[Webkit-unassigned] [Bug 16696] JSCRE fails fails to match Acid3 regexp

[bugzilla-daemon at webkit.org]

http://bugs.webkit.org/show_bug.cgi?id=16696





------- Comment #3 from ian at hixie.ch  2008-01-01 14:29 PDT -------
Forward references to capture brackets that haven't been seen yet, in ES4, are
defined to always match the empty string. So this:
   /a(\2)(x)a/
...matches only "axa", not "axxa", and on a positive match always returns
['axa', '', 'x', 'a'].

FWIW, ES4 regexps are not Perl-compatible in this and many other edge cases.


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