error: called `map(f)` on an `Option` value where `f` is a closure that returns the unit type `()` --> fir/src/iter/tree_like.rs:199:9 | 199 | / fir.nodes 200 | | .last_key_value() 201 | | .map(|last| self.visit(fir, last.0)); | |________________________________________________^ | = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#option_map_unit_fn = note: `-D clippy::option-map-unit-fn` implied by `-D warnings` = help: to override `-D warnings` add `#[allow(clippy::option_map_unit_fn)]` help: try | 199 ~ if let Some(last) = fir.nodes 200 + .last_key_value() { self.visit(fir, last.0) } |

Process completed with exit code 101.