diff -r 000000000000 -r 9a66ca7c79fa test/tools/javac/mixedTarget/ExtendCovariant1.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/tools/javac/mixedTarget/ExtendCovariant1.java	Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,47 @@
+/*
+ * Copyright 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 5009712
+ * @summary 1.4 javac should not accept the Covariant Return Type
+ * @author gafter
+ *
+ * @compile -source 1.4 ExtendCovariant1.java
+ */
+
+/**
+ * java.io.PrintStream java.io.PrintStream.append(char)
+ *
+ * overrides
+ *
+ * java.lang.Appendable java.lang.Appendable.append(char)
+ *
+ * Yet javac should allow extending PrintStream, as long as the user
+ * doesn't directly override a covariant method in -source 1.4.
+ **/
+public class ExtendCovariant1 extends java.io.PrintStream {
+    ExtendCovariant1() throws java.io.IOException {
+        super("");
+    }
+}