I already know Rust, and unexpected implicit refs and derefs in match/if let expressions or method calls still trip me up when writing or reading new code (espe

I already know Rust, and unexpected implicit refs and derefs in match/if let expressions or method calls still trip me up when writing or reading new code (especially now that match ergonomics can make `match &Option<T> { Some(x)` compile but not the way you expect). Nowadays I avoid higher-order generic functions like .filter(|...| ...) so don't hit unexpected &&T etc. there, but matching on Entry and regex searches still trips me up.