In what ways does the following "eval" regularity break?

Mark S. Miller erights at
Thu Oct 30 11:12:35 PDT 2008

On Thu, Oct 30, 2008 at 11:00 AM, Maciej Stachowiak <mjs at> wrote:
> In recent WebKit versions, this test prints PASS twice:
> <pre><script>
> var a = "PASS";
> function foo(a, b, c) { return b(c); }
> document.writeln(foo(3, eval, 'a'));
> document.writeln(foo(3, window.eval, 'a'));
> </script></pre>
> (prints nothing if you remove the to-level var a declaration).
> Opera matches this behavior.
> In a recent Firefox nightly it also prints PASS twice, but FAIL twice if you
> remove the top-level declaration. That seems in line with your results
> above. I agree that is puzzling.

What's FAIL?


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