<?xml version="1.0" encoding="UTF-8"?>
<html xmlns="http://www.w3.org/1999/xhtml" xmlns:m="http://www.w3.org/1998/Math/MathML" xml:lang="en">
<head>
<script>
    if (window.testRunner)
        testRunner.dumpAsText();
</script>
</head>
<body>
<math xmlns="http://www.w3.org/1998/Math/MathML"> 
    <mtext>This test passes if it does not crash.</mtext> 
    <mrow> 
        <munderover></munderover> 
    </mrow> 
</math>
</body>
</html>