Application that crashed: plasma-desktop
Version of the application: 0.3
KDE Version: 4.3.4 (KDE 4.3.4)
Qt Version: 4.5.3
Operating System: Linux 2.6.30.10-105.fc11.i586 i686

What I was doing when the application crashed:
I was closing lots of things before shutting down.  The programs in the task manager for that desktop were half-height; the leftmost one was at the bottom of the task manager (with nothing above it), and all the others were at the top.

Earlier, I'd been running things on another computer on that desktop using ssh with X forwarding, but I'd closed all those windows and shut down the other computer.

 -- Backtrace:
Application: Plasma Workspace (plasma-desktop), signal: Segmentation fault
[Current thread is 1 (Thread 0xb76ed7a0 (LWP 1925))]

Thread 2 (Thread 0x8bfbb70 (LWP 1926)):
#0  0x00ccb422 in __kernel_vsyscall ()
#1  0x00d44f85 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
#2  0x00958307 in QWaitConditionPrivate::wait (time=<value optimized out>, this=<value optimized out>) at thread/qwaitcondition_unix.cpp:87
#3  QWaitCondition::wait (time=<value optimized out>, this=<value optimized out>) at thread/qwaitcondition_unix.cpp:159
#4  0x058f3862 in QHostInfoAgent::run (this=0x92df158) at kernel/qhostinfo.cpp:260
#5  0x009572c2 in QThreadPrivate::start (arg=0x92df158) at thread/qthread_unix.cpp:188
#6  0x00d408f5 in start_thread () from /lib/libpthread.so.0
#7  0x00726fce in clone () from /lib/libc.so.6

Thread 1 (Thread 0xb76ed7a0 (LWP 1925)):
[KCrash Handler]
#6  Tasks::itemTopMargin (this=<value optimized out>) at /usr/src/debug/kdebase-workspace-4.3.4/plasma/applets/tasks/tasks.h:92
#7  AbstractTaskItem::basicPreferredSize (this=<value optimized out>) at /usr/src/debug/kdebase-workspace-4.3.4/plasma/applets/tasks/abstracttaskitem.cpp:99
#8  0x00cb17eb in TaskItemLayout::preferredColumns (this=0x92f58a0) at /usr/src/debug/kdebase-workspace-4.3.4/plasma/applets/tasks/taskitemlayout.cpp:211
#9  0x00cb25ea in TaskItemLayout::gridLayoutSize (this=0x92f58a0) at /usr/src/debug/kdebase-workspace-4.3.4/plasma/applets/tasks/taskitemlayout.cpp:227
#10 0x00cb26ac in TaskItemLayout::layoutItems (this=0x92f58a0) at /usr/src/debug/kdebase-workspace-4.3.4/plasma/applets/tasks/taskitemlayout.cpp:250
#11 0x00cb38ca in TaskItemLayout::remove (this=0x92f58a0, item=0x9b29748) at /usr/src/debug/kdebase-workspace-4.3.4/plasma/applets/tasks/taskitemlayout.cpp:141
#12 0x00cb3b0c in TaskItemLayout::removeTaskItem (this=0x92f58a0, item=0x9b29748) at /usr/src/debug/kdebase-workspace-4.3.4/plasma/applets/tasks/taskitemlayout.cpp:93
#13 0x00cbf99e in TaskGroupItem::itemRemoved (this=0x92f7720, groupableItem=0x8fcd830) at /usr/src/debug/kdebase-workspace-4.3.4/plasma/applets/tasks/taskgroupitem.cpp:521
#14 0x00cc0e17 in TaskGroupItem::qt_metacall (this=0x92f7720, _c=QMetaObject::InvokeMetaMethod, _id=31, _a=0xbf971288)
    at /usr/src/debug/kdebase-workspace-4.3.4/i586-redhat-linux-gnu/plasma/applets/tasks/taskgroupitem.moc:114
#15 0x00a5cdc3 in QMetaObject::activate (sender=0x92f50d0, from_signal_index=22, to_signal_index=22, argv=0xbf971288) at kernel/qobject.cpp:3112
#16 0x00a5da22 in QMetaObject::activate (sender=0x92f50d0, m=0xf7c374, local_signal_index=1, argv=0xbf971288) at kernel/qobject.cpp:3186
#17 0x00f67523 in TaskManager::TaskGroup::itemRemoved (this=0x92f50d0, _t1=0x8fcd830) at /usr/src/debug/kdebase-workspace-4.3.4/i586-redhat-linux-gnu/libs/taskmanager/taskgroup.moc:152
#18 0x00f67d4b in TaskManager::TaskGroup::remove (this=0x92f50d0, item=0x8fcd830) at /usr/src/debug/kdebase-workspace-4.3.4/libs/taskmanager/taskgroup.cpp:189
#19 0x00f4f75d in TaskManager::GroupManagerPrivate::removeTask (this=0x926a560, task={d = 0x9b03be8}) at /usr/src/debug/kdebase-workspace-4.3.4/libs/taskmanager/groupmanager.cpp:311
#20 0x00f51573 in TaskManager::GroupManager::qt_metacall (this=0x92f67f8, _c=QMetaObject::InvokeMetaMethod, _id=11, _a=0xbf971468)
    at /usr/src/debug/kdebase-workspace-4.3.4/i586-redhat-linux-gnu/libs/taskmanager/groupmanager.moc:105
#21 0x00a5cdc3 in QMetaObject::activate (sender=0x92f48b8, from_signal_index=5, to_signal_index=5, argv=0xbf971468) at kernel/qobject.cpp:3112
#22 0x00a5da22 in QMetaObject::activate (sender=0x92f48b8, m=0xf7c53c, local_signal_index=1, argv=0xbf971468) at kernel/qobject.cpp:3186
#23 0x00f6af93 in TaskManager::TaskManager::taskRemoved (this=0x92f48b8, _t1={d = 0x9b03be8}) at /usr/src/debug/kdebase-workspace-4.3.4/i586-redhat-linux-gnu/libs/taskmanager/taskmanager.moc:162
#24 0x00f6cd12 in TaskManager::TaskManager::windowRemoved (this=0x92f48b8, w=125829145) at /usr/src/debug/kdebase-workspace-4.3.4/libs/taskmanager/taskmanager.cpp:278
#25 0x00f6e667 in TaskManager::TaskManager::qt_metacall (this=0x92f48b8, _c=QMetaObject::InvokeMetaMethod, _id=7, _a=0xbf9715e8)
    at /usr/src/debug/kdebase-workspace-4.3.4/i586-redhat-linux-gnu/libs/taskmanager/taskmanager.moc:110
#26 0x00a5cdc3 in QMetaObject::activate (sender=0x91bc870, from_signal_index=6, to_signal_index=6, argv=0xbf9715e8) at kernel/qobject.cpp:3112
#27 0x00a5da22 in QMetaObject::activate (sender=0x91bc870, m=0x45dd78c, local_signal_index=2, argv=0xbf9715e8) at kernel/qobject.cpp:3186
#28 0x0452a973 in KWindowSystem::windowRemoved (this=0x91bc870, _t1=125829145) at /usr/src/debug/kdelibs-4.3.4/i586-redhat-linux-gnu/kdeui/kwindowsystem.moc:127
#29 0x0452dbe6 in KWindowSystemPrivate::removeClient (this=0x91b7998, w=125829145) at /usr/src/debug/kdelibs-4.3.4/kdeui/windowmanagement/kwindowsystem_x11.cpp:249
#30 0x0453c13f in NETRootInfo::update (this=0x91b79ac, dirty_props=0xbf971778) at /usr/src/debug/kdelibs-4.3.4/kdeui/windowmanagement/netwm.cpp:2183
#31 0x0453cca7 in NETRootInfo::event (this=0x91b79ac, event=<value optimized out>, properties=0xbf971864, properties_size=5) at /usr/src/debug/kdelibs-4.3.4/kdeui/windowmanagement/netwm.cpp:2058
#32 0x0452de81 in KWindowSystemPrivate::x11Event (this=0x91b7998, ev=0xbf972e6c) at /usr/src/debug/kdelibs-4.3.4/kdeui/windowmanagement/kwindowsystem_x11.cpp:136
#33 0x043dab96 in KAppX11HackWidget::publicx11Event (e=<value optimized out>, this=<value optimized out>) at /usr/src/debug/kdelibs-4.3.4/kdeui/kernel/kapplication.cpp:900
#34 KApplication::x11EventFilter (e=<value optimized out>, this=<value optimized out>) at /usr/src/debug/kdelibs-4.3.4/kdeui/kernel/kapplication.cpp:950
#35 0x040e732a in PlasmaApp::x11EventFilter (this=0x8fc7f18, event=0xbf972e6c) at /usr/src/debug/kdebase-workspace-4.3.4/plasma/shells/desktop/plasmaapp.cpp:490
#36 0x05ce3860 in qt_x11EventFilter (ev=0xbf972e6c) at kernel/qapplication_x11.cpp:377
#37 0x05cf4b50 in QApplication::x11ProcessEvent (this=0x8fc7f18, event=0xbf972e6c) at kernel/qapplication_x11.cpp:3270
#38 0x05d21562 in x11EventSourceDispatch (s=0x8fd6100, callback=0, user_data=0x0) at kernel/qguieventdispatcher_glib.cpp:146
#39 0x00136308 in g_main_dispatch (context=<value optimized out>) at gmain.c:1824
#40 IA__g_main_context_dispatch (context=<value optimized out>) at gmain.c:2377
#41 0x001399e0 in g_main_context_iterate (context=0x8fd5490, block=<value optimized out>, dispatch=1, self=0x8fd2ef8) at gmain.c:2455
#42 0x00139b13 in IA__g_main_context_iteration (context=0x8fd5490, may_block=1) at gmain.c:2518
#43 0x00a71b7c in QEventDispatcherGlib::processEvents (this=0x8fb2d10, flags={i = 36}) at kernel/qeventdispatcher_glib.cpp:327
#44 0x05d20c45 in QGuiEventDispatcherGlib::processEvents (this=0x8fb2d10, flags={i = 36}) at kernel/qguieventdispatcher_glib.cpp:202
#45 0x00a45639 in QEventLoop::processEvents (this=0xbf973164, flags={i = 36}) at kernel/qeventloop.cpp:149
#46 0x00a45a8a in QEventLoop::exec (this=0xbf973164, flags={i = 0}) at kernel/qeventloop.cpp:201
#47 0x00a47f0f in QCoreApplication::exec () at kernel/qcoreapplication.cpp:888
#48 0x05c81737 in QApplication::exec () at kernel/qapplication.cpp:3525
#49 0x040d141d in kdemain (argc=1, argv=0xbf973344) at /usr/src/debug/kdebase-workspace-4.3.4/plasma/shells/desktop/main.cpp:50
#50 0x080486fb in main (argc=1, argv=0xbf973344) at /usr/src/debug/kdebase-workspace-4.3.4/i586-redhat-linux-gnu/plasma/shells/desktop/plasma-desktop_dummy.cpp:3

This bug may be a duplicate of or related to bug 222099

Reported using DrKonqi