[Webkit-unassigned] [Bug 23075] New: Discarding quantifier on assertion gives incorrect result

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=23075

           Summary: Discarding quantifier on assertion gives incorrect
                    result
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: PC
        OS/Version: Windows XP
            Status: UNCONFIRMED
          Severity: Normal
          Priority: P2
         Component: JavaScriptCore
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: lrn at chromium.org


The follwing javascript expression 
 /^(?=a)?b$/.test("b")
evaluates to false since changeset 39164. It should give true, both according
to the ECMAScript specification and, e.g., what Firefox does.


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