diff -r 000000000000 -r 6474c204b198 js/src/tests/js1_5/Regress/regress-449666.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/tests/js1_5/Regress/regress-449666.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,67 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/*
+ * Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/licenses/publicdomain/
+ * Contributor: Robert Sayre
+ */
+
+//-----------------------------------------------------------------------------
+var BUGNUMBER = 449666;
+var summary = 'Do not assert: JSSTRING_IS_FLAT(str_)';
+var actual = '';
+var expect = '';
+
+
+//-----------------------------------------------------------------------------
+test();
+//-----------------------------------------------------------------------------
+
+function test()
+{
+  enterFunc ('test');
+  printBugNumber(BUGNUMBER);
+  printStatus (summary);
+
+  var global;
+
+  jit(true);
+
+  if (typeof window == 'undefined') {
+    global = this;
+  }
+  else {
+    global = window;
+  }
+
+  if (!global['g']) {
+    global['g'] = {};
+  }
+
+  if (!global['g']['l']) {
+    global['g']['l'] = {};
+    (function() {
+      function k(a,b){
+        var c=a.split(/\./);
+        var d=global;
+        for(var e=0;e<c.length-1;e++){
+          if(!d[c[e]]){
+            d[c[e]]={};
+          }
+          d=d[c[e]];
+        }
+        d[c[c.length-1]]=b;
+        print("hi");
+      }
+
+      function T(a){return "hmm"}
+      k("g.l.loaded",T);
+    })();
+
+  }
+
+  jit(false);
+
+  reportCompare(expect, actual, summary);
+
+  exitFunc ('test');
+}