Application: plasma-desktop (0.4)
KDE Platform Version: 4.7.3 (4.7.3)
Qt Version: 4.7.4
Operating System: Linux 3.1.0-46-desktop x86_64
Distribution: "openSUSE 11.4 (x86_64)"

-- Information about the crash:
- What I was doing when the application crashed:
I did my normal work, each time the crash happens in different situations.
I remember, that the crash happened once if I closed the Pidgin Buddy List (to systray), another time the Kopete Contact list. Sometimes the crash happened when I was absent and did not do any input action.
- Unusual behavior I noticed:
Mostly, Plasma crashes and restarts automatically, sometimes I get the Crash Reporting Assistant, and one time I recognized a crash and during Plasma restart immediately another crash, resulting in Plasma not coming up again at all.

The crash can be reproduced some of the time.

-- Backtrace:
Application: Plasma Desktop Shell (kdeinit4), signal: Segmentation fault
[Current thread is 1 (Thread 0x7f200f004760 (LWP 3991))]

Thread 2 (Thread 0x7f1fecc29700 (LWP 3992)):
#0  0x00007f20094f50b6 in g_main_context_prepare () from /lib64/libglib-2.0.so.0
#1  0x00007f20094f5fa9 in ?? () from /lib64/libglib-2.0.so.0
#2  0x00007f20094f6650 in g_main_context_iteration () from /lib64/libglib-2.0.so.0
#3  0x00007f200dc9d636 in QEventDispatcherGlib::processEvents (this=0x10a9510, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:424
#4  0x00007f200dc71c22 in QEventLoop::processEvents (this=<value optimized out>, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007f200dc71e35 in QEventLoop::exec (this=0x7f1fecc28de0, flags=...) at kernel/qeventloop.cpp:201
#6  0x00007f200db86be4 in QThread::exec (this=<value optimized out>) at thread/qthread.cpp:498
#7  0x00007f200dc53358 in QInotifyFileSystemWatcherEngine::run (this=0x10a9470) at io/qfilesystemwatcher_inotify.cpp:248
#8  0x00007f200db894d5 in QThreadPrivate::start (arg=0x10a9470) at thread/qthread_unix.cpp:331
#9  0x00007f200d8f8a3f in start_thread () from /lib64/libpthread.so.0
#10 0x00007f200c6a866d in clone () from /lib64/libc.so.6
#11 0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7f200f004760 (LWP 3991)):
[KCrash Handler]
#6  operator== (this=0x1b40840) at /usr/include/QtCore/qbasicatomic.h:70
#7  isNull (this=0x1b40840) at /usr/include/QtCore/qsharedpointer_impl.h:568
#8  operator! (this=0x1b40840) at /usr/include/QtCore/qsharedpointer_impl.h:574
#9  TaskManager::TaskItem::task (this=0x1b40840) at /usr/src/debug/kde-workspace-4.7.3/libs/taskmanager/taskitem.cpp:113
#10 0x00007f1ff442a292 in WindowTaskItem::publishIconGeometry (this=0x1b7e360) at /usr/src/debug/kde-workspace-4.7.3/plasma/desktop/applets/tasks/windowtaskitem.cpp:120
#11 0x00007f1ff44375ec in AbstractTaskItem::timerEvent (this=0x1b7e360, event=<value optimized out>) at /usr/src/debug/kde-workspace-4.7.3/plasma/desktop/applets/tasks/abstracttaskitem.cpp:439
#12 0x00007f200dc864d9 in QObject::event (this=0x1b7e360, e=<value optimized out>) at kernel/qobject.cpp:1190
#13 0x00007f200d437b0b in QGraphicsWidget::event (this=0x1b7e360, event=0x7fff9591a0a0) at graphicsview/qgraphicswidget.cpp:1455
#14 0x00007f200ce18264 in QApplicationPrivate::notify_helper (this=0x716790, receiver=0x1b7e360, e=0x7fff9591a0a0) at kernel/qapplication.cpp:4481
#15 0x00007f200ce2081a in QApplication::notify (this=<value optimized out>, receiver=0x1b7e360, e=0x7fff9591a0a0) at kernel/qapplication.cpp:4360
#16 0x00007f200e9fdae6 in KApplication::notify (this=0x70d670, receiver=0x1b7e360, event=0x7fff9591a0a0) at /usr/src/debug/kdelibs-4.7.3/kdeui/kernel/kapplication.cpp:311
#17 0x00007f200dc727cc in QCoreApplication::notifyInternal (this=0x70d670, receiver=0x1b7e360, event=0x7fff9591a0a0) at kernel/qcoreapplication.cpp:787
#18 0x00007f200dca0198 in sendEvent (this=0x712110) at kernel/qcoreapplication.h:215
#19 QTimerInfoList::activateTimers (this=0x712110) at kernel/qeventdispatcher_unix.cpp:618
#20 0x00007f200dc9cf04 in timerSourceDispatch (source=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:184
#21 0x00007f20094f5bd3 in g_main_context_dispatch () from /lib64/libglib-2.0.so.0
#22 0x00007f20094f63b0 in ?? () from /lib64/libglib-2.0.so.0
#23 0x00007f20094f6650 in g_main_context_iteration () from /lib64/libglib-2.0.so.0
#24 0x00007f200dc9d5df in QEventDispatcherGlib::processEvents (this=0x715280, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:422
#25 0x00007f200cebe38e in QGuiEventDispatcherGlib::processEvents (this=<value optimized out>, flags=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:204
#26 0x00007f200dc71c22 in QEventLoop::processEvents (this=<value optimized out>, flags=...) at kernel/qeventloop.cpp:149
#27 0x00007f200dc71e35 in QEventLoop::exec (this=0x7fff9591a3b0, flags=...) at kernel/qeventloop.cpp:201
#28 0x00007f200dc7627b in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1064
#29 0x00007f1ffca2025d in kdemain (argc=1, argv=0x68e4c0) at /usr/src/debug/kde-workspace-4.7.3/plasma/desktop/shell/main.cpp:120
#30 0x0000000000407279 in _start ()

Possible duplicates by query: bug 286211, bug 285913, bug 272495, bug 267077.

Reported using DrKonqi