479168 - Regular Expression (Regex) enters infinite loop?

Status: RESOLVED INCOMPLETE

(Core :: JavaScript Engine, defect)

Description

[karl]

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.6) Gecko/2009011913 Firefox/3.0.6
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.2a1pre) Gecko/20090218 Minefield/3.2a1pre

When attempting to test a particular string with a particular regular expression the line failed to evaluate, and an Unresponsive Script Error message was shown.

The line is:
//^\w+(_\w+)+$//.test("000_000_000_000_000_000_000_000_000_000_000_000_000_000_000_000_000_000_000_000_000_000_000_000_000_000_000_000(number)")



Reproducible: Always

Steps to Reproduce:
1.Navigate to example page (http://werehamster.net/bugs/regex-bug.html)
2.run through tests
Actual Results:  
Firefox hangs, until the unresponsive script error message appears, whereupon it it possible to halt the script.

Expected Results:  
The regular expression should be evaluated correctly, or if that is not possible, then an error should be thrown.

#444926 is a similar ticker, however that appears to be solved (at least in minefield latest).

Comment 1

[Dave Garrett]

Confirmed on Linux with 3.0.6 and 3.1b3pre. Hangs on 3rd test.

Comment 2

[Wayne Mery (:wsmwk)]

Is this reproducible with FF 3.6 or 4.0beta?

Comment 3

[Gary Kwong [:gkw] [:nth10sd] (NOT official MoCo now)]

(In reply to comment #2)
> Is this reproducible with FF 3.6 or 4.0beta?

http://xenomonkey.com/bugs/regex-bug.html no longer exists.

Comment 4

[Wayne Mery (:wsmwk)]

> http://xenomonkey.com/bugs/regex-bug.html no longer exists.

indeed