[Bug libstdc++/85965] [8 Regression] G++ gives cryptic error instead of incomplete type

[hedayat.fwd at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85965

--- Comment #10 from Hedayat Vatankhah <hedayat.fwd at gmail dot com> ---
Isn't it expected to be fixed in Gcc 9.1.1? It seems to still affect GCC 9.1.1
(Fedora 30)