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diff --git a/js/src/tests/js1_5/Regress/regress-146596.js b/js/src/tests/js1_5/Regress/regress-146596.js
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@@ -0,0 +1,158 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla 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/MPL/
+ *
+ * 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 JavaScript Engine testing utilities.
+ *
+ * The Initial Developer of the Original Code is
+ * Netscape Communications Corp.
+ * Portions created by the Initial Developer are Copyright (C) 2002
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *   jim-patterson@ncf.ca, brendan@mozilla.org,
+ *   pschwartau@netscape.com
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+/*
+ *
+ * Date:    18 Jun 2002
+ * SUMMARY: Shouldn't crash when catch parameter is "hidden" by varX
+ * See http://bugzilla.mozilla.org/show_bug.cgi?id=146596
+ *
+ */
+//-----------------------------------------------------------------------------
+var UBound = 0;
+var BUGNUMBER = 146596;
+var summary = "Shouldn't crash when catch parameter is 'hidden' by varX";
+var status = '';
+var statusitems = [];
+var actual = '';
+var actualvalues = [];
+var expect= '';
+var expectedvalues = [];
+
+
+/*
+ * Just seeing we don't crash when executing this function -
+ * This example provided by jim-patterson@ncf.ca
+ *
+ * Brendan: "Jim, thanks for the testcase. But note that |var|
+ * in a JS function makes a function-scoped variable --  JS lacks
+ * block scope apart from for catch variables within catch blocks.
+ *
+ * Therefore the catch variable hides the function-local variable."
+ */
+function F()
+{
+  try
+  {
+    return "A simple exception";
+  }
+  catch(e)
+  {
+    var e = "Another exception";
+  }
+
+  return 'XYZ';
+}
+
+status = inSection(1);
+actual = F();
+expect = "A simple exception";
+addThis();
+
+
+
+/*
+ * Sanity check by Brendan: "This should output
+ *
+ *             24
+ *             42
+ *          undefined
+ *
+ * and throw no uncaught exception."
+ *
+ */
+function f(obj)
+{
+  var res = [];
+
+  try
+  {
+    throw 42;
+  }
+  catch(e)
+  {
+    with(obj)
+    {
+      var e;
+      res[0] = e; // |with| binds tighter than |catch|; s/b |obj.e|
+    }
+
+    res[1] = e;   // |catch| binds tighter than function scope; s/b 42
+  }
+
+  res[2] = e;     // |var e| has function scope; s/b visible but contain |undefined|
+  return res;
+}
+
+status = inSection(2);
+actual = f({e:24});
+expect = [24, 42, undefined];
+addThis();
+
+
+
+
+//-----------------------------------------------------------------------------
+test();
+//-----------------------------------------------------------------------------
+
+
+
+function addThis()
+{
+  statusitems[UBound] = status;
+  actualvalues[UBound] = actual.toString();
+  expectedvalues[UBound] = expect.toString();
+  UBound++;
+}
+
+
+function test()
+{
+  enterFunc('test');
+  printBugNumber(BUGNUMBER);
+  printStatus(summary);
+
+  for (var i=0; i<UBound; i++)
+  {
+    reportCompare(expectedvalues[i], actualvalues[i], statusitems[i]);
+  }
+
+  exitFunc ('test');
+}