Updated from version 5.2.11 to 5.2.14

Startup now yields the following error:

Caused by: javax.persistence.PersistenceException: [PersistenceUnit: .....] Unable to build Hibernate SessionFactory
at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.persistenceException(EntityManagerFactoryBuilderImpl.java:970)
at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.build(EntityManagerFactoryBuilderImpl.java:895)
at org.hibernate.jpa.HibernatePersistenceProvider.createEntityManagerFactory(HibernatePersistenceProvider.java:58)
at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:55)
...
Caused by: org.hibernate.MappingException: Could not instantiate persister org.hibernate.persister.entity.JoinedSubclassEntityPersister
at org.hibernate.persister.internal.PersisterFactoryImpl.createEntityPersister(PersisterFactoryImpl.java:112)
at org.hibernate.persister.internal.PersisterFactoryImpl.createEntityPersister(PersisterFactoryImpl.java:77)
at org.hibernate.metamodel.internal.MetamodelImpl.initialize(MetamodelImpl.java:128)
at org.hibernate.internal.SessionFactoryImpl.<init>(SessionFactoryImpl.java:300)
at org.hibernate.boot.internal.SessionFactoryBuilderImpl.build(SessionFactoryBuilderImpl.java:460)
at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.build(EntityManagerFactoryBuilderImpl.java:892)

After several hours of searching, I somewhat found the error.

If an EntityA has a member variable like

Set<EntityB> attributes

where EntityB inherits from some BaseEntity, the error is generated.
As soon as I change the name "attributes" to something else, or
remove the inheritance from EntityB, the issue seems to be fixed.

A minimal example would look something like this:

@Entity
@Inheritance(strategy=InheritanceType.JOINED)	// or other
public class BaseEntity {
	@Id
	private long id;
}

@Entity
public class EntityA extends BaseEntity {
	@OneToMany(fetch=FetchType.LAZY)
	private Set<EntityB> attributes;			// attributes as name seems to yield the error
}

@Entity
public class EntityB {
	@Id
	private long id;
}

However, while the minimal example did not trigger the error,
All other combinations with various of my classes reproduced the error,
when above two conditions were met.
So there seem to be some additional requirements to trigger the error, I could not yet determine.