initialize_copy

# File lib/rubygems/specification.rb, line 1866
  def initialize_copy other_spec
    self.class.array_attributes.each do |name|
      name = :"@#{name}"
      next unless other_spec.instance_variable_defined? name

      begin
        val = other_spec.instance_variable_get(name)
        if val then
          instance_variable_set name, val.dup
        elsif Gem.configuration.really_verbose
          warn "WARNING: #{full_name} has an invalid nil value for #{name}"
        end
      rescue TypeError
        e = Gem::FormatException.new            "#{full_name} has an invalid value for #{name}"

        e.file_path = loaded_from
        raise e
      end
    end
  end