The program below fails at runtime with this error:

Exception in thread "main" java.lang.IllegalAccessException: Class refl.ClientTest can not access a member of class refl.a.Base with modifiers "public"
        at sun.reflect.Reflection.ensureMemberAccess(Reflection.java:65)
        at java.lang.reflect.Method.invoke(Method.java:578)
        at refl.ClientTest.main(ClientTest.java:9)

========== test/refl/a/Base.java ==========
     1 package refl.a;
     2
     3 class Base {
     4 public void f() {
     5 System.out.println("Hello, world!");
     6 }
     7 }
========== test/refl/a/Pub.java ==========
     1 package refl.a;
     2
     3 public class Pub extends Base {}
========== test/refl/ClientTest.java ==========
     1 package refl;
     2 import refl.a.*;
     3 import java.lang.reflect.*;
     4
     5 public class ClientTest {
     6 public static void main(String[] args) throws Exception {
     7 Pub p = new Pub();
     8 Method m = Pub.class.getMethod("f");
     9 m.invoke(p);
    10 }
    11 }