warning: unused `Result` that must be used --> tc-cli/src/main.rs:212:3 | 212 | std::io::stdout().flush(); | ^^^^^^^^^^^^^^^^^^^^^^^^^ | = 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 | 212 | let _ = std::io::stdout().flush(); | +++++++