Application: plasma-desktop (0.4)
KDE Platform Version: 4.7.3 (4.7.3)
Qt Version: 4.7.4
Operating System: Linux 3.0.0-15-generic x86_64
Distribution: Ubuntu 11.10

-- Information about the crash:
- What I was doing when the application crashed: i was closing firefox. nothing else. kaffeine with dvb tv was still running. i had those two apps open.

The crash can be reproduced some of the time.

-- Backtrace:
Application: Shell del desktop di Plasma (plasma-desktop), signal: Segmentation fault
[Current thread is 1 (Thread 0x7fd6e7b1a7c0 (LWP 3267))]

Thread 3 (Thread 0x7fd6bf31e700 (LWP 3268)):
#0  0x00007fd6dc4951fd in __pthread_mutex_unlock_usercnt (mutex=<optimized out>, decr=<optimized out>) at pthread_mutex_unlock.c:52
#1  __pthread_mutex_unlock (mutex=0x28b4f68) at pthread_mutex_unlock.c:290
#2  0x00007fd6db984d79 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fd6db985429 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fd6e45ebf3e in QEventDispatcherGlib::processEvents (this=0x28b4ac0, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:424
#5  0x00007fd6e45bfcf2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#6  0x00007fd6e45bfef7 in QEventLoop::exec (this=0x7fd6bf31dcd0, flags=...) at kernel/qeventloop.cpp:201
#7  0x00007fd6e44d727f in QThread::exec (this=<optimized out>) at thread/qthread.cpp:498
#8  0x00007fd6e45a2cbf in QInotifyFileSystemWatcherEngine::run (this=0x28b3b10) at io/qfilesystemwatcher_inotify.cpp:248
#9  0x00007fd6e44d9d05 in QThreadPrivate::start (arg=0x28b3b10) at thread/qthread_unix.cpp:331
#10 0x00007fd6d8c9e56c in ?? () from /usr/lib/nvidia-current/libGL.so.1
#11 0x00007fd6dc491efc in start_thread (arg=0x7fd6bf31e700) at pthread_create.c:304
#12 0x00007fd6e740689d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#13 0x0000000000000000 in ?? ()

Thread 2 (Thread 0x7fd6b30a4700 (LWP 4382)):
#0  0xffffffffff60017b in ?? ()
#1  0x00007fd6b30a39f0 in ?? ()
#2  0x00007fff583267e7 in ?? ()
Backtrace stopped: previous frame identical to this frame (corrupt stack?)

Thread 1 (Thread 0x7fd6e7b1a7c0 (LWP 3267)):
[KCrash Handler]
#6  isNull (this=0x0) at /usr/include/qt4/QtCore/qsharedpointer_impl.h:568
#7  operator! (this=0x0) at /usr/include/qt4/QtCore/qsharedpointer_impl.h:574
#8  TaskManager::TaskItem::task (this=0x1c78a60) at ../../../libs/taskmanager/taskitem.cpp:113
#9  0x00007fd6c8654112 in WindowTaskItem::publishIconGeometry (this=0x4e88240) at ../../../../../plasma/desktop/applets/tasks/windowtaskitem.cpp:120
#10 0x00007fd6c8662b7c in AbstractTaskItem::timerEvent (this=0x4e88240, event=<optimized out>) at ../../../../../plasma/desktop/applets/tasks/abstracttaskitem.cpp:439
#11 0x00007fd6e45d7789 in QObject::event (this=0x4e88240, e=<optimized out>) at kernel/qobject.cpp:1181
#12 0x00007fd6e3f8f89b in QGraphicsWidget::event (this=0x4e88240, event=0x7fff5822d910) at graphicsview/qgraphicswidget.cpp:1455
#13 0x00007fd6e3971424 in notify_helper (e=0x7fff5822d910, receiver=0x4e88240, this=0x16bb2f0) at kernel/qapplication.cpp:4486
#14 QApplicationPrivate::notify_helper (this=0x16bb2f0, receiver=0x4e88240, e=0x7fff5822d910) at kernel/qapplication.cpp:4458
#15 0x00007fd6e3976291 in QApplication::notify (this=0x1664f70, receiver=0x4e88240, e=0x7fff5822d910) at kernel/qapplication.cpp:4365
#16 0x00007fd6e526f126 in KApplication::notify (this=0x1664f70, receiver=0x4e88240, event=0x7fff5822d910) at ../../kdeui/kernel/kapplication.cpp:311
#17 0x00007fd6e45c0afc in QCoreApplication::notifyInternal (this=0x1664f70, receiver=0x4e88240, event=0x7fff5822d910) at kernel/qcoreapplication.cpp:787
#18 0x00007fd6e45edd62 in sendEvent (event=0x7fff5822d910, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#19 QTimerInfoList::activateTimers (this=0x16bee00) at kernel/qeventdispatcher_unix.cpp:603
#20 0x00007fd6e45eb538 in timerSourceDispatch (source=<optimized out>) at kernel/qeventdispatcher_glib.cpp:184
#21 idleTimerSourceDispatch (source=<optimized out>) at kernel/qeventdispatcher_glib.cpp:231
#22 0x00007fd6db984a5d in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#23 0x00007fd6db985258 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#24 0x00007fd6db985429 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#25 0x00007fd6e45ebed6 in QEventDispatcherGlib::processEvents (this=0x15f2f40, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:422
#26 0x00007fd6e3a1907e in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=<optimized out>) at kernel/qguieventdispatcher_glib.cpp:204
#27 0x00007fd6e45bfcf2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#28 0x00007fd6e45bfef7 in QEventLoop::exec (this=0x7fff5822dba0, flags=...) at kernel/qeventloop.cpp:201
#29 0x00007fd6e45c4789 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1064
#30 0x00007fd6e77051a3 in kdemain (argc=1, argv=0x7fff5822df88) at ../../../../plasma/desktop/shell/main.cpp:120
#31 0x00007fd6e734630d in __libc_start_main (main=0x400640 <main(int, char**)>, argc=1, ubp_av=0x7fff5822df88, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fff5822df78) at libc-start.c:226
#32 0x0000000000400671 in _start ()

Possible duplicates by query: bug 289683, bug 289676, bug 289669, bug 289660, bug 289653.

Reported using DrKonqi