diff -r 000000000000 -r 6474c204b198 js/src/tests/ecma_5/Global/adding-global-var-nonextensible-error.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/tests/ecma_5/Global/adding-global-var-nonextensible-error.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,36 @@
+// |reftest| skip
+// Any copyright is dedicated to the Public Domain.
+// http://creativecommons.org/licenses/publicdomain/
+
+//-----------------------------------------------------------------------------
+var BUGNUMBER = 621432;
+var summary =
+  "If a var statement can't create a global property because the global " +
+  "object isn't extensible, and an error is thrown while decompiling the " +
+  "global, don't assert";
+
+print(BUGNUMBER + ": " + summary);
+
+/**************
+ * BEGIN TEST *
+ **************/
+
+var toSource = [];
+Object.preventExtensions(this);
+
+try
+{
+  eval("var x;");
+  throw new Error("no error thrown");
+}
+catch (e)
+{
+  reportCompare(e instanceof TypeError, true, "expected TypeError, got: " + e);
+}
+
+/******************************************************************************/
+
+if (typeof reportCompare === "function")
+  reportCompare(true, true);
+
+print("All tests passed!");