`cargo test --all-targets` fails

[warren2k]

At least, it fails with toolchain version 1.72.1

[Philippe-Cholet]

On rust 1.72.0 (stable), thread 'main' panicked at 'attempt to add with overflow', benches\bench1.rs:584:19

fn kmerge_tenway(c: &mut Criterion) {
    let mut data = vec![0; 10240];
    let mut state = 1729u16;
    fn rng(state: &mut u16) -> u16 {
        let new = state.wrapping_mul(31421) + 6927; // <----
        *state = new;
        new
    }
    for elt in &mut data {
        *elt = rng(&mut state);
    }
    // ...

That seems to be quite old code. Investigating further...

[warren2k]

Looking further into this, it seems there's no attempt to run this in CI. Maybe this is not an issue.

[Philippe-Cholet]

It was added in #101 (feb. 2016... ...): https://github.com/rust-itertools/itertools/pull/101/files#diff-5e88c455e47e41d2006104fe8795309466144a7dc0b25f98632e7b85ec90b866R674
I ran cargo test --bench bench1 on old commits (like a year ago and more) and got the same error.
That's definitely weird, good catch anyway.

[Philippe-Cholet]

Running the associated bench cargo bench "kmerge tenway" is fine though. I don't understand.

...Oh... bench uses release profile so it's silently ignored: wrapping_add would fix this I guess.
EDIT: It does.