FULL PRODUCT VERSION :
java version "1.6.0-rc"
Java(TM) SE Runtime Environment (build 1.6.0-rc-b91)
Java HotSpot(TM) Client VM (build 1.6.0-rc-b91, mixed mode, sharing)

A DESCRIPTION OF THE PROBLEM :
When a class A has a generic field with a private class P as parameter, and another class Main without access to P uses this field, generics may insert a casts to P in Main, to which it has no access. This results in an IllegalAccessError.
This may actually be a bug in the specification, I'm not sure.

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Compile and run the provided code.

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
The compiler shouldn't accept such code.
ACTUAL -
java.lang.IllegalAccessError: tried to access class a.A$P from class Main

REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
Main.java:
public class Main {
public static void main(String[] args) {
a.A myA = new a.A();
myA.p = myA.vec.get(0);
}
}

a/A.java:
package a;
import java.util.Vector;
public class A {
private class P {}
public P p;
public Vector<P> vec;
public A() {
vec = new Vector<P>();
vec.add(new P());
}
}
---------- END SOURCE ----------