Application: kwin (4.4.5 (KDE 4.4.5))
KDE Platform Version: 4.4.5 (KDE 4.4.5)
Qt Version: 4.6.2
Operating System: Linux 2.6.32-30-generic x86_64
Distribution: Ubuntu 10.04.2 LTS

-- Information about the crash:
The shortcut rises to a foreground a (possibly open) chat window of Psi (Jabber client) with an incoming message. This time that window was in background. 

The crash can be reproduced some of the time.

 -- Backtrace:
Application: KWin (kwin), signal: Segmentation fault
[Current thread is 1 (Thread 0x7f742bc88780 (LWP 2122))]

Thread 2 (Thread 0x7f740d50c700 (LWP 2123)):
#0  0xffffffffff60017b in ?? ()
#1  0x00007f740d50ba80 in ?? ()
#2  0x00007fff115e7852 in ?? ()
Backtrace stopped: previous frame identical to this frame (corrupt stack?)

Thread 1 (Thread 0x7f742bc88780 (LWP 2122)):
[KCrash Handler]
#5  QListData::begin (this=0xffffffffffffffff, c=0x2abc000, before=-1, becomeVisible=true) at /usr/include/qt4/QtCore/qlist.h:93
#6  QList<KWin::Client*>::contains (this=0xffffffffffffffff, c=0x2abc000, before=-1, becomeVisible=true) at /usr/include/qt4/QtCore/qlist.h:757
#7  KWin::ClientGroup::contains (this=0xffffffffffffffff, c=0x2abc000, before=-1, becomeVisible=true) at ../../kwin/clientgroup.h:192
#8  KWin::ClientGroup::add (this=0xffffffffffffffff, c=0x2abc000, before=-1, becomeVisible=true) at ../../kwin/clientgroup.cpp:52
#9  0x00007f742b831eb1 in KWin::Client::manage (this=0x2abc000, w=<value optimized out>, isMapped=<value optimized out>) at ../../kwin/manage.cpp:307
#10 0x00007f742b7e6d22 in KWin::Workspace::createClient (this=0x1da9eb0, w=44937181, is_mapped=255) at ../../kwin/workspace.cpp:547
#11 0x00007f742b825fc1 in KWin::Workspace::workspaceEvent (this=0x1da9eb0, e=0x7fff114d0260) at ../../kwin/events.cpp:378
#12 0x00007f742b803268 in KWin::Application::x11EventFilter (this=0x7fff114d0650, e=0x7fff114d0260) at ../../kwin/main.cpp:361
#13 0x00007f7427b54641 in qt_x11EventFilter (ev=0x7fff114d0260) at kernel/qapplication_x11.cpp:399
#14 0x00007f7427b63191 in QApplication::x11ProcessEvent (this=<value optimized out>, event=0x7fff114d0260) at kernel/qapplication_x11.cpp:3231
#15 0x00007f7427b8f882 in x11EventSourceDispatch (s=0x1c1eb50, callback=<value optimized out>, user_data=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:146
#16 0x00007f7421b268c2 in g_main_context_dispatch () from /lib/libglib-2.0.so.0
#17 0x00007f7421b2a748 in ?? () from /lib/libglib-2.0.so.0
#18 0x00007f7421b2a8fc in g_main_context_iteration () from /lib/libglib-2.0.so.0
#19 0x00007f74273bc513 in QEventDispatcherGlib::processEvents (this=0x1c015b0, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:412
#20 0x00007f7427b8f46e in QGuiEventDispatcherGlib::processEvents (this=0xffffffffffffffff, flags=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:204
#21 0x00007f7427391992 in QEventLoop::processEvents (this=<value optimized out>, flags=) at kernel/qeventloop.cpp:149
#22 0x00007f7427391d6c in QEventLoop::exec (this=0x7fff114d0590, flags=) at kernel/qeventloop.cpp:201
#23 0x00007f7427395aab in QCoreApplication::exec () at kernel/qcoreapplication.cpp:981
#24 0x00007f742b804ace in kdemain (argc=<value optimized out>, argv=<value optimized out>) at ../../kwin/main.cpp:526
#25 0x00007f742b450c4d in __libc_start_main (main=<value optimized out>, argc=<value optimized out>, ubp_av=<value optimized out>, init=<value optimized out>, fini=<value optimized out>, 
    rtld_fini=<value optimized out>, stack_end=0x7fff114d0b58) at libc-start.c:226
#26 0x00000000004006b9 in _start ()

This bug may be a duplicate of or related to bug 229292.

Possible duplicates by query: bug 240729.

Reported using DrKonqi