Application: plasma-desktop (4.11.20)
KDE Platform Version: 4.14.9
Qt Version: 4.8.6
Operating System: Linux 4.1.6-2.gce0123d-desktop x86_64
Distribution: "openSUSE 13.2 (Harlequin) (x86_64)"

-- Information about the crash:
More useful than what I *was* doing may be what I wasn't: I wasn't typing or moving the pointer.  I was reading a webpage in firefox when this occurred.  Naturally, it may have been in response to some system event, but it didn't seem to be a result of anything I did at that particular moment.

The crash can be reproduced sometimes.

-- 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 0x7f49c2e5a780 (LWP 3560))]

Thread 4 (Thread 0x7f4996513700 (LWP 3562)):
#0  0x00007f49c175005f in pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f49b3f4b8cb in QTWTF::TCMalloc_PageHeap::scavengerThread() (this=0x7f49b4249f00 <QTWTF::pageheap_memory>) at ../3rdparty/javascriptcore/JavaScriptCore/wtf/FastMalloc.cpp:2359
#2  0x00007f49b3f4b909 in QTWTF::TCMalloc_PageHeap::runScavengerThread(void*) (context=<optimized out>) at ../3rdparty/javascriptcore/JavaScriptCore/wtf/FastMalloc.cpp:1464
#3  0x00007f49c174c0a4 in start_thread (arg=0x7f4996513700) at pthread_create.c:309
#4  0x00007f49c043f08d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 3 (Thread 0x7f490f623700 (LWP 3563)):
#0  0x00007f49c0436c5d in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f49bd549be4 in g_main_context_iterate (priority=2147483647, n_fds=1, fds=0x7f4908003410, timeout=-1, context=0x7f49080009a0) at gmain.c:4076
#2  0x00007f49bd549be4 in g_main_context_iterate (context=context@entry=0x7f49080009a0, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at gmain.c:3776
#3  0x00007f49bd549cec in g_main_context_iteration (context=0x7f49080009a0, may_block=1) at gmain.c:3842
#4  0x00007f49c1b110de in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7f49080008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:452
#5  0x00007f49c1ae2e6f in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7f490f622e20, flags=...) at kernel/qeventloop.cpp:149
#6  0x00007f49c1ae3165 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7f490f622e20, flags=...) at kernel/qeventloop.cpp:204
#7  0x00007f49c19e00bf in QThread::exec() (this=this@entry=0x37b5a30) at thread/qthread.cpp:538
#8  0x00007f49c1ac4783 in QInotifyFileSystemWatcherEngine::run() (this=0x37b5a30) at io/qfilesystemwatcher_inotify.cpp:265
#9  0x00007f49c19e279f in QThreadPrivate::start(void*) (arg=0x37b5a30) at thread/qthread_unix.cpp:349
#10 0x00007f49c174c0a4 in start_thread (arg=0x7f490f623700) at pthread_create.c:309
#11 0x00007f49c043f08d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 2 (Thread 0x7f490548c700 (LWP 3610)):
#0  0x00007f49c1752a9d in read () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f49bd58a750 in g_wakeup_acknowledge (__nbytes=16, __buf=0x7f490548bc60, __fd=<optimized out>) at /usr/include/bits/unistd.h:44
#2  0x00007f49bd58a750 in g_wakeup_acknowledge (wakeup=0x7f49000025a0) at gwakeup.c:210
#3  0x00007f49bd549714 in g_main_context_check (context=context@entry=0x7f48f80009a0, max_priority=2147483647, fds=fds@entry=0x7f48f80013e0, n_fds=n_fds@entry=1) at gmain.c:3579
#4  0x00007f49bd549b7b in g_main_context_iterate (context=context@entry=0x7f48f80009a0, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at gmain.c:3778
#5  0x00007f49bd549cec in g_main_context_iteration (context=0x7f48f80009a0, may_block=1) at gmain.c:3842
#6  0x00007f49c1b110de in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7f48f80008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:452
#7  0x00007f49c1ae2e6f in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7f490548be60, flags=...) at kernel/qeventloop.cpp:149
#8  0x00007f49c1ae3165 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7f490548be60, flags=...) at kernel/qeventloop.cpp:204
#9  0x00007f49c19e00bf in QThread::exec() (this=<optimized out>) at thread/qthread.cpp:538
#10 0x00007f49c19e279f in QThreadPrivate::start(void*) (arg=0x48420b0) at thread/qthread_unix.cpp:349
#11 0x00007f49c174c0a4 in start_thread (arg=0x7f490548c700) at pthread_create.c:309
#12 0x00007f49c043f08d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 1 (Thread 0x7f49c2e5a780 (LWP 3560)):
[KCrash Handler]
#6  0x00007f49c123a919 in QGraphicsScenePrivate::draw(QGraphicsItem*, QPainter*, QTransform const*, QTransform const*, QRegion*, QWidget*, double, QTransform const*, bool, bool) (this=this@entry=0x25a5480, item=item@entry=0x285eed0, painter=painter@entry=0x7ffd3327cb70, viewTransform=viewTransform@entry=0x7ffd3327cc20, transformPtr=transformPtr@entry=0x0, exposedRegion=exposedRegion@entry=0x4513628, widget=0x49047c0, opacity=opacity@entry=1, effectTransform=effectTransform@entry=0x0, wasDirtyParentSceneTransform=wasDirtyParentSceneTransform@entry=false, drawItem=false) at graphicsview/qgraphicsscene.cpp:4904
#7  0x00007f49c123b835 in QGraphicsScenePrivate::drawSubtreeRecursive(QGraphicsItem*, QPainter*, QTransform const*, QRegion*, QWidget*, double, QTransform const*) (this=this@entry=0x25a5480, item=0x285eed0, painter=painter@entry=0x7ffd3327cb70, viewTransform=viewTransform@entry=0x7ffd3327cc20, exposedRegion=exposedRegion@entry=0x4513628, widget=widget@entry=0x49047c0, parentOpacity=parentOpacity@entry=1, effectTransform=effectTransform@entry=0x0) at graphicsview/qgraphicsscene.cpp:4857
#8  0x00007f49c123bee6 in QGraphicsScenePrivate::drawItems(QPainter*, QTransform const*, QRegion*, QWidget*) (this=0x25a5480, painter=painter@entry=0x7ffd3327cb70, viewTransform=viewTransform@entry=0x7ffd3327cc20, exposedRegion=exposedRegion@entry=0x4513628, widget=0x49047c0) at graphicsview/qgraphicsscene.cpp:4739
#9  0x00007f49c125961e in QGraphicsView::paintEvent(QPaintEvent*) (this=<optimized out>, event=<optimized out>) at graphicsview/qgraphicsview.cpp:3471
#10 0x00007f49c0caf9f0 in QWidget::event(QEvent*) (this=this@entry=0x43fd1a0, event=event@entry=0x7ffd3327d200) at kernel/qwidget.cpp:8546
#11 0x00007f49c104c5ee in QFrame::event(QEvent*) (this=0x43fd1a0, e=0x7ffd3327d200) at widgets/qframe.cpp:557
#12 0x00007f49c1258429 in QGraphicsView::viewportEvent(QEvent*) (this=0x43fd1a0, event=0x7ffd3327d200) at graphicsview/qgraphicsview.cpp:2866
#13 0x00007f49c1ae4416 in QCoreApplicationPrivate::sendThroughObjectEventFilters(QObject*, QEvent*) (this=this@entry=0x2417390, receiver=receiver@entry=0x49047c0, event=event@entry=0x7ffd3327d200) at kernel/qcoreapplication.cpp:1063
#14 0x00007f49c0c6074c in QApplicationPrivate::notify_helper(QObject*, QEvent*) (this=this@entry=0x2417390, receiver=receiver@entry=0x49047c0, e=e@entry=0x7ffd3327d200) at kernel/qapplication.cpp:4561
#15 0x00007f49c0c66cad in QApplication::notify(QObject*, QEvent*) (this=this@entry=0x240cd90, receiver=receiver@entry=0x49047c0, e=e@entry=0x7ffd3327d200) at kernel/qapplication.cpp:4351
#16 0x00007f49c2887e0a in KApplication::notify(QObject*, QEvent*) (this=0x240cd90, receiver=0x49047c0, event=0x7ffd3327d200) at /usr/src/debug/kdelibs-4.14.9/kdeui/kernel/kapplication.cpp:311
#17 0x00007f49c1ae42ad in QCoreApplication::notifyInternal(QObject*, QEvent*) (this=0x240cd90, receiver=receiver@entry=0x49047c0, event=event@entry=0x7ffd3327d200) at kernel/qcoreapplication.cpp:953
#18 0x00007f49c0caa111 in QWidgetPrivate::drawWidget(QPaintDevice*, QRegion const&, QPoint const&, int, QPainter*, QWidgetBackingStore*) (event=0x7ffd3327d200, receiver=0x49047c0) at ../../src/corelib/kernel/qcoreapplication.h:234
#19 0x00007f49c0caa111 in QWidgetPrivate::drawWidget(QPaintDevice*, QRegion const&, QPoint const&, int, QPainter*, QWidgetBackingStore*) (this=this@entry=0x49047f0, pdev=pdev@entry=0x27ab920, rgn=..., offset=..., flags=flags@entry=4, sharedPainter=sharedPainter@entry=0x0, backingStore=backingStore@entry=0x29140a0) at kernel/qwidget.cpp:5599
#20 0x00007f49c0caab40 in QWidgetPrivate::paintSiblingsRecursive(QPaintDevice*, QList<QObject*> const&, int, QRegion const&, QPoint const&, int, QPainter*, QWidgetBackingStore*) (this=this@entry=0x45131a0, pdev=pdev@entry=0x27ab920, siblings=..., index=<optimized out>, index@entry=4, rgn=..., offset=..., flags=flags@entry=4, sharedPainter=sharedPainter@entry=0x0, backingStore=backingStore@entry=0x29140a0) at kernel/qwidget.cpp:5808
#21 0x00007f49c0caa9af in QWidgetPrivate::paintSiblingsRecursive(QPaintDevice*, QList<QObject*> const&, int, QRegion const&, QPoint const&, int, QPainter*, QWidgetBackingStore*) (this=this@entry=0x45131a0, pdev=pdev@entry=0x27ab920, siblings=..., index=4, index@entry=5, rgn=..., offset=..., flags=flags@entry=4, sharedPainter=sharedPainter@entry=0x0, backingStore=backingStore@entry=0x29140a0) at kernel/qwidget.cpp:5795
#22 0x00007f49c0caa9af in QWidgetPrivate::paintSiblingsRecursive(QPaintDevice*, QList<QObject*> const&, int, QRegion const&, QPoint const&, int, QPainter*, QWidgetBackingStore*) (this=this@entry=0x45131a0, pdev=pdev@entry=0x27ab920, siblings=..., index=5, rgn=..., offset=..., flags=flags@entry=4, sharedPainter=sharedPainter@entry=0x0, backingStore=backingStore@entry=0x29140a0) at kernel/qwidget.cpp:5795
#23 0x00007f49c0ca9ccc in QWidgetPrivate::drawWidget(QPaintDevice*, QRegion const&, QPoint const&, int, QPainter*, QWidgetBackingStore*) (this=0x45131a0, pdev=0x27ab920, rgn=..., offset=..., flags=flags@entry=5, sharedPainter=sharedPainter@entry=0x0, backingStore=backingStore@entry=0x29140a0) at kernel/qwidget.cpp:5652
#24 0x00007f49c0e68cce in QWidgetBackingStore::sync() (this=0x29140a0) at painting/qbackingstore.cpp:1373
#25 0x00007f49c0c9f5c0 in QWidgetPrivate::syncBackingStore() (this=this@entry=0x45131a0) at kernel/qwidget.cpp:1894
#26 0x00007f49c0caf56a in QWidget::event(QEvent*) (this=this@entry=0x43fd1a0, event=event@entry=0x52aac90) at kernel/qwidget.cpp:8693
#27 0x00007f49c104c5ee in QFrame::event(QEvent*) (this=this@entry=0x43fd1a0, e=e@entry=0x52aac90) at widgets/qframe.cpp:557
#28 0x00007f49c10c8b7b in QAbstractScrollArea::event(QEvent*) (this=0x43fd1a0, e=0x52aac90) at widgets/qabstractscrollarea.cpp:996
#29 0x00007f49c0c6076c in QApplicationPrivate::notify_helper(QObject*, QEvent*) (this=this@entry=0x2417390, receiver=receiver@entry=0x43fd1a0, e=e@entry=0x52aac90) at kernel/qapplication.cpp:4565
#30 0x00007f49c0c66cad in QApplication::notify(QObject*, QEvent*) (this=this@entry=0x240cd90, receiver=receiver@entry=0x43fd1a0, e=e@entry=0x52aac90) at kernel/qapplication.cpp:4351
#31 0x00007f49c2887e0a in KApplication::notify(QObject*, QEvent*) (this=0x240cd90, receiver=0x43fd1a0, event=0x52aac90) at /usr/src/debug/kdelibs-4.14.9/kdeui/kernel/kapplication.cpp:311
#32 0x00007f49c1ae42ad in QCoreApplication::notifyInternal(QObject*, QEvent*) (this=0x240cd90, receiver=receiver@entry=0x43fd1a0, event=event@entry=0x52aac90) at kernel/qcoreapplication.cpp:953
#33 0x00007f49c1ae757d in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) (event=0x52aac90, receiver=0x43fd1a0) at kernel/qcoreapplication.h:231
#34 0x00007f49c1ae757d in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) (receiver=0x43fd1a0, event_type=event_type@entry=77, data=0x23470a0) at kernel/qcoreapplication.cpp:1577
#35 0x00007f49c1ae7a23 in QCoreApplication::sendPostedEvents(QObject*, int) (receiver=<optimized out>, event_type=event_type@entry=77) at kernel/qcoreapplication.cpp:1470
#36 0x00007f49c12306df in QGraphicsScenePrivate::_q_processDirtyItems() (this=0x45131a0) at ../../src/gui/graphicsview/qgraphicsview_p.h:200
#37 0x00007f49c12306df in QGraphicsScenePrivate::_q_processDirtyItems() (this=0x25a5480) at graphicsview/qgraphicsscene.cpp:515
#38 0x00007f49c1233c89 in QGraphicsScene::qt_static_metacall(QObject*, QMetaObject::Call, int, void**) (_o=<optimized out>, _id=<optimized out>, _a=<optimized out>, _c=<optimized out>) at .moc/release-shared/moc_qgraphicsscene.cpp:106
#39 0x00007f49c1afc59e in QObject::event(QEvent*) (this=this@entry=0x25a42d0, e=e@entry=0x5b9c630) at kernel/qobject.cpp:1231
#40 0x00007f49c124103b in QGraphicsScene::event(QEvent*) (this=0x25a42d0, event=0x5b9c630) at graphicsview/qgraphicsscene.cpp:3565
#41 0x00007f49c0c6076c in QApplicationPrivate::notify_helper(QObject*, QEvent*) (this=this@entry=0x2417390, receiver=receiver@entry=0x25a42d0, e=e@entry=0x5b9c630) at kernel/qapplication.cpp:4565
#42 0x00007f49c0c66cad in QApplication::notify(QObject*, QEvent*) (this=this@entry=0x240cd90, receiver=receiver@entry=0x25a42d0, e=e@entry=0x5b9c630) at kernel/qapplication.cpp:4351
#43 0x00007f49c2887e0a in KApplication::notify(QObject*, QEvent*) (this=0x240cd90, receiver=0x25a42d0, event=0x5b9c630) at /usr/src/debug/kdelibs-4.14.9/kdeui/kernel/kapplication.cpp:311
#44 0x00007f49c1ae42ad in QCoreApplication::notifyInternal(QObject*, QEvent*) (this=0x240cd90, receiver=receiver@entry=0x25a42d0, event=event@entry=0x5b9c630) at kernel/qcoreapplication.cpp:953
#45 0x00007f49c1ae757d in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) (event=0x5b9c630, receiver=0x25a42d0) at kernel/qcoreapplication.h:231
#46 0x00007f49c1ae757d in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) (receiver=receiver@entry=0x0, event_type=event_type@entry=0, data=0x23470a0) at kernel/qcoreapplication.cpp:1577
#47 0x00007f49c1ae7a23 in QCoreApplication::sendPostedEvents(QObject*, int) (receiver=receiver@entry=0x0, event_type=event_type@entry=0) at kernel/qcoreapplication.cpp:1470
#48 0x00007f49c1b118fe in postEventSourceDispatch(GSource*, GSourceFunc, gpointer) () at kernel/qcoreapplication.h:236
#49 0x00007f49c1b118fe in postEventSourceDispatch(GSource*, GSourceFunc, gpointer) (s=0x2418be0) at kernel/qeventdispatcher_glib.cpp:300
#50 0x00007f49bd549a04 in g_main_context_dispatch (context=0x234d600) at gmain.c:3111
#51 0x00007f49bd549a04 in g_main_context_dispatch (context=context@entry=0x234d600) at gmain.c:3710
#52 0x00007f49bd549c48 in g_main_context_iterate (context=context@entry=0x234d600, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at gmain.c:3781
#53 0x00007f49bd549cec in g_main_context_iteration (context=0x234d600, may_block=1) at gmain.c:3842
#54 0x00007f49c1b110be in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x2405320, flags=...) at kernel/qeventdispatcher_glib.cpp:450
#55 0x00007f49c0cfd676 in QGuiEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=<optimized out>, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#56 0x00007f49c1ae2e6f in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7ffd3327e620, flags=...) at kernel/qeventloop.cpp:149
#57 0x00007f49c1ae3165 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7ffd3327e620, flags=...) at kernel/qeventloop.cpp:204
#58 0x00007f49c1ae85b9 in QCoreApplication::exec() () at kernel/qcoreapplication.cpp:1225
#59 0x00007f49c0c5ef3c in QApplication::exec() () at kernel/qapplication.cpp:3823
#60 0x00007f49ac40ab94 in kdemain(int, char**) (argc=1, argv=0x234d720) at /usr/src/debug/kde-workspace-4.11.20/plasma/desktop/shell/main.cpp:126
#61 0x0000000000408815 in _start ()

Possible duplicates by query: bug 335214, bug 331752.

Reported using DrKonqi