https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65707
Andrew Pinski <pinskia at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Keywords| |ice-on-valid-code Last reconfirmed|2015-04-09 00:00:00 |2016-1-24 --- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> --- Changing: always_true<T>{} to always_true<T>::value Allows it to compile. That is the conversion operator is causing the ICE.