Bug#702846: libapt-pkg4.12: With i386 as second arch on an amd64 machine, amd64 DVD reports error during apt-get update (for i386 branches)

[Daniel Dickinson <debian@cshore.neomailbox.net>]

Package: libapt-pkg4.12
Version: 0.9.7.7
Severity: normal

Take and amd64 machine installed from amd64 rc1 DVD-1
dpkg --add-architecture i386
apt-get update

Note that update reports errors on the DVD for the i386 branch (which doesn't exist) of the cdrom.

-- System Information:
Debian Release: 7.0
  APT prefers testing
  APT policy: (990, 'testing')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 3.2.0-4-amd64 (SMP w/4 CPU cores)
Locale: LANG=en_CA.UTF-8, LC_CTYPE=en_CA.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash

Versions of packages libapt-pkg4.12 depends on:
ii  libbz2-1.0         1.0.6-4
ii  libc6              2.13-38
ii  libgcc1            1:4.7.2-5
ii  libstdc++6         4.7.2-5
ii  multiarch-support  2.13-38
ii  zlib1g             1:1.2.7.dfsg-13

libapt-pkg4.12 recommends no packages.

libapt-pkg4.12 suggests no packages.

-- no debconf information