Application that crashed: plasma-desktop
Version of the application: 0.3
KDE Version: 4.2.96 (KDE 4.2.96 (KDE 4.3 RC2))
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:
Upon reboot after getting updates plasma won't restart.

 -- Backtrace:
Application: Plasma Workspace (kdeinit4), signal: Segmentation fault
[Current thread is 0 (LWP 5784)]

Thread 2 (Thread 0x7f15cd8da950 (LWP 5787)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:261
#1  0x00007f15efdb5939 in QWaitCondition::wait (this=0x1bb6100, mutex=0x1bb60f8, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:87
#2  0x00007f15eec314cc in QHostInfoAgent::run (this=0x1bb60e0) at kernel/qhostinfo.cpp:260
#3  0x00007f15efdb4952 in QThreadPrivate::start (arg=0x1bb60e0) at thread/qthread_unix.cpp:189
#4  0x00007f15ebc353ba in start_thread (arg=<value optimized out>) at pthread_create.c:297
#5  0x00007f15ec819fcd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#6  0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7f15f0379750 (LWP 5784)):
[KCrash Handler]
#5  QString::operator= (this=0x1593b60, other=@0x2960d78) at ../../include/QtCore/../../src/corelib/arch/qatomic_x86_64.h:121
#6  0x00007f15cee39ab8 in ?? () from /usr/lib/kde4/plasma_applet_worldclock.so
#7  0x00007f15e776c659 in Plasma::Corona::loadLayout (this=0x11d11f0, configName=<value optimized out>) at /build/buildd/kde4libs-4.2.96/plasma/corona.cpp:377
#8  0x00007f15e776dfa2 in Plasma::Corona::initializeLayout (this=0x11d11f0, configName=@0x7ffff83b1330) at /build/buildd/kde4libs-4.2.96/plasma/corona.cpp:324
#9  0x00007f15e3c81bfd in PlasmaApp::corona (this=0x1074fc0) at /build/buildd/kdebase-workspace-4.2.96/plasma/shells/desktop/plasmaapp.cpp:574
#10 0x00007f15e3c81d88 in PlasmaApp::setupDesktop (this=0x1074fc0) at /build/buildd/kdebase-workspace-4.2.96/plasma/shells/desktop/plasmaapp.cpp:252
#11 0x00007f15e3c85db5 in PlasmaApp::qt_metacall (this=0x1074fc0, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x7ffff83b15d0)
    at /build/buildd/kdebase-workspace-4.2.96/obj-x86_64-linux-gnu/plasma/shells/desktop/plasmaapp.moc:115
#12 0x00007f15efeb31f2 in QMetaObject::activate (sender=0x11514e0, from_signal_index=<value optimized out>, to_signal_index=4, argv=0x0) at kernel/qobject.cpp:3069
#13 0x00007f15efeb852f in QSingleShotTimer::timerEvent (this=0x11514e0) at kernel/qtimer.cpp:298
#14 0x00007f15efead4d3 in QObject::event (this=0x11514e0, e=0x2960d78) at kernel/qobject.cpp:1082
#15 0x00007f15ed42678d in QApplicationPrivate::notify_helper (this=0x10b5f70, receiver=0x11514e0, e=0x7ffff83b1c90) at kernel/qapplication.cpp:4084
#16 0x00007f15ed42e97a in QApplication::notify (this=0x1074fc0, receiver=0x11514e0, e=0x7ffff83b1c90) at kernel/qapplication.cpp:4049
#17 0x00007f15ee56963b in KApplication::notify (this=0x1074fc0, receiver=0x11514e0, event=0x7ffff83b1c90) at /build/buildd/kde4libs-4.2.96/kdeui/kernel/kapplication.cpp:302
#18 0x00007f15efe9d75c in QCoreApplication::notifyInternal (this=0x1074fc0, receiver=0x11514e0, event=0x7ffff83b1c90) at kernel/qcoreapplication.cpp:602
#19 0x00007f15efeca7f6 in QTimerInfoList::activateTimers (this=0x10b9800) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:213
#20 0x00007f15efec6f0d in timerSourceDispatch (source=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:164
#21 0x00007f15ebe8420a in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#22 0x00007f15ebe878e0 in ?? () from /usr/lib/libglib-2.0.so.0
#23 0x00007f15ebe87a7c in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#24 0x00007f15efec6e6f in QEventDispatcherGlib::processEvents (this=0x10b5860, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:323
#25 0x00007f15ed4bebef in QGuiEventDispatcherGlib::processEvents (this=0x1593b60, flags=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:202
#26 0x00007f15efe9c002 in QEventLoop::processEvents (this=<value optimized out>, flags={i = -130343168}) at kernel/qeventloop.cpp:149
#27 0x00007f15efe9c3cd in QEventLoop::exec (this=0x7ffff83b1f40, flags={i = -130343088}) at kernel/qeventloop.cpp:200
#28 0x00007f15efe9e694 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:880
#29 0x00007f15e3c6c6bb in kdemain (argc=1, argv=0x10675b0) at /build/buildd/kdebase-workspace-4.2.96/plasma/shells/desktop/main.cpp:50
#30 0x0000000000407215 in launch (argc=1, _name=0x1069d28 "/usr/bin/plasma-desktop", args=<value optimized out>, cwd=0x0, envc=0, envs=0x1069d48 "", reset_env=false, tty=0x0, avoid_loops=false, 
    startup_id_str=0x40a3c9 "0") at /build/buildd/kde4libs-4.2.96/kinit/kinit.cpp:676
#31 0x0000000000407a38 in handle_launcher_request (sock=7, who=<value optimized out>) at /build/buildd/kde4libs-4.2.96/kinit/kinit.cpp:1168
#32 0x0000000000407fe5 in handle_requests (waitForPid=0) at /build/buildd/kde4libs-4.2.96/kinit/kinit.cpp:1361
#33 0x0000000000408b26 in main (argc=2, argv=0x7ffff83b2de8, envp=0x7ffff83b2e00) at /build/buildd/kde4libs-4.2.96/kinit/kinit.cpp:1788

Reported using DrKonqi