https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78022
Andrew Pinski <pinskia at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Keywords| |rejects-valid Status|UNCONFIRMED |NEW Last reconfirmed| |2016-10-19 Summary|Strange C++ compilation |constexpr int template |error |rejected unless constructor | |is used before hand Ever confirmed|0 |1 Known to fail| |5.3.0, 5.4.0, 7.0 --- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> --- Confirmed. struct X can be a function too.