diff -r 000000000000 -r 6474c204b198 js/src/tests/js1_7/regress/regress-363040-02.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/tests/js1_7/regress/regress-363040-02.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 -*- */
+/* 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 = 363040;
+var summary = 'Array.prototype.reduce application in array flattening';
+var actual = '';
+var expect = '';
+
+
+//-----------------------------------------------------------------------------
+test();
+//-----------------------------------------------------------------------------
+
+function test()
+{
+  enterFunc ('test');
+  printBugNumber(BUGNUMBER);
+  printStatus (summary);
+ 
+  function flatten(arr)
+  {
+    function op(partial, item)
+    {
+      if (item instanceof Array)
+        Array.prototype.push.apply(partial, flatten(item));
+      else
+        partial.push(item);
+
+      return partial;
+    }
+
+    return arr.reduce(op, []);
+  }
+
+  expect = [1, 2, 3];
+  actual = flatten([1, 2, 3]);      // [1, 2, 3]
+  reportCompare(expect + '', actual + '', summary + ': ' + expect);
+
+  expect = [1, 2, 3];
+  actual = flatten([1, [2], 3]);    // [1, 2, 3]
+  reportCompare(expect + '', actual + '', summary + ': ' + expect);
+
+  expect = [2, 3];
+  actual = flatten([[], 2, 3]);     // [2, 3]
+  reportCompare(expect + '', actual + '', summary + ': ' + expect);
+
+  expect = [1, 2, 3];
+  actual = flatten([[1], 2, 3]);    // [1, 2, 3]
+  reportCompare(expect + '', actual + '', summary + ': ' + expect);
+
+  expect = [4];
+  actual = flatten([[[[4]]]]);      // [4]
+  reportCompare(expect + '', actual + '', summary + ': ' + expect);
+
+  expect = [1, 2, 3];
+  actual = flatten([1, [2, [3]]]);  // [1, 2, 3]
+  reportCompare(expect + '', actual + '', summary + ': ' + expect);
+
+  expect = [];
+  actual = flatten([[[[[]]]]]);     // []
+  reportCompare(expect + '', actual + '', summary + ': ' + expect);
+
+  exitFunc ('test');
+}