If I define a producer with an injection point for buil-in bean InjectionPoint like this :

@Produces
@Named
public OAuthSession getCurrentSession(InjectionPoint ip) {…}

And I call #{currentSession} in JSF or JSP page, I get an exception

WELD-000009: Dynamic lookup of Implicit Bean [javax.enterprise.inject.spi.InjectionPoint] with qualifiers [@Default] is not supported

thrown by InjectionPointBean.getInjectionPoint() method.
In Weld 1.x I had a null value injected in my InjectionPoint.

According to the CDI 1.1 spec : "6.5.3. Contextual reference for a bean", the correct behavior should be the Weld 1.x one : returning a null InjectionPoint.