[DRE-maint] Bug#747555: ruby-fog-core: trying to overwrite '/usr/lib/ruby/vendor_ruby/fog/version.rb', which is also in package ruby-fog 1.22.0-1

[Axel Beckert]

Package: ruby-fog,ruby-fog-core
Version: ruby-fog-core/1.21.1+gh-1
Version: ruby-fog/1.22.0-1
Severity: serious

This is a very similar issue to https://bugs.debian.org/744010 but with
a different file:

Selecting previously unselected package ruby-fog-core.
Preparing to unpack .../ruby-fog-core_1.21.1+gh-1_all.deb ...
Unpacking ruby-fog-core (1.21.1+gh-1) ...
dpkg: error processing archive /var/cache/apt/archives/ruby-fog-core_1.21.1+gh-1_all.deb (--unpack):
 trying to overwrite '/usr/lib/ruby/vendor_ruby/fog/version.rb', which is also in package ruby-fog 1.22.0-1
Selecting previously unselected package ruby-fog-json.
Preparing to unpack .../ruby-fog-json_1.0.0-1_all.deb ...
Unpacking ruby-fog-json (1.0.0-1) ...
Selecting previously unselected package ruby-fog-brightbox.
Preparing to unpack .../ruby-fog-brightbox_0.0.2-1_all.deb ...
Unpacking ruby-fog-brightbox (0.0.2-1) ...
Preparing to unpack .../ruby-fog_1.22.0-2_all.deb ...
Unpacking ruby-fog (1.22.0-2) over (1.22.0-1) ...
Processing triggers for debian-security-support (2014.04.28) ...
Processing triggers for man-db (2.6.7.1-1) ...
Errors were encountered while processing:
 /var/cache/apt/archives/ruby-fog-core_1.21.1+gh-1_all.deb

Looks like a missing "Replaces" header or similar.

Happened on both, amd64 as well as kfreebsd-i386.

-- System Information:
Debian Release: jessie/sid
  APT prefers unstable
  APT policy: (990, 'unstable'), (600, 'testing'), (400, 'stable'), (110, 'experimental')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 3.12-trunk-amd64 (SMP w/1 CPU core)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash

Versions of packages ruby-fog-core depends on:
ii  ruby                          1:2.0.0.2
ii  ruby-builder                  3.2.2-1
ii  ruby-excon                    0.32.1-1
ii  ruby-formatador               0.2.1-2
ii  ruby-mime-types               1.25-1
ii  ruby-net-scp                  1.1.1-2
ii  ruby-net-ssh                  1:2.6.8-2
ii  ruby1.9.1 [ruby-interpreter]  1.9.3.484-2
ii  ruby2.0 [ruby-interpreter]    2.0.0.484+really457-3
ii  ruby2.1 [ruby-interpreter]    2.1.1-4

ruby-fog-core recommends no packages.

ruby-fog-core suggests no packages.

-- no debconf information