Application: plasma-desktop (0.4)
KDE Platform Version: 4.7.4 (4.7.4)
Qt Version: 4.7.4
Operating System: Linux 3.0.0-16-generic-pae i686
Distribution: Ubuntu 11.10

-- Information about the crash:
I had just plugged in a second monitor and was trying to move windows onto it.  The last thing I think I did was probably to right-click on a taskbar entry although I'm not 100% sure.

-- Backtrace:
Application: Plasma Desktop Shell (plasma-desktop), signal: Segmentation fault
[Current thread is 1 (Thread 0xb1ebeb20 (LWP 3275))]

Thread 3 (Thread 0xa73d4b70 (LWP 3281)):
#0  0xb2ff6dbd in __pthread_mutex_lock (mutex=0xa9b7be4) at pthread_mutex_lock.c:61
#1  0xb76562b4 in pthread_mutex_lock (mutex=0xa9b7be4) at forward.c:182
#2  0xb2ed8eda in g_main_context_acquire (context=0xa9b7be0) at /build/buildd/glib2.0-2.30.0/./glib/gmain.c:2528
#3  0xb2eda56d in g_main_context_iterate (context=0xa9b7be0, block=1, dispatch=1, self=<optimized out>) at /build/buildd/glib2.0-2.30.0/./glib/gmain.c:3033
#4  0xb2edac2a in g_main_context_iteration (context=0xa9b7be0, may_block=1) at /build/buildd/glib2.0-2.30.0/./glib/gmain.c:3152
#5  0xb648eb37 in QEventDispatcherGlib::processEvents (this=0xa9b74f8, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#6  0xb645f1dd in QEventLoop::processEvents (this=0xa73d42a0, flags=...) at kernel/qeventloop.cpp:149
#7  0xb645f421 in QEventLoop::exec (this=0xa73d42a0, flags=...) at kernel/qeventloop.cpp:201
#8  0xb636290b in QThread::exec (this=0xa98e628) at thread/qthread.cpp:498
#9  0xb643fe2d in QInotifyFileSystemWatcherEngine::run (this=0xa98e628) at io/qfilesystemwatcher_inotify.cpp:248
#10 0xb63657b3 in QThreadPrivate::start (arg=0xa98e628) at thread/qthread_unix.cpp:331
#11 0xb2ff4d31 in start_thread (arg=0xa73d4b70) at pthread_create.c:304
#12 0xb764846e in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:130
Backtrace stopped: Not enough registers or memory available to unwind further

Thread 2 (Thread 0xa6775b70 (LWP 3282)):
#0  do_gettime (frac=0xa6775010, sec=0xa6775008) at tools/qelapsedtimer_unix.cpp:121
#1  qt_gettime () at tools/qelapsedtimer_unix.cpp:140
#2  0xb648f4b6 in QTimerInfoList::updateCurrentTime (this=0xaba1d4c) at kernel/qeventdispatcher_unix.cpp:339
#3  0xb648f80a in QTimerInfoList::timerWait (this=0xaba1d4c, tm=...) at kernel/qeventdispatcher_unix.cpp:442
#4  0xb648e053 in timerSourcePrepareHelper (src=<optimized out>, timeout=0xa677511c) at kernel/qeventdispatcher_glib.cpp:136
#5  0xb648e0ed in timerSourcePrepare (source=0xaba1d18, timeout=<optimized out>) at kernel/qeventdispatcher_glib.cpp:169
#6  0xb2ed988c in g_main_context_prepare (context=0xaba1488, priority=0xa6775178) at /build/buildd/glib2.0-2.30.0/./glib/gmain.c:2762
#7  0xb2eda637 in g_main_context_iterate (context=0xaba1488, block=1, dispatch=1, self=<optimized out>) at /build/buildd/glib2.0-2.30.0/./glib/gmain.c:3069
#8  0xb2edac2a in g_main_context_iteration (context=0xaba1488, may_block=1) at /build/buildd/glib2.0-2.30.0/./glib/gmain.c:3152
#9  0xb648eb37 in QEventDispatcherGlib::processEvents (this=0xaba0dc0, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#10 0xb645f1dd in QEventLoop::processEvents (this=0xa67752a0, flags=...) at kernel/qeventloop.cpp:149
#11 0xb645f421 in QEventLoop::exec (this=0xa67752a0, flags=...) at kernel/qeventloop.cpp:201
#12 0xb636290b in QThread::exec (this=0xab9f7b0) at thread/qthread.cpp:498
#13 0xb643fe2d in QInotifyFileSystemWatcherEngine::run (this=0xab9f7b0) at io/qfilesystemwatcher_inotify.cpp:248
#14 0xb63657b3 in QThreadPrivate::start (arg=0xab9f7b0) at thread/qthread_unix.cpp:331
#15 0xb2ff4d31 in start_thread (arg=0xa6775b70) at pthread_create.c:304
#16 0xb764846e in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:130
Backtrace stopped: Not enough registers or memory available to unwind further

Thread 1 (Thread 0xb1ebeb20 (LWP 3275)):
[KCrash Handler]
#7  TaskManager::Task::classClass (this=0x0) at ../../../libs/taskmanager/task_x11.cpp:74
#8  0xb0a01789 in TaskManager::ToggleLauncherActionImpl::ToggleLauncherActionImpl (this=0xe88f6e0, parent=0xed16818, item=0xbec2d68, strategy=0xa825be0) at ../../../libs/taskmanager/taskactions.cpp:351
#9  0xb0a01ceb in TaskManager::AdvancedMenu::AdvancedMenu (this=0xed16818, parent=0xbeb16a8, item=0xbec2d68, strategy=0xa825be0) at ../../../libs/taskmanager/taskactions.cpp:295
#10 0xb0a02b4b in TaskManager::BasicMenu::BasicMenu (this=0xbeb16a8, parent=0xbff57ae4, item=0xbec2d68, strategy=0xa825be0, visualizationActions=...) at ../../../libs/taskmanager/taskactions.cpp:440
#11 0xb0a0325b in TaskManager::BasicMenu::BasicMenu (this=0xbff57ae4, parent=0x0, group=0xb845238, strategy=0xa825be0, visualizationActions=...) at ../../../libs/taskmanager/taskactions.cpp:462
#12 0xb09c728f in contextMenuEvent (e=0xbff5808c, this=0xee071d8) at ../../../../../plasma/desktop/applets/tasks/taskgroupitem.cpp:440
#13 TaskGroupItem::contextMenuEvent (this=0xee071d8, e=0xbff5808c) at ../../../../../plasma/desktop/applets/tasks/taskgroupitem.cpp:408
#14 0xb5fed833 in QGraphicsItem::sceneEvent (this=0xee071e0, event=0xbff5808c) at graphicsview/qgraphicsitem.cpp:6700
#15 0xb604a856 in QGraphicsWidget::sceneEvent (this=0xee071d8, event=0xbff5808c) at graphicsview/qgraphicswidget.cpp:1223
#16 0xb6016cce in sendEvent (event=0xbff5808c, item=0xee071e0, this=<optimized out>) at graphicsview/qgraphicsscene.cpp:1217
#17 QGraphicsScenePrivate::sendEvent (this=0x9c0ab30, item=0xee071e0, event=0xbff5808c) at graphicsview/qgraphicsscene.cpp:1193
#18 0xb6017448 in QGraphicsScene::contextMenuEvent (this=0x9c07e18, contextMenuEvent=0xbff5808c) at graphicsview/qgraphicsscene.cpp:3609
#19 0xb6026b0c in QGraphicsScene::event (this=0x9c07e18, event=0xbff5808c) at graphicsview/qgraphicsscene.cpp:3407
#20 0xb598bd84 in notify_helper (e=0xbff5808c, receiver=0x9c07e18, this=0x9b02770) at kernel/qapplication.cpp:4486
#21 QApplicationPrivate::notify_helper (this=0x9b02770, receiver=0x9c07e18, e=0xbff5808c) at kernel/qapplication.cpp:4458
#22 0xb5991133 in QApplication::notify (this=0xbff5808c, receiver=0x9c07e18, e=0xbff5808c) at kernel/qapplication.cpp:3886
#23 0xb6ac5971 in KApplication::notify (this=0x9af96b8, receiver=0x9c07e18, event=0xbff5808c) at ../../kdeui/kernel/kapplication.cpp:311
#24 0xb646019e in QCoreApplication::notifyInternal (this=0x9af96b8, receiver=0x9c07e18, event=0xbff5808c) at kernel/qcoreapplication.cpp:787
#25 0xb603f206 in sendEvent (event=0xbff5807c, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#26 QGraphicsView::contextMenuEvent (this=0xb2e2458, event=0xbff58644) at graphicsview/qgraphicsview.cpp:2890
#27 0xb59e6d53 in QWidget::event (this=0xb2e2458, event=0xbff58644) at kernel/qwidget.cpp:8462
#28 0xb5deb285 in QFrame::event (this=0xb2e2458, e=0xbff58644) at widgets/qframe.cpp:557
#29 0xb5e7d821 in QAbstractScrollArea::viewportEvent (this=0xb2e2458, e=0xbff58644) at widgets/qabstractscrollarea.cpp:1043
#30 0xb6048d04 in QGraphicsView::viewportEvent (this=0xb2e2458, event=0xbff58644) at graphicsview/qgraphicsview.cpp:2864
#31 0xb5e7ff36 in viewportEvent (this=<optimized out>, event=0xbff58644) at widgets/qabstractscrollarea_p.h:100
#32 eventFilter (e=0xbff58644, this=<optimized out>, o=<optimized out>) at widgets/qabstractscrollarea_p.h:116
#33 QAbstractScrollAreaFilter::eventFilter (this=0x9ec9730, o=0xa529d20, e=0xbff58644) at widgets/qabstractscrollarea_p.h:115
#34 0xb6460336 in QCoreApplicationPrivate::sendThroughObjectEventFilters (this=0x9b02770, receiver=0xa529d20, event=0xbff58644) at kernel/qcoreapplication.cpp:902
#35 0xb598bd52 in notify_helper (e=0xbff58644, receiver=0xa529d20, this=0x9b02770) at kernel/qapplication.cpp:4482
#36 QApplicationPrivate::notify_helper (this=0x9b02770, receiver=0xa529d20, e=0xbff58644) at kernel/qapplication.cpp:4458
#37 0xb59917c4 in QApplication::notify (this=0xa529d20, receiver=0xa529d20, e=0xbff58644) at kernel/qapplication.cpp:4126
#38 0xb6ac5971 in KApplication::notify (this=0x9af96b8, receiver=0xa529d20, event=0xbff58644) at ../../kdeui/kernel/kapplication.cpp:311
#39 0xb646019e in QCoreApplication::notifyInternal (this=0x9af96b8, receiver=0xa529d20, event=0xbff58644) at kernel/qcoreapplication.cpp:787
#40 0xb5a19385 in sendSpontaneousEvent (event=0xbff58644, receiver=0xa529d20) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:218
#41 QETWidget::translateMouseEvent (this=0xb2e2458, event=0xbff58a9c) at kernel/qapplication_x11.cpp:4576
#42 0xb5a17e8d in QApplication::x11ProcessEvent (this=0x9af96b8, event=0xbff58a9c) at kernel/qapplication_x11.cpp:3693
#43 0xb5a4428c in x11EventSourceDispatch (s=0x9b058a8, callback=0, user_data=0x0) at kernel/qguieventdispatcher_glib.cpp:146
#44 0xb2eda25f in g_main_dispatch (context=0x9b05b48) at /build/buildd/glib2.0-2.30.0/./glib/gmain.c:2441
#45 g_main_context_dispatch (context=0x9b05b48) at /build/buildd/glib2.0-2.30.0/./glib/gmain.c:3011
#46 0xb2eda990 in g_main_context_iterate (context=0x9b05b48, block=-1292987616, dispatch=1, self=<optimized out>) at /build/buildd/glib2.0-2.30.0/./glib/gmain.c:3089
#47 0xb2edac2a in g_main_context_iteration (context=0x9b05b48, may_block=1) at /build/buildd/glib2.0-2.30.0/./glib/gmain.c:3152
#48 0xb648eada in QEventDispatcherGlib::processEvents (this=0x9b00de8, flags=...) at kernel/qeventdispatcher_glib.cpp:422
#49 0xb5a43e7a in QGuiEventDispatcherGlib::processEvents (this=0x9b00de8, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#50 0xb645f1dd in QEventLoop::processEvents (this=0xbff58da4, flags=...) at kernel/qeventloop.cpp:149
#51 0xb645f421 in QEventLoop::exec (this=0xbff58da4, flags=...) at kernel/qeventloop.cpp:201
#52 0xb646419d in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1064
#53 0xb5989924 in QApplication::exec () at kernel/qapplication.cpp:3760
#54 0xb774518b in kdemain (argc=1, argv=0xbff58fa4) at ../../../../plasma/desktop/shell/main.cpp:120
#55 0x0804850b in main (argc=1, argv=0xbff58fa4) at plasma-desktop_dummy.cpp:3

This bug may be a duplicate of or related to bug 277033.

Possible duplicates by query: bug 289013, bug 288256, bug 287915, bug 287329, bug 285858.

Reported using DrKonqi