New upstream version 1.49.0~beta.4+dfsg1

[rustc.git] / src / test / ui / kindck / kindck-inherited-copy-bound.object_safe_for_dispatch.stderr

error[E0277]: the trait bound `Box<{integer}>: Foo` is not satisfied
  --> $DIR/kindck-inherited-copy-bound.rs:21:16
   |
LL | fn take_param<T:Foo>(foo: &T) { }
   |                 --- required by this bound in `take_param`
...
LL |     take_param(&x);
   |                ^^ the trait `Copy` is not implemented for `Box<{integer}>`
   |
   = note: required because of the requirements on the impl of `Foo` for `Box<{integer}>`

error[E0038]: the trait `Foo` cannot be made into an object
  --> $DIR/kindck-inherited-copy-bound.rs:28:13
   |
LL |     let z = &x as &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/kindck-inherited-copy-bound.rs:10:13
   |
LL | trait Foo : Copy {
   |       ---   ^^^^ ...because it requires `Self: Sized`
   |       |
   |       this trait cannot be made into an object...
   = note: required because of the requirements on the impl of `CoerceUnsized<&dyn Foo>` for `&Box<i32>`
   = note: required by cast to type `&dyn Foo`

error: aborting due to 2 previous errors

Some errors have detailed explanations: E0038, E0277.
For more information about an error, try `rustc --explain E0038`.