Bug#743413: 'apt list' seg-faults if sources.list file is unreadable

[Ben Hutchings <ben@decadent.org.uk>]

Package: apt
Version: 1.0
Severity: normal

I accidentally gave /etc/apt/sources.list permissions 640 rather than
644.  'apt list' would then consistently seg-fault.

Ben.

-- System Information:
Debian Release: jessie/sid
  APT prefers unstable
  APT policy: (500, 'unstable'), (500, 'testing'), (500, 'stable'), (1, 'experimental')
Architecture: i386 (x86_64)
Foreign Architectures: amd64

Kernel: Linux 3.13-1-amd64 (SMP w/4 CPU cores)
Locale: LANG=en_GB.utf8, LC_CTYPE=en_GB.utf8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash

Versions of packages apt depends on:
ii  debian-archive-keyring  2012.4
ii  gnupg                   1.4.16-1.1
ii  libapt-pkg4.12          1.0
ii  libc6                   2.18-4
ii  libgcc1                 1:4.8.2-18
ii  libstdc++6              4.8.2-18

apt recommends no packages.

Versions of packages apt suggests:
pn  apt-doc     <none>
ii  aptitude    0.6.10-1
ii  dpkg-dev    1.17.6
ii  python-apt  0.9.3.5
ii  synaptic    0.81.1

-- no debconf information