Compilare: warning: unreachable statement --> main.rs:297:5 | 295 | return; | ------ any code following this expression is unreachable 296 | 297 | / let mut results: Vec<(usize, usize)> = cats 298 | | .iter() 299 | | .rev() 300 | | .map(|c| { ... | 321 | | }) 322 | | .collect(); | |___________________^ unreachable statement | = note: `#[warn(unreachable_code)]` on by default warning: unused variable: `left_arb` --> main.rs:274:13 | 274 | let mut left_arb = Subtree::new(n, 0); | ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_left_arb` | = note: `#[warn(unused_variables)]` on by default warning: unused variable: `right_arb` --> main.rs:275:13 | 275 | let mut right_arb = Subtree::new(n, 0); | ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_right_arb` warning: variable does not need to be mutable --> main.rs:274:9 | 274 | let mut left_arb = Subtree::new(n, 0); | ----^^^^^^^^ | | | help: remove this `mut` | = note: `#[warn(unused_mut)]` on by default warning: variable does not need to be mutable --> main.rs:275:9 | 275 | let mut right_arb = Subtree::new(n, 0); | ----^^^^^^^^^ | | | help: remove this `mut` warning: 5 warnings emitted