Application that crashed: plasma-desktop
Version of the application: 0.3
KDE Version: 4.3.1 (KDE 4.3.1)
Qt Version: 4.5.2
Operating System: Linux 2.6.28-15-generic i686
Distribution: Ubuntu 9.04

What I was doing when the application crashed:
Before the crash, I saw some strange behaviour in the taskbar: it showed a groupd of Konqueror windows as the first (left-most) item, but they were shifted to the right as if there was another taskbar item. Closing all konqueror windows resulted in a crash.

 -- Backtrace:
Application: Plasma Workspace (kdeinit4), signal: Segmentation fault
[Current thread is 0 (LWP 30951)]

Thread 2 (Thread 0xa83e6b90 (LWP 30953)):
#0  0xb7fbb430 in __kernel_vsyscall ()
#1  0xb64cc0e5 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/tls/i686/cmov/libpthread.so.0
#2  0xb66ac2ed in pthread_cond_wait () from /lib/tls/i686/cmov/libc.so.6
#3  0xb7db2172 in QWaitCondition::wait (this=0xa1b70e0, mutex=0xa1b70dc, time=4294967295) at thread/qwaitcondition_unix.cpp:87
#4  0xb76efac2 in QHostInfoAgent::run (this=0xa1b70d0) at kernel/qhostinfo.cpp:260
#5  0xb7db1132 in QThreadPrivate::start (arg=0xa1b70d0) at thread/qthread_unix.cpp:188
#6  0xb64c84ff in start_thread () from /lib/tls/i686/cmov/libpthread.so.0
#7  0xb669d49e in clone () from /lib/tls/i686/cmov/libc.so.6

Thread 1 (Thread 0xb5fd5a10 (LWP 30951)):
[KCrash Handler]
#6  0xa8686436 in TaskItemLayout::layoutItems (this=0xa1150c0) at /build/buildd/kdebase-workspace-4.3.1/plasma/applets/tasks/taskitemlayout.cpp:320
#7  0xa8686d12 in TaskItemLayout::insert (this=0xa1150c0, index=4, item=0xb4831b8) at /build/buildd/kdebase-workspace-4.3.1/plasma/applets/tasks/taskitemlayout.cpp:125
#8  0xa8686f07 in TaskItemLayout::addTaskItem (this=0xa1150c0, item=0xb4831b8) at /build/buildd/kdebase-workspace-4.3.1/plasma/applets/tasks/taskitemlayout.cpp:82
#9  0xa8693c45 in TaskGroupItem::itemAdded (this=0xa1144e8, groupableItem=0xa1428e8) at /build/buildd/kdebase-workspace-4.3.1/plasma/applets/tasks/taskgroupitem.cpp:477
#10 0xa86942ac in TaskGroupItem::qt_metacall (this=0xa1144e8, _c=QMetaObject::InvokeMetaMethod, _id=14, _a=0xbfcd447c)
    at /build/buildd/kdebase-workspace-4.3.1/obj-i486-linux-gnu/plasma/applets/tasks/taskgroupitem.moc:113
#11 0xb7ebb1b8 in QMetaObject::activate (sender=0xa114e70, from_signal_index=21, to_signal_index=21, argv=0xbfcd447c) at kernel/qobject.cpp:3113
#12 0xb7ebbe42 in QMetaObject::activate (sender=0xa114e70, m=0xa8652b74, local_signal_index=0, argv=0xbfcd447c) at kernel/qobject.cpp:3187
#13 0xa8643f33 in TaskManager::TaskGroup::itemAdded (this=0xa114e70, _t1=0xa1428e8) at /build/buildd/kdebase-workspace-4.3.1/obj-i486-linux-gnu/libs/taskmanager/taskgroup.moc:139
#14 0xa8644b95 in TaskManager::TaskGroup::add (this=0xa114e70, item=0xa1428e8) at /build/buildd/kdebase-workspace-4.3.1/libs/taskmanager/taskgroup.cpp:138
#15 0xa8628383 in TaskManager::AbstractGroupingStrategy::closeGroup (this=0xa8b1070, group=0x9fdeed0) at /build/buildd/kdebase-workspace-4.3.1/libs/taskmanager/abstractgroupingstrategy.cpp:168
#16 0xa8630077 in TaskManager::ProgramGroupingStrategy::checkGroup (this=0xa8b1070) at /build/buildd/kdebase-workspace-4.3.1/libs/taskmanager/strategies/programgroupingstrategy.cpp:204
#17 0xa8630fab in TaskManager::ProgramGroupingStrategy::qt_metacall (this=0xa8b1070, _c=QMetaObject::InvokeMetaMethod, _id=0, _a=0xbfcd465c)
    at /build/buildd/kdebase-workspace-4.3.1/obj-i486-linux-gnu/libs/taskmanager/programgroupingstrategy.moc:68
#18 0xb7ebb1b8 in QMetaObject::activate (sender=0x9fdeed0, from_signal_index=22, to_signal_index=22, argv=0xbfcd465c) at kernel/qobject.cpp:3113
#19 0xb7ebbe42 in QMetaObject::activate (sender=0x9fdeed0, m=0xa8652b74, local_signal_index=1, argv=0xbfcd465c) at kernel/qobject.cpp:3187
#20 0xa8643ee3 in TaskManager::TaskGroup::itemRemoved (this=0x9fdeed0, _t1=0xa19bab0) at /build/buildd/kdebase-workspace-4.3.1/obj-i486-linux-gnu/libs/taskmanager/taskgroup.moc:146
#21 0xa864490b in TaskManager::TaskGroup::remove (this=0x9fdeed0, item=0xa19bab0) at /build/buildd/kdebase-workspace-4.3.1/libs/taskmanager/taskgroup.cpp:182
#22 0xa862b81d in TaskManager::GroupManagerPrivate::removeTask (this=0xa429b68, task={d = 0xbfcd471c}) at /build/buildd/kdebase-workspace-4.3.1/libs/taskmanager/groupmanager.cpp:311
#23 0xa862d17a in TaskManager::GroupManager::qt_metacall (this=0xa429c38, _c=QMetaObject::InvokeMetaMethod, _id=11, _a=0xbfcd47fc)
    at /build/buildd/kdebase-workspace-4.3.1/obj-i486-linux-gnu/libs/taskmanager/groupmanager.moc:105
#24 0xb7ebb1b8 in QMetaObject::activate (sender=0xa1be9f0, from_signal_index=5, to_signal_index=5, argv=0xbfcd47fc) at kernel/qobject.cpp:3113
#25 0xb7ebbe42 in QMetaObject::activate (sender=0xa1be9f0, m=0xa8652d3c, local_signal_index=1, argv=0xbfcd47fc) at kernel/qobject.cpp:3187
#26 0xa8647983 in TaskManager::TaskManager::taskRemoved (this=0xa1be9f0, _t1={d = 0xbfcd4844}) at /build/buildd/kdebase-workspace-4.3.1/obj-i486-linux-gnu/libs/taskmanager/taskmanager.moc:162
#27 0xa864922f in TaskManager::TaskManager::windowRemoved (this=0xa1be9f0, w=54526422) at /build/buildd/kdebase-workspace-4.3.1/libs/taskmanager/taskmanager.cpp:279
#28 0xa864b14c in TaskManager::TaskManager::qt_metacall (this=0xa1be9f0, _c=QMetaObject::InvokeMetaMethod, _id=7, _a=0xbfcd496c)
    at /build/buildd/kdebase-workspace-4.3.1/obj-i486-linux-gnu/libs/taskmanager/taskmanager.moc:110
#29 0xb7ebb1b8 in QMetaObject::activate (sender=0xa06f250, from_signal_index=6, to_signal_index=6, argv=0xbfcd496c) at kernel/qobject.cpp:3113
#30 0xb7ebbe42 in QMetaObject::activate (sender=0xa06f250, m=0xb762824c, local_signal_index=2, argv=0xbfcd496c) at kernel/qobject.cpp:3187
#31 0xb75bf4f3 in KWindowSystem::windowRemoved (this=0xa06f250, _t1=54526422) at /build/buildd/kde4libs-4.3.1/obj-i486-linux-gnu/kdeui/kwindowsystem.moc:127
#32 0xb75c1d76 in KWindowSystemPrivate::removeClient (this=0x9e6f568, w=54526422) at /build/buildd/kde4libs-4.3.1/kdeui/windowmanagement/kwindowsystem_x11.cpp:249
#33 0xb75d0c1d in NETRootInfo::update (this=0x9e6f57c, dirty_props=0xbfcd4ad4) at /build/buildd/kde4libs-4.3.1/kdeui/windowmanagement/netwm.cpp:2183
#34 0xb75d191f in NETRootInfo::event (this=0x9e6f57c, event=0xbfcd623c, properties=0xbfcd4bb8, properties_size=5) at /build/buildd/kde4libs-4.3.1/kdeui/windowmanagement/netwm.cpp:2058
#35 0xb75c200d in KWindowSystemPrivate::x11Event (this=0x9e6f568, ev=0xbfcd61dc) at /build/buildd/kde4libs-4.3.1/kdeui/windowmanagement/kwindowsystem_x11.cpp:136
#36 0xb7472b79 in KApplication::x11EventFilter (this=0x9d853c0, _event=0xbfcd61dc) at /build/buildd/kde4libs-4.3.1/kdeui/kernel/kapplication.cpp:911
#37 0xb3bd7c37 in PlasmaApp::x11EventFilter (this=0x9d853c0, event=0xbfcd61dc) at /build/buildd/kdebase-workspace-4.3.1/plasma/shells/desktop/plasmaapp.cpp:490
#38 0xb69c5e5e in qt_x11EventFilter (ev=0xbfcd61dc) at kernel/qapplication_x11.cpp:375
#39 0xb69d86df in QApplication::x11ProcessEvent (this=0x9d853c0, event=0xbfcd61dc) at kernel/qapplication_x11.cpp:3271
#40 0xb6a0537a in x11EventSourceDispatch (s=0x9d8dd68, callback=0, user_data=0x0) at kernel/qguieventdispatcher_glib.cpp:146
#41 0xb6515b88 in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#42 0xb65190eb in ?? () from /usr/lib/libglib-2.0.so.0
#43 0xb6519268 in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#44 0xb7ed12f8 in QEventDispatcherGlib::processEvents (this=0x9d8abd0, flags={i = -1077058664}) at kernel/qeventdispatcher_glib.cpp:327
#45 0xb6a04a75 in QGuiEventDispatcherGlib::processEvents (this=0x9d8abd0, flags={i = -1077058616}) at kernel/qguieventdispatcher_glib.cpp:202
#46 0xb7ea41fa in QEventLoop::processEvents (this=0xbfcd6440, flags={i = -1077058552}) at kernel/qeventloop.cpp:149
#47 0xb7ea4642 in QEventLoop::exec (this=0xbfcd6440, flags={i = -1077058488}) at kernel/qeventloop.cpp:201
#48 0xb7ea6ae9 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:888
#49 0xb6962bb7 in QApplication::exec () at kernel/qapplication.cpp:3525
#50 0xb3bc2310 in kdemain (argc=1, argv=0x9d52a50) at /build/buildd/kdebase-workspace-4.3.1/plasma/shells/desktop/main.cpp:50
#51 0x0804e27d in launch (argc=1, _name=0x9d72424 "/usr/bin/plasma-desktop", args=0x9d7243c "", cwd=0x0, envc=0, envs=0x9d72440 "", reset_env=false, tty=0x0, avoid_loops=false, 
    startup_id_str=0x805136d "0") at /build/buildd/kde4libs-4.3.1/kinit/kinit.cpp:677
#52 0x0804ea5d in handle_launcher_request (sock=7, who=<value optimized out>) at /build/buildd/kde4libs-4.3.1/kinit/kinit.cpp:1169
#53 0x0804efe5 in handle_requests (waitForPid=0) at /build/buildd/kde4libs-4.3.1/kinit/kinit.cpp:1362
#54 0x0804fbca in main (argc=2, argv=0xbfcd6c34, envp=0xbfcd6c40) at /build/buildd/kde4libs-4.3.1/kinit/kinit.cpp:1793

This bug may be a duplicate of or related to bug 199325

Reported using DrKonqi