diff -r 000000000000 -r 9a66ca7c79fa test/tools/javac/generics/InterfaceCast1.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/tools/javac/generics/InterfaceCast1.java	Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,55 @@
+/*
+ * Copyright 2001-2004 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 4453032
+ * @summary overridden interface method causes the compiler to reject cast
+ * @author gafter
+ *
+ * @compile -source 1.5 InterfaceCast1.java
+ */
+
+public class InterfaceCast1 {
+    public static void main(String[] args) throws Exception {
+    }
+}
+
+interface Collection<E> {
+    <T> T[] toArray(T[] a);
+}
+
+interface Set<E> extends Collection<E> {
+    <T> T[] toArray(T[] a);
+}
+
+interface SortedSet<E> extends Set<E> {
+}
+
+class TreeSet<E> {
+    public void addAll(Collection<E> c) {
+        if (c instanceof SortedSet) {
+            SortedSet<E> ss = (SortedSet<E>) c;
+        }
+    }
+}