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-error[E0038]: the trait `Trait` cannot be made into an object
- --> $DIR/object-unsafe-trait-should-use-where-sized.rs:9:12
- |
-LL | fn bar(x: &dyn Trait) {}
- | ^^^^^^^^^ `Trait` 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/object-unsafe-trait-should-use-where-sized.rs:5:8
- |
-LL | trait Trait {
- | ----- this trait cannot be made into an object...
-LL | fn foo() where Self: Other, { }
- | ^^^ ...because associated function `foo` has no `self` parameter
-LL | fn bar(self: ()) {}
- | ^^ ...because method `bar`'s `self` parameter cannot be dispatched on
-help: consider turning `foo` into a method by giving it a `&self` argument
- |
-LL | fn foo(&self) where Self: Other, { }
- | +++++
-help: alternatively, consider constraining `foo` so it does not apply to trait objects
- |
-LL | fn foo() where Self: Other, Self: Sized { }
- | ~~~~~~~~~~~~~
-help: consider changing method `bar`'s `self` parameter to be `&self`
- |
-LL | fn bar(self: &Self) {}
- | ~~~~~
-
-error[E0307]: invalid `self` parameter type: ()
- --> $DIR/object-unsafe-trait-should-use-where-sized.rs:6:18
- |
-LL | fn bar(self: ()) {}
- | ^^
- |
- = note: type of `self` must be `Self` or a type that dereferences to it
- = help: consider changing to `self`, `&self`, `&mut self`, `self: Box<Self>`, `self: Rc<Self>`, `self: Arc<Self>`, or `self: Pin<P>` (where P is one of the previous types except `Self`)
-
-error: aborting due to 2 previous errors
-
-Some errors have detailed explanations: E0038, E0307.
-For more information about an error, try `rustc --explain E0038`.