diff -r 000000000000 -r 6474c204b198 js/src/tests/js1_5/Regress/regress-480244.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/tests/js1_5/Regress/regress-480244.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,53 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+//-----------------------------------------------------------------------------
+var BUGNUMBER = 480244;
+var summary = 'Do not assert: isInt32(*p)';
+var actual = '';
+var expect = '';
+
+
+//-----------------------------------------------------------------------------
+test();
+//-----------------------------------------------------------------------------
+
+function test()
+{
+  enterFunc ('test');
+  printBugNumber(BUGNUMBER);
+  printStatus (summary);
+
+  jit(true);
+
+  function outer() {
+    var v = 10.234;
+    for (var i = 0; i < 0xff; ++i) {
+      inner(v);
+    }
+  }
+
+  var g = 0;
+  var h = 0;
+
+  function inner() {
+    var v = 10;
+    for (var k = 0; k < 0xff; ++k) {
+      g++;
+      if (g & 0xff == 0xff)
+        h++;
+    }
+    return h;
+  }
+
+  outer();
+  print("g=" + g + " h=" + h);
+
+  jit(false);
+
+  reportCompare(expect, actual, summary);
+
+  exitFunc ('test');
+}