https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65656
Richard Biener <rguenth at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |NEW Last reconfirmed| |2015-04-02 Ever confirmed|0 |1 Known to fail| |5.0 --- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> --- If it's arg is a constexpr then it should return true and if not, false. Confirmed.