error[E0277]: can't compare `Comparable` with `Comparable` --> $DIR/issue-34229.rs:2:46 | LL | #[derive(PartialEq, PartialOrd)] struct Nope(Comparable); | ---------- ^^^^^^^^^^ no implementation for `Comparable < Comparable` and `Comparable > Comparable` | | | in this derive macro expansion | = help: the trait `PartialOrd` is not implemented for `Comparable` = note: this error originates in the derive macro `PartialOrd` (in Nightly builds, run with -Z macro-backtrace for more info) help: consider annotating `Comparable` with `#[derive(PartialOrd)]` | LL | #[derive(PartialEq)] #[derive(PartialOrd)] | +++++++++++++++++++++ error: aborting due to 1 previous error For more information about this error, try `rustc --explain E0277`.