Bugzilla Bug 250245

$ rails foo
(snip)
$ cd foo
$ ruby script/server
Rails requires RubyGems >= 1.3.1 (you have 1.2.0). Please `gem update --system`
and try again.

in config/boot.rb:
      def load_rubygems
        require 'rubygems'
        min_version = '1.3.1'
        unless rubygems_version >= min_version
          $stderr.puts %Q(Rails requires RubyGems >= #{min_version} (you have
#{
rubygems_version}). Please `gem update --system` and try again.)
          exit 1
        end

So, I think '>=dev-ruby/rubygems-1.3.1' should be added to RDEPEND of
dev-ruby/rails-2.2.2-r1.

Agreed, and fixed for dev-ruby/rails-2.2.2-r1.