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diff --git a/Source/JavaScriptCore/tests/mozilla/js1_5/Exceptions/regress-50447.js b/Source/JavaScriptCore/tests/mozilla/js1_5/Exceptions/regress-50447.js
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+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
+*
+* 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 Communicator client code, released March
+* 31, 1998.
+*
+* 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): Rob Ginda rginda@netscape.com
+*
+* SUMMARY: New properties fileName, lineNumber have been added to Error objects
+* in SpiderMonkey. These are non-ECMA extensions and do not exist in Rhino.
+*
+* See http://bugzilla.mozilla.org/show_bug.cgi?id=50447
+*/
+//-----------------------------------------------------------------------------
+var bug = 50447;
+var summary = 'Test (non-ECMA) Error object properties fileName, lineNumber';
+
+
+//-----------------------------------------------------------------------------
+test();
+//-----------------------------------------------------------------------------
+
+
+function test()
+{
+  enterFunc ('test');
+  printBugNumber (bug);
+  printStatus (summary);
+  
+  testRealError();
+  test1();
+  test2();
+  test3();
+  test4();
+
+  exitFunc('test');
+}
+
+
+function testRealError()
+{
+    /* throw a real error, and see what it looks like */
+    enterFunc ("testRealError");
+    
+    try 
+    {
+        blabla;
+    }
+    catch (e)
+    {
+        if (e.fileName.search (/-50447\.js$/i) == -1)
+            reportFailure ("expected fileName to end with '-50447.js'");
+
+        reportCompare (61, e.lineNumber,
+                       "lineNumber property returned unexpected value.");
+    }
+    
+    exitFunc ("testRealError");
+}    
+
+
+function test1()
+{
+    /* generate an error with msg, file, and lineno properties */
+    enterFunc ("test1");
+
+    var e = new InternalError ("msg", "file", 2);
+    reportCompare ("(new InternalError(\"msg\", \"file\", 2))",
+                   e.toSource(),
+                   "toSource() returned unexpected result.");
+    reportCompare ("file", e.fileName,
+                   "fileName property returned unexpected value.");
+    reportCompare (2, e.lineNumber,
+                   "lineNumber property returned unexpected value.");
+    
+    exitFunc ("test1");
+}
+
+
+function test2()
+{
+    /* generate an error with only msg property */
+    enterFunc ("test2");
+
+    var e = new InternalError ("msg");
+    reportCompare ("(new InternalError(\"msg\", \"\"))",
+                   e.toSource(),
+                   "toSource() returned unexpected result.");
+    reportCompare ("", e.fileName,
+                   "fileName property returned unexpected value.");
+    reportCompare (0, e.lineNumber,
+                   "lineNumber property returned unexpected value.");
+    
+    exitFunc ("test2");
+}
+
+
+function test3()
+{
+    /* generate an error with only msg and lineNo properties */
+    enterFunc ("test3");
+
+    var e = new InternalError ("msg");
+    e.lineNumber = 10;
+    reportCompare ("(new InternalError(\"msg\", \"\", 10))",
+                   e.toSource(),
+                   "toSource() returned unexpected result.");
+    reportCompare ("", e.fileName,
+                   "fileName property returned unexpected value.");
+    reportCompare (10, e.lineNumber,
+                   "lineNumber property returned unexpected value.");
+    
+    exitFunc ("test3");
+}
+
+
+function test4()
+{
+    /* generate an error with only msg and filename properties */
+    enterFunc ("test4");
+
+    var e = new InternalError ("msg", "file");
+    reportCompare ("(new InternalError(\"msg\", \"file\"))",
+                   e.toSource(),
+                   "toSource() returned unexpected result.");
+    reportCompare ("file", e.fileName,
+                   "fileName property returned unexpected value.");
+    reportCompare (0, e.lineNumber,
+                   "lineNumber property returned unexpected value.");
+    
+    exitFunc ("test4");
+}