[Bug libstdc++/80064] [7 Regression] _Iter_cmp_iter instantiates bogus type

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80064

--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
https://github.com/cython/cython/issues/1632