[Webkit-unassigned] [Bug 42664] New: Simple lookahead hangs Yarr

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=42664

           Summary: Simple lookahead hangs Yarr
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: PC
               URL: https://bugzilla.mozilla.org/show_bug.cgi?id=576811
        OS/Version: Mac OS X 10.5
            Status: NEW
          Keywords: NeedsRadar
          Severity: Normal
          Priority: P2
         Component: JavaScriptCore
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: oliver at apple.com


>From mozilla: https://bugzilla.mozilla.org/show_bug.cgi?id=576811

/(?:(?=x))+/.exec("x")

Hangs in JIT code under JSC::Yarr::RegexCodeBlock::execute.

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