diff --git a/layout/base/crashtests/415503.xhtml b/layout/base/crashtests/415503.xhtml
new file mode 100644
index 000000000000..b2fcae89f6bb
--- /dev/null
+++ b/layout/base/crashtests/415503.xhtml
@@ -0,0 +1,28 @@
+<html xmlns="http://www.w3.org/1999/xhtml"
+      xmlns:xul="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul">
+<head>
+
+<style id="ss" type="text/css">
+
+span, popupgroup { display: table; position: absolute; }
+
+</style>
+
+<script type="text/javascript">
+
+function boom()
+{
+  var ss = document.getElementById("ss");
+  ss.removeChild(ss.firstChild);
+}
+
+</script>
+
+</head>
+
+<body onload="boom();">
+
+<span><xul:popupgroup/></span>
+
+</body>
+</html>
diff --git a/layout/base/crashtests/crashtests.list b/layout/base/crashtests/crashtests.list
index 1c212b026647..32abb215302c 100644
--- a/layout/base/crashtests/crashtests.list
+++ b/layout/base/crashtests/crashtests.list
@@ -228,6 +228,7 @@ load 412651-1.html
 load 413587-1.svg
 load 414058-1.html
 load 414175-1.xul
+load 415503.xhtml
 load 420031-1.html
 load 420213-1.html
 load 420219-1.html
