Bug#510833: metacity: crashes when dragging windows between screens

[Tomaz Solc]

Package: metacity
Version: 1:2.22.0-2
Severity: normal


Hi

When dragging windows between screens on my dual-monitor 
setup Metacity sometimes crashes with a failed assertion:

**
** metacity:ERROR:(core/boxes.c:1128):meta_rectangle_edge_aligns: code should not be reached

This doesn't happen each time, but is 100% reproducable
by dragging for example a GNOME Terminal window 
across the screen border a couple of times.

Machine is a T61 Thinkpad using the internal LCD panel and an
external monitor. 

xserver-xorg 1:7.3+18, nvidia binary drivers 173.14.09-5
(using TwinView).

Metacity compositing is enabled.

Thanks
Tomaz

-- System Information:
Debian Release: 5.0
  APT prefers testing
  APT policy: (990, 'testing'), (600, 'unstable')
Architecture: i386 (i686)

Kernel: Linux 2.6.24-1-686 (SMP w/2 CPU cores)
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 metacity depends on:
ii  libatk1.0-0                   1.22.0-1   The ATK accessibility toolkit
ii  libc6                         2.7-16     GNU C Library: Shared libraries
ii  libcairo2                     1.6.4-7    The Cairo 2D vector graphics libra
ii  libgconf2-4                   2.22.0-1   GNOME configuration database syste
ii  libglib2.0-0                  2.16.6-1   The GLib library of C routines
ii  libgtk2.0-0                   2.12.11-4  The GTK+ graphical user interface 
ii  libice6                       2:1.0.4-1  X11 Inter-Client Exchange library
ii  libmetacity0                  1:2.22.0-2 library of lightweight GTK2 based 
ii  libpango1.0-0                 1.20.5-3   Layout and rendering of internatio
ii  libsm6                        2:1.0.3-2  X11 Session Management library
ii  libstartup-notification0      0.9-1      library for program launch feedbac
ii  libx11-6                      2:1.1.5-2  X11 client-side library
ii  libxcomposite1                1:0.4.0-3  X11 Composite extension library
ii  libxcursor1                   1:1.1.9-1  X cursor management 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  libxinerama1                  2:1.0.3-2  X11 Xinerama extension library
ii  libxrandr2                    2:1.2.3-1  X11 RandR extension library
ii  libxrender1                   1:0.9.4-2  X Rendering Extension client libra
ii  metacity-common               1:2.22.0-2 Shared files of lightweight GTK2 b

Versions of packages metacity recommends:
ii  gnome-session [x-session-mana 2.22.3-2   The GNOME 2 Session Manager

Versions of packages metacity suggests:
ii  gnome-control-center        1:2.22.2.1-2 utilities to configure the GNOME d

-- no debconf information