# File lib/git-version-bump.rb, line 65
        def self.patch_version(use_local_git=false)
                ver = version(use_local_git)
                v   = ver.split('.')[2]

                unless v =~ /^[0-9]+$/
                        raise ArgumentError,
                                "#{v} (part of #{ver.inspect}) is not a numeric version component.  Abandon ship!"
                end

                return v.to_i
        end