In article <1038560163.981998.11208.nullmailer / picachu.netlab.jp>,
  matz / ruby-lang.org (Yukihiro Matsumoto) writes:

> Array#pack("U") and String#unpack("U") are UTF-8 packer/unpacker, so
> that it should not restricted by Unicode standard additional
> restriction.   But I will add checks for malformed UTF-8 and redundant
> UTF-8 sequences (warnings with -w option).

Is there a way to detect the warnings from Ruby script?
-- 
Tanaka Akira