Application: kwin_x11 (5.8.7)

Qt Version: 5.7.1
Frameworks Version: 5.28.0
Operating System: Linux 4.11.0-2-amd64 x86_64
Distribution: Debian GNU/Linux unstable (sid)

-- Information about the crash:
- What I was doing when the application crashed:
I was connecting to a web page using Konqueror.
- Unusual behavior I noticed:
For some reason sometimes Konqueror causes KWin to crash in certain conditions like accessing a web page, but it does not always crash.

The crash can be reproduced sometimes.

-- 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 0x7f5e87f98300 (LWP 1831))]

Thread 6 (Thread 0x7f5e6bfff700 (LWP 8949)):
#0  0x00007f5ea16a4731 in __GI_ppoll (fds=0x7f5e64000a58, nfds=1, timeout=<optimized out>, sigmask=0x0) at ../sysdeps/unix/sysv/linux/ppoll.c:39
#1  0x00007f5e9f58e701 in qt_safe_poll(pollfd*, unsigned long, timespec const*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x00007f5e9f58fffa in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#3  0x00007f5e9f53d83a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f5e9f36df73 in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f5e9a3146a5 in  () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#6  0x00007f5e9f372c28 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f5e9b3dd494 in start_thread (arg=0x7f5e6bfff700) at pthread_create.c:333
#8  0x00007f5ea16adabf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:97

Thread 5 (Thread 0x7f5e6b014700 (LWP 1981)):
#0  0x00007f5e9b3e315f in pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f5e9e7092c4 in  () at /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#2  0x00007f5e9e709309 in  () at /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#3  0x00007f5e9b3dd494 in start_thread (arg=0x7f5e6b014700) at pthread_create.c:333
#4  0x00007f5ea16adabf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:97

Thread 4 (Thread 0x7f5e7e0f6700 (LWP 1969)):
#0  0x00007f5ea16a4731 in __GI_ppoll (fds=0x7f5e6c000ac8, nfds=1, timeout=<optimized out>, sigmask=0x0) at ../sysdeps/unix/sysv/linux/ppoll.c:39
#1  0x00007f5e9f58e701 in qt_safe_poll(pollfd*, unsigned long, timespec const*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x00007f5e9f58fffa in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#3  0x00007f5e9f53d83a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f5e9f36df73 in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f5e9a3146a5 in  () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#6  0x00007f5e9f372c28 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f5e9b3dd494 in start_thread (arg=0x7f5e7e0f6700) at pthread_create.c:333
#8  0x00007f5ea16adabf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:97

Thread 3 (Thread 0x7f5e84d27700 (LWP 1881)):
#0  0x00007f5e9f591605 in QTimerInfoList::timerWait(timespec&) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#1  0x00007f5e9f5902f4 in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x00007f5e9f53d83a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#3  0x00007f5e9f36df73 in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f5ea1caf305 in  () at /usr/lib/x86_64-linux-gnu/libQt5DBus.so.5
#5  0x00007f5e9f372c28 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f5e9b3dd494 in start_thread (arg=0x7f5e84d27700) at pthread_create.c:333
#7  0x00007f5ea16adabf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:97

Thread 2 (Thread 0x7f5e86cd2700 (LWP 1837)):
#0  0x00007f5ea16a466d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f5ea080f150 in  () at /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007f5ea0810ee9 in xcb_wait_for_event () at /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007f5e87badb89 in  () at /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#4  0x00007f5e9f372c28 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f5e9b3dd494 in start_thread (arg=0x7f5e86cd2700) at pthread_create.c:333
#6  0x00007f5ea16adabf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:97

Thread 1 (Thread 0x7f5e87f98300 (LWP 1831)):
[KCrash Handler]
#6  0x0000000040179b0f in  ()
#7  0x00007f5e918882d0 in  () at /usr/lib/x86_64-linux-gnu/libnvidia-glcore.so.340.102
#8  0x00007f5e9188f360 in  () at /usr/lib/x86_64-linux-gnu/libnvidia-glcore.so.340.102
#9  0x00007f5e914fc378 in  () at /usr/lib/x86_64-linux-gnu/libnvidia-glcore.so.340.102
#10 0x00007f5e9fb99344 in QOpenGLTextureGlyphCache::resizeTextureData(int, int) () at /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#11 0x00007f5e9fb3a936 in QTextureGlyphCache::fillInPendingGlyphs() () at /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#12 0x00007f5e9a7c7d37 in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#13 0x00007f5e9a7c5be4 in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#14 0x00007f5e9a84da97 in QQuickTextNode::addGlyphs(QPointF const&, QGlyphRun const&, QColor const&, QQuickText::TextStyle, QColor const&, QSGNode*) () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#15 0x00007f5e9a8527a4 in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#16 0x00007f5e9a84ea1c in QQuickTextNode::addTextLayout(QPointF const&, QTextLayout*, QColor const&, QQuickText::TextStyle, QColor const&, QColor const&, QColor const&, QColor const&, int, int, int, int) () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#17 0x00007f5e9a84d477 in QQuickText::updatePaintNode(QSGNode*, QQuickItem::UpdatePaintNodeData*) () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#18 0x00007f5e9a80a780 in QQuickWindowPrivate::updateDirtyNode(QQuickItem*) () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#19 0x00007f5e9a80af9b in QQuickWindowPrivate::updateDirtyNodes() () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#20 0x00007f5e9a80c00e in QQuickWindowPrivate::syncSceneGraph() () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#21 0x00007f5e9a8f06fa in QQuickRenderControl::sync() () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#22 0x00007f5e7e3580e0 in  () at /usr/lib/x86_64-linux-gnu/qt5/plugins/org.kde.kdecoration2/kwin5_aurorae.so
#23 0x00007f5e9f56b1ae in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#24 0x00007f5e9f5775f8 in QTimer::timerEvent(QTimerEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#25 0x00007f5e9f56bbfb in QObject::event(QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#26 0x00007f5e9fe1cbec in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#27 0x00007f5e9fe24381 in QApplication::notify(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#28 0x00007f5e9f53f850 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#29 0x00007f5e9f59235e in QTimerInfoList::activateTimers() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#30 0x00007f5e9f59026a in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#31 0x00007f5e87c2542d in  () at /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#32 0x00007f5e9f53d83a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#33 0x00007f5e9f545edc in QCoreApplication::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#34 0x00007f5ea196b1c6 in kdemain () at /usr/lib/x86_64-linux-gnu/libkdeinit5_kwin_x11.so
#35 0x00007f5ea15e52e1 in __libc_start_main (main=0xb20ef847f0, argc=1, argv=0x7ffc54b6a478, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffc54b6a468) at ../csu/libc-start.c:291
#36 0x000000b20ef8482a in _start ()

Reported using DrKonqi