Bug#471642: libpango1.0-0: iceweasel is crashing permanently with pango enabled

[Norbert Preining]

Package: libpango1.0-0
Version: 1.20.0-1
Severity: important

I'm seeing permanent crashes of iceweasel recently, and disabling pango
with
	MOZ_DISABLE_PANGO=1 iceweasel 
stops that completely, so I am filing a bug against pango.

It could be related to cairo. I got the following stderr output on a crash:
  firefox-bin: /home/dajobe/dev/debian/cairo/cairo-1.4.14/src/cairo-ft-font.c:574: _cairo_ft_unscaled_font_unlock_face: Assertion `unscaled->lock_count > 0' failed.

All the best 

Norbert

-- System Information:
Debian Release: lenny/sid
  APT prefers unstable
  APT policy: (500, 'unstable')
Architecture: i386 (i686)

Kernel: Linux 2.6.25-rc6 (SMP w/2 CPU cores; PREEMPT)
Locale: LANG=en_US.ISO-8859-15, LC_CTYPE=en_US.ISO-8859-15 (charmap=ISO-8859-15)
Shell: /bin/sh linked to /bin/bash

Versions of packages libpango1.0-0 depends on:
ii  libc6                  2.7-9             GNU C Library: Shared libraries
ii  libcairo2              1.4.14-1          The Cairo 2D vector graphics libra
ii  libdatrie0             0.1.3-1           Double-array trie library
ii  libfontconfig1         2.5.0-2           generic font configuration library
ii  libfreetype6           2.3.5-1+b1        FreeType 2 font engine, shared lib
ii  libglib2.0-0           2.16.1-2          The GLib library of C routines
ii  libpango1.0-common     1.20.0-1          Modules and configuration files fo
ii  libthai0               0.1.9-3           Thai language support library
ii  libx11-6               2:1.0.3-7         X11 client-side library
ii  libxft2                2.1.12-2          FreeType-based font drawing librar
ii  libxrender1            1:0.9.4-1         X Rendering Extension client libra
ii  zlib1g                 1:1.2.3.3.dfsg-11 compression library - runtime

libpango1.0-0 recommends no packages.

-- no debconf information