Application that crashed: plasma-desktop
Version of the application: 0.3
KDE Version: 4.2.90 (KDE 4.2.90 (KDE 4.3 Beta2))
Qt Version: 4.5.0
Operating System: Linux 2.6.29-02062904-generic x86_64
Distribution: Ubuntu 9.04

What I was doing when the application crashed:
After login-in plasma crashes.

 -- Backtrace:
Application: Plasma Workspace (kdeinit), signal: Segmentation fault
[Current thread is 0 (LWP 16737)]

Thread 2 (Thread 0x7fa4523a9950 (LWP 16738)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:261
#1  0x00007fa473671939 in QWaitCondition::wait (this=0x2b26af0, mutex=0x2b26ae8, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:87
#2  0x00007fa4724ee4cc in QHostInfoAgent::run (this=0x2b26ad0) at kernel/qhostinfo.cpp:260
#3  0x00007fa473670952 in QThreadPrivate::start (arg=0x2b26ad0) at thread/qthread_unix.cpp:189
#4  0x00007fa46f4f23ba in start_thread (arg=<value optimized out>) at pthread_create.c:297
#5  0x00007fa4700d6fcd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#6  0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7fa473c35750 (LWP 16737)):
[KCrash Handler]
#5  0x00007fa4565af84c in TaskManager::AbstractGroupingStrategy::closeGroup () from /usr/lib/libtaskmanager.so.4
#6  0x00007fa4565b6908 in ?? () from /usr/lib/libtaskmanager.so.4
#7  0x00007fa4565b74ed in ?? () from /usr/lib/libtaskmanager.so.4
#8  0x00007fa47376f1f2 in QMetaObject::activate (sender=0x38407d0, from_signal_index=<value optimized out>, to_signal_index=22, argv=0x1) at kernel/qobject.cpp:3069
#9  0x00007fa4565c8572 in TaskManager::TaskGroup::itemRemoved () from /usr/lib/libtaskmanager.so.4
#10 0x00007fa4565b1fe2 in ?? () from /usr/lib/libtaskmanager.so.4
#11 0x00007fa4565b3f7d in TaskManager::GroupManager::qt_metacall () from /usr/lib/libtaskmanager.so.4
#12 0x00007fa47376f1f2 in QMetaObject::activate (sender=0x29b8270, from_signal_index=<value optimized out>, to_signal_index=5, argv=0x1) at kernel/qobject.cpp:3069
#13 0x00007fa4565cb7e5 in TaskManager::TaskManager::taskRemoved () from /usr/lib/libtaskmanager.so.4
#14 0x00007fa4565cccee in TaskManager::TaskManager::windowRemoved () from /usr/lib/libtaskmanager.so.4
#15 0x00007fa4565cebef in TaskManager::TaskManager::qt_metacall () from /usr/lib/libtaskmanager.so.4
#16 0x00007fa47376f1f2 in QMetaObject::activate (sender=0x24abde0, from_signal_index=<value optimized out>, to_signal_index=6, argv=0x1) at kernel/qobject.cpp:3069
#17 0x00007fa471f53462 in KWindowSystem::windowRemoved (this=0x219f158, _t1=79691807) at /build/buildd/kde4libs-4.2.90/obj-x86_64-linux-gnu/kdeui/kwindowsystem.moc:127
#18 0x00007fa471f559ab in KWindowSystemPrivate::removeClient (this=0x24ac070, w=79691807) at /build/buildd/kde4libs-4.2.90/kdeui/windowmanagement/kwindowsystem_x11.cpp:249
#19 0x00007fa471f64991 in NETRootInfo::update (this=0x24ac098, dirty_props=<value optimized out>) at /build/buildd/kde4libs-4.2.90/kdeui/windowmanagement/netwm.cpp:2130
#20 0x00007fa471f64d1b in NETRootInfo::event (this=0x24ac098, event=<value optimized out>, properties=0x7fff7bc6f150, properties_size=5)
    at /build/buildd/kde4libs-4.2.90/kdeui/windowmanagement/netwm.cpp:2053
#21 0x00007fa471f55c7b in KWindowSystemPrivate::x11Event (this=0x24ac070, ev=0x7fff7bc6fb30) at /build/buildd/kde4libs-4.2.90/kdeui/windowmanagement/kwindowsystem_x11.cpp:136
#22 0x00007fa471e25483 in KApplication::x11EventFilter (this=<value optimized out>, _event=0x7fff7bc6fb30) at /build/buildd/kde4libs-4.2.90/kdeui/kernel/kapplication.cpp:911
#23 0x00007fa46760e817 in ?? () from /usr/lib/libkdeinit4_plasma-desktop.so
#24 0x00007fa470d3fb1f in qt_x11EventFilter (ev=0x7fff7bc6fb30) at kernel/qapplication_x11.cpp:375
#25 0x00007fa470d52faf in QApplication::x11ProcessEvent (this=0x21f1cd0, event=0x7fff7bc6fb30) at kernel/qapplication_x11.cpp:3273
#26 0x00007fa470d54d3c in QETWidget::translateMouseEvent (this=0x2d68a00, event=0x7fff7bc70470) at kernel/qapplication_x11.cpp:4157
#27 0x00007fa470d53a88 in QApplication::x11ProcessEvent (this=0x21f1cd0, event=0x7fff7bc70470) at kernel/qapplication_x11.cpp:3543
#28 0x00007fa470d7c464 in x11EventSourceDispatch (s=0x2236ce0, callback=0, user_data=0x0) at kernel/qguieventdispatcher_glib.cpp:146
#29 0x00007fa46f74120a in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#30 0x00007fa46f7448e0 in ?? () from /usr/lib/libglib-2.0.so.0
#31 0x00007fa46f744a7c in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#32 0x00007fa473782e6f in QEventDispatcherGlib::processEvents (this=0x2232650, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:323
#33 0x00007fa470d7bbef in QGuiEventDispatcherGlib::processEvents (this=0x219f158, flags=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:202
#34 0x00007fa473758002 in QEventLoop::processEvents (this=<value optimized out>, flags={i = 2076641120}) at kernel/qeventloop.cpp:149
#35 0x00007fa4737583cd in QEventLoop::exec (this=0x7fff7bc707a0, flags={i = 2076641200}) at kernel/qeventloop.cpp:200
#36 0x00007fa47375a694 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:880
#37 0x00007fa4675fb7eb in kdemain () from /usr/lib/libkdeinit4_plasma-desktop.so
#38 0x000000000040714e in launch (argc=1, _name=0x21ff428 "/usr/bin/plasma-desktop", args=<value optimized out>, cwd=0x0, envc=0, envs=0x21ff448 "", reset_env=false, tty=0x0, avoid_loops=false, 
    startup_id_str=0x40a308 "0") at /build/buildd/kde4libs-4.2.90/kinit/kinit.cpp:671
#39 0x0000000000407978 in handle_launcher_request (sock=7, who=<value optimized out>) at /build/buildd/kde4libs-4.2.90/kinit/kinit.cpp:1163
#40 0x0000000000407f25 in handle_requests (waitForPid=0) at /build/buildd/kde4libs-4.2.90/kinit/kinit.cpp:1356
#41 0x0000000000408a66 in main (argc=2, argv=0x7fff7bc71638, envp=0x7fff7bc71650) at /build/buildd/kde4libs-4.2.90/kinit/kinit.cpp:1783

Reported using DrKonqi