You can't compare &mut i32 with &i32, but you can compare &i32 with &mut i32

[Duddino]

https://play.rust-lang.org/?version=nightly&mode=debug&edition=2018&gist=11d3a2fe6f9ec8544d3f64917b99f913

[Centril]

Maybe this can be fixed by adding another impl? Not sure if this is typeck's fault or the lack of an impl...

[ecstatic-morse]

Both impls already exist for PartialEq but not PartialOrd.

[Duddino]

I can try adding impl for PartialOrd (as soon as I get back home) and if it fixes this I will make a PR

[inquisitivecrystal]

Per #87328, it looks like this can't be solved backwards compatibly. I think a fix might require a change to the coercion rules. In any case, closing this issue.