Compilare: warning: value assigned to `j` is never read --> main.rs:79:9 | 79 | j += 1; | ^ | = note: `#[warn(unused_assignments)]` on by default = help: maybe it is overwritten before being read? warning: variable does not need to be mutable --> main.rs:60:13 | 60 | let mut bytes = lines.next().unwrap().as_bytes(); | ----^^^^^ | | | help: remove this `mut` | = note: `#[warn(unused_mut)]` on by default warning: 2 warnings emitted