Bug 372916

Application: kwin_x11 (5.8.3)

Qt Version: 5.6.2
Frameworks Version: 5.27.0
Operating System: Linux 4.8.10-desktop-3.mga6 x86_64
Distribution: "Mageia 6"

-- Information about the crash:
- What I was doing when the application crashed:
Normal work - browsing & emails

- Unusual behavior I noticed:
Systems appears to freeze up - but when I switch to console, it switches back to the Plasma session and shows me that kwin crashed

The crash can be reproduced every time.

-- Backtrace:
Application: KWin (kwin_x11), signal: Segmentation fault
Using host libthread_db library "/lib64/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f1e3fad3840 (LWP 14366))]

Thread 6 (Thread 0x7f1e1d650700 (LWP 12966)):
[KCrash Handler]
#6  0x00007f1e302e89f5 in  () at /usr/lib64/nvidia-current/libnvidia-glcore.so.375.20
#7  0x00007f1e306e2b16 in  () at /usr/lib64/nvidia-current/libnvidia-glcore.so.375.20
#8  0x00007f1e30818eb6 in  () at /usr/lib64/nvidia-current/libnvidia-glcore.so.375.20
#9  0x00007f1e3048ca9b in  () at /usr/lib64/nvidia-current/libnvidia-glcore.so.375.20
#10 0x00007f1e3044ee6c in  () at /usr/lib64/nvidia-current/libnvidia-glcore.so.375.20
#11 0x00007f1e3d7f0c8a in void (anonymous namespace)::Resolver<QOpenGLFunctionsPrivate, void (*)(unsigned int), 0, void>::operator()<unsigned int>(unsigned int) () at /lib64/libQt5Gui.so.5
#12 0x00007f1e3d7f0f7a in qopenglfResolveLinkProgram(unsigned int) () at /lib64/libQt5Gui.so.5
#13 0x00007f1e3d81dca5 in QOpenGLShaderProgram::link() () at /lib64/libQt5Gui.so.5
#14 0x00007f1e3d83cb27 in QOpenGLTextureGlyphCache::resizeTextureData(int, int) () at /lib64/libQt5Gui.so.5
#15 0x00007f1e3d7b6bca in QTextureGlyphCache::fillInPendingGlyphs() () at /lib64/libQt5Gui.so.5
#16 0x00007f1e388dceb0 in QSGTextMaskMaterial::populate(QPointF const&, QVector<unsigned int> const&, QVector<QPointF> const&, QSGGeometry*, QRectF*, QPointF*, QMargins const&) () at /lib64/libQt5Quick.so.5
#17 0x00007f1e388daf59 in QSGDefaultGlyphNode::update() () at /lib64/libQt5Quick.so.5
#18 0x00007f1e38959fcb in QQuickTextNode::addGlyphs(QPointF const&, QGlyphRun const&, QColor const&, QQuickText::TextStyle, QColor const&, QSGNode*) () at /lib64/libQt5Quick.so.5
#19 0x00007f1e3895ea7c in QQuickTextNodeEngine::addToSceneGraph(QQuickTextNode*, QQuickText::TextStyle, QColor const&) () at /lib64/libQt5Quick.so.5
#20 0x00007f1e3895aeef in QQuickTextNode::addTextLayout(QPointF const&, QTextLayout*, QColor const&, QQuickText::TextStyle, QColor const&, QColor const&, QColor const&, QColor const&, int, int, int, int) () at /lib64/libQt5Quick.so.5
#21 0x00007f1e389599ca in QQuickText::updatePaintNode(QSGNode*, QQuickItem::UpdatePaintNodeData*) () at /lib64/libQt5Quick.so.5
#22 0x00007f1e3891b730 in QQuickWindowPrivate::updateDirtyNode(QQuickItem*) () at /lib64/libQt5Quick.so.5
#23 0x00007f1e3891bf50 in QQuickWindowPrivate::updateDirtyNodes() () at /lib64/libQt5Quick.so.5
#24 0x00007f1e3891ceee in QQuickWindowPrivate::syncSceneGraph() () at /lib64/libQt5Quick.so.5
#25 0x00007f1e388ef6b5 in QSGRenderThread::sync(bool) () at /lib64/libQt5Quick.so.5
#26 0x00007f1e388f12c7 in QSGRenderThread::syncAndRender() () at /lib64/libQt5Quick.so.5
#27 0x00007f1e388f525c in QSGRenderThread::run() () at /lib64/libQt5Quick.so.5
#28 0x00007f1e3d00ef99 in QThreadPrivate::start(void*) () at /lib64/libQt5Core.so.5
#29 0x00007f1e3f68266d in start_thread () at /lib64/libpthread.so.0
#30 0x00007f1e3f3bdded in clone () at /lib64/libc.so.6

Thread 5 (Thread 0x7f1e1ce3f700 (LWP 14415)):
#0  0x00007f1e3f687c4f in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007f1e3c3b2234 in QTWTF::TCMalloc_PageHeap::scavengerThread() () at /lib64/libQt5Script.so.5
#2  0x00007f1e3c3b2279 in  () at /lib64/libQt5Script.so.5
#3  0x00007f1e3f68266d in start_thread () at /lib64/libpthread.so.0
#4  0x00007f1e3f3bdded in clone () at /lib64/libc.so.6

Thread 4 (Thread 0x7f1e1e6d1700 (LWP 14413)):
#0  0x00007f1e3f3b3dd3 in select () at /lib64/libc.so.6
#1  0x00007f1e3d2213af in qt_safe_select(int, fd_set*, fd_set*, fd_set*, timespec const*) () at /lib64/libQt5Core.so.5
#2  0x00007f1e3d222ccb in QEventDispatcherUNIXPrivate::doSelect(QFlags<QEventLoop::ProcessEventsFlag>, timespec*) () at /lib64/libQt5Core.so.5
#3  0x00007f1e3d223192 in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#4  0x00007f1e3d1d0f3a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#5  0x00007f1e3d00a35c in QThread::exec() () at /lib64/libQt5Core.so.5
#6  0x00007f1e3842b915 in QQmlThreadPrivate::run() () at /lib64/libQt5Qml.so.5
#7  0x00007f1e3d00ef99 in QThreadPrivate::start(void*) () at /lib64/libQt5Core.so.5
#8  0x00007f1e3f68266d in start_thread () at /lib64/libpthread.so.0
#9  0x00007f1e3f3bdded in clone () at /lib64/libc.so.6

Thread 3 (Thread 0x7f1e24be4700 (LWP 14384)):
#0  0x00007f1e3f3b3dd3 in select () at /lib64/libc.so.6
#1  0x00007f1e3d2213af in qt_safe_select(int, fd_set*, fd_set*, fd_set*, timespec const*) () at /lib64/libQt5Core.so.5
#2  0x00007f1e3d222ccb in QEventDispatcherUNIXPrivate::doSelect(QFlags<QEventLoop::ProcessEventsFlag>, timespec*) () at /lib64/libQt5Core.so.5
#3  0x00007f1e3d223192 in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#4  0x00007f1e3d1d0f3a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#5  0x00007f1e3d00a35c in QThread::exec() () at /lib64/libQt5Core.so.5
#6  0x00007f1e3fbec615 in QDBusConnectionManager::run() () at /lib64/libQt5DBus.so.5
#7  0x00007f1e3d00ef99 in QThreadPrivate::start(void*) () at /lib64/libQt5Core.so.5
#8  0x00007f1e3f68266d in start_thread () at /lib64/libpthread.so.0
#9  0x00007f1e3f3bdded in clone () at /lib64/libc.so.6

Thread 2 (Thread 0x7f1e268e7700 (LWP 14370)):
#0  0x00007f1e3f3b1f9d in poll () at /lib64/libc.so.6
#1  0x00007f1e3e527902 in _xcb_conn_wait () at /lib64/libxcb.so.1
#2  0x00007f1e3e529657 in xcb_wait_for_event () at /lib64/libxcb.so.1
#3  0x00007f1e27d9a779 in QXcbEventReader::run() () at /lib64/libQt5XcbQpa.so.5
#4  0x00007f1e3d00ef99 in QThreadPrivate::start(void*) () at /lib64/libQt5Core.so.5
#5  0x00007f1e3f68266d in start_thread () at /lib64/libpthread.so.0
#6  0x00007f1e3f3bdded in clone () at /lib64/libc.so.6

Thread 1 (Thread 0x7f1e3fad3840 (LWP 14366)):
#0  0x00007f1e3f687c4f in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007f1e3d00fd9b in QWaitCondition::wait(QMutex*, unsigned long) () at /lib64/libQt5Core.so.5
#2  0x00007f1e388f1f55 in QSGThreadedRenderLoop::polishAndSync(QSGThreadedRenderLoop::Window*, bool) () at /lib64/libQt5Quick.so.5
#3  0x00007f1e388f3f5f in QSGThreadedRenderLoop::handleExposure(QQuickWindow*) () at /lib64/libQt5Quick.so.5
#4  0x00007f1e388f459b in QSGThreadedRenderLoop::exposureChanged(QQuickWindow*) () at /lib64/libQt5Quick.so.5
#5  0x00007f1e3d52052b in QWindow::event(QEvent*) () at /lib64/libQt5Gui.so.5
#6  0x00007f1e389260c5 in QQuickWindow::event(QEvent*) () at /lib64/libQt5Quick.so.5
#7  0x00007f1d88bf7fdb in PlasmaQuick::Dialog::event(QEvent*) () at /lib64/libKF5PlasmaQuick.so.5
#8  0x00007f1e3db32c4c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /lib64/libQt5Widgets.so.5
#9  0x00007f1e3db37db6 in QApplication::notify(QObject*, QEvent*) () at /lib64/libQt5Widgets.so.5
#10 0x00007f1e3d1d30b8 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /lib64/libQt5Core.so.5
#11 0x00007f1e3d516077 in QGuiApplicationPrivate::processExposeEvent(QWindowSystemInterfacePrivate::ExposeEvent*) () at /lib64/libQt5Gui.so.5
#12 0x00007f1e3d516b7d in QGuiApplicationPrivate::processWindowSystemEvent(QWindowSystemInterfacePrivate::WindowSystemEvent*) () at /lib64/libQt5Gui.so.5
#13 0x00007f1e3d4f5ccb in QWindowSystemInterface::sendWindowSystemEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Gui.so.5
#14 0x00007f1e27e097f6 in QUnixEventDispatcherQPA::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5XcbQpa.so.5
#15 0x00007f1e3d1d0f3a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#16 0x00007f1e3d1d92a1 in QCoreApplication::exec() () at /lib64/libQt5Core.so.5
#17 0x00007f1e3f8a10e6 in kdemain () at /lib64/libkdeinit5_kwin_x11.so
#18 0x00007f1e3f2e8600 in __libc_start_main () at /lib64/libc.so.6
#19 0x00000000004007b9 in _start ()

Reported using DrKonqi