Pretty sure they discussed this change on Reddit (https://www.reddit.com/r/rust/comments/ix751t/my_least_favorite_rust_type/ https://www.reddit.com/r/rust/comme

Pretty sure they discussed this change on Reddit (https://www.reddit.com/r/rust/comments/ix751t/my_least_favorite_rust_type/ https://www.reddit.com/r/rust/comments/ix751t/my_least_favor...): Here is the discussion > In 2021 edition the compiler team could change the meaning of (3..5) to resolve to a new type. Then if you wanted the old type you have to request it by a fully qualified name or something. And the responses was: > That would be pretty awful. I think it would be better to change IntoIterator and warn for differences in copy and intoiterator in both editions so you can write portable code.