Application: plasma-desktop (0.4)
KDE Platform Version: 4.7.3 (4.7.3)
Qt Version: 4.7.4
Operating System: Linux 3.0.0-13-generic x86_64
Distribution: Ubuntu 11.10

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

Logging out
Almost every time I log out from KDE, it crashes.

The crash can be reproduced some of the time.

-- Backtrace:
Application: Plasma Desktop Shell (plasma-desktop), signal: Segmentation fault
[Current thread is 1 (Thread 0x7f34e29b67a0 (LWP 6604))]

Thread 3 (Thread 0x7f34befcd700 (LWP 6605)):
#0  0x00007f34d733c034 in __pthread_mutex_lock (mutex=0x1ef5ce8) at pthread_mutex_lock.c:61
#1  0x00007f34d682c023 in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f34d682cdfd in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f34d682d429 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f34df493f3e in QEventDispatcherGlib::processEvents (this=0x1ef40e0, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:424
#5  0x00007f34df467cf2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#6  0x00007f34df467ef7 in QEventLoop::exec (this=0x7f34befccdb0, flags=...) at kernel/qeventloop.cpp:201
#7  0x00007f34df37f27f in QThread::exec (this=<optimized out>) at thread/qthread.cpp:498
#8  0x00007f34df44acbf in QInotifyFileSystemWatcherEngine::run (this=0x1eef200) at io/qfilesystemwatcher_inotify.cpp:248
#9  0x00007f34df381d05 in QThreadPrivate::start (arg=0x1eef200) at thread/qthread_unix.cpp:331
#10 0x00007f34d7339efc in start_thread (arg=0x7f34befcd700) at pthread_create.c:304
#11 0x00007f34e22ae89d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#12 0x0000000000000000 in ?? ()

Thread 2 (Thread 0x7f34bcd8d700 (LWP 6606)):
#0  0x00007f34e22a2773 in __GI___poll (fds=<optimized out>, nfds=<optimized out>, timeout=<optimized out>) at ../sysdeps/unix/sysv/linux/poll.c:87
#1  0x00007f34d682cf68 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f34d682d429 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f34df493f3e in QEventDispatcherGlib::processEvents (this=0x1f0b2e0, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:424
#4  0x00007f34df467cf2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007f34df467ef7 in QEventLoop::exec (this=0x7f34bcd8cdb0, flags=...) at kernel/qeventloop.cpp:201
#6  0x00007f34df37f27f in QThread::exec (this=<optimized out>) at thread/qthread.cpp:498
#7  0x00007f34df44acbf in QInotifyFileSystemWatcherEngine::run (this=0x1f0a930) at io/qfilesystemwatcher_inotify.cpp:248
#8  0x00007f34df381d05 in QThreadPrivate::start (arg=0x1f0a930) at thread/qthread_unix.cpp:331
#9  0x00007f34d7339efc in start_thread (arg=0x7f34bcd8d700) at pthread_create.c:304
#10 0x00007f34e22ae89d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#11 0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7f34e29b67a0 (LWP 6604)):
[KCrash Handler]
#6  0x00000000017200b8 in ?? ()
#7  0x00007f34c7718b96 in TaskGroupItem::~TaskGroupItem (this=0x1e7dbc0, __in_chrg=<optimized out>) at ../../../../../plasma/desktop/applets/tasks/taskgroupitem.cpp:82
#8  0x00007f34c7718c59 in TaskGroupItem::~TaskGroupItem (this=0x1e7dbc0, __in_chrg=<optimized out>) at ../../../../../plasma/desktop/applets/tasks/taskgroupitem.cpp:84
#9  0x00007f34df47fa88 in QObject::event (this=0x1e7dbc0, e=<optimized out>) at kernel/qobject.cpp:1200
#10 0x00007f34dee3789b in QGraphicsWidget::event (this=0x1e7dbc0, event=0x2c9fa80) at graphicsview/qgraphicswidget.cpp:1455
#11 0x00007f34de819424 in notify_helper (e=0x2c9fa80, receiver=0x1e7dbc0, this=0x15703a0) at kernel/qapplication.cpp:4486
#12 QApplicationPrivate::notify_helper (this=0x15703a0, receiver=0x1e7dbc0, e=0x2c9fa80) at kernel/qapplication.cpp:4458
#13 0x00007f34de81e291 in QApplication::notify (this=0x15542b0, receiver=0x1e7dbc0, e=0x2c9fa80) at kernel/qapplication.cpp:4365
#14 0x00007f34e0117126 in KApplication::notify (this=0x15542b0, receiver=0x1e7dbc0, event=0x2c9fa80) at ../../kdeui/kernel/kapplication.cpp:311
#15 0x00007f34df468afc in QCoreApplication::notifyInternal (this=0x15542b0, receiver=0x1e7dbc0, event=0x2c9fa80) at kernel/qcoreapplication.cpp:787
#16 0x00007f34df46c51f in sendEvent (event=0x2c9fa80, receiver=0x1e7dbc0) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#17 QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=52, data=0x14ec430) at kernel/qcoreapplication.cpp:1428
#18 0x00007f34df46c7c4 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1071
#19 0x00007f34e25ad1a3 in kdemain (argc=1, argv=0x7fffc7f8f558) at ../../../../plasma/desktop/shell/main.cpp:120
#20 0x00007f34e21ee30d in __libc_start_main (main=0x400640 <main(int, char**)>, argc=1, ubp_av=0x7fffc7f8f558, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fffc7f8f548) at libc-start.c:226
#21 0x0000000000400671 in _start ()

This bug may be a duplicate of or related to bug 287459, bug 275286.

Possible duplicates by query: bug 287517, bug 287502, bug 287475, bug 287459, bug 287442.

Reported using DrKonqi