[Bug 57782] closing a window causes kwin to sigsegv

[Andrew Ash]

Public bug reported:

Binary package hint: kwin

Whenever I close a window with the top-right X, click close on a crash handler box, use location->quit on konqueror, or many other things, kwin crashes.  The KDE Crash Handler catches it, and provides me with a backtrace.  I'm using KDE 3.5.4 and am running XGL with this line in /etc/kde3/kdm/kdmrc: 
ServerCmd=/usr/bin/Xgl :0 -fullscreen -ac -accel glx:pbuffer -accel xv:fbo

Here is my Xorg version:
$ Xorg -version

X Window System Version 7.0.0
Release Date: 21 December 2005
X Protocol Version 11, Revision 0, Release 7.0
Build Operating System:Linux 2.6.15.7 i686
Current Operating System: Linux Dell8400Kubuntu 2.6.15-26-686 #1 SMP PREEMPT Thu Aug 3 03:13:28 UTC 2006 i686
Build Date: 16 March 2006
        Before reporting problems, check http://wiki.x.org
        to make sure that you have the latest version.
Module Loader present
$
==============================
And here is the result of the backtrace:
(no debugging symbols found)
Using host libthread_db library "/lib/tls/i686/cmov/libthread_db.so.1".
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
[Thread debugging using libthread_db enabled]
[New Thread -1208179008 (LWP 9962)]
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
[KCrash handler]
#6  0x4103cbdf in KWinInternal::Client::screen ()
   from /usr/lib/libkdeinit_kwin.so
#7  0x41077dce in KWinInternal::Workspace::activateNextClient ()
   from /usr/lib/libkdeinit_kwin.so
#8  0x410860be in KWinInternal::Workspace::workspaceEvent ()
   from /usr/lib/libkdeinit_kwin.so
#9  0x41086114 in KWinInternal::Application::x11EventFilter ()
   from /usr/lib/libkdeinit_kwin.so
#10 0x434e29f7 in qt_set_x11_event_filter () from /usr/lib/libqt-mt.so.3
#11 0x434efcec in QApplication::x11ProcessEvent () from /usr/lib/libqt-mt.so.3
#12 0x43509a7b in QEventLoop::processEvents () from /usr/lib/libqt-mt.so.3
#13 0x4357dee7 in QEventLoop::enterLoop () from /usr/lib/libqt-mt.so.3
#14 0x4357de0a in QEventLoop::exec () from /usr/lib/libqt-mt.so.3
#15 0x43563f05 in QApplication::exec () from /usr/lib/libqt-mt.so.3
#16 0x41087a63 in kdemain () from /usr/lib/libkdeinit_kwin.so
#17 0x42dceea2 in __libc_start_main () from /lib/tls/i686/cmov/libc.so.6
#18 0x080483b1 in ?? ()
====================================

By running kwin --replace, I can get back to functioning status again,
until I close another window.  Hopefully this problem can be resolved
soon.  At least it's giving me a push to start testing out edgy!

** Affects: kdebase (Ubuntu)
     Importance: Untriaged
         Status: Unconfirmed

-- 
closing a window causes kwin to sigsegv
https://launchpad.net/bugs/57782