https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83830
--- Comment #1 from Daniel Krügler <daniel.kruegler at googlemail dot com> --- Looks like an oversight on my side when I implemented http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2017/p0607r0.html for gcc.
