diff --git a/layout/generic/crashtests/645072-2.html b/layout/generic/crashtests/645072-2.html
new file mode 100644
index 00000000000..fca395e906e
--- /dev/null
+++ b/layout/generic/crashtests/645072-2.html
@@ -0,0 +1,17 @@
+<!DOCTYPE html> 
+<html> 
+<head> 
+<script> 
+ 
+function boom()
+{
+  document.documentElement.offsetHeight;
+  document.getElementById("f").appendChild(document.createTextNode("\u00AD"));
+  document.documentElement.offsetHeight;
+}
+ 
+</script> 
+</head> 
+<body onload="boom();"><fieldset id="f"> </fieldset></body> 
+</html>
+
diff --git a/layout/generic/crashtests/crashtests.list b/layout/generic/crashtests/crashtests.list
index 18fd803bdbe..c39d31d5a17 100644
--- a/layout/generic/crashtests/crashtests.list
+++ b/layout/generic/crashtests/crashtests.list
@@ -354,3 +354,5 @@ load 604843.html
 load 605340.html
 load 621841-1.html
 load 645072-1.html
+load 645072-2.html
+
