https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79687
--- Comment #19 from Volker Reichelt <reichelt at gcc dot gnu.org> --- No, that's again invalid. The second operand of .* or .-> must point to a valid class member, otherwise you'll get undefined behavior. The only way to achieve this in this class with a single member is to initialize it with &A::c (or a copy of this value).
