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:
Plasma-desktop still crashing, i changes desktop very often maybe it's problem with that

 -- Backtrace:
Application: Plasma Workspace (plasma-desktop), signal: Segmentation fault
[Current thread is 0 (LWP 9427)]

Thread 2 (Thread 0x7f8c23354950 (LWP 9428)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:261
#1  0x00007f8c41052939 in QWaitCondition::wait (this=0x27c5650, mutex=0x27c5648, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:87
#2  0x00007f8c446164cc in QHostInfoAgent::run (this=0x27c5630) at kernel/qhostinfo.cpp:260
#3  0x00007f8c41051952 in QThreadPrivate::start (arg=0x27c5630) at thread/qthread_unix.cpp:189
#4  0x00007f8c3d7513ba in start_thread (arg=<value optimized out>) at pthread_create.c:297
#5  0x00007f8c405aefcd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#6  0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7f8c45d0d760 (LWP 9427)):
[KCrash Handler]
#5  TaskManager::GroupManager::manualSortingRequest (this=0x0, taskItem=0x385f7b0, newIndex=0) at /build/buildd/kdebase-workspace-4.2.95/libs/taskmanager/groupmanager.cpp:363
#6  0x00007f8c27c3cb3a in TaskManager::AbstractGroupingStrategy::closeGroup (this=0x3a38ba0, group=0x2f06fd0)
    at /build/buildd/kdebase-workspace-4.2.95/libs/taskmanager/abstractgroupingstrategy.cpp:167
#7  0x00007f8c27c43da8 in TaskManager::ProgramGroupingStrategy::checkGroup (this=0x3a38ba0) at /build/buildd/kdebase-workspace-4.2.95/libs/taskmanager/strategies/programgroupingstrategy.cpp:204
#8  0x00007f8c27c44c2d in TaskManager::ProgramGroupingStrategy::qt_metacall (this=0x3a38ba0, _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
#9  0x00007f8c411501f2 in QMetaObject::activate (sender=0x2f06fd0, from_signal_index=<value optimized out>, to_signal_index=22, argv=0x1) at kernel/qobject.cpp:3069
#10 0x00007f8c27c55a92 in TaskManager::TaskGroup::itemRemoved (this=0x0, _t1=0x39faac0) at /build/buildd/kdebase-workspace-4.2.95/obj-x86_64-linux-gnu/libs/taskmanager/taskgroup.moc:146
#11 0x00007f8c27c563b1 in TaskManager::TaskGroup::remove (this=0x2f06fd0, item=0x39faac0) at /build/buildd/kdebase-workspace-4.2.95/libs/taskmanager/taskgroup.cpp:182
#12 0x00007f8c27c3eed1 in TaskManager::GroupManagerPrivate::removeTask (this=0x2154990, task={d = 0x7fff4dd4fa60}) at /build/buildd/kdebase-workspace-4.2.95/libs/taskmanager/groupmanager.cpp:311
#13 0x00007f8c27c4151d in TaskManager::GroupManager::qt_metacall (this=0x2153b00, _c=<value optimized out>, _id=<value optimized out>, _a=0x7fff4dd4fba0)
    at /build/buildd/kdebase-workspace-4.2.95/obj-x86_64-linux-gnu/libs/taskmanager/groupmanager.moc:105
#14 0x00007f8c411501f2 in QMetaObject::activate (sender=0x2153bc0, from_signal_index=<value optimized out>, to_signal_index=5, argv=0x1) at kernel/qobject.cpp:3069
#15 0x00007f8c27c58f35 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
#16 0x00007f8c27c5a56e in TaskManager::TaskManager::windowRemoved (this=0x2153bc0, w=52490541) at /build/buildd/kdebase-workspace-4.2.95/libs/taskmanager/taskmanager.cpp:279
#17 0x00007f8c27c5c2bf in TaskManager::TaskManager::qt_metacall (this=0x2153bc0, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x7fff4dd4fdc0)
    at /build/buildd/kdebase-workspace-4.2.95/obj-x86_64-linux-gnu/libs/taskmanager/taskmanager.moc:110
#18 0x00007f8c411501f2 in QMetaObject::activate (sender=0x1c5deb0, from_signal_index=<value optimized out>, to_signal_index=6, argv=0x1) at kernel/qobject.cpp:3069
#19 0x00007f8c4407bab2 in KWindowSystem::windowRemoved (this=0x0, _t1=52490541) at /build/buildd/kde4libs-4.2.95/obj-x86_64-linux-gnu/kdeui/kwindowsystem.moc:127
#20 0x00007f8c4407dffb in KWindowSystemPrivate::removeClient (this=0x1d33cb0, w=52490541) at /build/buildd/kde4libs-4.2.95/kdeui/windowmanagement/kwindowsystem_x11.cpp:249
#21 0x00007f8c4408d030 in NETRootInfo::update (this=0x1d33cd8, dirty_props=<value optimized out>) at /build/buildd/kde4libs-4.2.95/kdeui/windowmanagement/netwm.cpp:2131
#22 0x00007f8c4408d36b in NETRootInfo::event (this=0x1d33cd8, event=<value optimized out>, properties=0x7fff4dd500b0, properties_size=5)
    at /build/buildd/kde4libs-4.2.95/kdeui/windowmanagement/netwm.cpp:2058
#23 0x00007f8c4407e2cb in KWindowSystemPrivate::x11Event (this=0x1d33cb0, ev=0x7fff4dd50aa0) at /build/buildd/kde4libs-4.2.95/kdeui/windowmanagement/kwindowsystem_x11.cpp:136
#24 0x00007f8c43f4da43 in KApplication::x11EventFilter (this=<value optimized out>, _event=0x7fff4dd50aa0) at /build/buildd/kde4libs-4.2.95/kdeui/kernel/kapplication.cpp:911
#25 0x00007f8c458fbb57 in PlasmaApp::x11EventFilter (this=0x19d9bc0, event=0x7fff4dd50aa0) at /build/buildd/kdebase-workspace-4.2.95/plasma/shells/desktop/plasmaapp.cpp:490
#26 0x00007f8c418dbb1f in qt_x11EventFilter (ev=0x7fff4dd50aa0) at kernel/qapplication_x11.cpp:375
#27 0x00007f8c418eefaf in QApplication::x11ProcessEvent (this=0x19d9bc0, event=0x7fff4dd50aa0) at kernel/qapplication_x11.cpp:3273
#28 0x00007f8c41918464 in x11EventSourceDispatch (s=0x19edcc0, callback=0, user_data=0x0) at kernel/qguieventdispatcher_glib.cpp:146
#29 0x00007f8c3bb2120a in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#30 0x00007f8c3bb248e0 in ?? () from /usr/lib/libglib-2.0.so.0
#31 0x00007f8c3bb24a7c in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#32 0x00007f8c41163e6f in QEventDispatcherGlib::processEvents (this=0x19c15f0, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:323
#33 0x00007f8c41917bef in QGuiEventDispatcherGlib::processEvents (this=0x0, flags=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:202
#34 0x00007f8c41139002 in QEventLoop::processEvents (this=<value optimized out>, flags={i = 1305808272}) at kernel/qeventloop.cpp:149
#35 0x00007f8c411393cd in QEventLoop::exec (this=0x7fff4dd50dd0, flags={i = 1305808352}) at kernel/qeventloop.cpp:200
#36 0x00007f8c4113b694 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:880
#37 0x00007f8c458e863b in kdemain (argc=1, argv=0x7fff4dd510d8) at /build/buildd/kdebase-workspace-4.2.95/plasma/shells/desktop/main.cpp:50
#38 0x00007f8c404e75a6 in __libc_start_main (main=0x400890 <main>, argc=1, ubp_av=0x7fff4dd510d8, init=0x4008c0 <__libc_csu_init>, fini=<value optimized out>, rtld_fini=<value optimized out>, 
    stack_end=0x7fff4dd510c8) at libc-start.c:220
#39 0x00000000004007c9 in _start () at ../sysdeps/x86_64/elf/start.S:113

This bug may be a duplicate of or related to bug 198541

Reported using DrKonqi