> What edition 2018 has right now is migrate mode NLL which emits an error if either NLL borrowck or AST borrowck think there is an issue with your code. If th

> What edition 2018 has right now is migrate mode NLL which emits an error if either NLL borrowck or AST borrowck think there is an issue with your code. If that were true, then this example would fail to compile, since it fails with the old AST borrowck: https://play.rust-lang.org/?version=stable&mode=debug&edition=2018&gist=66e745314774b90573159d2f2c2c4850 https://play.rust-lang.org/?version=stable&mode=debug&editio... See: https://rust-lang-nursery.github.io/edition-guide/rust-2018/ownership-and-lifetimes/non-lexical-lifetimes.html https://rust-lang-nursery.github.io/edition-guide/rust-2018/...