diff --git a/layout/mathml/crashtests/413063-1.xhtml b/layout/mathml/crashtests/413063-1.xhtml
new file mode 100644
index 00000000000..425db9a8185
--- /dev/null
+++ b/layout/mathml/crashtests/413063-1.xhtml
@@ -0,0 +1,21 @@
+<html xmlns="http://www.w3.org/1999/xhtml" xmlns:m="http://www.w3.org/1998/Math/MathML">
+<head>
+<script type="text/javascript">
+
+function boom()
+{
+  var mtd = document.getElementById("mtd");
+  var ns = document.createElementNS("http://www.w3.org/1999/xhtml", "span");
+  var nt = document.createTextNode("foo"); 
+  ns.appendChild(nt); 
+  mtd.appendChild(ns);
+  mtd.setAttribute("rowspan", "0");
+}
+
+
+</script>
+</head>
+
+<body onload="boom();"><m:mtd id="mtd" style="display: table-footer-group"><m:mi /></m:mtd></body>
+
+</html>
diff --git a/layout/mathml/crashtests/crashtests.list b/layout/mathml/crashtests/crashtests.list
index af5a0d1a329..e8856a4037a 100644
--- a/layout/mathml/crashtests/crashtests.list
+++ b/layout/mathml/crashtests/crashtests.list
@@ -29,3 +29,4 @@ load 400475-1.xhtml
 load 402400-1.xhtml
 load 405187-1.xhtml
 load 405271-1.xml
+load 413063-1.xhtml
