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diff --git a/js/src/tests/non262/Array/regress-101488.js b/js/src/tests/non262/Array/regress-101488.js
new file mode 100644
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@@ -0,0 +1,135 @@
+/* -*- indent-tabs-mode: nil; js-indent-level: 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/. */
+
+/*
+ * Date: 24 September 2001
+ *
+ * SUMMARY: Try assigning arr.length = new Number(n)
+ * From correspondence with Igor Bukanov <igor@icesoft.no>
+ * See http://bugzilla.mozilla.org/show_bug.cgi?id=101488
+ *
+ * Without the "new" keyword, assigning arr.length = Number(n) worked.
+ * But with it, Rhino was giving an error "Inappropriate array length"
+ * and SpiderMonkey was exiting without giving any error or return value -
+ *
+ * Comments on the Rhino code by igor@icesoft.no:
+ *
+ * jsSet_length requires that the new length value should be an instance
+ * of Number. But according to Ecma 15.4.5.1, item 12-13, an error should
+ * be thrown only if ToUint32(length_value) != ToNumber(length_value)
+ */
+//-----------------------------------------------------------------------------
+var UBound = 0;
+var BUGNUMBER = 101488;
+var summary = 'Try assigning arr.length = new Number(n)';
+var status = '';
+var statusitems = [];
+var actual = '';
+var actualvalues = [];
+var expect= '';
+var expectedvalues = [];
+var arr = [];
+
+
+status = inSection(1);
+arr = Array();
+tryThis('arr.length = new Number(1);');
+actual = arr.length;
+expect = 1;
+addThis();
+
+status = inSection(2);
+arr = Array(5);
+tryThis('arr.length = new Number(1);');
+actual = arr.length;
+expect = 1;
+addThis();
+
+status = inSection(3);
+arr = Array();
+tryThis('arr.length = new Number(17);');
+actual = arr.length;
+expect = 17;
+addThis();
+
+status = inSection(4);
+arr = Array(5);
+tryThis('arr.length = new Number(17);');
+actual = arr.length;
+expect = 17;
+addThis();
+
+
+/*
+ * Also try the above with the "new" keyword before Array().
+ * Array() and new Array() should be equivalent, by ECMA 15.4.1.1
+ */
+status = inSection(5);
+arr = new Array();
+tryThis('arr.length = new Number(1);');
+actual = arr.length;
+expect = 1;
+addThis();
+
+status = inSection(6);
+arr = new Array(5);
+tryThis('arr.length = new Number(1);');
+actual = arr.length;
+expect = 1;
+addThis();
+
+arr = new Array();
+tryThis('arr.length = new Number(17);');
+actual = arr.length;
+expect = 17;
+addThis();
+
+status = inSection(7);
+arr = new Array(5);
+tryThis('arr.length = new Number(17);');
+actual = arr.length;
+expect = 17;
+addThis();
+
+
+
+//-----------------------------------------------------------------------------
+test();
+//-----------------------------------------------------------------------------
+
+
+
+function tryThis(s)
+{
+  try
+  {
+    eval(s);
+  }
+  catch(e)
+  {
+    // keep going
+  }
+}
+
+
+function addThis()
+{
+  statusitems[UBound] = status;
+  actualvalues[UBound] = actual;
+  expectedvalues[UBound] = expect;
+  UBound++;
+}
+
+
+function test()
+{
+  printBugNumber(BUGNUMBER);
+  printStatus (summary);
+
+  for (var i=0; i<UBound; i++)
+  {
+    reportCompare(expectedvalues[i], actualvalues[i], statusitems[i]);
+  }
+}