Bug#808368: iceweasel: crashes after opening a specific site

[Bob Bib]

Package: iceweasel
Version: 38.5.0esr-1~deb8u2
Severity: important

Dear Maintainer,

Iceweasel crashed when I tried to load the following URL:
http://www.chinapostaltracking.com/ems/ebay-epacket-eub/

After disabling the addons & plugins, it still crashes when I try to 
open that site,
not every time, but quite often.

It can crash in both standard and private browsing modes.

GDB log attached.

-- 
Best wishes,
Bob

-- Package-specific info:

-- Extensions information
Name: Default theme
Location: 
/usr/lib/iceweasel/browser/extensions/{972ce4c6-7e08-4474-a285-3208198ce6fd}
Package: iceweasel
Status: enabled

-- Plugins information
Name: IcedTea-Web Plugin (using IcedTea-Web 1.5.2 (1.5.2-1.1))
Location: /usr/lib/jvm/java-7-openjdk-amd64/jre/lib/amd64/IcedTeaPlugin.so
Package: icedtea-7-plugin:amd64
Status: disabled

Name: Shockwave Flash (11.2.202.548)
Location: /usr/lib/flashplugin-nonfree/libflashplayer.so
Status: disabled


-- Addons package information
ii  icedtea-7-plug 1.5.2-1.1    amd64        web browser plugin based on 
OpenJ
ii  iceweasel      38.5.0esr-1~ amd64        Web browser based on Firefox

-- System Information:
Debian Release: stretch/sid
   APT prefers testing
   APT policy: (500, 'testing')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 4.2.0-1-amd64 (SMP w/2 CPU cores)
Locale: LANG=en_GB.UTF-8, LC_CTYPE=en_GB.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

Versions of packages iceweasel depends on:
ii  debianutils               4.5.1
ii  fontconfig                2.11.0-6.3
ii  libasound2                1.0.29-1
ii  libatk1.0-0               2.18.0-1
ii  libc6                     2.19-22
ii  libcairo2                 1.14.4-1
ii  libdbus-1-3               1.10.4-1
ii  libdbus-glib-1-2          0.102-1
ii  libevent-2.0-5            2.0.21-stable-2+b1
ii  libffi6                   3.2.1-3
ii  libfontconfig1            2.11.0-6.3
ii  libfreetype6              2.6.1-0.1
ii  libgcc1                   1:5.2.1-23
ii  libgdk-pixbuf2.0-0        2.32.2-1
ii  libglib2.0-0              2.46.2-1
ii  libgtk2.0-0               2.24.28-1
ii  libhunspell-1.3-0         1.3.3-3+b2
ii  libpango-1.0-0            1.38.1-1
ii  libsqlite3-0              3.9.2-1
ii  libstartup-notification0  0.12-4
ii  libstdc++6                5.2.1-23
ii  libx11-6                  2:1.6.3-1
ii  libxcomposite1            1:0.4.4-1
ii  libxdamage1               1:1.1.4-2+b1
ii  libxext6                  2:1.3.3-1
ii  libxfixes3                1:5.0.1-2+b2
ii  libxrender1               1:0.9.9-2
ii  libxt6                    1:1.1.5-1
ii  procps                    2:3.3.10-2
ii  zlib1g                    1:1.2.8.dfsg-2+b1

Versions of packages iceweasel recommends:
ii  gstreamer1.0-libav         1.6.1-1
ii  gstreamer1.0-plugins-good  1.6.1-1

Versions of packages iceweasel suggests:
ii  fonts-mathjax          2.5.3-1
ii  fonts-oflb-asana-math  000.907-6
ii  fonts-stix [otf-stix]  1.1.1-4
ii  libcanberra0           0.30-2.1
ii  libgnomeui-0           2.24.5-3
ii  libgssapi-krb5-2       1.13.2+dfsg-4
pn  mozplugger             <none>

-- no debconf information

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