[Webkit-unassigned] [Bug 46904] New: The backreference checking isn't working in some cases with YARR Interpreter

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=46904

           Summary: The backreference checking isn't working in some cases
                    with YARR Interpreter
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: All
        OS/Version: All
            Status: UNCONFIRMED
          Severity: Normal
          Priority: P2
         Component: JavaScriptCore
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: pvarga at inf.u-szeged.hu
                CC: barraclough at apple.com, zherczeg at webkit.org,
                    msaboff at apple.com


The YARR Interpreter doesn't handle the case when a backreference points to the same parentheses where it is.
Therefore the YARR Interpreter causes assertion in debug mode and a regression in a JSC test.

Eg.:
"a".match(/(a\1)/;
result: ,
expected: a,a

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