error[E0119]: conflicting implementations of trait `std::marker::Copy` for type `i32`: --> $DIR/coherence-impls-copy.rs:8:1 | LL | impl Copy for i32 {} | ^^^^^^^^^^^^^^^^^ | = note: conflicting implementation in crate `core`: - impl std::marker::Copy for i32; error[E0119]: conflicting implementations of trait `std::marker::Copy` for type `&NotSync`: --> $DIR/coherence-impls-copy.rs:37:1 | LL | impl Copy for &'static NotSync {} | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ | = note: conflicting implementation in crate `core`: - impl std::marker::Copy for &T where T: ?Sized; error[E0119]: conflicting implementations of trait `std::marker::Copy` for type `&[NotSync]`: --> $DIR/coherence-impls-copy.rs:45:1 | LL | impl Copy for &'static [NotSync] {} | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ | = note: conflicting implementation in crate `core`: - impl std::marker::Copy for &T where T: ?Sized; error[E0206]: the trait `Copy` may not be implemented for this type --> $DIR/coherence-impls-copy.rs:27:15 | LL | impl Copy for &'static mut MyType {} | ^^^^^^^^^^^^^^^^^^^ type is not a structure or enumeration error[E0206]: the trait `Copy` may not be implemented for this type --> $DIR/coherence-impls-copy.rs:32:15 | LL | impl Copy for (MyType, MyType) {} | ^^^^^^^^^^^^^^^^ type is not a structure or enumeration error[E0206]: the trait `Copy` may not be implemented for this type --> $DIR/coherence-impls-copy.rs:40:15 | LL | impl Copy for [MyType] {} | ^^^^^^^^ type is not a structure or enumeration error[E0117]: only traits defined in the current crate can be implemented for arbitrary types --> $DIR/coherence-impls-copy.rs:8:1 | LL | impl Copy for i32 {} | ^^^^^^^^^^^^^^^^^ impl doesn't use types inside crate | = note: the impl does not reference only types defined in this crate = note: define and implement a trait or new type instead error[E0117]: only traits defined in the current crate can be implemented for arbitrary types --> $DIR/coherence-impls-copy.rs:32:1 | LL | impl Copy for (MyType, MyType) {} | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ impl doesn't use types inside crate | = note: the impl does not reference only types defined in this crate = note: define and implement a trait or new type instead error[E0117]: only traits defined in the current crate can be implemented for arbitrary types --> $DIR/coherence-impls-copy.rs:40:1 | LL | impl Copy for [MyType] {} | ^^^^^^^^^^^^^^^^^^^^^^ impl doesn't use types inside crate | = note: the impl does not reference only types defined in this crate = note: define and implement a trait or new type instead error[E0117]: only traits defined in the current crate can be implemented for arbitrary types --> $DIR/coherence-impls-copy.rs:45:1 | LL | impl Copy for &'static [NotSync] {} | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ impl doesn't use types inside crate | = note: the impl does not reference only types defined in this crate = note: define and implement a trait or new type instead error: aborting due to 10 previous errors Some errors have detailed explanations: E0117, E0119, E0206. For more information about an error, try `rustc --explain E0117`.