https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64867
--- Comment #9 from Tom Tromey <tromey at gcc dot gnu.org> --- > Are you sure that class is not trivial which is why gcc is not warning about > it? C++11 does not really have pod and non-pod any more but rather trivial > and non-trivial and the rules has chnaged with respect of constructures. I hesitate to say I'm sure :) However my belief is that because this class has a user-provided default constructor, it is not trivial. I tested this by adding "#include <type_traits>" and then static_assert(!std::is_trivial<ConstUTF8CharsZ>::value, "whoops"); Trivial or not, I'd like to get a warning here. In firefox varargs is really only used for printf-like things; but for various reasons there are some custom implementations which can't be marked with the "printf" attribute. So while doing a refactoring it turned out I inadvertently changed code to pass objects rather than char* to one of these ... but finding the problem locations is proving to be rather difficult.
