I have [blogged]({% post_url 2019-05-21-stacked-borrows-2.1 %}) a [few]({% post_url 2019-04-30-stacked-borrows-2 %}) times before about [Stacked Borrows](https://github.com/rust-lang/unsafe-code-guidelines/blob/master/wip/stacked-borrows.md), my proposed aliasing model for Rust.