From: ts Date: 2003-06-20T19:25:57+09:00 Subject: Re: In 1.8.0 nil.to_s is not the same as "" >>>>> "n" == nobu nokada writes: n> Try this patch. You have the same with class A def to_str String.new(nil.to_s) end end a = "a" b = A.new a.send(b) Guy Decoux p.s. : plruby don't like this case, and it's protected against it ...