Compilare: warning: unused `Result` that must be used --> main.rs:158:9 | 158 | reader.read_line(&mut line); //.expect("Unable to read line"); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^ | = note: this `Result` may be an `Err` variant, which should be handled = note: `#[warn(unused_must_use)]` on by default help: use `let _ = ...` to ignore the resulting value | 158 | let _ = reader.read_line(&mut line); //.expect("Unable to read line"); | +++++++ warning: 1 warning emitted