[MacRuby-devel] regex error with negative look-ahead and look-behind

When combining negative look-ahead with look-behind in a regexp, macruby doesn't match correctly. Here's an example. ruby 1.9.2

...

m = "abc123abc".match /(?<=\w) (\d{3}) (?!\d)/x => #<MatchData "123" 1:"123"> m.to_s => "123"

macruby (0.9)

...

m = "abc123abc".match /(?<=\w) (\d{3}) (?!\d)/x => #<MatchData "" 1:"123"> m.to_s => ""