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-pae i686
Distribution: Ubuntu 11.10

-- Information about the crash:
- What I was doing when the application crashed:
Switching application using the panel. Happens from time to time in my Kubuntu install.

-- Backtrace:
Application: Plasma Desktop Shell (plasma-desktop), signal: Segmentation fault
[Current thread is 1 (Thread 0xb1f69b20 (LWP 1956))]

Thread 4 (Thread 0xab0d3b70 (LWP 1960)):
#0  0xb77fd0c2 in ?? () from /lib/ld-linux.so.2
#1  0xb76a340e in __GI___poll (fds=0xaa701110, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:87
#2  0xb2f9434b in g_poll () from /lib/i386-linux-gnu/libglib-2.0.so.0
#3  0xb2f85896 in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#4  0xb2f85c2a in g_main_context_iteration () from /lib/i386-linux-gnu/libglib-2.0.so.0
#5  0xb64fdb37 in QEventDispatcherGlib::processEvents (this=0xa1832e8, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#6  0xb64ce1dd in QEventLoop::processEvents (this=0xab0d32a0, flags=...) at kernel/qeventloop.cpp:149
#7  0xb64ce421 in QEventLoop::exec (this=0xab0d32a0, flags=...) at kernel/qeventloop.cpp:201
#8  0xb63d190b in QThread::exec (this=0xa181618) at thread/qthread.cpp:498
#9  0xb64aee2d in QInotifyFileSystemWatcherEngine::run (this=0xa181618) at io/qfilesystemwatcher_inotify.cpp:248
#10 0xb63d47b3 in QThreadPrivate::start (arg=0xa181618) at thread/qthread_unix.cpp:331
#11 0xb309fd31 in start_thread (arg=0xab0d3b70) at pthread_create.c:304
#12 0xb76b20ce in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:130
Backtrace stopped: Not enough registers or memory available to unwind further

Thread 3 (Thread 0xa9604b70 (LWP 1961)):
#0  0xb77fd0c2 in ?? () from /lib/ld-linux.so.2
#1  0xb76a340e in __GI___poll (fds=0xa2babc0, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:87
#2  0xb2f9434b in g_poll () from /lib/i386-linux-gnu/libglib-2.0.so.0
#3  0xb2f85896 in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#4  0xb2f85c2a in g_main_context_iteration () from /lib/i386-linux-gnu/libglib-2.0.so.0
#5  0xb64fdb37 in QEventDispatcherGlib::processEvents (this=0xa1ffc68, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#6  0xb64ce1dd in QEventLoop::processEvents (this=0xa96042a0, flags=...) at kernel/qeventloop.cpp:149
#7  0xb64ce421 in QEventLoop::exec (this=0xa96042a0, flags=...) at kernel/qeventloop.cpp:201
#8  0xb63d190b in QThread::exec (this=0xa201210) at thread/qthread.cpp:498
#9  0xb64aee2d in QInotifyFileSystemWatcherEngine::run (this=0xa201210) at io/qfilesystemwatcher_inotify.cpp:248
#10 0xb63d47b3 in QThreadPrivate::start (arg=0xa201210) at thread/qthread_unix.cpp:331
#11 0xb309fd31 in start_thread (arg=0xa9604b70) at pthread_create.c:304
#12 0xb76b20ce in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:130
Backtrace stopped: Not enough registers or memory available to unwind further

Thread 2 (Thread 0xa6ffab70 (LWP 2017)):
#0  0xb76bfee8 in pthread_mutex_lock (mutex=0xa6db77c) at forward.c:182
#1  0xb2f84b9b in g_main_context_query () from /lib/i386-linux-gnu/libglib-2.0.so.0
#2  0xb2f85664 in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#3  0xb2f85f9b in g_main_loop_run () from /lib/i386-linux-gnu/libglib-2.0.so.0
#4  0xa78dacea in ?? () from /usr/lib/i386-linux-gnu/libgio-2.0.so.0
#5  0xb2fac5f4 in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#6  0xb309fd31 in start_thread (arg=0xa6ffab70) at pthread_create.c:304
#7  0xb76b20ce in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:130
Backtrace stopped: Not enough registers or memory available to unwind further

Thread 1 (Thread 0xb1f69b20 (LWP 1956)):
[KCrash Handler]
#7  isNull (this=0x1) at /usr/include/qt4/QtCore/qsharedpointer_impl.h:568
#8  operator! (this=0x1) at /usr/include/qt4/QtCore/qsharedpointer_impl.h:574
#9  TaskManager::TaskItem::task (this=0xaa18940) at ../../../libs/taskmanager/taskitem.cpp:113
#10 0xb0adc662 in WindowTaskItem::publishIconGeometry (this=0xa4aa608) at ../../../../../plasma/desktop/applets/tasks/windowtaskitem.cpp:120
#11 0xb0aed688 in AbstractTaskItem::timerEvent (this=0xa4aa608, event=0xbf9279cc) at ../../../../../plasma/desktop/applets/tasks/abstracttaskitem.cpp:439
#12 0xb64e7994 in QObject::event (this=0xa4aa608, e=0xbf9279cc) at kernel/qobject.cpp:1181
#13 0xb60b9bd4 in QGraphicsWidget::event (this=0xa4aa608, event=0xbf9279cc) at graphicsview/qgraphicswidget.cpp:1455
#14 0xb59fad54 in notify_helper (e=0xbf9279cc, receiver=0xa4aa608, this=0x9bf73b8) at kernel/qapplication.cpp:4486
#15 QApplicationPrivate::notify_helper (this=0x9bf73b8, receiver=0xa4aa608, e=0xbf9279cc) at kernel/qapplication.cpp:4458
#16 0xb5a00103 in QApplication::notify (this=0xbf9279cc, receiver=0xa4aa608, e=0xbf9279cc) at kernel/qapplication.cpp:3886
#17 0xb6b34681 in KApplication::notify (this=0x9bea990, receiver=0xa4aa608, event=0xbf9279cc) at ../../kdeui/kernel/kapplication.cpp:311
#18 0xb64cf19e in QCoreApplication::notifyInternal (this=0x9bea990, receiver=0xa4aa608, event=0xbf9279cc) at kernel/qcoreapplication.cpp:787
#19 0xb64ffc10 in sendEvent (event=0xbf9279cc, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#20 QTimerInfoList::activateTimers (this=0x9bf98ec) at kernel/qeventdispatcher_unix.cpp:603
#21 0xb64fd155 in timerSourceDispatch (source=<optimized out>) at kernel/qeventdispatcher_glib.cpp:184
#22 idleTimerSourceDispatch (source=0x9bf9920) at kernel/qeventdispatcher_glib.cpp:231
#23 0xb2f8525f in g_main_context_dispatch () from /lib/i386-linux-gnu/libglib-2.0.so.0
#24 0xb2f85990 in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#25 0xb2f85c2a in g_main_context_iteration () from /lib/i386-linux-gnu/libglib-2.0.so.0
#26 0xb64fdada in QEventDispatcherGlib::processEvents (this=0x9bac200, flags=...) at kernel/qeventdispatcher_glib.cpp:422
#27 0xb5ab2e3a in QGuiEventDispatcherGlib::processEvents (this=0x9bac200, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#28 0xb64ce1dd in QEventLoop::processEvents (this=0xbf927c44, flags=...) at kernel/qeventloop.cpp:149
#29 0xb64ce421 in QEventLoop::exec (this=0xbf927c44, flags=...) at kernel/qeventloop.cpp:201
#30 0xb64d319d in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1064
#31 0xb59f88f4 in QApplication::exec () at kernel/qapplication.cpp:3760
#32 0xb77b118b in kdemain (argc=1, argv=0xbf927e44) at ../../../../plasma/desktop/shell/main.cpp:120
#33 0x0804850b in main (argc=1, argv=0xbf927e44) at plasma-desktop_dummy.cpp:3

Possible duplicates by query: bug 289985, bug 289957, bug 289952, bug 289940, bug 289873.

Reported using DrKonqi