https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70147
--- Comment #20 from Jason Merrill <jason at gcc dot gnu.org> --- (In reply to Jakub Jelinek from comment #16) > I am really concerned about the rest of the base object, because > the constructor is only called once, and only in the in_charge > ctor. I don't think that's a problem; the clobber only affects the as-base size of the class, which doesn't include any virtual bases unless they are primary, and virtual bases with data can't be primary.