diff --git a/js/tests/js1_5/Array/regress-94257.js b/js/tests/js1_5/Array/regress-94257.js
new file mode 100644
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+++ b/js/tests/js1_5/Array/regress-94257.js
@@ -0,0 +1,99 @@
+/*
+* The contents of this file are subject to the Netscape Public
+* License Version 1.1 (the "License"); you may not use this file
+* except in compliance with the License. You may obtain a copy of
+* the License at http://www.mozilla.org/NPL/
+*
+* Software distributed under the License is distributed on an "AS
+* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
+* implied. See the License for the specific language governing
+* rights and limitations under the License.
+*
+* The Original Code is mozilla.org code.
+*
+* The Initial Developer of the Original Code is Netscape
+* Communications Corporation.  Portions created by Netscape are
+* Copyright (C) 1998 Netscape Communications Corporation.
+* All Rights Reserved.
+*
+* Contributor(s): wtam@bigfoot.com, pschwartau@netscape.com
+* Date: 30 October 2001
+*
+* SUMMARY: Regression test for bug 94257
+* See http://bugzilla.mozilla.org/show_bug.cgi?id=94257
+*
+* Rhino used to crash on this code; specifically, on the line
+*
+*                       arr[1+1] += 2;
+*/
+//-----------------------------------------------------------------------------
+var UBound = 0;
+var bug = 94257;
+var summary = "Making sure we don't crash on this code -";
+var status = '';
+var statusitems = [];
+var actual = '';
+var actualvalues = [];
+var expect= '';
+var expectedvalues = [];
+
+
+var arr = new Array(6);
+arr[1+1] = 1;
+arr[1+1] += 2;
+
+
+status = inSection(1);
+actual = arr[1+1];
+expect = 3;
+addThis();
+
+status = inSection(2);
+actual = arr[1+1+1];
+expect = undefined;
+addThis();
+
+status = inSection(3);
+actual = arr[1];
+expect = undefined;
+addThis();
+
+
+arr[1+2] = 'Hello';
+
+
+status = inSection(4);
+actual = arr[1+1+1];
+expect = 'Hello';
+addThis();
+
+
+
+//-----------------------------------------------------------------------------
+test();
+//-----------------------------------------------------------------------------
+
+
+
+function addThis()
+{
+  statusitems[UBound] = status;
+  actualvalues[UBound] = actual;
+  expectedvalues[UBound] = expect;
+  UBound++;
+}
+
+
+function test()
+{
+  enterFunc ('test');
+  printBugNumber (bug);
+  printStatus (summary);
+
+  for (var i=0; i<UBound; i++)
+  {
+    reportCompare(expectedvalues[i], actualvalues[i], statusitems[i]);
+  }
+
+  exitFunc ('test');
+}