<html xmlns="http://www.w3.org/1999/xhtml" class="reftest-wait"> <head> <title>Testcase for MathML crash</title> <script><![CDATA[ function boom() { var div = document.getElementById("div"); var mi = document.getElementById("mi"); mi.appendChild(div); mi.removeChild(div); document.documentElement.removeAttribute("class"); } ]]></script> </head> <body onload="setTimeout(boom, 30);"> <div style="float: right;" id="div">Floated div</div> <math xmlns="http://www.w3.org/1998/Math/MathML" display="block"><mi id="mi">mi</mi></math> </body> </html>