<!DOCTYPE HTML>
<html>
<!-- Test for WK92604 - Passes if no crash occurs and "PASS" is printed. -->
<body id="body">
<svg xmlns="http://www.w3.org/2000/svg">
    <line stroke="green" vector-effect="non-scaling-stroke" y2="1"/>
    <defs id="defs"></defs>
</svg>
<script>
    if (window.testRunner) {
        testRunner.dumpAsText();
        testRunner.waitUntilDone();
    }

    var body = document.getElementById("body");
    var defs = document.getElementById("defs");
    document.addEventListener("DOMContentLoaded", doCrash, false);

    body.addEventListener("DOMSubtreeModified", function() {
        // Prevent infinite loop of modification events.
        this.removeEventListener("DOMSubtreeModified", arguments.callee);

        document.write("This test passes if no crash occurs and PASS is printed. PASS");

        if (window.testRunner)
            testRunner.notifyDone();
    }, false);

    function doCrash() {
        var farthestViewportElement = defs["farthestViewportElement"];
        var externalResourcesRequired = farthestViewportElement["externalResourcesRequired"];
        externalResourcesRequired["baseVal"] = undefined;
        body.offsetWidth;
        body.innerHTML = "FAIL";
    }
</script>
</body>
</html>