https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98639
--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> --- (In reply to Arthur O'Dwyer from comment #0) > I actually suspect that this behavior is related to C++20's paren-init for > aggregates; Yes, and the change to allow aggregates to have base classes. Derived(b) initializes the base class from b. > it might even be conforming? It is. > But there's no way this behavior > was *intentional.* A value of type Base shouldn't be castable to Derived. Some people seem to think otherwise. https://twitter.com/wakomeup/status/1274778577087627267
