warning: this returns a `Result<_, ()>` --> src/riot-rs-rt/src/lib.rs:40:13 | 40 | pub fn benchmark<F: Fn()>(_iterations: usize, _f: F) -> core::result::Result<usize, ()> { | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ | = help: use a custom `Error` type instead = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#result_unit_err = note: `#[warn(clippy::result_unit_err)]` on by default