[Webkit-unassigned] [Bug 59795] New: Inconsistent SyntaxError from new Function(...)

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=59795

           Summary: Inconsistent SyntaxError from new Function(...)
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Macintosh
        OS/Version: Mac OS X 10.5
            Status: UNCONFIRMED
          Severity: Normal
          Priority: P2
         Component: JavaScriptCore
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: mikesamuel at gmail.com


Executing the Function constructor with a mis-parenthesized input thus
    Function("(i + (j)")
exits abruptly with a SyntaxError:
    SyntaxError: Parse error

Executing the same but with the return keyword before the mis-parenthesized expression does not error out:
    Function("return (i + (j)")
evaluates normally with the value
    function anonymous() { return (i + (j);
    }

I expected the first example and the second example to both produce a SyntaxError.
I.e., if this is fixed, I expect
    Function("return (i + (j)")


Note that
    var i = 1
    var j = 2
    typeof Function("return (i + (j)")()
evaluates normally with the string
    "undefined"
not "number" as might be done if bad inputs are being intentionally massaged or a SyntaxError as might be done if parsing is intentionally done lazily.

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