rust/src/test/ui/coherence/coherence-impl-trait-for-marker-trait-positive.stderr

error[E0371]: the object type `(dyn Object + Marker2 + 'static)` automatically implements the trait `Marker1`
  --> $DIR/coherence-impl-trait-for-marker-trait-positive.rs:14:1
   |
LL | impl Marker1 for dyn Object + Marker2 { }   //~ ERROR E0371
   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ `(dyn Object + Marker2 + 'static)` automatically implements trait `Marker1`

error[E0371]: the object type `(dyn Object + Marker2 + 'static)` automatically implements the trait `Marker2`
  --> $DIR/coherence-impl-trait-for-marker-trait-positive.rs:16:1
   |
LL | impl Marker2 for dyn Object + Marker2 { }   //~ ERROR E0371
   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ `(dyn Object + Marker2 + 'static)` automatically implements trait `Marker2`

error[E0117]: only traits defined in the current crate can be implemented for arbitrary types
  --> $DIR/coherence-impl-trait-for-marker-trait-positive.rs:22:1
   |
LL | unsafe impl Send for dyn Marker2 {} //~ ERROR E0117
   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ 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[E0321]: cross-crate traits with a default impl, like `std::marker::Send`, can only be implemented for a struct/enum type, not `(dyn Object + 'static)`
  --> $DIR/coherence-impl-trait-for-marker-trait-positive.rs:26:1
   |
LL | unsafe impl Send for dyn Object {} //~ ERROR E0321
   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ can't implement cross-crate trait with a default impl for non-struct/enum type

error[E0321]: cross-crate traits with a default impl, like `std::marker::Send`, can only be implemented for a struct/enum type, not `(dyn Object + Marker2 + 'static)`
  --> $DIR/coherence-impl-trait-for-marker-trait-positive.rs:27:1
   |
LL | unsafe impl Send for dyn Object + Marker2 {} //~ ERROR E0321
   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ can't implement cross-crate trait with a default impl for non-struct/enum type

error: aborting due to 5 previous errors

Some errors occurred: E0117, E0321, E0371.
For more information about an error, try `rustc --explain E0117`.
forbid manually impl'ing one of an object type's marker traits This shouldn't break compatibility for crates that do not use `feature(optin_builtin_traits)`, because as the test shows, it is only possible to impl a marker trait for a trait object in the crate the marker trait is defined in, which must define `feature(optin_builtin_traits)`. Fixes #56934 2019-01-05 08:19:34 -06:00			error[E0371]: the object type `(dyn Object + Marker2 + 'static)` automatically implements the trait `Marker1`
			`--> $DIR/coherence-impl-trait-for-marker-trait-positive.rs:14:1`
			`\|`
			`LL \| impl Marker1 for dyn Object + Marker2 { } //~ ERROR E0371`
			\| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ `(dyn Object + Marker2 + 'static)` automatically implements trait `Marker1`

			error[E0371]: the object type `(dyn Object + Marker2 + 'static)` automatically implements the trait `Marker2`
			`--> $DIR/coherence-impl-trait-for-marker-trait-positive.rs:16:1`
			`\|`
			`LL \| impl Marker2 for dyn Object + Marker2 { } //~ ERROR E0371`
			\| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ `(dyn Object + Marker2 + 'static)` automatically implements trait `Marker2`

			`error[E0117]: only traits defined in the current crate can be implemented for arbitrary types`
			`--> $DIR/coherence-impl-trait-for-marker-trait-positive.rs:22:1`
			`\|`
			`LL \| unsafe impl Send for dyn Marker2 {} //~ ERROR E0117`
			`\| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ impl doesn't use types inside crate`
			`\|`
fix test output changing in rebase 2019-01-14 16:26:50 -06:00			`= note: the impl does not reference only types defined in this crate`
forbid manually impl'ing one of an object type's marker traits This shouldn't break compatibility for crates that do not use `feature(optin_builtin_traits)`, because as the test shows, it is only possible to impl a marker trait for a trait object in the crate the marker trait is defined in, which must define `feature(optin_builtin_traits)`. Fixes #56934 2019-01-05 08:19:34 -06:00			`= note: define and implement a trait or new type instead`

			error[E0321]: cross-crate traits with a default impl, like `std::marker::Send`, can only be implemented for a struct/enum type, not `(dyn Object + 'static)`
			`--> $DIR/coherence-impl-trait-for-marker-trait-positive.rs:26:1`
			`\|`
			`LL \| unsafe impl Send for dyn Object {} //~ ERROR E0321`
			`\| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ can't implement cross-crate trait with a default impl for non-struct/enum type`

			error[E0321]: cross-crate traits with a default impl, like `std::marker::Send`, can only be implemented for a struct/enum type, not `(dyn Object + Marker2 + 'static)`
			`--> $DIR/coherence-impl-trait-for-marker-trait-positive.rs:27:1`
			`\|`
			`LL \| unsafe impl Send for dyn Object + Marker2 {} //~ ERROR E0321`
			`\| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ can't implement cross-crate trait with a default impl for non-struct/enum type`

			`error: aborting due to 5 previous errors`

			`Some errors occurred: E0117, E0321, E0371.`
			For more information about an error, try `rustc --explain E0117`.