The java.lang.reflect.AccessibleObject.setAccessible() method appears to be
broken in merlin promoted build B42 (B41 works properly):

  $ which java
  java is /jini/files/jdk/promoted/1.4/B42/build/sparc/bin/java
  $ cat Bar.java
  import java.lang.reflect.*;
  
  class Gub {
      private void func() { System.out.println("func called"); }
  }
  
  public class Bar {
      public static void main(String[] args) throws Exception {
          Method meth = Gub.class.getDeclaredMethod("func", new Class[0]);
          meth.setAccessible(true);
          meth.invoke(new Gub(), new Object[0]);
      }
  }
  $ javac Bar.java
  $ java Bar
  Exception in thread "main" java.lang.IllegalAccessException
          at java.lang.reflect.Method.invoke(Native Method)
          at Bar.main(Bar.java:11)
  $ setjdk 1.4-B41
  $ which java
  java is /jini/files/jdk/promoted/1.4/B41/build/sparc/bin/java
  $ java Bar
  func called
  $

The same error occurs for Field objects:

  $ which java
  java is /jini/files/jdk/promoted/1.4/B42/build/sparc/bin/java
  $ cat Foo.java
  import java.lang.reflect.*;
  
  class Baz {
      private int i;
  }
  
  public class Foo {
      public static void main(String[] args) throws Exception {
          Field f = Baz.class.getDeclaredField("i");
          f.setAccessible(true);
          f.getInt(new Baz());
      }
  }
  $ javac Foo.java
  $ java Foo
  Exception in thread "main" java.lang.IllegalAccessException
          at java.lang.reflect.Field.getInt(Native Method)
          at Foo.main(Foo.java:11)
  $ setjdk 1.4-B41
  $ java Foo
  $