class DRb::DRbServer::InvokeMethod

def perform_without_block
  if Proc === @obj && @msg_id == :__drb_yield
    if @argv.size == 1
      ary = @argv
    else
      ary = [@argv]
    end
    ary.collect(&@obj)[0]
  else
    @obj.__send__(@msg_id, *@argv)
  end
end