error[E0369]: binary operation `==` cannot be applied to type `A` --> $DIR/issue-62375.rs:7:7 | LL | a == A::Value; | - ^^ -------- fn(()) -> A {A::Value} | | | A | note: an implementation of `PartialEq A {A::Value}>` might be missing for `A` --> $DIR/issue-62375.rs:1:1 | LL | enum A { | ^^^^^^ must implement `PartialEq A {A::Value}>` help: consider annotating `A` with `#[derive(PartialEq)]` | LL + #[derive(PartialEq)] LL | enum A { | help: use parentheses to construct this tuple variant | LL | a == A::Value(/* () */); | ++++++++++ error: aborting due to 1 previous error For more information about this error, try `rustc --explain E0369`.