From: "vo.x (Vit Ondruch)" Date: 2012-12-08T23:10:24+09:00 Subject: [ruby-core:50696] [ruby-trunk - Bug #7534][Closed] /(?i:[\W])/ and /(?i:[\w])/ both match "s" Issue #7534 has been updated by vo.x (Vit Ondruch). Status changed from Open to Closed ---------------------------------------- Bug #7534: /(?i:[\W])/ and /(?i:[\w])/ both match "s" https://bugs.ruby-lang.org/issues/7534#change-34542 Author: hasari (Hiro Asari) Status: Closed Priority: Normal Assignee: Category: Target version: ruby -v: ruby 2.0.0dev (2012-12-08 trunk 38268) [x86_64-darwin12.2.1] If you drop any of the 3 conditions - case-insensitivity, character class, or "s" - this bug does not happen. See https://gist.github.com/4238886 -- http://bugs.ruby-lang.org/