https://gcc.gnu.org/bugzilla/show_bug.cgi?id=55004 Bug 55004 depends on bug 83144, which changed state.
Bug 83144 Summary: ICE using trailing return type and constexpr with GCC 7.X https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83144 What |Removed |Added ---------------------------------------------------------------------------- Status|ASSIGNED |RESOLVED Resolution|--- |FIXED
