diff -r 000000000000 -r 959103a6100f test/tools/javac/generics/odersky/Test4.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/tools/javac/generics/odersky/Test4.java	Wed Apr 27 01:34:52 2016 +0800
@@ -0,0 +1,60 @@
+/*
+ * Copyright (c) 2002, 2003, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * @test
+ * @ bug
+ * @summary Positive regression test from odersky
+ * @author odersky
+ *
+ * @compile  Test4.java
+ */
+
+class Test4 {
+    interface I {}
+    interface J {}
+    static class C implements I, J {}
+    static class D implements I, J {}
+
+    interface Ord {}
+
+    static C c = new C();
+    static D d = new D();
+
+    static <B> List<B> nil() { return new List<B>(); }
+    static <A, B extends A> A f(A x, B y) { return x; }
+    static <A, B extends A> B g(List<A> x, List<B> y) { return y.head; }
+
+    static <A> List<A> cons(A x, List<A> xs) { return xs.prepend(x); }
+    static <A> Cell<A> makeCell(A x) { return new Cell<A>(x); }
+    static <A> A id(A x) { return x; }
+
+    static Integer i = new Integer(1);
+    static Number n = i;
+
+    public static void main(String[] args) {
+        Number x = f(n, i);
+        String xy = g(cons("abc", Test4.<String>nil()), Test4.<String>nil());
+        System.out.println(g(cons("abc", nil()), nil()));
+    }
+}