--- status ruby 1.7 feature

    λơ֤ޤλơ exit 
    SystemExit.new ʤɤꤵޤ

        begin
          exit(1)
        rescue SystemExit
          p $!
          p $!.status
        end

        => #<SystemExit: exit>
           1

        begin
          raise SystemExit.new(1, "bogus exit")
        rescue SystemExit
          p $!
          p $!.status
        end

        => #<SystemExit: bogus exit>
           1

