[Bug libstdc++/122224] std::prev when called with non-bidirectional iterators

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=122224

--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
A more compelling argument for it compiling is that something like
views::iota(0,1).begin() returns a Cpp17InputIterator, but it models
std::random_access_iterator so it should be fine to do:

std::prev(std::next(views::iota(0,1).begin()))

and indeed this works correctly with GCC 16.