<!DOCTYPE html>
<body>
<div>
<div><form></div>
<button id=b></button>
</div>
</body>
<script>
if (window.testRunner) {
    testRunner.dumpAsText();
    testRunner.waitUntilDone();
}
var b = document.getElementById('b');
document.body.innerHTML = '';
setTimeout(function() {
    if (window.GCController)
        GCController.collectAll();
    document.body.appendChild(b);
    document.body.innerHTML = 'PASS; no crash.';
    if (window.testRunner)
        testRunner.notifyDone();
}, 0);
</script>