From: matz@... (Yukihiro Matsumoto) Date: 2001-05-29T17:52:52+09:00 Subject: [ruby-talk:15917] Re: Regexp (a\1) Hi, Sorry for being late. In message "[ruby-talk:15162] Regexp (a\1)" on 01/05/15, ts writes: | Someone can explain me this result : | |pigeon% ruby -e '/(a\1)/ =~ "a\001"; p $&' |"a" |pigeon% | | With this comment, I expect a match on "a\001" | | /* Can't back reference to a subexpression if inside of it. */ You're right. The patch will be merged. matz.