Application that crashed: kded4
Version of the application: $Id: kded.cpp 1031638 2009-10-05 16:59:11Z lunakl $
KDE Version: 4.3.4 (KDE 4.3.4)
Qt Version: 4.5.3
Operating System: Linux 2.6.31.12-174.2.3.fc12.x86_64 x86_64
Distribution: "Fedora release 12 (Constantine)"

What I was doing when the application crashed:
The error occures after ending the screensaver in KDE4

 -- Backtrace:
Application: KDE-szolgáltatás (kded4), signal: Segmentation fault
[KCrash Handler]
#5  0x00000036e8c54f8c in QMutex::lock (this=0xdbb338) at thread/qmutex.cpp:152
#6  0x00000036e8d54325 in relock (sender=0xe42050, from_signal_index=<value optimized out>, to_signal_index=<value optimized out>, argv=0x7fffcf27dbc0) at ../../src/corelib/thread/qmutex.h:120
#7  QMutexLocker (sender=0xe42050, from_signal_index=<value optimized out>, to_signal_index=<value optimized out>, argv=0x7fffcf27dbc0) at ../../src/corelib/thread/qmutex.h:102
#8  QMetaObject::activate (sender=0xe42050, from_signal_index=<value optimized out>, to_signal_index=<value optimized out>, argv=0x7fffcf27dbc0) at kernel/qobject.cpp:3051
#9  0x00000036ec821faf in PackageKit::Transaction::finished(PackageKit::Transaction::ExitStatus, unsigned int) () from /usr/lib64/libpackagekit-qt.so.12
#10 0x00000036ec81de39 in PackageKit::ClientPrivate::serviceOwnerChanged(QString const&, QString const&, QString const&) () from /usr/lib64/libpackagekit-qt.so.12
#11 0x00000036ec81f288 in PackageKit::ClientPrivate::qt_metacall(QMetaObject::Call, int, void**) () from /usr/lib64/libpackagekit-qt.so.12
#12 0x00000036e8d5408c in QMetaObject::activate (sender=0xd8a230, from_signal_index=<value optimized out>, to_signal_index=<value optimized out>, argv=0x7fffcf27dda0) at kernel/qobject.cpp:3112
#13 0x00000036eaa558cf in QDBusConnectionInterface::serviceOwnerChanged (this=<value optimized out>, _t1=<value optimized out>, _t2=<value optimized out>, _t3=...)
    at .moc/release-shared/moc_qdbusconnectioninterface.cpp:204
#14 0x00000036eaa55b64 in QDBusConnectionInterface::qt_metacall (this=0xd8a230, _c=InvokeMetaMethod, _id=2, _a=0x7fffcf27e020) at .moc/release-shared/moc_qdbusconnectioninterface.cpp:131
#15 0x00000036e8d5408c in QMetaObject::activate (sender=0xd8a230, from_signal_index=<value optimized out>, to_signal_index=<value optimized out>, argv=0x7fffcf27e020) at kernel/qobject.cpp:3112
#16 0x00000036eaa557ff in QDBusConnectionInterface::NameOwnerChanged (this=<value optimized out>, _t1=<value optimized out>, _t2=<value optimized out>, _t3=...)
    at .moc/release-shared/moc_qdbusconnectioninterface.cpp:232
#17 0x00000036eaa55bcc in QDBusConnectionInterface::qt_metacall (this=0xd8a230, _c=InvokeMetaMethod, _id=6, _a=0x7fffcf27e430) at .moc/release-shared/moc_qdbusconnectioninterface.cpp:135
#18 0x00000036eaa22e84 in QDBusConnectionPrivate::deliverCall (this=<value optimized out>, object=<value optimized out>, msg=<value optimized out>, metaTypes=..., slotIdx=<value optimized out>)
    at qdbusintegrator.cpp:891
#19 0x00000036eaa2a61f in QDBusCallDeliveryEvent::placeMetaCall(QObject*) () from /usr/lib64/libQtDBus.so.4
#20 0x00000036e8d4e401 in QObject::event (this=0xd8a230, e=0xd82600) at kernel/qobject.cpp:1110
#21 0x00000036eb98f65c in QApplicationPrivate::notify_helper (this=0xc9be90, receiver=0xd8a230, e=0xd82600) at kernel/qapplication.cpp:4065
#22 0x00000036eb9968ce in QApplication::notify (this=<value optimized out>, receiver=0xd8a230, e=0xd82600) at kernel/qapplication.cpp:4030
#23 0x00000036ed211a66 in KApplication::notify(QObject*, QEvent*) () from /usr/lib64/libkdeui.so.5
#24 0x00000036e8d3ee6c in QCoreApplication::notifyInternal (this=0x7fffcf27edd0, receiver=0xd8a230, event=0xd82600) at kernel/qcoreapplication.cpp:610
#25 0x00000036e8d3fa42 in sendEvent (receiver=0x0, event_type=<value optimized out>, data=0xc71fa0) at kernel/qcoreapplication.h:213
#26 QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=<value optimized out>, data=0xc71fa0) at kernel/qcoreapplication.cpp:1247
#27 0x00000036e8d67573 in sendPostedEvents (s=<value optimized out>) at kernel/qcoreapplication.h:218
#28 postEventSourceDispatch (s=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:210
#29 0x00000036e043922e in g_main_context_dispatch () from /lib64/libglib-2.0.so.0
#30 0x00000036e043cc18 in ?? () from /lib64/libglib-2.0.so.0
#31 0x00000036e043cd3a in g_main_context_iteration () from /lib64/libglib-2.0.so.0
#32 0x00000036e8d671e6 in QEventDispatcherGlib::processEvents (this=0xc717b0, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:327
#33 0x00000036eba21ffe in QGuiEventDispatcherGlib::processEvents (this=<value optimized out>, flags=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:202
#34 0x00000036e8d3d772 in QEventLoop::processEvents (this=<value optimized out>, flags=...) at kernel/qeventloop.cpp:149
#35 0x00000036e8d3db44 in QEventLoop::exec (this=0x7fffcf27ed20, flags=...) at kernel/qeventloop.cpp:201
#36 0x00000036e8d3fcd9 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:888
#37 0x00000036e780b6eb in kdemain () from /usr/lib64/libkdeinit4_kded4.so
#38 0x00000036dd81eb1d in __libc_start_main () from /lib64/libc.so.6
#39 0x0000000000400709 in _start ()

Reported using DrKonqi