error[E0277]: the trait bound `usize: Trait` is not satisfied --> $DIR/on-structs-and-enums-xc.rs:7:15 | LL | fn explode(x: Foo) {} | ^^^^^^^^^^ the trait `Trait` is not implemented for `usize` | note: required by a bound in `Foo` --> $DIR/auxiliary/on_structs_and_enums_xc.rs:5:18 | LL | pub struct Foo { | ^^^^^ required by this bound in `Foo` error[E0277]: the trait bound `f32: Trait` is not satisfied --> $DIR/on-structs-and-enums-xc.rs:10:14 | LL | fn kaboom(y: Bar) {} | ^^^^^^^^ the trait `Trait` is not implemented for `f32` | note: required by a bound in `Bar` --> $DIR/auxiliary/on_structs_and_enums_xc.rs:9:16 | LL | pub enum Bar { | ^^^^^ required by this bound in `Bar` error: aborting due to 2 previous errors For more information about this error, try `rustc --explain E0277`.