diff -r fd16c54261b3 -r 90ce3da70b43 jdk/test/java/lang/instrument/NullTransformerAddTest.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/test/java/lang/instrument/NullTransformerAddTest.java	Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,80 @@
+/*
+ * Copyright 2003-2004 Sun Microsystems, Inc.  All Rights Reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ */
+
+/**
+ * @test
+ * @bug 4882798
+ * @summary make sure addTransformer(null) throws what it should
+ * @author Gabriel Adauto, Wily Technology
+ *
+ * @run build NullTransformerAddTest
+ * @run shell MakeJAR.sh redefineAgent
+ * @run main/othervm -javaagent:redefineAgent.jar NullTransformerAddTest NullTransformerAddTest
+ */
+public class
+NullTransformerAddTest
+    extends ATransformerManagementTestCase
+{
+
+    /**
+     * Constructor for NullTransformerAddTest.
+     * @param name
+     */
+    public NullTransformerAddTest(String name)
+    {
+        super(name);
+    }
+
+    public static void
+    main (String[] args)
+        throws Throwable {
+        ATestCaseScaffold   test = new NullTransformerAddTest(args[0]);
+        test.runTest();
+    }
+
+    protected final void
+    doRunTest()
+        throws Throwable {
+        testNullTransformerAdd();
+    }
+
+
+    /**
+     * Add null transformers to the the manager and check it
+     */
+    public void
+    testNullTransformerAdd()
+    {
+        boolean caughtIt = false;
+        try
+            {
+            addTransformerToManager(fInst, null);
+            }
+        catch (NullPointerException npe)
+            {
+            caughtIt = true;
+            }
+        assertTrue(caughtIt);
+    }
+
+}