LayoutTests/fast/js/exception-thrown-from-eval-inside-closure.html

<p>This page tests whether an exception thrown from an eval inside a closure
prematurely tears off the closure's activation.
</p>
<p>If the test passes, you'll see a PASS message below.
</p>
<pre id="console"></pre>

<script>
function log(s)
{
    document.getElementById("console").appendChild(document.createTextNode(s + "\n"));
}

function shouldBe(aDescription, a, b)
{
    if (a === b) {
        log("PASS: " + aDescription + " should be " + b + " and is.");
    } else {
        log("FAIL: " + aDescription + " should be " + b + " but instead is " + a + ".");
    }
}

if (window.layoutTestController)
    layoutTestController.dumpAsText();

// Create a function with an activation.
(function () {
    var x = 1;

    // Throw an exception inside an eval that requires a full scope chain.
    try {
        eval("(function () { throw 'exception'; })()");
    } catch(e) {
    }

    // Set "x" by resolving through the activation.
    (function () {
        x = 2;
    })();

    // Test the local register for "x", which should have been set to 2 above.
    shouldBe("x", x, 2);
}());
</script>