https://gcc.gnu.org/bugzilla/show_bug.cgi?id=122224
--- Comment #5 from M Welinder <terra at gnome dot org> --- > std::prev(it, n) is equivalent to std::advance(it, -n) Is integer overflow for the negation an issue? There doesn't seem to be much help in the standard, although https://en.cppreference.com/w/cpp/named_req/RandomAccessIterator.html (for "r -= n") shows that at some point this was considered in that context. Aside: much of the iterator part of the standard feels a bit like a work in progress. E.g., someone forgot to require that the Distance argument for std::advance should be integral. Or even arithmetic.
