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 2.6.28-11-generic x86_64
Distribution: Ubuntu 9.04

What I was doing when the application crashed:
The crash happened during the following sequence:

1) open desktop settings
2) change type from desktop to folder view
3) apply changes
4) change type from folder view to desktop
5) apply changes

I cannot reproduce the crash with this sequence

 -- Backtrace:
Application: Plasma Workspace (kdeinit4), signal: Segmentation fault
[Current thread is 0 (LWP 29769)]

Thread 2 (Thread 0x7f7c17444950 (LWP 29770)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:261
#1  0x00007f7c39f38939 in QWaitCondition::wait (this=0x15aaba0, mutex=0x15aab98, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:87
#2  0x00007f7c38db54cc in QHostInfoAgent::run (this=0x15aab80) at kernel/qhostinfo.cpp:260
#3  0x00007f7c39f37952 in QThreadPrivate::start (arg=0x15aab80) at thread/qthread_unix.cpp:189
#4  0x00007f7c35db93ba in start_thread (arg=<value optimized out>) at pthread_create.c:297
#5  0x00007f7c3699dfcd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#6  0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7f7c3a4fd750 (LWP 29769)):
[KCrash Handler]
#5  QGraphicsScene::addItem (this=0xae7e10, item=0x1db9560) at graphicsview/qgraphicsscene.cpp:2792
#6  0x00007f7c318f478c in Plasma::CoronaPrivate::addContainment (this=0xae7e40, name=@0x7fff42533530, args=<value optimized out>, id=0, delayedInit=false)
    at /build/buildd/kde4libs-4.2.95/plasma/corona.cpp:214
#7  0x00007f7c31955591 in Plasma::View::swapContainment (this=0x188c1a0, existing=0x16171d0, name=@0x7fff42533530, args=@0x7fff42533510) at /build/buildd/kde4libs-4.2.95/plasma/view.cpp:300
#8  0x00007f7c2ebde2b0 in ?? () from /usr/lib/libkdeinit4_plasma-desktop.so
#9  0x00007f7c2ebdbc58 in ?? () from /usr/lib/libkdeinit4_plasma-desktop.so
#10 0x00007f7c3a0361f2 in QMetaObject::activate (sender=0x1ffe070, from_signal_index=<value optimized out>, to_signal_index=43, argv=0x0) at kernel/qobject.cpp:3069
#11 0x00007f7c38660e85 in KDialog::slotButtonClicked (this=0x1ffe070, button=8) at /build/buildd/kde4libs-4.2.95/kdeui/dialogs/kdialog.cpp:858
#12 0x00007f7c3866309d in KDialog::qt_metacall (this=0x1ffe070, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x7fff42533890)
    at /build/buildd/kde4libs-4.2.95/obj-x86_64-linux-gnu/kdeui/kdialog.moc:184
#13 0x00007f7c38719006 in KPageDialog::qt_metacall (this=0x1db9560, _c=31167824, _id=48567040, _a=0x0) at /build/buildd/kde4libs-4.2.95/obj-x86_64-linux-gnu/kdeui/kpagedialog.moc:64
#14 0x00007f7c3864fd25 in KConfigDialog::qt_metacall (this=0x1db9560, _c=31167824, _id=48567040, _a=0x0) at /build/buildd/kde4libs-4.2.95/obj-x86_64-linux-gnu/kdeui/kconfigdialog.moc:78
#15 0x00007f7c2ebdbb95 in ?? () from /usr/lib/libkdeinit4_plasma-desktop.so
#16 0x00007f7c3a0361f2 in QMetaObject::activate (sender=0x15cc958, from_signal_index=<value optimized out>, to_signal_index=4, argv=0x0) at kernel/qobject.cpp:3069
#17 0x00007f7c3a03901e in QSignalMapper::mapped (this=0x1db9560, _t1=8) at .moc/release-shared/moc_qsignalmapper.cpp:95
#18 0x00007f7c3a0398c0 in QSignalMapper::map (this=0x15cc958, sender=0x31398a0) at kernel/qsignalmapper.cpp:266
#19 0x00007f7c3a03a4b0 in QSignalMapper::qt_metacall (this=0x15cc958, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x7fff42533a10) at .moc/release-shared/moc_qsignalmapper.cpp:81
#20 0x00007f7c3a0361f2 in QMetaObject::activate (sender=0x31398a0, from_signal_index=<value optimized out>, to_signal_index=30, argv=0x0) at kernel/qobject.cpp:3069
#21 0x00007f7c37bef267 in QAbstractButton::clicked (this=0x1db9560, _t1=false) at .moc/release-shared/moc_qabstractbutton.cpp:200
#22 0x00007f7c3794cdeb in QAbstractButtonPrivate::emitClicked (this=0x2c39560) at widgets/qabstractbutton.cpp:543
#23 0x00007f7c3794ea52 in QAbstractButtonPrivate::click (this=0x2c39560) at widgets/qabstractbutton.cpp:536
#24 0x00007f7c3794eca5 in QAbstractButton::mouseReleaseEvent (this=0x31398a0, e=0x7fff425341e0) at widgets/qabstractbutton.cpp:1115
#25 0x00007f7c375fb8cf in QWidget::event (this=0x31398a0, event=0x7fff425341e0) at kernel/qwidget.cpp:7516
#26 0x00007f7c375aa78d in QApplicationPrivate::notify_helper (this=0xa68340, receiver=0x31398a0, e=0x7fff425341e0) at kernel/qapplication.cpp:4084
#27 0x00007f7c375b30da in QApplication::notify (this=<value optimized out>, receiver=0x31398a0, e=0x7fff425341e0) at kernel/qapplication.cpp:3786
#28 0x00007f7c386ed62b in KApplication::notify (this=0xa28e20, receiver=0x31398a0, event=0x7fff425341e0) at /build/buildd/kde4libs-4.2.95/kdeui/kernel/kapplication.cpp:302
#29 0x00007f7c3a02075c in QCoreApplication::notifyInternal (this=0xa28e20, receiver=0x31398a0, event=0x7fff425341e0) at kernel/qcoreapplication.cpp:602
#30 0x00007f7c375b2328 in QApplicationPrivate::sendMouseEvent (receiver=0x31398a0, event=0x7fff425341e0, alienWidget=0x31398a0, nativeWidget=0x1ffe070, buttonDown=<value optimized out>, 
    lastMouseReceiver=@0x7f7c3800eeb0) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:216
#31 0x00007f7c3761be19 in QETWidget::translateMouseEvent (this=0x1ffe070, event=<value optimized out>) at kernel/qapplication_x11.cpp:4425
#32 0x00007f7c3761aa88 in QApplication::x11ProcessEvent (this=0xa28e20, event=0x7fff42534d20) at kernel/qapplication_x11.cpp:3543
#33 0x00007f7c37643464 in x11EventSourceDispatch (s=0xa6bb40, callback=0, user_data=0x0) at kernel/qguieventdispatcher_glib.cpp:146
#34 0x00007f7c3600820a in IA__g_main_context_dispatch (context=0xa6ad20) at /build/buildd/glib2.0-2.20.1/glib/gmain.c:1814
#35 0x00007f7c3600b8e0 in g_main_context_iterate (context=0xa6ad20, block=1, dispatch=1, self=<value optimized out>) at /build/buildd/glib2.0-2.20.1/glib/gmain.c:2448
#36 0x00007f7c3600ba7c in IA__g_main_context_iteration (context=0xa6ad20, may_block=1) at /build/buildd/glib2.0-2.20.1/glib/gmain.c:2511
#37 0x00007f7c3a049e6f in QEventDispatcherGlib::processEvents (this=0xa67fe0, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:323
#38 0x00007f7c37642bef in QGuiEventDispatcherGlib::processEvents (this=0x1db9560, flags=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:202
#39 0x00007f7c3a01f002 in QEventLoop::processEvents (this=<value optimized out>, flags={i = 1112756240}) at kernel/qeventloop.cpp:149
#40 0x00007f7c3a01f3cd in QEventLoop::exec (this=0x7fff42535050, flags={i = 1112756320}) at kernel/qeventloop.cpp:200
#41 0x00007f7c3a021694 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:880
#42 0x00007f7c2ebeb63b in kdemain () from /usr/lib/libkdeinit4_plasma-desktop.so
#43 0x000000000040714e in launch (argc=1, _name=0xa1b188 "/usr/bin/plasma-desktop", args=<value optimized out>, cwd=0x0, envc=0, envs=0xa1b1a8 "", reset_env=false, tty=0x0, avoid_loops=false, 
    startup_id_str=0x40a309 "0") at /build/buildd/kde4libs-4.2.95/kinit/kinit.cpp:672
#44 0x0000000000407978 in handle_launcher_request (sock=7, who=<value optimized out>) at /build/buildd/kde4libs-4.2.95/kinit/kinit.cpp:1164
#45 0x0000000000407f25 in handle_requests (waitForPid=0) at /build/buildd/kde4libs-4.2.95/kinit/kinit.cpp:1357
#46 0x0000000000408a66 in main (argc=2, argv=0x7fff42535ee8, envp=0x7fff42535f00) at /build/buildd/kde4libs-4.2.95/kinit/kinit.cpp:1784

Reported using DrKonqi