error: called `map_or(None, f)` on an Option value. This can be done more directly by calling `and_then(f)` instead --> $DIR/option_map_or_none.rs:8:13 | LL | let _ = opt.map_or(None, |x| Some(x + 1)); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try using and_then instead: `opt.and_then(|x| Some(x + 1))` | = note: `-D clippy::option-map-or-none` implied by `-D warnings` error: called `map_or(None, f)` on an Option value. This can be done more directly by calling `and_then(f)` instead --> $DIR/option_map_or_none.rs:11:13 | LL | let _ = opt.map_or(None, |x| { | _____________^ LL | | Some(x + 1) LL | | }); | |_________________________^ help: try using and_then instead | LL | let _ = opt.and_then(|x| { LL | Some(x + 1) LL | }); | error: aborting due to 2 previous errors