RESOLVED WORKSFORME 16514
RegExp properties should not depend on RegExp.input 
https://bugs.webkit.org/show_bug.cgi?id=16514
Summary RegExp properties should not depend on RegExp.input
Kevin Millikin
Reported 2007-12-19 04:26:10 PST
Changing RegExp.input should not change RegExp.lastMatch, RegExp.$1, etc. In Safari 523.13: 'This seems like the right behavior'.match(/right/); RegExp.lastMatch; // == 'right' RegExp.input = 'Whereas this one is wrong, yo'; RegExp.lastMatch; // == 'wrong'
Attachments
Test case (282 bytes, text/html)
2007-12-19 05:49 PST, David Kilzer (:ddkilzer) 		no flags
Details
View All Add attachment proposed patch, testcase, etc.
David Kilzer (:ddkilzer)
Comment 1 2007-12-19 05:49:21 PST
Created attachment 17989 [details] Test case MSIE 7 and Firefox 2.0.0.11 report "right" in both cases (as expected). Opera 9.24 reports "undefined" in both cases (apparently doesn't support these properties on their RegExp object). A local debug build of WebKit r28828 with Safari 3.0.4 (523.12) on Mac OS X 10.4.11 (8S165) reports "right" and "wrong".
David Kilzer (:ddkilzer)
Comment 2 2007-12-19 05:51:51 PST
Not a regression from Safari 2.0.4 as it reports "undefined" for both values.
Kevin Millikin
Comment 3 2007-12-19 06:09:42 PST
Thanks for looking into this. It looks like all the deprecated properties of the RegExp constructor (lastMatch, leftContext, rightContext, lastParen, and $1 through $9) are computed lazily based on RegExp.input. However, RegExp.input is not necessarily the last matching subject string.
Gavin Barraclough
Comment 4 2011-09-06 22:30:36 PDT
Looks like this is a very old bug; this works fine in ToT.
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