| warning: the feature `non_lifetime_binders` is incomplete and may not be safe to use and/or cause compiler crashes |
| --> $DIR/supertrait-object-safety.rs:1:12 |
| | |
| LL | #![feature(non_lifetime_binders)] |
| | ^^^^^^^^^^^^^^^^^^^^ |
| | |
| = note: see issue #108185 <https://github.com/rust-lang/rust/issues/108185> for more information |
| = note: `#[warn(incomplete_features)]` on by default |
| |
| error[E0038]: the trait `Foo` cannot be made into an object |
| --> $DIR/supertrait-object-safety.rs:19:23 |
| | |
| LL | let x: &dyn Foo = &(); |
| | ^^^ `Foo` cannot be made into an object |
| | |
| note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit <https://doc.rust-lang.org/reference/items/traits.html#object-safety> |
| --> $DIR/supertrait-object-safety.rs:4:12 |
| | |
| LL | trait Foo: for<T> Bar<T> {} |
| | --- ^^^^^^^^^^^^^ ...because where clause cannot reference non-lifetime `for<...>` variables |
| | | |
| | this trait cannot be made into an object... |
| = help: only type `()` implements the trait, consider using it directly instead |
| = note: required for the cast from `&()` to `&dyn Foo` |
| |
| error[E0038]: the trait `Foo` cannot be made into an object |
| --> $DIR/supertrait-object-safety.rs:19:12 |
| | |
| LL | let x: &dyn Foo = &(); |
| | ^^^^^^^^ `Foo` cannot be made into an object |
| | |
| note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit <https://doc.rust-lang.org/reference/items/traits.html#object-safety> |
| --> $DIR/supertrait-object-safety.rs:4:12 |
| | |
| LL | trait Foo: for<T> Bar<T> {} |
| | --- ^^^^^^^^^^^^^ ...because where clause cannot reference non-lifetime `for<...>` variables |
| | | |
| | this trait cannot be made into an object... |
| = help: only type `()` implements the trait, consider using it directly instead |
| |
| error[E0038]: the trait `Foo` cannot be made into an object |
| --> $DIR/supertrait-object-safety.rs:22:5 |
| | |
| LL | needs_bar(x); |
| | ^^^^^^^^^ `Foo` cannot be made into an object |
| | |
| note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit <https://doc.rust-lang.org/reference/items/traits.html#object-safety> |
| --> $DIR/supertrait-object-safety.rs:4:12 |
| | |
| LL | trait Foo: for<T> Bar<T> {} |
| | --- ^^^^^^^^^^^^^ ...because where clause cannot reference non-lifetime `for<...>` variables |
| | | |
| | this trait cannot be made into an object... |
| = help: only type `()` implements the trait, consider using it directly instead |
| |
| error: aborting due to 3 previous errors; 1 warning emitted |
| |
| For more information about this error, try `rustc --explain E0038`. |
