verify_files

# File lib/rubygems/package.rb, line 565
  def verify_files gem
    gem.each do |entry|
      verify_entry entry
    end

    unless @spec then
      raise Gem::Package::FormatError.new 'package metadata is missing', @gem
    end

    unless @files.include? 'data.tar.gz' then
      raise Gem::Package::FormatError.new                'package content (data.tar.gz) is missing', @gem
    end
  end