Bug#543425: apt-get silently ignores typo'd flag -o Dir::Etc:Preferences (should be -o Dir::Etc::Preferences)

[Mark Painter <mpainter@google.com>]

Package: apt
Version: 0.7.9ubuntu17.2
Severity: normal


Running something like 'apt-get -o Dir::Etc:Preferences=/etc/foo/preferences
dist-upgrade' will silently ignore the typo and use /etc/apt/preferences.

It would be much nicer if there was at least a warning about the incorrect
flag, or perhaps bailing out.

-- Package-specific info:

-- (/etc/apt/preferences present, but not submitted) --


-- (/etc/apt/sources.list present, but not submitted) --


-- System Information:
Debian Release: lenny/sid
  APT prefers hardy-updates
  APT policy: (600, 'hardy-updates'), (600, 'hardy-security'), (600, 'hardy'), (400, 'hardy-backports')
Architecture: amd64 (x86_64)

Kernel: Linux 2.6.24-24-generic (SMP w/2 CPU cores)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/bash

Versions of packages apt depends on:
ii  libc6                   2.7-10ubuntu4    GNU C Library: Shared libraries
ii  libgcc1                 1:4.2.4-1ubuntu4 GCC support library
ii  libstdc++6              4.2.4-1ubuntu4   The GNU Standard C++ Library v3

Versions of packages apt recommends:
ii  ubuntu-keyring                2008.03.04 GnuPG keys of the Ubuntu archive

-- no debconf information