1 files changed, 19 insertions, 0 deletions
diff --git a/dom/base/crashtests/439206-1.html b/dom/base/crashtests/439206-1.html
new file mode 100644
index 0000000000..688ebe44d5
--- /dev/null
+++ b/dom/base/crashtests/439206-1.html
@@ -0,0 +1,19 @@
+<!DOCTYPE html>
+<html>
+<head>
+<script type="text/javascript">
+
+function boom()
+{
+  var s = document.createElement("STYLE");
+  var t = document.createTextNode("\uDB00x"); // a high surrogate followed by 'x'
+  document.documentElement.appendChild(s);
+  s.appendChild(t);
+}
+
+</script>
+</head>
+
+<body onload="boom();">
+</body>
+</html>