[Webkit-unassigned] [Bug 31901] New: Incorrect behaviour of jneq_null in the interpreter

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=31901

           Summary: Incorrect behaviour of jneq_null in the interpreter
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: PC
        OS/Version: Mac OS X 10.5
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: JavaScriptCore
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: oliver at apple.com


The interpreters implementation of op_jneq_null is incorrect when the value
being compared is set to masquerade as undefined.  The result is that
if (document.all == null) {
    alert("PASS")
} else {
    alert("FAIL")
}
Will fail.

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