error[E0117]: only traits defined in the current crate can be implemented for primitive types --> $DIR/coherence-pair-covered-uncovered-1.rs:12:1 | LL | impl Remote1>> for i32 { } | ^^^^^^^^^^^--------------------------^^^^^--- | | | | | | | `i32` is not defined in the current crate | | `Pair` is not defined in the current crate | impl doesn't use only types from inside the current crate | = note: define and implement a trait or new type instead error: aborting due to 1 previous error For more information about this error, try `rustc --explain E0117`.