out>) at kernel/qtimer.cpp:247
#30 0x00007f74c164cb3b in QObject::event(QEvent*) (this=0x20193bb0, e=<optimized out>) at kernel/qobject.cpp:1268
#31 0x00007f74c230e8fc in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib64/libQt5Widgets.so.5
#32 0x00007f74c2313a06 in QApplication::notify(QObject*, QEvent*) () at /usr/lib64/libQt5Widgets.so.5
#33 0x00007f74c161eb33 in QCoreApplication::notifyInternal(QObject*, QEvent*) (this=0x7ffc53599120, receiver=0x20193bb0, event=event@entry=0x7ffc53598f20) at kernel/qcoreapplication.cpp:965
#34 0x00007f74c16711ed in QTimerInfoList::activateTimers() (event=0x7ffc53598f20, receiver=<optimized out>) at ../../src/corelib/kernel/qcoreapplication.h:224
#35 0x00007f74c16711ed in QTimerInfoList::activateTimers() (this=0x25cbff8) at kernel/qtimerinfo_unix.cpp:637
#36 0x00007f74c166f0d0 in QEventDispatcherUNIX::activateTimers() (this=this@entry=0x25ca2b0) at kernel/qeventdispatcher_unix.cpp:549
#37 0x00007f74c166fac6 in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x25ca2b0, flags=flags@entry=...) at kernel/qeventdispatcher_unix.cpp:611
#38 0x00007f74aa62b21d in QUnixEventDispatcherQPA::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=<optimized out>, flags=...) at eventdispatchers/qunixeventdispatcher.cpp:62
#39 0x00007f74c161c47a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7ffc53599050, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#40 0x00007f74c162411d in QCoreApplication::exec() () at kernel/qcoreapplication.cpp:1229
#41 0x00007f74c3ae2804 in kdemain () at /usr/lib64/libkdeinit5_kwin_x11.so
#42 0x00007f74c3535610 in __libc_start_main () at /lib64/libc.so.6
#43 0x0000000000400879 in _start ()

Reported using DrKonqi