Application: kded4 ($Id: kded.cpp 1031637 2009-10-05 16:58:19Z lunakl $)
KDE Platform Version: 4.4.00 (KDE 4.4.0)
Qt Version: 4.6.2
Operating System: Linux 2.6.32-14-generic x86_64
Distribution: Ubuntu lucid (development branch)

-- Information about the crash:
Always when I clik on "new updates" from tray menu widget I have this bug.
For more information about bug I did this:
aptitude install libqt4-dbg
aptitude kdelibs5-dbg

The crash can be reproduced every time.

 -- Backtrace:
Application: KDE Daemon (kdeinit4), signal: Segmentation fault
The current source language is "auto; currently asm".
[KCrash Handler]
#5  0x00007f83830b4fbe in ?? () from /usr/lib/kde4/kded_notificationhelper.so
#6  0x00007f83830b26ab in ?? () from /usr/lib/kde4/kded_notificationhelper.so
#7  0x00007f83830b2cc9 in ?? () from /usr/lib/kde4/kded_notificationhelper.so
#8  0x00007f83830b1784 in ?? () from /usr/lib/kde4/kded_notificationhelper.so
#9  0x00007f83830b20e1 in ?? () from /usr/lib/kde4/kded_notificationhelper.so
#10 0x00007f8395b3edbf in QMetaObject::activate (sender=0x15f4290, m=<value optimized out>, local_signal_index=<value optimized out>, argv=0x530055005f006e) at kernel/qobject.cpp:3293
#11 0x00007f83960a6ca5 in KNotification::activate (this=0x15f4290, action=1) at ../../kdeui/notifications/knotification.cpp:230
#12 0x00007f83960aa148 in KNotificationManager::notificationActivated (this=0x1615c30, id=12, action=1) at ../../kdeui/notifications/knotificationmanager.cpp:87
#13 0x00007f83960aa31d in KNotificationManager::qt_metacall (this=0x1615c30, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x7fff04c6d0b0) at ./knotificationmanager_p.moc:76
#14 0x00007f8393ef2486 in QDBusConnectionPrivate::deliverCall (this=<value optimized out>, object=<value optimized out>, msg=<value optimized out>, metaTypes=..., slotIdx=<value optimized out>)
    at qdbusintegrator.cpp:904
#15 0x00007f8393efd05f in QDBusCallDeliveryEvent::placeMetaCall(QObject*) () from /usr/lib/libQtDBus.so.4
#16 0x00007f8395b3bcc9 in QObject::event (this=0x1615c30, e=0x16d49d0) at kernel/qobject.cpp:1248
#17 0x00007f8394cc822c in QApplicationPrivate::notify_helper (this=0x142e370, receiver=0x1615c30, e=0x16d49d0) at kernel/qapplication.cpp:4300
#18 0x00007f8394cce6fb in QApplication::notify (this=0x7fff04c6dba0, receiver=0x1615c30, e=0x16d49d0) at kernel/qapplication.cpp:4183
#19 0x00007f83960731d6 in KApplication::notify (this=0x7fff04c6dba0, receiver=0x1615c30, event=0x16d49d0) at ../../kdeui/kernel/kapplication.cpp:302
#20 0x00007f8395b2bfdc in QCoreApplication::notifyInternal (this=0x7fff04c6dba0, receiver=0x1615c30, event=0x16d49d0) at kernel/qcoreapplication.cpp:704
#21 0x00007f8395b2e757 in QCoreApplication::sendEvent (receiver=0x0, event_type=<value optimized out>, data=0x13a8cb0) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#22 QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=<value optimized out>, data=0x13a8cb0) at kernel/qcoreapplication.cpp:1345
#23 0x00007f8395b55943 in QCoreApplication::sendPostedEvents (s=<value optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:220
#24 postEventSourceDispatch (s=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:276
#25 0x00007f8390d05df2 in g_main_context_dispatch () from /lib/libglib-2.0.so.0
#26 0x00007f8390d09c38 in ?? () from /lib/libglib-2.0.so.0
#27 0x00007f8390d09e1c in g_main_context_iteration () from /lib/libglib-2.0.so.0
#28 0x00007f8395b55483 in QEventDispatcherGlib::processEvents (this=0x13aa1c0, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:412
#29 0x00007f8394d7821e in QGuiEventDispatcherGlib::processEvents (this=0x7f83947f1e40, flags=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:204
#30 0x00007f8395b2a902 in QEventLoop::processEvents (this=<value optimized out>, flags=) at kernel/qeventloop.cpp:149
#31 0x00007f8395b2acdc in QEventLoop::exec (this=0x7fff04c6daf0, flags=) at kernel/qeventloop.cpp:201
#32 0x00007f8395b2ea1b in QCoreApplication::exec () at kernel/qcoreapplication.cpp:981
#33 0x00007f838977bd47 in kdemain (argc=<value optimized out>, argv=<value optimized out>) at ../../kded/kded.cpp:932
#34 0x0000000000406fe8 in launch (argc=1, _name=<value optimized out>, args=<value optimized out>, cwd=<value optimized out>, envc=0, envs=<value optimized out>, reset_env=false, tty=0x0, 
    avoid_loops=false, startup_id_str=0x40a4d9 "0") at ../../kinit/kinit.cpp:717
#35 0x0000000000408f4e in main (argc=<value optimized out>, argv=<value optimized out>, envp=<value optimized out>) at ../../kinit/kinit.cpp:1784

Reported using DrKonqi