Bad access to protected data

[taha ghasemi]

Hi all,

I've recently upgraded from 1.1.8 to 1.2.0 but got this exception during proxy 
generation:

java.lang.VerifyError: (class: 
co/pishfa/security/db/UserRepository$$OwbInterceptProxy0, method: entityManager 
signature: ()Ljavax/persistence/EntityManager;) Bad access to protected data

The structure of my classes is this:

package co.pishfa.db
class AbstractJpaRepository {
    protected EntityManager entityManager() { return ...}

}

package co/pishfa/security/db
class UserRepository extends AbstractJpaRepository {
}

Do you have any idea?

Thanks