gecko-dev/layout/generic/crashtests/534366-2.html

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HTML

<html>
<head>
<style type="text/css">
body { font-family: monospace; width: 4ch; }
body::first-line { }
body *::before { content: 'w';}
</style>
<script type="text/javascript">
function boom()
{
var de = document.documentElement;
var body = document.body;
var span = document.createElementNS("http://www.w3.org/1999/xhtml", "span");
var r1 = document.createElementNS("http://www.w3.org/1998/Math/MathML", "mrow");
var mmm = document.createElementNS("http://www.w3.org/1998/Math/MathML", "mmultiscripts");
body.appendChild(span);
r1.appendChild(document.createElementNS("http://www.w3.org/1998/Math/MathML", "mrow"));
body.appendChild(r1);
body.appendChild(mmm);
de.offsetHeight;
r1.appendChild(document.createElementNS("http://www.w3.org/1998/Math/MathML", 'mrow'));
de.offsetHeight;
mmm.appendChild(document.createElementNS("http://www.w3.org/1998/Math/MathML", 'mrow'));
de.offsetHeight;
document.removeChild(de);
document.appendChild(de);
de.offsetHeight;
}
window.addEventListener("load", boom, false);
</script>
</head>
<body></body>
</html>