The ForwardingMethodExpression equals() implementation is incorrect

 
@Override
public boolean equals(Object obj) {
//my fix
     if (obj !=null && obj instanceof ForwardingMethodExpression){
    		obj=((ForwardingMethodExpression)obj).delegate();
    	}
//my fix end
     return this == obj || delegate().equals(obj);
}

 
public void subscribeToEvent(Class<? extends SystemEvent> eventClass,
       ComponentSystemEventListener componentListener) {
...
    if (!listenersForEventClass.contains(facesLifecycleListener)) { // see here
        listenersForEventClass.add(facesLifecycleListener);
    }

}