Bug#559501: On amd64, iceweasel 3.5.5 has become unuseable. Works on x86 with nearly same install

[Eric Valette]

Package: iceweasel
Version: 3.5.5-1
Severity: important

Null pointer deref has shwon below. I cannot browse more than 40s before I trigger the bug whatever the pages are.

iceweasel -g
GNU gdb (GDB) 7.0-debian
Copyright (C) 2009 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "x86_64-linux-gnu".
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>...
Reading symbols from /usr/lib/iceweasel/firefox-bin...(no debugging symbols found)...done.
(gdb) run
Starting program: /usr/lib/iceweasel/firefox-bin
[Thread debugging using libthread_db enabled]

(firefox-bin:29275): GLib-WARNING **: g_set_prgname() called multiple times
[New Thread 0x7fffe69f2910 (LWP 29279)]
[New Thread 0x7fffe61f1910 (LWP 29280)]
[New Thread 0x7fffe53fd910 (LWP 29281)]
[New Thread 0x7fffe41ff910 (LWP 29282)]
[New Thread 0x7fffe31fa910 (LWP 29283)]
[Thread 0x7fffe31fa910 (LWP 29283) exited]
[New Thread 0x7fffe31fa910 (LWP 29284)]
[New Thread 0x7fffe26ff910 (LWP 29285)]
[Thread 0x7fffe26ff910 (LWP 29285) exited]
[Thread 0x7fffe31fa910 (LWP 29284) exited]
[New Thread 0x7fffe26ff910 (LWP 29286)]
[New Thread 0x7fffe31fa910 (LWP 29287)]
[New Thread 0x7fffdc8d2910 (LWP 29288)]
[New Thread 0x7fffdc0d1910 (LWP 29289)]
[New Thread 0x7fffdb6ff910 (LWP 29292)]
[Thread 0x7fffdb6ff910 (LWP 29292) exited]

Program received signal SIGSEGV, Segmentation fault.
0x00007ffff62f0c66 in PL_DHashTableOperate (table=0x7ffff6af61f0, key=0x7fffeaa5fa68, op=PL_DHASH_LOOKUP) at pldhash.c:599
599         keyHash = table->ops->hashKey(table, key);
(gdb) p table
$1 = (PLDHashTable *) 0x7ffff6af61f0
(gdb) p *table
$2 = {ops = 0x0, data = 0x0, hashShift = 19, maxAlphaFrac = 192 '\300', minAlphaFrac = 64 '@', entrySize = 40, entryCount = 3265, removedCount = 0,
  generation = 2, entryStore = 0x7fffe4605000 ""}


-- System Information:
Debian Release: squeeze/sid
  APT prefers unstable
  APT policy: (500, 'unstable'), (1, 'experimental')
Architecture: amd64 (x86_64)

Kernel: Linux 2.6.32 (SMP w/2 CPU cores; PREEMPT)
Locale: LANG=fr_FR.UTF8, LC_CTYPE=fr_FR.UTF8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/bash

Versions of packages iceweasel depends on:
ii  debianutils                   3.2.2      Miscellaneous utilities specific t
ii  fontconfig                    2.6.0-4    generic font configuration library
ii  libc6                         2.10.2-2   GNU C Library: Shared libraries
ii  libglib2.0-0                  2.23.0-1   The GLib library of C routines
ii  libgtk2.0-0                   2.19.1-1   The GTK+ graphical user interface 
ii  libnspr4-0d                   4.8.2-1    NetScape Portable Runtime Library
ii  libstdc++6                    4.4.2-3    The GNU Standard C++ Library v3
ii  procps                        1:3.2.8-2  /proc file system utilities
ii  psmisc                        22.8-1     utilities that use the proc file s
ii  xulrunner-1.9.1               1.9.1.5-2  XUL + XPCOM application runner

iceweasel recommends no packages.

Versions of packages iceweasel suggests:
ii  latex-xft-fonts               1.6.4-1    TrueType versions of some TeX font
pn  libkrb53                      <none>     (no description available)
pn  mozplugger                    <none>     (no description available)
pn  ttf-mathematica4.1            <none>     (no description available)
ii  xfonts-mathml                 3          Type1 Symbol font for MathML
pn  xprint                        <none>     (no description available)
pn  xulrunner-1.9.1-gnome-support <none>     (no description available)

-- no debconf information