ads@ads-kubuntu:~/rubinius$ shotgun/rubinius
irb(main):001:0> def foo(bar=1, baz=2)
irb(main):002:1> puts bar
irb(main):003:1> puts baz
irb(main):004:1> end
=> #
irb(main):005:0> foo(UndefClass.new1, 5)
Value not passed
1
5
=> nil