Application: plasma-desktop (0.4)
KDE Platform Version: 4.6.2 (4.6.2)
Qt Version: 4.7.2
Operating System: Linux 2.6.38-10-generic i686
Distribution: Ubuntu 11.04

-- Information about the crash:
- What I was doing when the application crashed:

I clicked on the kde menü to choose an application until i found, that the helpsysmbol 
is on the mouse coursor. I clicked with the help symbol on the on the desktop to drop it on the desktop. So it crashed. This was the  second time this happens without clicking with the right mouse button on the menü (kmenü) to drag and drop the symbol.
In both cases the plasma desktop crashed and in both cases i clicked only the left mouse button, not the right to drag and drop...

The crash can be reproduced some of the time.

-- Backtrace:
Application: Plasma-Desktop-Umgebung (plasma-desktop), signal: Segmentation fault
[Current thread is 1 (Thread 0xb5f9f720 (LWP 22858))]

Thread 4 (Thread 0xb3af5b70 (LWP 22859)):
#0  0x00db4d41 in clock_gettime () from /lib/i386-linux-gnu/librt.so.1
#1  0x039aadd8 in do_gettime () at tools/qelapsedtimer_unix.cpp:123
#2  qt_gettime () at tools/qelapsedtimer_unix.cpp:140
#3  0x03a774f2 in updateCurrentTime (this=0x8bf1ac4, tm=...) at kernel/qeventdispatcher_unix.cpp:339
#4  QTimerInfoList::timerWait (this=0x8bf1ac4, tm=...) at kernel/qeventdispatcher_unix.cpp:442
#5  0x03a75d32 in timerSourcePrepareHelper (src=<value optimized out>, timeout=0xb3af50cc) at kernel/qeventdispatcher_glib.cpp:136
#6  0x03a75dcd in timerSourcePrepare (source=0x8bf1a90, timeout=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:169
#7  0x0298dfd4 in g_main_context_prepare () from /lib/i386-linux-gnu/libglib-2.0.so.0
#8  0x0298ee63 in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#9  0x0298f524 in g_main_context_iteration () from /lib/i386-linux-gnu/libglib-2.0.so.0
#10 0x03a76577 in QEventDispatcherGlib::processEvents (this=0x8bf0cc8, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#11 0x03a48289 in QEventLoop::processEvents (this=0xb3af5280, flags=...) at kernel/qeventloop.cpp:149
#12 0x03a48522 in QEventLoop::exec (this=0xb3af5280, flags=...) at kernel/qeventloop.cpp:201
#13 0x039522a0 in QThread::exec (this=0x8bee778) at thread/qthread.cpp:492
#14 0x03a29fdb in QInotifyFileSystemWatcherEngine::run (this=0x8bee778) at io/qfilesystemwatcher_inotify.cpp:248
#15 0x03954da2 in QThreadPrivate::start (arg=0x8bee778) at thread/qthread_unix.cpp:320
#16 0x03dace99 in start_thread () from /lib/i386-linux-gnu/libpthread.so.0
#17 0x007a273e in clone () from /lib/i386-linux-gnu/libc.so.6

Thread 3 (Thread 0xacbeeb70 (LWP 22861)):
#0  0x00db4d41 in clock_gettime () from /lib/i386-linux-gnu/librt.so.1
#1  0x039aadd8 in do_gettime () at tools/qelapsedtimer_unix.cpp:123
#2  qt_gettime () at tools/qelapsedtimer_unix.cpp:140
#3  0x03a774f2 in updateCurrentTime (this=0x8c9ce34, tm=...) at kernel/qeventdispatcher_unix.cpp:339
#4  QTimerInfoList::timerWait (this=0x8c9ce34, tm=...) at kernel/qeventdispatcher_unix.cpp:442
#5  0x03a75d32 in timerSourcePrepareHelper (src=<value optimized out>, timeout=0xacbee0cc) at kernel/qeventdispatcher_glib.cpp:136
#6  0x03a75dcd in timerSourcePrepare (source=0x8c9ce00, timeout=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:169
#7  0x0298dfd4 in g_main_context_prepare () from /lib/i386-linux-gnu/libglib-2.0.so.0
#8  0x0298ee63 in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#9  0x0298f524 in g_main_context_iteration () from /lib/i386-linux-gnu/libglib-2.0.so.0
#10 0x03a76577 in QEventDispatcherGlib::processEvents (this=0x8c05e38, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#11 0x03a48289 in QEventLoop::processEvents (this=0xacbee280, flags=...) at kernel/qeventloop.cpp:149
#12 0x03a48522 in QEventLoop::exec (this=0xacbee280, flags=...) at kernel/qeventloop.cpp:201
#13 0x039522a0 in QThread::exec (this=0x8c268d0) at thread/qthread.cpp:492
#14 0x03a29fdb in QInotifyFileSystemWatcherEngine::run (this=0x8c268d0) at io/qfilesystemwatcher_inotify.cpp:248
#15 0x03954da2 in QThreadPrivate::start (arg=0x8c268d0) at thread/qthread_unix.cpp:320
#16 0x03dace99 in start_thread () from /lib/i386-linux-gnu/libpthread.so.0
#17 0x007a273e in clone () from /lib/i386-linux-gnu/libc.so.6

Thread 2 (Thread 0xabbd0b70 (LWP 22866)):
#0  0x00793f78 in poll () from /lib/i386-linux-gnu/libc.so.6
#1  0x0299f84b in g_poll () from /lib/i386-linux-gnu/libglib-2.0.so.0
#2  0x0298f1af in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#3  0x0298f92b in g_main_loop_run () from /lib/i386-linux-gnu/libglib-2.0.so.0
#4  0x04609304 in ?? () from /usr/lib/i386-linux-gnu/libgio-2.0.so.0
#5  0x029b82df in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#6  0x03dace99 in start_thread () from /lib/i386-linux-gnu/libpthread.so.0
#7  0x007a273e in clone () from /lib/i386-linux-gnu/libc.so.6

Thread 1 (Thread 0xb5f9f720 (LWP 22858)):
[KCrash Handler]
#7  QDragManager::move (this=0x8ff7858, globalPos=...) at kernel/qdnd_x11.cpp:1608
#8  0x0665e4cf in QDragManager::eventFilter (this=0x8ff7858, o=0x94faae0, e=0xbff4cf34) at kernel/qdnd_x11.cpp:1306
#9  0x065c8e19 in QApplication::notify (this=0x8865198, receiver=0x94faae0, e=0xbff4cf34) at kernel/qapplication.cpp:4017
#10 0x010093ca in KApplication::notify (this=0x8865198, receiver=0x94faae0, event=0xbff4cf34) at ../../kdeui/kernel/kapplication.cpp:311
#11 0x03a490bb in QCoreApplication::notifyInternal (this=0x8865198, receiver=0x94faae0, event=0xbff4cf34) at kernel/qcoreapplication.cpp:731
#12 0x065c3c3b in sendSpontaneousEvent (receiver=0x94faae0, event=0xbff4cf34, alienWidget=0x0, nativeWidget=0x94faae0, buttonDown=0x6f11c60, lastMouseReceiver=..., spontaneous=true) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:218
#13 QApplicationPrivate::sendMouseEvent (receiver=0x94faae0, event=0xbff4cf34, alienWidget=0x0, nativeWidget=0x94faae0, buttonDown=0x6f11c60, lastMouseReceiver=..., spontaneous=true) at kernel/qapplication.cpp:3120
#14 0x0664f04c in QETWidget::translateMouseEvent (this=0x94faae0, event=0xbff4d45c) at kernel/qapplication_x11.cpp:4558
#15 0x0664d9b5 in QApplication::x11ProcessEvent (this=0x8865198, event=0xbff4d45c) at kernel/qapplication_x11.cpp:3680
#16 0x066795f4 in x11EventSourceDispatch (s=0x8872850, callback=0, user_data=0x0) at kernel/qguieventdispatcher_glib.cpp:146
#17 0x0298eaa8 in g_main_context_dispatch () from /lib/i386-linux-gnu/libglib-2.0.so.0
#18 0x0298f270 in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#19 0x0298f524 in g_main_context_iteration () from /lib/i386-linux-gnu/libglib-2.0.so.0
#20 0x03a7653c in QEventDispatcherGlib::processEvents (this=0x87f7aa8, flags=...) at kernel/qeventdispatcher_glib.cpp:422
#21 0x066791e5 in QGuiEventDispatcherGlib::processEvents (this=0x87f7aa8, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#22 0x03a48289 in QEventLoop::processEvents (this=0x93fa390, flags=...) at kernel/qeventloop.cpp:149
#23 0x03a48522 in QEventLoop::exec (this=0x93fa390, flags=...) at kernel/qeventloop.cpp:201
#24 0x0665e199 in QDragManager::drag (this=0x8ff7858, o=0x917f7a0) at kernel/qdnd_x11.cpp:1981
#25 0x065d5d6e in QDrag::exec (this=0x917f7a0, supportedActions=..., defaultDropAction=Qt::IgnoreAction) at kernel/qdrag.cpp:284
#26 0x06b47047 in QAbstractItemView::startDrag (this=0x8fe0028, supportedActions=...) at itemviews/qabstractitemview.cpp:3448
#27 0x03ccb904 in Kickoff::FlipScrollView::startDrag (this=0x8fe0028, supportedActions=...) at ../../../../../plasma/desktop/applets/kickoff/ui/flipscrollview.cpp:718
#28 0x06b45d32 in QAbstractItemView::mouseMoveEvent (this=0x8fe0028, event=0xbff4e344) at itemviews/qabstractitemview.cpp:1709
#29 0x03cc5fbb in Kickoff::FlipScrollView::mouseMoveEvent (this=0x8fe0028, event=0xbff4e344) at ../../../../../plasma/desktop/applets/kickoff/ui/flipscrollview.cpp:518
#30 0x0661b172 in QWidget::event (this=0x8fe0028, event=0xbff4e344) at kernel/qwidget.cpp:8244
#31 0x06a0f9f3 in QFrame::event (this=0x8fe0028, e=0xbff4e344) at widgets/qframe.cpp:557
#32 0x06a9e062 in QAbstractScrollArea::viewportEvent (this=0x8fe0028, e=0xbff4e344) at widgets/qabstractscrollarea.cpp:1043
#33 0x06b3d227 in QAbstractItemView::viewportEvent (this=0x8fe0028, event=0xbff4e344) at itemviews/qabstractitemview.cpp:1628
#34 0x06aa0965 in viewportEvent (this=0x8fe4db8, o=0x8fe12d8, e=0xbff4e344) at widgets/qabstractscrollarea_p.h:100
#35 QAbstractScrollAreaFilter::eventFilter (this=0x8fe4db8, o=0x8fe12d8, e=0xbff4e344) at widgets/qabstractscrollarea_p.h:116
#36 0x03a4925a in QCoreApplicationPrivate::sendThroughObjectEventFilters (this=0x886fc60, receiver=0x8fe12d8, event=0xbff4e344) at kernel/qcoreapplication.cpp:846
#37 0x065c2d00 in QApplicationPrivate::notify_helper (this=0x886fc60, receiver=0x8fe12d8, e=0xbff4e344) at kernel/qapplication.cpp:4458
#38 0x065c8201 in QApplication::notify (this=0x8865198, receiver=0x8fe12d8, e=0xbff4e344) at kernel/qapplication.cpp:4023
#39 0x010093ca in KApplication::notify (this=0x8865198, receiver=0x8fe12d8, event=0xbff4e344) at ../../kdeui/kernel/kapplication.cpp:311
#40 0x03a490bb in QCoreApplication::notifyInternal (this=0x8865198, receiver=0x8fe12d8, event=0xbff4e344) at kernel/qcoreapplication.cpp:731
#41 0x065c3c3b in sendSpontaneousEvent (receiver=0x8fe12d8, event=0xbff4e344, alienWidget=0x8fe12d8, nativeWidget=0x902a198, buttonDown=0x6f11c60, lastMouseReceiver=..., spontaneous=true) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:218
#42 QApplicationPrivate::sendMouseEvent (receiver=0x8fe12d8, event=0xbff4e344, alienWidget=0x8fe12d8, nativeWidget=0x902a198, buttonDown=0x6f11c60, lastMouseReceiver=..., spontaneous=true) at kernel/qapplication.cpp:3120
#43 0x0664f04c in QETWidget::translateMouseEvent (this=0x902a198, event=0xbff4e86c) at kernel/qapplication_x11.cpp:4558
#44 0x0664d9b5 in QApplication::x11ProcessEvent (this=0x8865198, event=0xbff4e86c) at kernel/qapplication_x11.cpp:3680
#45 0x066795f4 in x11EventSourceDispatch (s=0x8872850, callback=0, user_data=0x0) at kernel/qguieventdispatcher_glib.cpp:146
#46 0x0298eaa8 in g_main_context_dispatch () from /lib/i386-linux-gnu/libglib-2.0.so.0
#47 0x0298f270 in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#48 0x0298f524 in g_main_context_iteration () from /lib/i386-linux-gnu/libglib-2.0.so.0
#49 0x03a7653c in QEventDispatcherGlib::processEvents (this=0x87f7aa8, flags=...) at kernel/qeventdispatcher_glib.cpp:422
#50 0x066791e5 in QGuiEventDispatcherGlib::processEvents (this=0x87f7aa8, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#51 0x03a48289 in QEventLoop::processEvents (this=0xbff4eb34, flags=...) at kernel/qeventloop.cpp:149
#52 0x03a48522 in QEventLoop::exec (this=0xbff4eb34, flags=...) at kernel/qeventloop.cpp:201
#53 0x03a4cecc in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1008
#54 0x065c08e7 in QApplication::exec () at kernel/qapplication.cpp:3736
#55 0x00def5a5 in kdemain (argc=1, argv=0xbff4ed44) at ../../../../plasma/desktop/shell/main.cpp:118
#56 0x080485cb in main (argc=1, argv=0xbff4ed44) at plasma-desktop_dummy.cpp:3

Possible duplicates by query: bug 279574, bug 279511, bug 276292, bug 275523, bug 275373.

Reported using DrKonqi