Compilare: warning: unused variable: `n` --> main.rs:144:9 | 144 | let n = sf.next_u32().unwrap(); | ^ help: if this is intentional, prefix it with an underscore: `_n` | = note: `#[warn(unused_variables)]` on by default warning: struct `Index` is never constructed --> main.rs:74:8 | 74 | struct Index { | ^^^^^ | = note: `#[warn(dead_code)]` on by default warning: 2 warnings emitted