https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64077
--- Comment #5 from Daniel Krügler <daniel.kruegler at googlemail dot com> --- (In reply to Andrew Dixie from comment #4) > If the 'accessible' in p5 includes friendships relationships, then the > dynamic_cast should succeed. Yes, friendship relations need to be considered when accessibility is tested. > If the 'accessible' in p5 requires a public base (like is required by p8), > then the dynamic cast should fail (or be ill-formed). > I think the wording of the standard clearly specifies succeed. Yes.