chromium/third_party/blink/web_tests/external/wpt/mathml/crashtests/mozilla/373472-2.xhtml

<html xmlns="http://www.w3.org/1999/xhtml">
<head>
</head>
<body>

<p><math xmlns="http://www.w3.org/1998/Math/MathML"><mroot><mo>k</mo></mroot></math></p>

</body>
</html>