error[E0277]: the trait bound `cross_crate::NonConst: ~const cross_crate::MyTrait` is not satisfied --> $DIR/cross-crate.rs:19:14 | LL | NonConst.func(); | ^^^^ the trait `cross_crate::MyTrait` is not implemented for `cross_crate::NonConst` | note: required by a bound in `func` --> $DIR/auxiliary/cross-crate.rs:5:1 | LL | #[const_trait] | ^^^^^^^^^^^^^^ required by this bound in `MyTrait::func` ... LL | fn func(self); | ---- required by a bound in this associated function help: consider introducing a `where` clause, but there might be an alternative better way to express this requirement | LL | const fn const_context() where cross_crate::NonConst: cross_crate::MyTrait { | +++++++++++++++++++++++++++++++++++++++++++++++++ error: aborting due to 1 previous error For more information about this error, try `rustc --explain E0277`.