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Bug#483625: /usr/bin/kwin: logging out causes a kwin crash

Package: kde-window-manager
Version: 4:4.0.80-2
Severity: normal
File: /usr/bin/kwin

Everytime I log out of KDE4, kwin crashes. After closing the backtrace
window logout proceeds normally.

I am attaching the backtrace of the crash.

-- System Information:
Debian Release: lenny/sid
  APT prefers testing
  APT policy: (900, 'testing'), (400, 'unstable'), (1, 'experimental')
Architecture: i386 (i686)

Kernel: Linux 2.6.24-1-686 (SMP w/1 CPU core)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/bash

Versions of packages kde-window-manager depends on:
ii  kdebase-runtime           4:4.0.80-2     runtime components from the offici
ii  kdelibs5                  4:4.0.80-1     core libraries for all KDE 4 appli
ii  libc6                     2.7-10         GNU C Library: Shared libraries
ii  libcaptury0               0.3.0~svn158-1 X11/GLX video capturing framework 
ii  libgl1-mesa-glx [libgl1]  7.0.3-1        A free implementation of the OpenG
ii  libice6                   2:1.0.4-1      X11 Inter-Client Exchange library
ii  libkdecorations4          4:4.0.80-2     library used by decorations for th
ii  libkwineffects1           4:4.0.80-2     library used by effects for the KD
ii  libqt4-dbus               4.4.0-2        Qt 4 D-Bus module
ii  libqt4-qt3support         4.4.0-2        Qt 3 compatibility library for Qt 
ii  libqtcore4                4.4.0-2        Qt 4 core module
ii  libqtgui4                 4.4.0-2        Qt 4 GUI module
ii  libsm6                    2:1.0.3-1+b1   X11 Session Management library
ii  libstdc++6                4.3.0-5        The GNU Standard C++ Library v3
ii  libx11-6                  2:1.1.4-1      X11 client-side library
ii  libxcomposite1            1:0.4.0-2      X11 Composite extension library
ii  libxdamage1               1:1.1.1-4      X11 damaged region extension libra
ii  libxext6                  2:1.0.4-1      X11 miscellaneous extension librar
ii  libxfixes3                1:4.0.3-2      X11 miscellaneous 'fixes' extensio
ii  libxrandr2                2:1.2.2-2      X11 RandR extension library
ii  libxrender1               1:0.9.4-1      X Rendering Extension client libra

kde-window-manager recommends no packages.

-- no debconf information
Application: KWin (kwin), signal SIGABRT
Using host libthread_db library "/lib/i686/cmov/libthread_db.so.1".
[Thread debugging using libthread_db enabled]
[New Thread 0xb650f720 (LWP 1888)]
[KCrash handler]
#6  0xffffe410 in __kernel_vsyscall ()
#7  0xb7d82ef5 in raise () from /lib/i686/cmov/libc.so.6
#8  0xb7d84871 in abort () from /lib/i686/cmov/libc.so.6
#9  0xb7d7c0ee in __assert_fail () from /lib/i686/cmov/libc.so.6
#10 0xb65f2877 in xcb_xlib_lock () from /usr/lib/libxcb-xlib.so.0
#11 0xb6bbc028 in _XCBLockDisplay (dpy=0x805e790) at ../../src/xcb_lock.c:21
#12 0xb6af8ce1 in XRenderFreePicture (dpy=0x805d3c0, picture=23070677)
    at ../../src/Picture.c:236
#13 0xb76396d7 in QX11PixmapData::release (this=0x8152e98)
    at image/qpixmap_x11.cpp:1181
#14 0xb7639b0d in ~QX11PixmapData (this=0x8152e98)
    at image/qpixmap_x11.cpp:1160
#15 0xb762f86b in QPixmap::deref (this=0xb7f54280) at image/qpixmap.cpp:1260
#16 0xb76300a0 in ~QPixmap (this=0xb7f54280) at image/qpixmap.cpp:321
#17 0xb7eca7e0 in __tcf_0 ()
    at /tmp/buildd/kdebase-workspace-4.0.80/kwin/client.cpp:1749
#18 0xb7d85ef4 in exit () from /lib/i686/cmov/libc.so.6
#19 0xb6bb51b4 in _XDefaultError (dpy=0x805d3c0, event=0xbf96cfac)
    at ../../src/XlibInt.c:2853
#20 0xb6bb5293 in _XError (dpy=0x805d3c0, rep=0x810bb60)
    at ../../src/XlibInt.c:2905
#21 0xb6bbc93c in process_responses (dpy=0x805d3c0, wait_for_first_event=0, 
    current_error=0xbf96d0a8, current_request=11522715)
    at ../../src/xcb_io.c:138
#22 0xb6bbccfa in _XReply (dpy=0x805d3c0, rep=0xbf96d0d0, extra=0, discard=1)
    at ../../src/xcb_io.c:370
#23 0xb6bb0eea in XSync (dpy=0x805d3c0, discard=1) at ../../src/Sync.c:48
#24 0xb6b91fde in XCloseDisplay (dpy=0x805d3c0) at ../../src/ClDisplay.c:67
#25 0xb75d5daa in qt_cleanup () at kernel/qapplication_x11.cpp:2325
#26 0xb75775c9 in ~QApplication (this=0xbf96d2b4)
    at kernel/qapplication.cpp:1020
#27 0xb6e5ba3a in ~KApplication (this=0xbf96d2b4)
    at /tmp/buildd/kde4libs-4.0.80/kdeui/kernel/kapplication.cpp:946
#28 0xb7edb640 in ~Application (this=0xbf96d2b4)
    at /tmp/buildd/kdebase-workspace-4.0.80/kwin/main.cpp:346
#29 0xb7ede95b in kdemain (argc=3, argv=0xbf96d484)
    at /tmp/buildd/kdebase-workspace-4.0.80/kwin/main.cpp:510
#30 0x08048552 in main (argc=)
    at /tmp/buildd/kdebase-workspace-4.0.80/obj-i486-linux-gnu/kwin/kwin_dummy.cpp:3
#31 0xb7d6e450 in __libc_start_main () from /lib/i686/cmov/libc.so.6
#32 0x080484c1 in _start ()
#0  0xffffe410 in __kernel_vsyscall ()

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