diff -r 000000000000 -r 6474c204b198 js/src/tests/js1_5/Regress/regress-465132.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/tests/js1_5/Regress/regress-465132.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,45 @@
+/* -*- 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 = 465132;
+var summary = 'TM: Mathematical constants should be constant';
+var actual = '';
+var expect = '';
+
+
+//-----------------------------------------------------------------------------
+test();
+//-----------------------------------------------------------------------------
+
+function test()
+{
+  enterFunc ('test');
+  printBugNumber(BUGNUMBER);
+  printStatus (summary);
+
+  jit(true);
+
+  var constants = ['E', 'LN10', 'LN2', 'LOG2E', 'LOG10E', 'PI', 'SQRT1_2', 'SQRT2'];
+
+  for (var j = 0; j < constants.length; j++)
+  {
+    expect = Math[constants[j]];
+
+    for(i=0;i<9;++i) 
+      ++Math[constants[j]];
+
+    for(i=0;i<9;++i) 
+      eval('++Math.' + constants[j]);
+
+    actual = Math[constants[j]];
+
+    reportCompare(expect, actual, summary + ' Math.' + constants[j]);
+  }
+
+  jit(false);
+
+  exitFunc ('test');
+}