Application: plasma-desktop (0.4)
KDE Platform Version: 4.7.3 (4.7.3)
Qt Version: 4.8.0
Operating System: Linux 3.1.2-1.fc16.x86_64 x86_64
Distribution: "Fedora release 16 (Verne)"

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

Every time I shutdown, or reboot - KDE crashes.
It does not matter what is running, or not it always crashes.

The crash can be reproduced every time.

-- Backtrace:
Application: Plasma Desktop Shell (plasma-desktop), signal: Segmentation fault
Using host libthread_db library "/lib64/libthread_db.so.1".
82	T_PSEUDO (SYSCALL_SYMBOL, SYSCALL_NAME, SYSCALL_NARGS)
[Current thread is 1 (Thread 0x7f1dba9d3880 (LWP 1991))]

Thread 3 (Thread 0x7f1da5b4d700 (LWP 1997)):
#0  0x000000387580af8d in __pthread_mutex_unlock_usercnt (mutex=<optimized out>, decr=<optimized out>) at pthread_mutex_unlock.c:53
#1  __pthread_mutex_unlock (mutex=0x7f1da00009c8) at pthread_mutex_unlock.c:298
#2  0x00000038778436e7 in g_main_context_acquire (context=0x7f1da00009c0) at gmain.c:2526
#3  0x0000003877844da1 in g_main_context_iterate (context=0x7f1da00009c0, block=1, dispatch=1, self=<optimized out>) at gmain.c:3017
#4  0x000000387784544c in g_main_context_iteration (context=0x7f1da00009c0, may_block=1) at gmain.c:3136
#5  0x00000038801a6896 in QEventDispatcherGlib::processEvents (this=0x7f1da00008e0, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:426
#6  0x0000003880176c82 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#7  0x0000003880176ed7 in QEventLoop::exec (this=0x7f1da5b4cc10, flags=...) at kernel/qeventloop.cpp:204
#8  0x0000003880078ad7 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:501
#9  0x0000003880156a5f in QInotifyFileSystemWatcherEngine::run (this=0x228c340) at io/qfilesystemwatcher_inotify.cpp:248
#10 0x000000388007bb1b in QThreadPrivate::start (arg=0x228c340) at thread/qthread_unix.cpp:298
#11 0x00007f1dbcf952da in ?? () from /usr/lib64/nvidia/libGL.so.1
#12 0x0000003875807d90 in start_thread (arg=0x7f1da5b4d700) at pthread_create.c:309
#13 0x00000038750eed8d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:115

Thread 2 (Thread 0x7f1d977fe700 (LWP 2014)):
#0  0x00000038750e63f3 in __GI___poll (fds=<optimized out>, nfds=<optimized out>, timeout=<optimized out>) at ../sysdeps/unix/sysv/linux/poll.c:87
#1  0x0000003877844f88 in g_main_context_poll (n_fds=1, fds=0x7f1d84002030, priority=<optimized out>, timeout=-1, context=0x7f1d840009c0) at gmain.c:3386
#2  g_main_context_iterate (context=0x7f1d840009c0, block=<optimized out>, dispatch=1, self=<optimized out>) at gmain.c:3068
#3  0x000000387784544c in g_main_context_iteration (context=0x7f1d840009c0, may_block=1) at gmain.c:3136
#4  0x00000038801a6896 in QEventDispatcherGlib::processEvents (this=0x7f1d840008e0, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:426
#5  0x0000003880176c82 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#6  0x0000003880176ed7 in QEventLoop::exec (this=0x7f1d977fdc40, flags=...) at kernel/qeventloop.cpp:204
#7  0x0000003880078ad7 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:501
#8  0x000000388007bb1b in QThreadPrivate::start (arg=0x7f1d8c002b30) at thread/qthread_unix.cpp:298
#9  0x00007f1dbcf952da in ?? () from /usr/lib64/nvidia/libGL.so.1
#10 0x0000003875807d90 in start_thread (arg=0x7f1d977fe700) at pthread_create.c:309
#11 0x00000038750eed8d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:115

Thread 1 (Thread 0x7f1dba9d3880 (LWP 1991)):
[KCrash Handler]
#6  0x000000000179f45a in ?? ()
#7  0x00007f1daf11efc6 in TaskGroupItem::~TaskGroupItem (this=0x581ec60, __in_chrg=<optimized out>) at /usr/src/debug/kde-workspace-4.7.3/plasma/desktop/applets/tasks/taskgroupitem.cpp:82
#8  0x00007f1daf11f089 in TaskGroupItem::~TaskGroupItem (this=0x581ec60, __in_chrg=<optimized out>) at /usr/src/debug/kde-workspace-4.7.3/plasma/desktop/applets/tasks/taskgroupitem.cpp:84
#9  0x0000003880190a18 in QObject::event (this=0x581ec60, e=<optimized out>) at kernel/qobject.cpp:1175
#10 0x00000038833f9f1b in QGraphicsWidget::event (this=0x581ec60, event=0x4bfb7a0) at graphicsview/qgraphicswidget.cpp:1461
#11 0x0000003882dc96f4 in notify_helper (e=0x4bfb7a0, receiver=0x581ec60, this=0x15b45e0) at kernel/qapplication.cpp:4518
#12 QApplicationPrivate::notify_helper (this=0x15b45e0, receiver=0x581ec60, e=0x4bfb7a0) at kernel/qapplication.cpp:4490
#13 0x0000003882dce573 in QApplication::notify (this=0x15d0410, receiver=0x581ec60, e=0x4bfb7a0) at kernel/qapplication.cpp:4379
#14 0x0000003884850396 in KApplication::notify (this=0x15d0410, receiver=0x581ec60, event=0x4bfb7a0) at /usr/src/debug/kdelibs-4.7.3/kdeui/kernel/kapplication.cpp:311
#15 0x0000003880177b4c in QCoreApplication::notifyInternal (this=0x15d0410, receiver=0x581ec60, event=0x4bfb7a0) at kernel/qcoreapplication.cpp:876
#16 0x000000388017b5da in sendEvent (event=0x4bfb7a0, receiver=0x581ec60) at kernel/qcoreapplication.h:231
#17 QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=52, data=0x155ce40) at kernel/qcoreapplication.cpp:1500
#18 0x000000388017b90c in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1155
#19 0x000000388b441243 in kdemain (argc=1, argv=0x7fffdb2014f8) at /usr/src/debug/kde-workspace-4.7.3/plasma/desktop/shell/main.cpp:120
#20 0x000000387502169d in __libc_start_main (main=0x400850 <main(int, char**)>, argc=1, ubp_av=0x7fffdb2014f8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fffdb2014e8) at libc-start.c:226
#21 0x0000000000400881 in _start ()

Possible duplicates by query: bug 287659, bug 287619, bug 287586, bug 287517, bug 287502.

Reported using DrKonqi