Add a crashtest

content/xul/content/crashtests/386947-1.xul

@@ -0,0 +1,12 @@
+<?xml version="1.0"?>
+<window xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"
+        style="background-color: red" onload="boom();">
+        
+<script><![CDATA[
+        
+function boom() {
+  document.documentElement.style.MozBinding = "url('#t')";
+}
+
+]]></script>
+</window>

content/xul/content/crashtests/crashtests.list

@@ -6,3 +6,4 @@ load 336096-1.xhtml
 load 354611-1.html
 load 360078-1.xhtml
 load 363791-1.xul
+load 386947-1.xul