https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105901
Andrew Pinski <pinskia at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |RESOLVED Resolution|--- |DUPLICATE --- Comment #6 from Andrew Pinski <pinskia at gcc dot gnu.org> --- Yes changing: PrintableImpl(T x_) : x{x_} {__builtin_fprintf(stderr,"%s\n", __PRETTY_FUNCTION__);} To: PrintableImpl(T x_) : x(x_) {__builtin_fprintf(stderr,"%s\n", __PRETTY_FUNCTION__);} Works. That is in the original code: PrintableImpl(T x) : x{std::move(x)} {} to: PrintableImpl(T x) : x(std::move(x)) {} So yes this is a dup of bug 85577. This is https://wg21.link/cwg2137 . *** This bug has been marked as a duplicate of bug 85577 ***