Application that crashed: plasma-desktop
Version of the application: 0.3
KDE Version: 4.3.2 (KDE 4.3.2)
Qt Version: 4.5.2
Operating System: Linux 2.6.31-16-generic x86_64
Distribution: Ubuntu 9.10

What I was doing when the application crashed:
Crashes happen irregularly every couple of desktop switches. Plasma restarts most of the time but not always.

 -- Backtrace:
Application: Plasma-Arbeitsfläche (plasma-desktop), signal: Segmentation fault
The current source language is "auto; currently c".
[Current thread is 1 (Thread 0x7f3f8238e770 (LWP 17925))]

Thread 2 (Thread 0x7f3f62160910 (LWP 17926)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:261
#1  0x00007f3f7ee5f4fb in QWaitConditionPrivate::wait (this=<value optimized out>, mutex=0x1462a28, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:87
#2  QWaitCondition::wait (this=<value optimized out>, mutex=0x1462a28, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:159
#3  0x00007f3f7bbad78c in QHostInfoAgent::run (this=0x1462a10) at kernel/qhostinfo.cpp:260
#4  0x00007f3f7ee5e445 in QThreadPrivate::start (arg=0x1462a10) at thread/qthread_unix.cpp:188
#5  0x00007f3f79491a04 in start_thread (arg=<value optimized out>) at pthread_create.c:300
#6  0x00007f3f81c987bd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#7  0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7f3f8238e770 (LWP 17925)):
[KCrash Handler]
#5  QGraphicsLayoutItem::geometry (this=0xec3cd0) at graphicsview/qgraphicslayoutitem.cpp:664
#6  0x00007f3f7fc1a125 in QGraphicsWidget::size (this=<value optimized out>) at graphicsview/qgraphicswidget.cpp:336
#7  0x00007f3f65904f08 in AbstractTaskItem::basicPreferredSize (this=0x18e9ef0) at ../../../../plasma/applets/tasks/abstracttaskitem.cpp:108
#8  0x00007f3f65901255 in TaskItemLayout::preferredColumns (this=0x1186840) at ../../../../plasma/applets/tasks/taskitemlayout.cpp:206
#9  0x00007f3f65901f3d in TaskItemLayout::gridLayoutSize (this=0x1186840) at ../../../../plasma/applets/tasks/taskitemlayout.cpp:222
#10 0x00007f3f65901fcb in TaskItemLayout::layoutItems (this=0x7fff33126010) at ../../../../plasma/applets/tasks/taskitemlayout.cpp:245
#11 0x00007f3f65902a4f in TaskItemLayout::insert (this=0x1186840, index=<value optimized out>, item=0x15e1630) at ../../../../plasma/applets/tasks/taskitemlayout.cpp:125
#12 0x00007f3f65902c20 in TaskItemLayout::addTaskItem (this=0x1186840, item=0x15e1630) at ../../../../plasma/applets/tasks/taskitemlayout.cpp:82
#13 0x00007f3f6590e948 in TaskGroupItem::itemAdded (this=0x11dd2e0, groupableItem=0x1189d30) at ../../../../plasma/applets/tasks/taskgroupitem.cpp:477
#14 0x00007f3f6590efc4 in TaskGroupItem::qt_metacall (this=0x11dd2e0, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x7fff33126680) at ./taskgroupitem.moc:113
#15 0x00007f3f7ef59ddc in QMetaObject::activate (sender=0x11dcd00, from_signal_index=<value optimized out>, to_signal_index=<value optimized out>, argv=0x1200000000) at kernel/qobject.cpp:3113
#16 0x00007f3f656d3d6f in TaskManager::TaskGroup::itemAdded (this=0x7fff33126010, _t1=0x1189d30) at ./taskgroup.moc:145
#17 0x00007f3f656d465f in TaskManager::TaskGroup::add (this=0x11dcd00, item=0x1189d30) at ../../../libs/taskmanager/taskgroup.cpp:138
#18 0x00007f3f656bdfd4 in TaskManager::GroupManagerPrivate::addTask (this=0x122d4e0, task=) at ../../../libs/taskmanager/groupmanager.cpp:290
#19 0x00007f3f656be8bb in TaskManager::GroupManagerPrivate::actuallyReloadTasks (this=0x122d4e0) at ../../../libs/taskmanager/groupmanager.cpp:155
#20 0x00007f3f656c0139 in TaskManager::GroupManager::qt_metacall (this=0xe2da60, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x7fff33126900) at ./groupmanager.moc:108
#21 0x00007f3f7ef59ddc in QMetaObject::activate (sender=0x122d548, from_signal_index=<value optimized out>, to_signal_index=<value optimized out>, argv=0x1200000000) at kernel/qobject.cpp:3113
#22 0x00007f3f7ef53d83 in QObject::event (this=0x122d548, e=0xec3cd0) at kernel/qobject.cpp:1075
#23 0x00007f3f7f648efc in QApplicationPrivate::notify_helper (this=0x9db280, receiver=0x122d548, e=0x7fff33126f00) at kernel/qapplication.cpp:4056
#24 0x00007f3f7f6501ce in QApplication::notify (this=0x9c7c30, receiver=0x122d548, e=0x7fff33126f00) at kernel/qapplication.cpp:4021
#25 0x00007f3f8070cab6 in KApplication::notify (this=0x9c7c30, receiver=0x122d548, event=0x7fff33126f00) at ../../kdeui/kernel/kapplication.cpp:302
#26 0x00007f3f7ef44c2c in QCoreApplication::notifyInternal (this=0x9c7c30, receiver=0x122d548, event=0x7fff33126f00) at kernel/qcoreapplication.cpp:610
#27 0x00007f3f7ef6f862 in QCoreApplication::sendEvent (this=0x9de7e0) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:213
#28 QTimerInfoList::activateTimers (this=0x9de7e0) at kernel/qeventdispatcher_unix.cpp:572
#29 0x00007f3f7ef6d25d in timerSourceDispatch (source=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:165
#30 0x00007f3f796e2bbe in g_main_dispatch (context=0x9dd920) at /build/buildd/glib2.0-2.22.2/glib/gmain.c:1960
#31 IA__g_main_context_dispatch (context=0x9dd920) at /build/buildd/glib2.0-2.22.2/glib/gmain.c:2513
#32 0x00007f3f796e6588 in g_main_context_iterate (context=0x9dd920, block=<value optimized out>, dispatch=<value optimized out>, self=<value optimized out>)
    at /build/buildd/glib2.0-2.22.2/glib/gmain.c:2591
#33 0x00007f3f796e66b0 in IA__g_main_context_iteration (context=0x9dd920, may_block=1) at /build/buildd/glib2.0-2.22.2/glib/gmain.c:2654
#34 0x00007f3f7ef6d1a6 in QEventDispatcherGlib::processEvents (this=0x9aee90, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:327
#35 0x00007f3f7f6dd4be in QGuiEventDispatcherGlib::processEvents (this=0x7fff33126010, flags=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:202
#36 0x00007f3f7ef43532 in QEventLoop::processEvents (this=<value optimized out>, flags=) at kernel/qeventloop.cpp:149
#37 0x00007f3f7ef43904 in QEventLoop::exec (this=0x7fff331271a0, flags=) at kernel/qeventloop.cpp:201
#38 0x00007f3f7ef45ab9 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:888
#39 0x00007f3f81f654cf in kdemain (argc=<value optimized out>, argv=<value optimized out>) at ../../../../plasma/shells/desktop/main.cpp:50
#40 0x00007f3f81bd7abd in __libc_start_main (main=<value optimized out>, argc=<value optimized out>, ubp_av=<value optimized out>, init=<value optimized out>, fini=<value optimized out>, 
    rtld_fini=<value optimized out>, stack_end=0x7fff331274a8) at libc-start.c:220
#41 0x0000000000400689 in _start () at ../sysdeps/x86_64/elf/start.S:113
The current source language is "auto; currently asm".
The current source language is "auto; currently c".

This bug may be a duplicate of or related to bug 219151

Reported using DrKonqi