This is a bug right? def foo(a, *a) p a end foo(1,2,3) 1.8 and 1.9 have this. JRuby gives duplicate argument error (which I would like to leave as an error). -Tom -- Thomas E Enebo <thomas.enebo / sun.com> JRuby Core Developer, http://www.bloglines.com/blog/ThomasEEnebo