Application: plasma-desktop (4.11.17)
KDE Platform Version: 4.14.6
Qt Version: 4.8.6
Operating System: Linux 3.16.7-21-desktop x86_64
Distribution: "openSUSE 13.2 (Harlequin) (x86_64)"

-- Information about the crash:
- What I was doing when the application crashed: had just changed the settings for graphic effects (from OpenGL 3 -> 2, from native to raster) and KDE froze.  Restart via Ctrl+Alt+Backspace resulted in dual crash notices

- Custom settings of the application:

The crash can be reproduced every time.

-- Backtrace:
Application: Plasma Desktop Shell (plasma-desktop), signal: Segmentation fault
Using host libthread_db library "/lib64/libthread_db.so.1".
[Current thread is 1 (Thread 0x7ff9a3984780 (LWP 5390))]

Thread 3 (Thread 0x7ff9725a1700 (LWP 5396)):
#0  0x00007ff9a227305f in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007ff994aed8cb in  () at /usr/lib64/libQtScript.so.4
#2  0x00007ff994aed909 in  () at /usr/lib64/libQtScript.so.4
#3  0x00007ff9a226f0a4 in start_thread () at /lib64/libpthread.so.0
#4  0x00007ff9a0fda06d in clone () at /lib64/libc.so.6

Thread 2 (Thread 0x7ff8e5b18700 (LWP 5404)):
#0  0x00007ff9a0fcdd0d in read () at /lib64/libc.so.6
#1  0x00007ff98ff5bf45 in  () at /usr/lib64/tls/libnvidia-tls.so.340.76
#2  0x00007ff99e123750 in  () at /usr/lib64/libglib-2.0.so.0
#3  0x00007ff99e0e2714 in g_main_context_check () at /usr/lib64/libglib-2.0.so.0
#4  0x00007ff99e0e2b7b in  () at /usr/lib64/libglib-2.0.so.0
#5  0x00007ff99e0e2cec in g_main_context_iteration () at /usr/lib64/libglib-2.0.so.0
#6  0x00007ff9a26340de in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7ff8e00008e0, flags=...) at kernel/qeventdispatcher_glib.cpp:452
#7  0x00007ff9a2605e6f in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7ff8e5b17e20, flags=...) at kernel/qeventloop.cpp:149
#8  0x00007ff9a2606165 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7ff8e5b17e20, flags=...) at kernel/qeventloop.cpp:204
#9  0x00007ff9a25030bf in QThread::exec() (this=this@entry=0x1c93570) at thread/qthread.cpp:538
#10 0x00007ff9a25e7783 in QInotifyFileSystemWatcherEngine::run() (this=0x1c93570) at io/qfilesystemwatcher_inotify.cpp:265
#11 0x00007ff9a250579f in QThreadPrivate::start(void*) (arg=0x1c93570) at thread/qthread_unix.cpp:349
#12 0x00007ff9a226f0a4 in start_thread () at /lib64/libpthread.so.0
#13 0x00007ff9a0fda06d in clone () at /lib64/libc.so.6

Thread 1 (Thread 0x7ff9a3984780 (LWP 5390)):
[KCrash Handler]
#5  0x00007ff9a260d83e in QMetaObject::cast(QObject*) const (this=0x7ff99764c880 <Plasma::Extender::staticMetaObject>, obj=0x600000) at kernel/qmetaobject.cpp:274
#6  0x00007ff9972a1b35 in  () at /usr/lib64/libplasma.so.3
#7  0x00007ff9972a3ae3 in  () at /usr/lib64/libplasma.so.3
#8  0x00007ff99724af27 in  () at /usr/lib64/libplasma.so.3
#9  0x00007ff9787ec4d6 in SystemTray::PlasmoidTask::forwardConstraintsEvent(QFlags<Plasma::Constraint>) () at /usr/lib64/kde4/plasma_applet_systemtray.so
#10 0x00007ff9787eb0e1 in SystemTray::PlasmoidProtocol::forwardConstraintsEvent(QFlags<Plasma::Constraint>, Plasma::Applet*) () at /usr/lib64/kde4/plasma_applet_systemtray.so
#11 0x00007ff9787e3919 in SystemTray::Manager::forwardConstraintsEvent(QFlags<Plasma::Constraint>, Plasma::Applet*) () at /usr/lib64/kde4/plasma_applet_systemtray.so
#12 0x00007ff9787f1ac1 in SystemTray::Applet::constraintsEvent(QFlags<Plasma::Constraint>) () at /usr/lib64/kde4/plasma_applet_systemtray.so
#13 0x00007ff99724af3d in  () at /usr/lib64/libplasma.so.3
#14 0x00007ff997267aa8 in  () at /usr/lib64/libplasma.so.3
#15 0x00007ff9972748dc in  () at /usr/lib64/libplasma.so.3
#16 0x00007ff9972752da in Plasma::Corona::loadLayout(QString const&) () at /usr/lib64/libplasma.so.3
#17 0x00007ff997275394 in Plasma::Corona::initializeLayout(QString const&) () at /usr/lib64/libplasma.so.3
#18 0x00007ff98baea8f5 in PlasmaApp::corona(bool) () at /usr/lib64/libkdeinit4_plasma-desktop.so
#19 0x00007ff98baeaf05 in PlasmaApp::setupDesktop() () at /usr/lib64/libkdeinit4_plasma-desktop.so
#20 0x00007ff98baef235 in PlasmaApp::qt_static_metacall(QObject*, QMetaObject::Call, int, void**) [clone .part.73] () at /usr/lib64/libkdeinit4_plasma-desktop.so
#21 0x00007ff9a261f59e in QObject::event(QEvent*) (this=0x1d589b0, e=<optimized out>) at kernel/qobject.cpp:1231
#22 0x00007ff9a1788733 in QApplication::event(QEvent*) () at /usr/lib64/libQtGui.so.4
#23 0x00007ff9a178376c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib64/libQtGui.so.4
#24 0x00007ff9a1789cad in QApplication::notify(QObject*, QEvent*) () at /usr/lib64/libQtGui.so.4
#25 0x00007ff9a33aacea in KApplication::notify(QObject*, QEvent*) () at /usr/lib64/libkdeui.so.5
#26 0x00007ff9a26072ad in QCoreApplication::notifyInternal(QObject*, QEvent*) (this=0x1d589b0, receiver=receiver@entry=0x1d589b0, event=event@entry=0x1e9d5d0) at kernel/qcoreapplication.cpp:953
#27 0x00007ff9a260a57d in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) (event=0x1e9d5d0, receiver=0x1d589b0) at kernel/qcoreapplication.h:231
#28 0x00007ff9a260a57d in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) (receiver=receiver@entry=0x0, event_type=event_type@entry=0, data=0x1bb9490) at kernel/qcoreapplication.cpp:1577
#29 0x00007ff9a260aa23 in QCoreApplication::sendPostedEvents(QObject*, int) (receiver=receiver@entry=0x0, event_type=event_type@entry=0) at kernel/qcoreapplication.cpp:1470
#30 0x00007ff9a26348fe in postEventSourceDispatch(GSource*, GSourceFunc, gpointer) () at kernel/qcoreapplication.h:236
#31 0x00007ff9a26348fe in postEventSourceDispatch(GSource*, GSourceFunc, gpointer) (s=0x1d67950) at kernel/qeventdispatcher_glib.cpp:300
#32 0x00007ff99e0e2a04 in g_main_context_dispatch () at /usr/lib64/libglib-2.0.so.0
#33 0x00007ff99e0e2c48 in  () at /usr/lib64/libglib-2.0.so.0
#34 0x00007ff99e0e2cec in g_main_context_iteration () at /usr/lib64/libglib-2.0.so.0
#35 0x00007ff9a26340be in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x1df8c20, flags=...) at kernel/qeventdispatcher_glib.cpp:450
#36 0x00007ff9a1820676 in  () at /usr/lib64/libQtGui.so.4
#37 0x00007ff9a2605e6f in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7fff4862e9d0, flags=...) at kernel/qeventloop.cpp:149
#38 0x00007ff9a2606165 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7fff4862e9d0, flags=...) at kernel/qeventloop.cpp:204
#39 0x00007ff9a260b5b9 in QCoreApplication::exec() () at kernel/qcoreapplication.cpp:1225
#40 0x00007ff98bad5b94 in kdemain () at /usr/lib64/libkdeinit4_plasma-desktop.so
#41 0x0000000000408815 in _start ()

Reported using DrKonqi