From: "David A. Black" <dblack@...>
Date: 2009-12-20T23:16:42+09:00
Subject: [ruby-core:27248] Re: [Bug #2508] The {n} repetition notation issue in Regexp

Hi --

On Sun, 20 Dec 2009, katz bo wrote:

> Bug #2508: The {n} repetition notation issue in Regexp
> http://redmine.ruby-lang.org/issues/show/2508
>
> Author: katz bo
> Status: Open, Priority: Normal
> Category: core
> ruby -v:  ruby 1.9.1p376 (2009-12-07 revision 26041) [i686-linux]
>
> There seems to be a bug in Ruby 1.9 regarding Regular Expression:
>
> /(io){1}x/ =~ 'ioiox' # => 2 #fine
> /(io){2}x/ =~ 'ioiox' # => nil #should be 0
> /(io){2,2}x/ =~ 'ioiox'# => nil #should be 0
> #below are correct
> /(?:io){2}x/ =~ 'ioiox' # => 0
> /(io){2}/ =~ 'ioiox' # => 0
> /(io){2,}x/ =~ 'ioiox' # => 0
> /(io){,2}x/ =~ 'ioiox' # => 0

I would call this a severe bug.


David

-- 
David A. Black
Senior Developer, Cyrus Innovation Inc.
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