Application: plasma-desktop (0.4)
KDE Platform Version: 4.6.2 (4.6.2)
Qt Version: 4.7.2
Operating System: Linux 2.6.38-8-generic x86_64
Distribution: Ubuntu Natty (development branch)

-- Information about the crash:
- What I was doing when the application crashed: 
Watching an embedded YouTube video on Facebook via Firefox.

The crash does not seem to be reproducible.

-- Backtrace:
Application: Plasma Desktop Shell (plasma-desktop), signal: Segmentation fault
[Current thread is 1 (Thread 0x7f4761cb67a0 (LWP 1416))]

Thread 4 (Thread 0x7f4745a59700 (LWP 1417)):
#0  __pthread_mutex_lock (mutex=0x19f92f8) at pthread_mutex_lock.c:47
#1  0x00007f4755f89461 in g_main_context_query () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f4755f8a00a in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f4755f8a639 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f475e7b6446 in QEventDispatcherGlib::processEvents (this=0x19f8880, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:424
#5  0x00007f475e78a882 in QEventLoop::processEvents (this=<value optimized out>, flags=...) at kernel/qeventloop.cpp:149
#6  0x00007f475e78aabc in QEventLoop::exec (this=0x7f4745a58db0, flags=...) at kernel/qeventloop.cpp:201
#7  0x00007f475e6a1924 in QThread::exec (this=<value optimized out>) at thread/qthread.cpp:492
#8  0x00007f475e76cc2f in QInotifyFileSystemWatcherEngine::run (this=0x19f8420) at io/qfilesystemwatcher_inotify.cpp:248
#9  0x00007f475e6a4175 in QThreadPrivate::start (arg=0x19f8420) at thread/qthread_unix.cpp:320
#10 0x00007f475688dd8c in start_thread (arg=0x7f4745a59700) at pthread_create.c:304
#11 0x00007f47615b504d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#12 0x0000000000000000 in ?? ()

Thread 3 (Thread 0x7f473999f700 (LWP 1419)):
#0  0x00007f47568903c4 in __pthread_mutex_lock (mutex=0x1aa32e8) at pthread_mutex_lock.c:61
#1  0x00007f4755f890d3 in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f4755f89f9d in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f4755f8a639 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f475e7b6446 in QEventDispatcherGlib::processEvents (this=0x1aa32c0, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:424
#5  0x00007f475e78a882 in QEventLoop::processEvents (this=<value optimized out>, flags=...) at kernel/qeventloop.cpp:149
#6  0x00007f475e78aabc in QEventLoop::exec (this=0x7f473999edb0, flags=...) at kernel/qeventloop.cpp:201
#7  0x00007f475e6a1924 in QThread::exec (this=<value optimized out>) at thread/qthread.cpp:492
#8  0x00007f475e76cc2f in QInotifyFileSystemWatcherEngine::run (this=0x1aa2710) at io/qfilesystemwatcher_inotify.cpp:248
#9  0x00007f475e6a4175 in QThreadPrivate::start (arg=0x1aa2710) at thread/qthread_unix.cpp:320
#10 0x00007f475688dd8c in start_thread (arg=0x7f473999f700) at pthread_create.c:304
#11 0x00007f47615b504d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#12 0x0000000000000000 in ?? ()

Thread 2 (Thread 0x7f4736f56700 (LWP 1424)):
#0  0x00007f47615a7f03 in __poll (fds=<value optimized out>, nfds=<value optimized out>, timeout=<value optimized out>) at ../sysdeps/unix/sysv/linux/poll.c:87
#1  0x00007f4755f8a104 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f4755f8a9f2 in g_main_loop_run () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f4738288c44 in ?? () from /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
#4  0x00007f4755fb13e4 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f475688dd8c in start_thread (arg=0x7f4736f56700) at pthread_create.c:304
#6  0x00007f47615b504d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#7  0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7f4761cb67a0 (LWP 1416)):
[KCrash Handler]
#6  ref (cacheName=...) at /usr/include/qt4/QtCore/qatomic_x86_64.h:121
#7  QString (cacheName=...) at /usr/include/qt4/QtCore/qstring.h:729
#8  operator+ (cacheName=...) at /usr/include/qt4/QtCore/qstring.h:1024
#9  KSharedDataCache::deleteCache (cacheName=...) at ../../kdecore/util/kshareddatacache.cpp:1515
#10 0x00007f475ef6ed02 in recoverCorruptedCache (this=0x7fffd7f77070, _d=<value optimized out>) at ../../kdecore/util/kshareddatacache.cpp:1085
#11 cautiousLock (this=0x7fffd7f77070, _d=<value optimized out>) at ../../kdecore/util/kshareddatacache.cpp:1122
#12 KSharedDataCache::Private::CacheLocker::CacheLocker (this=0x7fffd7f77070, _d=<value optimized out>) at ../../kdecore/util/kshareddatacache.cpp:1146
#13 0x00007f475ef6b6e0 in KSharedDataCache::find (this=0x7f47403659b0, key=..., destination=0x7fffd7f77120) at ../../kdecore/util/kshareddatacache.cpp:1462
#14 0x00007f475f3f3e43 in KIconLoaderPrivate::findCachedPixmapWithPath (this=0x7f474008d120, key=..., data=..., path=...) at ../../kdeui/icons/kiconloader.cpp:868
#15 0x00007f475f3f6d39 in KIconLoader::loadIcon (this=0x7f4740269240, _name=<value optimized out>, group=KIconLoader::Desktop, size=24, state=0, overlays=..., path_store=0x0, canReturnNull=false) at ../../kdeui/icons/kiconloader.cpp:1231
#16 0x00007f475f3eec99 in KIconEngine::pixmap (this=<value optimized out>, size=..., mode=<value optimized out>, state=<value optimized out>) at ../../kdeui/icons/kiconengine.cpp:93
#17 0x00007f475dbf5dd5 in QIcon::pixmap (this=<value optimized out>, size=<value optimized out>, mode=<value optimized out>, state=<value optimized out>) at image/qicon.cpp:676
#18 0x00007f4761197099 in Plasma::IconWidgetPrivate::decoration (this=0x2ff7ab0, option=<value optimized out>, useHoverEffect=false, usePressedEffect=false) at ../../plasma/widgets/iconwidget.cpp:812
#19 0x00007f476119ce51 in Plasma::IconWidget::paint (this=0x2ff5e00, painter=0x7fffd7f77c40, option=0x151c218, widget=<value optimized out>) at ../../plasma/widgets/iconwidget.cpp:1128
#20 0x00007f4747e4d3e9 in SystemTray::DBusSystemTrayWidget::paint (this=0x2ff5e00, painter=0x7fffd7f77c40, option=0x151c218, widget=<value optimized out>) at ../../../../../plasma/generic/applets/systemtray/protocols/dbussystemtray/dbussystemtraywidget.cpp:189
#21 0x00007f475e13c19d in _q_paintItem (item=<value optimized out>, painter=0x7fffd7f77c40, option=0x151c218, widget=0x0, useWindowOpacity=<value optimized out>, painterStateProtection=true) at graphicsview/qgraphicsscene.cpp:4314
#22 0x00007f475e13c4b0 in _q_paintIntoCache (pix=0x7fffd7f78170, item=0x2ff5e10, pixmapExposed=..., itemToPixmap=..., renderHints=..., option=0x151c218, painterStateProtection=true) at graphicsview/qgraphicsscene.cpp:4352
#23 0x00007f475e14fce8 in QGraphicsScenePrivate::drawItemHelper (this=0x151bff0, item=0x2ff5e10, painter=0x7fffd7f7a180, option=0x151c218, widget=<value optimized out>, painterStateProtection=true) at graphicsview/qgraphicsscene.cpp:4690
#24 0x00007f475e1508ba in QGraphicsScenePrivate::draw (this=0x151bff0, item=0x2ff5e10, painter=0x7fffd7f7a180, viewTransform=0x7fffd7f79f10, transformPtr=0x7fffd7f78830, exposedRegion=0x20cc740, widget=0x1b206d0, opacity=1, effectTransform=0x0, wasDirtyParentSceneTransform=false, drawItem=true) at graphicsview/qgraphicsscene.cpp:4962
#25 0x00007f475e151565 in QGraphicsScenePrivate::drawSubtreeRecursive (this=0x151bff0, item=0x2ff5e10, painter=0x7fffd7f7a180, viewTransform=0x7fffd7f79f10, exposedRegion=0x20cc740, widget=0x1b206d0, parentOpacity=<value optimized out>, effectTransform=0x0) at graphicsview/qgraphicsscene.cpp:4853
#26 0x00007f475e150730 in QGraphicsScenePrivate::draw (this=0x151bff0, item=0x179c5f0, painter=0x7fffd7f7a180, viewTransform=0x7fffd7f79f10, transformPtr=0x7fffd7f78e30, exposedRegion=0x20cc740, widget=0x1b206d0, opacity=1, effectTransform=0x0, wasDirtyParentSceneTransform=false, drawItem=true) at graphicsview/qgraphicsscene.cpp:4979
#27 0x00007f475e151565 in QGraphicsScenePrivate::drawSubtreeRecursive (this=0x151bff0, item=0x179c5f0, painter=0x7fffd7f7a180, viewTransform=0x7fffd7f79f10, exposedRegion=0x20cc740, widget=0x1b206d0, parentOpacity=<value optimized out>, effectTransform=0x0) at graphicsview/qgraphicsscene.cpp:4853
#28 0x00007f475e150730 in QGraphicsScenePrivate::draw (this=0x151bff0, item=0x174fa50, painter=0x7fffd7f7a180, viewTransform=0x7fffd7f79f10, transformPtr=0x7fffd7f79430, exposedRegion=0x20cc740, widget=0x1b206d0, opacity=1, effectTransform=0x0, wasDirtyParentSceneTransform=false, drawItem=true) at graphicsview/qgraphicsscene.cpp:4979
#29 0x00007f475e151565 in QGraphicsScenePrivate::drawSubtreeRecursive (this=0x151bff0, item=0x174fa50, painter=0x7fffd7f7a180, viewTransform=0x7fffd7f79f10, exposedRegion=0x20cc740, widget=0x1b206d0, parentOpacity=<value optimized out>, effectTransform=0x0) at graphicsview/qgraphicsscene.cpp:4853
#30 0x00007f475e150730 in QGraphicsScenePrivate::draw (this=0x151bff0, item=0x1619010, painter=0x7fffd7f7a180, viewTransform=0x7fffd7f79f10, transformPtr=0x7fffd7f79a30, exposedRegion=0x20cc740, widget=0x1b206d0, opacity=1, effectTransform=0x0, wasDirtyParentSceneTransform=false, drawItem=true) at graphicsview/qgraphicsscene.cpp:4979
#31 0x00007f475e151565 in QGraphicsScenePrivate::drawSubtreeRecursive (this=0x151bff0, item=0x1619010, painter=0x7fffd7f7a180, viewTransform=0x7fffd7f79f10, exposedRegion=0x20cc740, widget=0x1b206d0, parentOpacity=<value optimized out>, effectTransform=0x0) at graphicsview/qgraphicsscene.cpp:4853
#32 0x00007f475e151d94 in QGraphicsScenePrivate::drawItems (this=0x151bff0, painter=0x7fffd7f7a180, viewTransform=0x7fffd7f79f10, exposedRegion=0x20cc740, widget=0x1b206d0) at graphicsview/qgraphicsscene.cpp:4735
#33 0x00007f475e16ebd2 in QGraphicsView::paintEvent (this=<value optimized out>, event=<value optimized out>) at graphicsview/qgraphicsview.cpp:3469
#34 0x00007f475db9dc6a in QWidget::event (this=0x19ddd10, event=0x7fffd7f7aaa0) at kernel/qwidget.cpp:8405
#35 0x00007f475df4da66 in QFrame::event (this=0x19ddd10, e=0x7fffd7f7aaa0) at widgets/qframe.cpp:557
#36 0x00007f475e16fe8b in QGraphicsView::viewportEvent (this=0x19ddd10, event=0x7fffd7f7aaa0) at graphicsview/qgraphicsview.cpp:2864
#37 0x00007f475e78b627 in QCoreApplicationPrivate::sendThroughObjectEventFilters (this=<value optimized out>, receiver=0x1b206d0, event=0x7fffd7f7aaa0) at kernel/qcoreapplication.cpp:846
#38 0x00007f475db4c9b1 in QApplicationPrivate::notify_helper (this=0x151b240, receiver=0x1b206d0, e=0x7fffd7f7aaa0) at kernel/qapplication.cpp:4458
#39 0x00007f475db513aa in QApplication::notify (this=<value optimized out>, receiver=0x1b206d0, e=0x7fffd7f7aaa0) at kernel/qapplication.cpp:4341
#40 0x00007f475f443866 in KApplication::notify (this=0x14edfd0, receiver=0x1b206d0, event=0x7fffd7f7aaa0) at ../../kdeui/kernel/kapplication.cpp:311
#41 0x00007f475e78b49c in QCoreApplication::notifyInternal (this=0x14edfd0, receiver=0x1b206d0, event=0x7fffd7f7aaa0) at kernel/qcoreapplication.cpp:731
#42 0x00007f475db9aabd in sendSpontaneousEvent (this=0x21adfe0, pdev=0x1dd7c88, rgn=..., offset=..., flags=4, sharedPainter=0x0, backingStore=0x1f9e300) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:218
#43 QWidgetPrivate::drawWidget (this=0x21adfe0, pdev=0x1dd7c88, rgn=..., offset=..., flags=4, sharedPainter=0x0, backingStore=0x1f9e300) at kernel/qwidget.cpp:5492
#44 0x00007f475db9b6d2 in QWidgetPrivate::paintSiblingsRecursive (this=0x20cc2b0, pdev=0x1dd7c88, siblings=..., index=<value optimized out>, rgn=..., offset=..., flags=4, sharedPainter=0x0, backingStore=0x1f9e300) at kernel/qwidget.cpp:5699
#45 0x00007f475db9a7fc in QWidgetPrivate::drawWidget (this=0x20cc2b0, pdev=0x1dd7c88, rgn=..., offset=..., flags=<value optimized out>, sharedPainter=0x0, backingStore=0x1f9e300) at kernel/qwidget.cpp:5545
#46 0x00007f475dd5f2fb in QWidgetBackingStore::sync (this=0x1f9e300) at painting/qbackingstore.cpp:1333
#47 0x00007f475db90f50 in QWidgetPrivate::syncBackingStore (this=0x20cc2b0) at kernel/qwidget.cpp:1842
#48 0x00007f475db9e184 in QWidget::event (this=0x19ddd10, event=0x2faf460) at kernel/qwidget.cpp:8552
#49 0x00007f475df4da66 in QFrame::event (this=0x19ddd10, e=0x2faf460) at widgets/qframe.cpp:557
#50 0x00007f475dfcf1fb in QAbstractScrollArea::event (this=0x19ddd10, e=0x2faf460) at widgets/qabstractscrollarea.cpp:996
#51 0x00007f47618a6fe6 in PanelView::event (this=0x19ddd10, event=0x2faf460) at ../../../../plasma/desktop/shell/panelview.cpp:1604
#52 0x00007f475db4c9e4 in QApplicationPrivate::notify_helper (this=0x151b240, receiver=0x19ddd10, e=0x2faf460) at kernel/qapplication.cpp:4462
#53 0x00007f475db513aa in QApplication::notify (this=<value optimized out>, receiver=0x19ddd10, e=0x2faf460) at kernel/qapplication.cpp:4341
#54 0x00007f475f443866 in KApplication::notify (this=0x14edfd0, receiver=0x19ddd10, event=0x2faf460) at ../../kdeui/kernel/kapplication.cpp:311
#55 0x00007f475e78b49c in QCoreApplication::notifyInternal (this=0x14edfd0, receiver=0x19ddd10, event=0x2faf460) at kernel/qcoreapplication.cpp:731
#56 0x00007f475e78ec25 in sendEvent (receiver=0x19ddd10, event_type=77, data=0x149db60) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#57 QCoreApplicationPrivate::sendPostedEvents (receiver=0x19ddd10, event_type=77, data=0x149db60) at kernel/qcoreapplication.cpp:1372
#58 0x00007f475e14888a in dispatchPendingUpdateRequests (this=0x151bff0) at ../../include/QtGui/private/../../../src/gui/graphicsview/qgraphicsview_p.h:189
#59 QGraphicsScenePrivate::_q_processDirtyItems (this=0x151bff0) at graphicsview/qgraphicsscene.cpp:510
#60 0x00007f475e148caa in QGraphicsScene::qt_metacall (this=0x15ef030, _c=QMetaObject::InvokeMetaMethod, _id=14, _a=0x221dcc0) at .moc/release-shared/moc_qgraphicsscene.cpp:130
#61 0x00007f47610eab65 in Plasma::Corona::qt_metacall (this=0x15ef030, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x221dcc0) at ./corona.moc:109
#62 0x00007f476189b065 in DesktopCorona::qt_metacall (this=0x15ef030, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x221dcc0) at ./desktopcorona.moc:101
#63 0x00007f475e79f49a in QObject::event (this=0x15ef030, e=<value optimized out>) at kernel/qobject.cpp:1226
#64 0x00007f475e15558b in QGraphicsScene::event (this=0x15ef030, event=0x2fdb730) at graphicsview/qgraphicsscene.cpp:3544
#65 0x00007f475db4c9e4 in QApplicationPrivate::notify_helper (this=0x151b240, receiver=0x15ef030, e=0x2fdb730) at kernel/qapplication.cpp:4462
#66 0x00007f475db513aa in QApplication::notify (this=<value optimized out>, receiver=0x15ef030, e=0x2fdb730) at kernel/qapplication.cpp:4341
#67 0x00007f475f443866 in KApplication::notify (this=0x14edfd0, receiver=0x15ef030, event=0x2fdb730) at ../../kdeui/kernel/kapplication.cpp:311
#68 0x00007f475e78b49c in QCoreApplication::notifyInternal (this=0x14edfd0, receiver=0x15ef030, event=0x2fdb730) at kernel/qcoreapplication.cpp:731
#69 0x00007f475e78ec25 in sendEvent (receiver=0x0, event_type=0, data=0x149db60) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#70 QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=0, data=0x149db60) at kernel/qcoreapplication.cpp:1372
#71 0x00007f475e7b6253 in sendPostedEvents (s=0x151ecc0) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:220
#72 postEventSourceDispatch (s=0x151ecc0) at kernel/qeventdispatcher_glib.cpp:277
#73 0x00007f4755f89bcd in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#74 0x00007f4755f8a3a8 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#75 0x00007f4755f8a639 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#76 0x00007f475e7b63ef in QEventDispatcherGlib::processEvents (this=0x149d340, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:422
#77 0x00007f475dbf3dfe in QGuiEventDispatcherGlib::processEvents (this=<value optimized out>, flags=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:204
#78 0x00007f475e78a882 in QEventLoop::processEvents (this=<value optimized out>, flags=...) at kernel/qeventloop.cpp:149
#79 0x00007f475e78aabc in QEventLoop::exec (this=0x7fffd7f7ca40, flags=...) at kernel/qeventloop.cpp:201
#80 0x00007f475e78eecb in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1008
#81 0x00007f47618a1897 in kdemain (argc=1, argv=0x7fffd7f7ce08) at ../../../../plasma/desktop/shell/main.cpp:118
#82 0x00007f47614edeff in __libc_start_main (main=0x400740 <main(int, char**)>, argc=1, ubp_av=0x7fffd7f7ce08, init=<value optimized out>, fini=<value optimized out>, rtld_fini=<value optimized out>, stack_end=0x7fffd7f7cdf8) at libc-start.c:226
#83 0x0000000000400669 in _start ()

Possible duplicates by query: bug 266119, bug 264220, bug 262340, bug 261691, bug 258270.

Reported using DrKonqi