Application: plasma-desktop (0.4)
KDE Platform Version: 4.10.00
Qt Version: 4.8.3
Operating System: Linux 3.5.0-23-generic x86_64
Distribution: Ubuntu 12.10

-- Information about the crash:
- What I was doing when the application crashed:
Try to create a new activity

- Unusual behavior I noticed:
Applications can not set to activitys, alwasy on all activitys

The crash can be reproduced some of the time.

-- Backtrace:
Application: Plasma-Desktop-Umgebung (plasma-desktop), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f7ed2b0b780 (LWP 2342))]

Thread 5 (Thread 0x7f7ec4a15700 (LWP 2346)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007f7edfb8acd7 in ?? () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
#2  0x00007f7edfb8ad09 in ?? () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
#3  0x00007f7eda238e9a in start_thread (arg=0x7f7ec4a15700) at pthread_create.c:308
#4  0x00007f7ee5f46cbd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#5  0x0000000000000000 in ?? ()

Thread 4 (Thread 0x7f7eb9adc700 (LWP 2407)):
#0  0x00007f7ed9b0b930 in pthread_mutex_unlock@plt () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f7ed9b76e51 in g_mutex_unlock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f7ed9b39d79 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f7ed9b39ea4 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f7ee2b33c16 in QEventDispatcherGlib::processEvents (this=0x7f7eac0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#5  0x00007f7ee2b042bf in QEventLoop::processEvents (this=this@entry=0x7f7eb9adbdd0, flags=...) at kernel/qeventloop.cpp:149
#6  0x00007f7ee2b04548 in QEventLoop::exec (this=0x7f7eb9adbdd0, flags=...) at kernel/qeventloop.cpp:204
#7  0x00007f7ee2a05b10 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:501
#8  0x00007f7ee2ae49af in QInotifyFileSystemWatcherEngine::run (this=0x248c350) at io/qfilesystemwatcher_inotify.cpp:248
#9  0x00007f7ee2a08aec in QThreadPrivate::start (arg=0x248c350) at thread/qthread_unix.cpp:338
#10 0x00007f7eda238e9a in start_thread (arg=0x7f7eb9adc700) at pthread_create.c:308
#11 0x00007f7ee5f46cbd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#12 0x0000000000000000 in ?? ()

Thread 3 (Thread 0x7f7eb8c46700 (LWP 2408)):
#0  0x00007f7ee5f3b303 in __GI___poll (fds=<optimized out>, nfds=<optimized out>, timeout=<optimized out>) at ../sysdeps/unix/sysv/linux/poll.c:87
#1  0x00007f7ed9b39d84 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f7ed9b39ea4 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f7ee2b33c16 in QEventDispatcherGlib::processEvents (this=0x7f7eb00008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#4  0x00007f7ee2b042bf in QEventLoop::processEvents (this=this@entry=0x7f7eb8c45dd0, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007f7ee2b04548 in QEventLoop::exec (this=0x7f7eb8c45dd0, flags=...) at kernel/qeventloop.cpp:204
#6  0x00007f7ee2a05b10 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:501
#7  0x00007f7ee2ae49af in QInotifyFileSystemWatcherEngine::run (this=0x24f9280) at io/qfilesystemwatcher_inotify.cpp:248
#8  0x00007f7ee2a08aec in QThreadPrivate::start (arg=0x24f9280) at thread/qthread_unix.cpp:338
#9  0x00007f7eda238e9a in start_thread (arg=0x7f7eb8c46700) at pthread_create.c:308
#10 0x00007f7ee5f46cbd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#11 0x0000000000000000 in ?? ()

Thread 2 (Thread 0x7f7e9e3f3700 (LWP 2896)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007f7e9fe3666f in ?? () from /usr/lib/libvlccore.so.5
#2  0x00007f7eda238e9a in start_thread (arg=0x7f7e9e3f3700) at pthread_create.c:308
#3  0x00007f7ee5f46cbd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#4  0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7f7ed2b0b780 (LWP 2342)):
[KCrash Handler]
#6  0x00007f7ee2970d30 in vtable for QGraphicsWidget () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#7  0x00007f7ee2b1d6e1 in QObject::disconnect (sender=0x613d230, signal=0x0, receiver=0xede800, method=0x0) at kernel/qobject.cpp:2891
#8  0x00007f7ee6268555 in PlasmaApp::prepareContainment (this=0xede800, containment=0x613d230) at ../../../../plasma/desktop/shell/plasmaapp.cpp:1127
#9  0x00007f7ee6248c85 in DesktopView::setContainment (this=0x5f7d640, containment=0x613d230) at ../../../../plasma/desktop/shell/desktopview.cpp:285
#10 0x00007f7ee5b0c6bc in privateInit (this=0x6d75560) at ../../plasma/view.cpp:71
#11 qt_static_metacall (_a=<optimized out>, _id=<optimized out>, _o=<optimized out>, _c=<optimized out>) at ./view.moc:70
#12 Plasma::View::qt_static_metacall (_o=<optimized out>, _c=<optimized out>, _id=<optimized out>, _a=<optimized out>) at ./view.moc:57
#13 0x00007f7ee2b1a43e in QObject::event (this=0x5f7d640, e=<optimized out>) at kernel/qobject.cpp:1195
#14 0x00007f7ee1efc0da in QWidget::event (this=0x5f7d640, event=0x718c900) at kernel/qwidget.cpp:8830
#15 0x00007f7ee22abb66 in QFrame::event (this=0x5f7d640, e=0x718c900) at widgets/qframe.cpp:557
#16 0x00007f7ee232b82b in QAbstractScrollArea::event (this=0x5f7d640, e=0x718c900) at widgets/qabstractscrollarea.cpp:996
#17 0x00007f7ee1eace9c in QApplicationPrivate::notify_helper (this=this@entry=0xef6120, receiver=receiver@entry=0x5f7d640, e=e@entry=0x718c900) at kernel/qapplication.cpp:4562
#18 0x00007f7ee1eb130a in QApplication::notify (this=0xede800, receiver=0x5f7d640, e=0x718c900) at kernel/qapplication.cpp:4423
#19 0x00007f7ee37be636 in KApplication::notify (this=0xede800, receiver=0x5f7d640, event=0x718c900) at ../../kdeui/kernel/kapplication.cpp:311
#20 0x00007f7ee2b0556e in QCoreApplication::notifyInternal (this=0xede800, receiver=receiver@entry=0x5f7d640, event=event@entry=0x718c900) at kernel/qcoreapplication.cpp:915
#21 0x00007f7ee2b093f1 in sendEvent (event=0x718c900, receiver=0x5f7d640) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:231
#22 QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=0, data=0xe501f0) at kernel/qcoreapplication.cpp:1539
#23 0x00007f7ee2b33a63 in sendPostedEvents () at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:236
#24 postEventSourceDispatch (s=0xeece70) at kernel/qeventdispatcher_glib.cpp:279
#25 0x00007f7ed9b39ab5 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#26 0x00007f7ed9b39de8 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#27 0x00007f7ed9b39ea4 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#28 0x00007f7ee2b33bf6 in QEventDispatcherGlib::processEvents (this=0xe51ad0, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#29 0x00007f7ee1f51c1e in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#30 0x00007f7ee2b042bf in QEventLoop::processEvents (this=this@entry=0x7fff85279c60, flags=...) at kernel/qeventloop.cpp:149
#31 0x00007f7ee2b04548 in QEventLoop::exec (this=0x7fff85279c60, flags=...) at kernel/qeventloop.cpp:204
#32 0x00007f7ee2b09708 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1187
#33 0x00007f7ee624f1b1 in kdemain (argc=1, argv=0x7fff85279f58) at ../../../../plasma/desktop/shell/main.cpp:126
#34 0x00007f7ee5e7476d in __libc_start_main (main=0x4006a0 <main(int, char**)>, argc=1, ubp_av=0x7fff85279f58, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fff85279f48) at libc-start.c:226
#35 0x00000000004006d1 in _start ()

Reported using DrKonqi