Application that crashed: plasma-desktop
Version of the application: 0.3
KDE Version: 4.2.95 (KDE 4.2.95 (KDE 4.3 RC1))
Qt Version: 4.5.0
Operating System: Linux 2.6.28-13-generic x86_64
Distribution: Ubuntu 9.04

What I was doing when the application crashed:
Didn't even have a chance to do anything. The session was being restored and plasma just crashed. Restarting it from the crash handler worked.

 -- Backtrace:
Application: Plasma Workspace (kdeinit4), signal: Segmentation fault
[Current thread is 0 (LWP 4568)]

Thread 2 (Thread 0x7f15e5ccf950 (LWP 4571)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:261
#1  0x00007f1605df0939 in QWaitCondition::wait (this=0x19a9170, mutex=0x19a9168, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:87
#2  0x00007f1604c6d4cc in QHostInfoAgent::run (this=0x19a9150) at kernel/qhostinfo.cpp:260
#3  0x00007f1605def952 in QThreadPrivate::start (arg=0x19a9150) at thread/qthread_unix.cpp:189
#4  0x00007f1601c713ba in start_thread (arg=<value optimized out>) at pthread_create.c:297
#5  0x00007f1602855fcd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#6  0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7f16063ae750 (LWP 4568)):
[KCrash Handler]
#4  TaskManager::GroupManager::manualSortingRequest (this=0x0, taskItem=0x1c6e560, newIndex=0) at /build/buildd/kdebase-workspace-4.2.95/libs/taskmanager/groupmanager.cpp:363
#5  0x00007f15e8b60b3a in TaskManager::AbstractGroupingStrategy::closeGroup (this=0x1851280, group=0x1e8cb70)
    at /build/buildd/kdebase-workspace-4.2.95/libs/taskmanager/abstractgroupingstrategy.cpp:167
#6  0x00007f15e8b67da8 in TaskManager::ProgramGroupingStrategy::checkGroup (this=0x1851280) at /build/buildd/kdebase-workspace-4.2.95/libs/taskmanager/strategies/programgroupingstrategy.cpp:204
#7  0x00007f15e8b68c2d in TaskManager::ProgramGroupingStrategy::qt_metacall (this=0x1851280, _c=QMetaObject::InvokeMetaMethod, _id=0, _a=<value optimized out>)
    at /build/buildd/kdebase-workspace-4.2.95/obj-x86_64-linux-gnu/libs/taskmanager/programgroupingstrategy.moc:68
#8  0x00007f1605eee1f2 in QMetaObject::activate (sender=0x1e8cb70, from_signal_index=<value optimized out>, to_signal_index=22, argv=0x1) at kernel/qobject.cpp:3069
#9  0x00007f15e8b79a92 in TaskManager::TaskGroup::itemRemoved (this=0x0, _t1=0x1ccd4c0) at /build/buildd/kdebase-workspace-4.2.95/obj-x86_64-linux-gnu/libs/taskmanager/taskgroup.moc:146
#10 0x00007f15e8b7a3b1 in TaskManager::TaskGroup::remove (this=0x1e8cb70, item=0x1ccd4c0) at /build/buildd/kdebase-workspace-4.2.95/libs/taskmanager/taskgroup.cpp:182
#11 0x00007f15e8b62ed1 in TaskManager::GroupManagerPrivate::removeTask (this=0x15b7d10, task={d = 0x7fff0e3ebba0}) at /build/buildd/kdebase-workspace-4.2.95/libs/taskmanager/groupmanager.cpp:311
#12 0x00007f15e8b6551d in TaskManager::GroupManager::qt_metacall (this=0x15b7ce0, _c=<value optimized out>, _id=<value optimized out>, _a=0x7fff0e3ebce0)
    at /build/buildd/kdebase-workspace-4.2.95/obj-x86_64-linux-gnu/libs/taskmanager/groupmanager.moc:105
#13 0x00007f1605eee1f2 in QMetaObject::activate (sender=0x15b7e10, from_signal_index=<value optimized out>, to_signal_index=5, argv=0x1) at kernel/qobject.cpp:3069
#14 0x00007f15e8b7cf35 in TaskManager::TaskManager::taskRemoved (this=0x0, _t1=<value optimized out>)
    at /build/buildd/kdebase-workspace-4.2.95/obj-x86_64-linux-gnu/libs/taskmanager/taskmanager.moc:162
#15 0x00007f15e8b7e56e in TaskManager::TaskManager::windowRemoved (this=0x15b7e10, w=14680401) at /build/buildd/kdebase-workspace-4.2.95/libs/taskmanager/taskmanager.cpp:279
#16 0x00007f15e8b802bf in TaskManager::TaskManager::qt_metacall (this=0x15b7e10, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x7fff0e3ebf00)
    at /build/buildd/kdebase-workspace-4.2.95/obj-x86_64-linux-gnu/libs/taskmanager/taskmanager.moc:110
#17 0x00007f1605eee1f2 in QMetaObject::activate (sender=0x131aff0, from_signal_index=<value optimized out>, to_signal_index=6, argv=0x1) at kernel/qobject.cpp:3069
#18 0x00007f16046d2ab2 in KWindowSystem::windowRemoved (this=0x0, _t1=14680401) at /build/buildd/kde4libs-4.2.95/obj-x86_64-linux-gnu/kdeui/kwindowsystem.moc:127
#19 0x00007f16046d4ffb in KWindowSystemPrivate::removeClient (this=0x131b280, w=14680401) at /build/buildd/kde4libs-4.2.95/kdeui/windowmanagement/kwindowsystem_x11.cpp:249
#20 0x00007f16046e3fe1 in NETRootInfo::update (this=0x131b2a8, dirty_props=<value optimized out>) at /build/buildd/kde4libs-4.2.95/kdeui/windowmanagement/netwm.cpp:2135
#21 0x00007f16046e436b in NETRootInfo::event (this=0x131b2a8, event=<value optimized out>, properties=0x7fff0e3ec1f0, properties_size=5)
    at /build/buildd/kde4libs-4.2.95/kdeui/windowmanagement/netwm.cpp:2058
#22 0x00007f16046d52cb in KWindowSystemPrivate::x11Event (this=0x131b280, ev=0x7fff0e3ecbe0) at /build/buildd/kde4libs-4.2.95/kdeui/windowmanagement/kwindowsystem_x11.cpp:136
#23 0x00007f16045a4a43 in KApplication::x11EventFilter (this=<value optimized out>, _event=0x7fff0e3ecbe0) at /build/buildd/kde4libs-4.2.95/kdeui/kernel/kapplication.cpp:911
#24 0x00007f15f9beeb57 in PlasmaApp::x11EventFilter (this=0x1060180, event=0x7fff0e3ecbe0) at /build/buildd/kdebase-workspace-4.2.95/plasma/shells/desktop/plasmaapp.cpp:490
#25 0x00007f16034beb1f in qt_x11EventFilter (ev=0x7fff0e3ecbe0) at kernel/qapplication_x11.cpp:375
#26 0x00007f16034d1faf in QApplication::x11ProcessEvent (this=0x1060180, event=0x7fff0e3ecbe0) at kernel/qapplication_x11.cpp:3273
#27 0x00007f16034fb464 in x11EventSourceDispatch (s=0x10a5230, callback=0, user_data=0x0) at kernel/qguieventdispatcher_glib.cpp:146
#28 0x00007f1601ec020a in IA__g_main_context_dispatch (context=0x10a3640) at /build/buildd/glib2.0-2.20.1/glib/gmain.c:1814
#29 0x00007f1601ec38e0 in g_main_context_iterate (context=0x10a3640, block=1, dispatch=1, self=<value optimized out>) at /build/buildd/glib2.0-2.20.1/glib/gmain.c:2448
#30 0x00007f1601ec3a7c in IA__g_main_context_iteration (context=0x10a3640, may_block=1) at /build/buildd/glib2.0-2.20.1/glib/gmain.c:2511
#31 0x00007f1605f01e6f in QEventDispatcherGlib::processEvents (this=0x10a0ba0, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:323
#32 0x00007f16034fabef in QGuiEventDispatcherGlib::processEvents (this=0x0, flags=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:202
#33 0x00007f1605ed7002 in QEventLoop::processEvents (this=<value optimized out>, flags={i = 238997200}) at kernel/qeventloop.cpp:149
#34 0x00007f1605ed73cd in QEventLoop::exec (this=0x7fff0e3ecf10, flags={i = 238997280}) at kernel/qeventloop.cpp:200
#35 0x00007f1605ed9694 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:880
#36 0x00007f15f9bdb63b in kdemain (argc=1, argv=0x100b8f0) at /build/buildd/kdebase-workspace-4.2.95/plasma/shells/desktop/main.cpp:50
#37 0x000000000040714e in launch (argc=1, _name=0x106d788 "/usr/bin/plasma-desktop", args=<value optimized out>, cwd=0x0, envc=0, envs=0x106d7a8 "", reset_env=false, tty=0x0, avoid_loops=false, 
    startup_id_str=0x40a309 "0") at /build/buildd/kde4libs-4.2.95/kinit/kinit.cpp:672
#38 0x0000000000407978 in handle_launcher_request (sock=7, who=<value optimized out>) at /build/buildd/kde4libs-4.2.95/kinit/kinit.cpp:1164
#39 0x0000000000407f25 in handle_requests (waitForPid=0) at /build/buildd/kde4libs-4.2.95/kinit/kinit.cpp:1357
#40 0x0000000000408a66 in main (argc=2, argv=0x7fff0e3edda8, envp=0x7fff0e3eddc0) at /build/buildd/kde4libs-4.2.95/kinit/kinit.cpp:1784

Reported using DrKonqi