Application: plasma-desktop (0.4)
KDE Platform Version: 4.7.3 (4.7.3)
Qt Version: 4.7.4
Operating System: Linux 3.0.0-14-generic x86_64
Distribution: Ubuntu 11.10

-- Information about the crash:
- What I was doing when the application crashed:
Running a new application (Launching it or open it)
The applcation was MuseScore but it happen also with digikam

The crash can be reproduced every time.

-- Backtrace:
Application: Outil de gestion de fenêtres Plasma (plasma-desktop), signal: Segmentation fault
[Current thread is 1 (Thread 0x7f582f1cd7a0 (LWP 1810))]

Thread 4 (Thread 0x7f5805849700 (LWP 1815)):
#0  pthread_mutex_lock (mutex=0x3ec4288) at forward.c:182
#1  0x00007f582303f044 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f582303f429 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f582bca5f3e in QEventDispatcherGlib::processEvents (this=0x3ec3c70, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:424
#4  0x00007f582bc79cf2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007f582bc79ef7 in QEventLoop::exec (this=0x7f5805848db0, flags=...) at kernel/qeventloop.cpp:201
#6  0x00007f582bb9127f in QThread::exec (this=<optimized out>) at thread/qthread.cpp:498
#7  0x00007f582bc5ccbf in QInotifyFileSystemWatcherEngine::run (this=0x3ec3040) at io/qfilesystemwatcher_inotify.cpp:248
#8  0x00007f582bb93d05 in QThreadPrivate::start (arg=0x3ec3040) at thread/qthread_unix.cpp:331
#9  0x00007f5823b4befc in start_thread (arg=0x7f5805849700) at pthread_create.c:304
#10 0x00007f582eac089d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#11 0x0000000000000000 in ?? ()

Thread 3 (Thread 0x7f57f7fff700 (LWP 1821)):
#0  0x00007f582303d60b in g_main_context_acquire () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f582303ed81 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f582303f429 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f582bca5f3e in QEventDispatcherGlib::processEvents (this=0x2f50970, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:424
#4  0x00007f582bc79cf2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007f582bc79ef7 in QEventLoop::exec (this=0x7f57f7ffedb0, flags=...) at kernel/qeventloop.cpp:201
#6  0x00007f582bb9127f in QThread::exec (this=<optimized out>) at thread/qthread.cpp:498
#7  0x00007f582bc5ccbf in QInotifyFileSystemWatcherEngine::run (this=0x4ed3ad0) at io/qfilesystemwatcher_inotify.cpp:248
#8  0x00007f582bb93d05 in QThreadPrivate::start (arg=0x4ed3ad0) at thread/qthread_unix.cpp:331
#9  0x00007f5823b4befc in start_thread (arg=0x7f57f7fff700) at pthread_create.c:304
#10 0x00007f582eac089d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#11 0x0000000000000000 in ?? ()

Thread 2 (Thread 0x7f57eec37700 (LWP 1826)):
#0  0x00007f582eab4773 in __GI___poll (fds=<optimized out>, nfds=<optimized out>, timeout=<optimized out>) at ../sysdeps/unix/sysv/linux/poll.c:87
#1  0x00007f582303ef68 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f582303f792 in g_main_loop_run () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f57ef715516 in ?? () from /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
#4  0x00007f58230642b6 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f5823b4befc in start_thread (arg=0x7f57eec37700) at pthread_create.c:304
#6  0x00007f582eac089d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#7  0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7f582f1cd7a0 (LWP 1810)):
[KCrash Handler]
#6  isNull (this=0x4d0000) at /usr/include/qt4/QtCore/qsharedpointer_impl.h:568
#7  operator! (this=0x4d0000) at /usr/include/qt4/QtCore/qsharedpointer_impl.h:574
#8  TaskManager::TaskItem::task (this=0x58cc4a0) at ../../../libs/taskmanager/taskitem.cpp:113
#9  0x00007f5812907068 in WindowTaskItem::publishIconGeometry (this=0x6348080, rect=...) at ../../../../../plasma/desktop/applets/tasks/windowtaskitem.cpp:130
#10 0x00007f5812916d24 in TaskGroupItem::publishIconGeometry (this=<optimized out>, rect=...) at ../../../../../plasma/desktop/applets/tasks/taskgroupitem.cpp:1432
#11 0x00007f5812916aa5 in publishIconGeometry (this=0x6347630) at ../../../../../plasma/desktop/applets/tasks/taskgroupitem.cpp:1424
#12 TaskGroupItem::publishIconGeometry (this=<optimized out>) at ../../../../../plasma/desktop/applets/tasks/taskgroupitem.cpp:1416
#13 0x00007f5812915b7c in AbstractTaskItem::timerEvent (this=0x6347630, event=<optimized out>) at ../../../../../plasma/desktop/applets/tasks/abstracttaskitem.cpp:439
#14 0x00007f582bc91789 in QObject::event (this=0x6347630, e=<optimized out>) at kernel/qobject.cpp:1181
#15 0x00007f582b64989b in QGraphicsWidget::event (this=0x6347630, event=0x7fff72f6be10) at graphicsview/qgraphicswidget.cpp:1455
#16 0x00007f582b02b424 in notify_helper (e=0x7fff72f6be10, receiver=0x6347630, this=0x25b69a0) at kernel/qapplication.cpp:4486
#17 QApplicationPrivate::notify_helper (this=0x25b69a0, receiver=0x6347630, e=0x7fff72f6be10) at kernel/qapplication.cpp:4458
#18 0x00007f582b030291 in QApplication::notify (this=0x2598ef0, receiver=0x6347630, e=0x7fff72f6be10) at kernel/qapplication.cpp:4365
#19 0x00007f582c929126 in KApplication::notify (this=0x2598ef0, receiver=0x6347630, event=0x7fff72f6be10) at ../../kdeui/kernel/kapplication.cpp:311
#20 0x00007f582bc7aafc in QCoreApplication::notifyInternal (this=0x2598ef0, receiver=0x6347630, event=0x7fff72f6be10) at kernel/qcoreapplication.cpp:787
#21 0x00007f582bca7d62 in sendEvent (event=0x7fff72f6be10, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#22 QTimerInfoList::activateTimers (this=0x25ba480) at kernel/qeventdispatcher_unix.cpp:603
#23 0x00007f582bca5538 in timerSourceDispatch (source=<optimized out>) at kernel/qeventdispatcher_glib.cpp:184
#24 idleTimerSourceDispatch (source=<optimized out>) at kernel/qeventdispatcher_glib.cpp:231
#25 0x00007f582303ea5d in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#26 0x00007f582303f258 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#27 0x00007f582303f429 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#28 0x00007f582bca5ed6 in QEventDispatcherGlib::processEvents (this=0x2534f40, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:422
#29 0x00007f582b0d307e in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=<optimized out>) at kernel/qguieventdispatcher_glib.cpp:204
#30 0x00007f582bc79cf2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#31 0x00007f582bc79ef7 in QEventLoop::exec (this=0x7fff72f6c0a0, flags=...) at kernel/qeventloop.cpp:201
#32 0x00007f582bc7e789 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1064
#33 0x00007f582edbf1a3 in kdemain (argc=1, argv=0x7fff72f6c488) at ../../../../plasma/desktop/shell/main.cpp:120
#34 0x00007f582ea0030d in __libc_start_main (main=0x400640 <main(int, char**)>, argc=1, ubp_av=0x7fff72f6c488, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fff72f6c478) at libc-start.c:226
#35 0x0000000000400671 in _start ()

This bug may be a duplicate of or related to bug 272495.

Possible duplicates by query: bug 290106, bug 290101, bug 290081, bug 290071, bug 290032.

Reported using DrKonqi