package private methods do not override across package boundary

The following test case exposes a failure also detected by jacks test 8.1.1.1-default-abstract-9

==================== Tryit.java ====================
     1 /*
     2 * @test %W% %E%
     3 * @bug 4686811
     4 * @summary package private methods do not override across package boundary
     5 * @author gafter
     6 *
     7 * @compile p1/A.java p1/C.java p2/B.java
     8 */
==================== p1/A.java ====================
     1 package p1;
     2
     3 public abstract class A {
     4 abstract void f();
     5 }
==================== p1/C.java ====================
     1 package p1;
     2 public abstract class C extends p2.B {
     3 void f() {} // overrides noninherited A.f()
     4 }
==================== p2/B.java ====================
     1 package p2;
     2
     3 public abstract class B extends p1.A {
     4 }
     5
     6 class D extends p1.C {
     7 }