Application: plasma-desktop (0.4)
KDE Platform Version: 4.7.3 (4.7.3)
Qt Version: 4.7.4
Operating System: Linux 3.0.0-13-generic x86_64
Distribution: Ubuntu 11.10

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

I've set my desktop to activate windows without pressing the mouse button.
It usually happen that when I move the mouse to the bar to select a different application plasma crashes. No click is needed, just passing the mouse on the task manager

-- Backtrace:
Application: Plasma Desktop Shell (plasma-desktop), signal: Segmentation fault
[Current thread is 1 (Thread 0x7f2b7c8267a0 (LWP 3598))]

Thread 4 (Thread 0x7f2b5a275700 (LWP 3600)):
#0  0x00007f2b7c10a773 in __GI___poll (fds=<optimized out>, nfds=<optimized out>, timeout=<optimized out>) at ../sysdeps/unix/sysv/linux/poll.c:87
#1  0x00007f2b70694f68 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f2b70695429 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f2b792fbf3e in QEventDispatcherGlib::processEvents (this=0x204ca00, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:424
#4  0x00007f2b792cfcf2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007f2b792cfef7 in QEventLoop::exec (this=0x7f2b5a274db0, flags=...) at kernel/qeventloop.cpp:201
#6  0x00007f2b791e727f in QThread::exec (this=<optimized out>) at thread/qthread.cpp:498
#7  0x00007f2b792b2cbf in QInotifyFileSystemWatcherEngine::run (this=0x204c380) at io/qfilesystemwatcher_inotify.cpp:248
#8  0x00007f2b791e9d05 in QThreadPrivate::start (arg=0x204c380) at thread/qthread_unix.cpp:331
#9  0x00007f2b711a1efc in start_thread (arg=0x7f2b5a275700) at pthread_create.c:304
#10 0x00007f2b7c11689d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#11 0x0000000000000000 in ?? ()

Thread 3 (Thread 0x7f2b51dbe700 (LWP 3602)):
#0  0x00007f2b7c10a773 in __GI___poll (fds=<optimized out>, nfds=<optimized out>, timeout=<optimized out>) at ../sysdeps/unix/sysv/linux/poll.c:87
#1  0x00007f2b70694f68 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f2b70695429 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f2b792fbf3e in QEventDispatcherGlib::processEvents (this=0x2586430, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:424
#4  0x00007f2b792cfcf2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007f2b792cfef7 in QEventLoop::exec (this=0x7f2b51dbddb0, flags=...) at kernel/qeventloop.cpp:201
#6  0x00007f2b791e727f in QThread::exec (this=<optimized out>) at thread/qthread.cpp:498
#7  0x00007f2b792b2cbf in QInotifyFileSystemWatcherEngine::run (this=0x2585670) at io/qfilesystemwatcher_inotify.cpp:248
#8  0x00007f2b791e9d05 in QThreadPrivate::start (arg=0x2585670) at thread/qthread_unix.cpp:331
#9  0x00007f2b711a1efc in start_thread (arg=0x7f2b51dbe700) at pthread_create.c:304
#10 0x00007f2b7c11689d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#11 0x0000000000000000 in ?? ()

Thread 2 (Thread 0x7f2b4f1cb700 (LWP 3609)):
#0  0x00007f2b7c10a773 in __GI___poll (fds=<optimized out>, nfds=<optimized out>, timeout=<optimized out>) at ../sysdeps/unix/sysv/linux/poll.c:87
#1  0x00007f2b70694f68 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f2b70695792 in g_main_loop_run () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f2b4fca9516 in ?? () from /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
#4  0x00007f2b706ba2b6 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f2b711a1efc in start_thread (arg=0x7f2b4f1cb700) at pthread_create.c:304
#6  0x00007f2b7c11689d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#7  0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7f2b7c8267a0 (LWP 3598)):
[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=0x3929b80) at ../../../libs/taskmanager/taskitem.cpp:113
#9  0x00007f2b63014112 in WindowTaskItem::publishIconGeometry (this=0x32aa730) at ../../../../../plasma/desktop/applets/tasks/windowtaskitem.cpp:120
#10 0x00007f2b63022b7c in AbstractTaskItem::timerEvent (this=0x32aa730, event=<optimized out>) at ../../../../../plasma/desktop/applets/tasks/abstracttaskitem.cpp:439
#11 0x00007f2b792e7789 in QObject::event (this=0x32aa730, e=<optimized out>) at kernel/qobject.cpp:1181
#12 0x00007f2b78c9f89b in QGraphicsWidget::event (this=0x32aa730, event=0x7fff91f59a60) at graphicsview/qgraphicswidget.cpp:1455
#13 0x00007f2b78681424 in notify_helper (e=0x7fff91f59a60, receiver=0x32aa730, this=0x16cb680) at kernel/qapplication.cpp:4486
#14 QApplicationPrivate::notify_helper (this=0x16cb680, receiver=0x32aa730, e=0x7fff91f59a60) at kernel/qapplication.cpp:4458
#15 0x00007f2b78686291 in QApplication::notify (this=0x16bbe00, receiver=0x32aa730, e=0x7fff91f59a60) at kernel/qapplication.cpp:4365
#16 0x00007f2b79f7f126 in KApplication::notify (this=0x16bbe00, receiver=0x32aa730, event=0x7fff91f59a60) at ../../kdeui/kernel/kapplication.cpp:311
#17 0x00007f2b792d0afc in QCoreApplication::notifyInternal (this=0x16bbe00, receiver=0x32aa730, event=0x7fff91f59a60) at kernel/qcoreapplication.cpp:787
#18 0x00007f2b792fdd62 in sendEvent (event=0x7fff91f59a60, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#19 QTimerInfoList::activateTimers (this=0x16ca700) at kernel/qeventdispatcher_unix.cpp:603
#20 0x00007f2b792fb538 in timerSourceDispatch (source=<optimized out>) at kernel/qeventdispatcher_glib.cpp:184
#21 idleTimerSourceDispatch (source=<optimized out>) at kernel/qeventdispatcher_glib.cpp:231
#22 0x00007f2b70694a5d in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#23 0x00007f2b70695258 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#24 0x00007f2b70695429 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#25 0x00007f2b792fbed6 in QEventDispatcherGlib::processEvents (this=0x1655f40, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:422
#26 0x00007f2b7872907e in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=<optimized out>) at kernel/qguieventdispatcher_glib.cpp:204
#27 0x00007f2b792cfcf2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#28 0x00007f2b792cfef7 in QEventLoop::exec (this=0x7fff91f59cf0, flags=...) at kernel/qeventloop.cpp:201
#29 0x00007f2b792d4789 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1064
#30 0x00007f2b7c4151a3 in kdemain (argc=1, argv=0x7fff91f5a0d8) at ../../../../plasma/desktop/shell/main.cpp:120
#31 0x00007f2b7c05630d in __libc_start_main (main=0x400640 <main(int, char**)>, argc=1, ubp_av=0x7fff91f5a0d8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fff91f5a0c8) at libc-start.c:226
#32 0x0000000000400671 in _start ()

Possible duplicates by query: bug 287489, bug 287460, bug 287277, bug 287181, bug 287120.

Reported using DrKonqi