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:
kubuntu 9.04 w/KDE 4.3RC1
firefox open with gmail
kontact open on mail
2 konsole windows open

closed one konsole window and Plasma crashed. Plasma reloaded within seconds and seems to be working fine.

 -- Backtrace:
Application: Plasma Workspace (kdeinit4), signal: Segmentation fault
[Current thread is 0 (LWP 3410)]

Thread 2 (Thread 0x7fdaa73c4950 (LWP 3413)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:261
#1  0x00007fdac7e78939 in QWaitCondition::wait (this=0x1a05190, mutex=0x1a05188, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:87
#2  0x00007fdac6cf54cc in QHostInfoAgent::run (this=0x1a05170) at kernel/qhostinfo.cpp:260
#3  0x00007fdac7e77952 in QThreadPrivate::start (arg=0x1a05170) at thread/qthread_unix.cpp:189
#4  0x00007fdac3cf93ba in start_thread (arg=<value optimized out>) at pthread_create.c:297
#5  0x00007fdac48ddfcd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#6  0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7fdac843a750 (LWP 3410)):
[KCrash Handler]
#4  0x00007fdaab48e766 in TaskManager::GroupManager::manualSortingRequest () from /usr/lib/libtaskmanager.so.4
#5  0x00007fdaab48cb3a in TaskManager::AbstractGroupingStrategy::closeGroup () from /usr/lib/libtaskmanager.so.4
#6  0x00007fdaab493da8 in ?? () from /usr/lib/libtaskmanager.so.4
#7  0x00007fdaab494c2d in ?? () from /usr/lib/libtaskmanager.so.4
#8  0x00007fdac7f761f2 in QMetaObject::activate (sender=0x1bb1a90, from_signal_index=<value optimized out>, to_signal_index=22, argv=0x1) at kernel/qobject.cpp:3069
#9  0x00007fdaab4a5a92 in TaskManager::TaskGroup::itemRemoved () from /usr/lib/libtaskmanager.so.4
#10 0x00007fdaab4a63b1 in TaskManager::TaskGroup::remove () from /usr/lib/libtaskmanager.so.4
#11 0x00007fdaab48eed1 in ?? () from /usr/lib/libtaskmanager.so.4
#12 0x00007fdaab49151d in TaskManager::GroupManager::qt_metacall () from /usr/lib/libtaskmanager.so.4
#13 0x00007fdac7f761f2 in QMetaObject::activate (sender=0x182aea0, from_signal_index=<value optimized out>, to_signal_index=5, argv=0x1) at kernel/qobject.cpp:3069
#14 0x00007fdaab4a8f35 in TaskManager::TaskManager::taskRemoved () from /usr/lib/libtaskmanager.so.4
#15 0x00007fdaab4aa56e in TaskManager::TaskManager::windowRemoved () from /usr/lib/libtaskmanager.so.4
#16 0x00007fdaab4ac2bf in TaskManager::TaskManager::qt_metacall () from /usr/lib/libtaskmanager.so.4
#17 0x00007fdac7f761f2 in QMetaObject::activate (sender=0xf17a60, from_signal_index=<value optimized out>, to_signal_index=6, argv=0x1) at kernel/qobject.cpp:3069
#18 0x00007fdac675aab2 in KWindowSystem::windowRemoved (this=0x0, _t1=39848460) at /build/buildd/kde4libs-4.2.95/obj-x86_64-linux-gnu/kdeui/kwindowsystem.moc:127
#19 0x00007fdac675cffb in KWindowSystemPrivate::removeClient (this=0xffa820, w=39848460) at /build/buildd/kde4libs-4.2.95/kdeui/windowmanagement/kwindowsystem_x11.cpp:249
#20 0x00007fdac676bfe1 in NETRootInfo::update (this=0xffa848, dirty_props=<value optimized out>) at /build/buildd/kde4libs-4.2.95/kdeui/windowmanagement/netwm.cpp:2135
#21 0x00007fdac676c36b in NETRootInfo::event (this=0xffa848, event=<value optimized out>, properties=0x7fffd04742f0, properties_size=5)
    at /build/buildd/kde4libs-4.2.95/kdeui/windowmanagement/netwm.cpp:2058
#22 0x00007fdac675d2cb in KWindowSystemPrivate::x11Event (this=0xffa820, ev=0x7fffd0474ce0) at /build/buildd/kde4libs-4.2.95/kdeui/windowmanagement/kwindowsystem_x11.cpp:136
#23 0x00007fdac662ca43 in KApplication::x11EventFilter (this=<value optimized out>, _event=0x7fffd0474ce0) at /build/buildd/kde4libs-4.2.95/kdeui/kernel/kapplication.cpp:911
#24 0x00007fdabcb95b57 in ?? () from /usr/lib/libkdeinit4_plasma-desktop.so
#25 0x00007fdac5546b1f in qt_x11EventFilter (ev=0x7fffd0474ce0) at kernel/qapplication_x11.cpp:375
#26 0x00007fdac5559faf in QApplication::x11ProcessEvent (this=0xbac440, event=0x7fffd0474ce0) at kernel/qapplication_x11.cpp:3273
#27 0x00007fdac5583464 in x11EventSourceDispatch (s=0xbba0b0, callback=0, user_data=0x0) at kernel/qguieventdispatcher_glib.cpp:146
#28 0x00007fdac3f4820a in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#29 0x00007fdac3f4b8e0 in ?? () from /usr/lib/libglib-2.0.so.0
#30 0x00007fdac3f4ba7c in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#31 0x00007fdac7f89e6f in QEventDispatcherGlib::processEvents (this=0xbb57a0, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:323
#32 0x00007fdac5582bef in QGuiEventDispatcherGlib::processEvents (this=0x0, flags=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:202
#33 0x00007fdac7f5f002 in QEventLoop::processEvents (this=<value optimized out>, flags={i = -800632880}) at kernel/qeventloop.cpp:149
#34 0x00007fdac7f5f3cd in QEventLoop::exec (this=0x7fffd0475010, flags={i = -800632800}) at kernel/qeventloop.cpp:200
#35 0x00007fdac7f61694 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:880
#36 0x00007fdabcb8263b in kdemain () from /usr/lib/libkdeinit4_plasma-desktop.so
#37 0x000000000040714e in launch (argc=1, _name=0xb90f48 "/usr/bin/plasma-desktop", args=<value optimized out>, cwd=0x0, envc=0, envs=0xb90f68 "", 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=0x7fffd0475ea8, envp=0x7fffd0475ec0) at /build/buildd/kde4libs-4.2.95/kinit/kinit.cpp:1784

This bug may be a duplicate of or related to bug 193603

Reported using DrKonqi