<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<script>
// This test case should not leak.
function leak()
{
    var img = document.createElement("img");
    var iframe = document.createElement("iframe");
    img.appendChild(iframe);
    document.body.appendChild(img);

    document.addEventListener('Foo', function(){});
}
</script>
</head>
<body onload="leak();"></body>
</html>
