1 error[E0038]: the trait `Trait` cannot be made into an object
2 --> $DIR/object-unsafe-trait-should-use-where-sized.rs:9:12
4 LL | fn bar(x: &dyn Trait) {}
5 | ^^^^^^^^^ `Trait` cannot be made into an object
7 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>
8 --> $DIR/object-unsafe-trait-should-use-where-sized.rs:5:8
11 | ----- this trait cannot be made into an object...
12 LL | fn foo() where Self: Other, { }
13 | ^^^ ...because associated function `foo` has no `self` parameter
14 LL | fn bar(self: ()) {}
15 | ^^ ...because method `bar`'s `self` parameter cannot be dispatched on
16 help: consider turning `foo` into a method by giving it a `&self` argument
18 LL | fn foo(&self) where Self: Other, { }
20 help: alternatively, consider constraining `foo` so it does not apply to trait objects
22 LL | fn foo() where Self: Other, Self: Sized { }
24 help: consider changing method `bar`'s `self` parameter to be `&self`
26 LL | fn bar(self: &Self) {}
29 error[E0307]: invalid `self` parameter type: ()
30 --> $DIR/object-unsafe-trait-should-use-where-sized.rs:6:18
32 LL | fn bar(self: ()) {}
35 = note: type of `self` must be `Self` or a type that dereferences to it
36 = 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`)
38 error: aborting due to 2 previous errors
40 Some errors have detailed explanations: E0038, E0307.
41 For more information about an error, try `rustc --explain E0038`.