Application: plasma-desktop (0.4)
KDE Platform Version: 4.7.2 (4.7.2)
Qt Version: 4.7.4
Operating System: Linux 3.0.0-14-generic x86_64
Distribution: Ubuntu 11.10

-- Information about the crash:
- What I was doing when the application crashed:
I tried to shutdown. Just thought it  going down, but it does not turn off, instead it stops, crashes...

- Unusual behavior I noticed:
Everything is just normal. This is a standard Kubuntu installation, acutal Version was installed from scratch

- Custom settings of the application:
Classik Menu instead of new KDE Start,Menu
Controls are on top instead of bottom
No Preview of Windows.

The crash can be reproduced every time.

-- Backtrace:
Application: Plasma-Desktop-Umgebung (plasma-desktop), signal: Segmentation fault
[Current thread is 1 (Thread 0x7fd71063f7a0 (LWP 2088))]

Thread 3 (Thread 0x7fd6ead0e700 (LWP 2093)):
#0  QTimerInfoList::updateCurrentTime (this=0x2925db0) at kernel/qeventdispatcher_unix.cpp:338
#1  0x00007fd70d110a33 in QTimerInfoList::timerWait (this=0x2925db0, tm=...) at kernel/qeventdispatcher_unix.cpp:442
#2  0x00007fd70d10f44c in timerSourcePrepareHelper (src=<optimized out>, timeout=0x7fd6ead0dc1c) at kernel/qeventdispatcher_glib.cpp:136
#3  0x00007fd70d10f4f5 in timerSourcePrepare (source=<optimized out>, timeout=<optimized out>) at kernel/qeventdispatcher_glib.cpp:169
#4  0x00007fd7044a7ff2 in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007fd7044a8dfd in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#6  0x00007fd7044a9429 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#7  0x00007fd70d10ff3e in QEventDispatcherGlib::processEvents (this=0x28edf70, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:424
#8  0x00007fd70d0e3cf2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#9  0x00007fd70d0e3ef7 in QEventLoop::exec (this=0x7fd6ead0ddb0, flags=...) at kernel/qeventloop.cpp:201
#10 0x00007fd70cffb27f in QThread::exec (this=<optimized out>) at thread/qthread.cpp:498
#11 0x00007fd70d0c6cbf in QInotifyFileSystemWatcherEngine::run (this=0x292c880) at io/qfilesystemwatcher_inotify.cpp:248
#12 0x00007fd70cffdd05 in QThreadPrivate::start (arg=0x292c880) at thread/qthread_unix.cpp:331
#13 0x00007fd704fb5efc in start_thread (arg=0x7fd6ead0e700) at pthread_create.c:304
#14 0x00007fd70ff2989d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#15 0x0000000000000000 in ?? ()

Thread 2 (Thread 0x7fd6ea0e1700 (LWP 2094)):
#0  0x00007fd70ff1d773 in __GI___poll (fds=<optimized out>, nfds=<optimized out>, timeout=<optimized out>) at ../sysdeps/unix/sysv/linux/poll.c:87
#1  0x00007fd7044a8f68 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fd7044a9429 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fd70d10ff3e in QEventDispatcherGlib::processEvents (this=0x2917270, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:424
#4  0x00007fd70d0e3cf2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007fd70d0e3ef7 in QEventLoop::exec (this=0x7fd6ea0e0db0, flags=...) at kernel/qeventloop.cpp:201
#6  0x00007fd70cffb27f in QThread::exec (this=<optimized out>) at thread/qthread.cpp:498
#7  0x00007fd70d0c6cbf in QInotifyFileSystemWatcherEngine::run (this=0x2914f40) at io/qfilesystemwatcher_inotify.cpp:248
#8  0x00007fd70cffdd05 in QThreadPrivate::start (arg=0x2914f40) at thread/qthread_unix.cpp:331
#9  0x00007fd704fb5efc in start_thread (arg=0x7fd6ea0e1700) at pthread_create.c:304
#10 0x00007fd70ff2989d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#11 0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7fd71063f7a0 (LWP 2088)):
[KCrash Handler]
#6  0x00007fd70cf4f790 in vtable for QGraphicsLayoutItem () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#7  0x00007fd6f69b0b96 in TaskGroupItem::~TaskGroupItem (this=0x4cb3990, __in_chrg=<optimized out>) at ../../../../../plasma/desktop/applets/tasks/taskgroupitem.cpp:82
#8  0x00007fd6f69b0c49 in TaskGroupItem::~TaskGroupItem (this=0x4cb3990, __in_chrg=<optimized out>) at ../../../../../plasma/desktop/applets/tasks/taskgroupitem.cpp:83
#9  0x00007fd70d0fba88 in QObject::event (this=0x4cb3990, e=<optimized out>) at kernel/qobject.cpp:1200
#10 0x00007fd70cab389b in QGraphicsWidget::event (this=0x4cb3990, event=0x4c95030) at graphicsview/qgraphicswidget.cpp:1455
#11 0x00007fd70c495424 in notify_helper (e=0x4c95030, receiver=0x4cb3990, this=0x1c76d00) at kernel/qapplication.cpp:4486
#12 QApplicationPrivate::notify_helper (this=0x1c76d00, receiver=0x4cb3990, e=0x4c95030) at kernel/qapplication.cpp:4458
#13 0x00007fd70c49a291 in QApplication::notify (this=0x1c64230, receiver=0x4cb3990, e=0x4c95030) at kernel/qapplication.cpp:4365
#14 0x00007fd70dd93126 in KApplication::notify (this=0x1c64230, receiver=0x4cb3990, event=0x4c95030) at ../../kdeui/kernel/kapplication.cpp:311
#15 0x00007fd70d0e4afc in QCoreApplication::notifyInternal (this=0x1c64230, receiver=0x4cb3990, event=0x4c95030) at kernel/qcoreapplication.cpp:787
#16 0x00007fd70d0e851f in sendEvent (event=0x4c95030, receiver=0x4cb3990) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#17 QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=52, data=0x1bfb430) at kernel/qcoreapplication.cpp:1428
#18 0x00007fd70d0e87c4 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1071
#19 0x00007fd7102281a3 in kdemain (argc=1, argv=0x7fffd1f412d8) at ../../../../plasma/desktop/shell/main.cpp:120
#20 0x00007fd70fe6930d in __libc_start_main (main=0x400640 <main(int, char**)>, argc=1, ubp_av=0x7fffd1f412d8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fffd1f412c8) at libc-start.c:226
#21 0x0000000000400671 in _start ()

Possible duplicates by query: bug 288822, bug 288715, bug 288129, bug 287962, bug 287333.

Reported using DrKonqi