rust/tests/ui/traits/issue-78372.stderr

error[E0412]: cannot find type `PhantomData` in this scope
  --> $DIR/issue-78372.rs:2:23
   |
LL | struct Smaht<T, MISC>(PhantomData);
   |                       ^^^^^^^^^^^ not found in this scope
   |
help: consider importing this struct
   |
LL + use std::marker::PhantomData;
   |

error[E0412]: cannot find type `U` in this scope
  --> $DIR/issue-78372.rs:3:31
   |
LL | impl<T> DispatchFromDyn<Smaht<U, MISC>> for T {}
   |      -                        ^
   |      |
   |      similarly named type parameter `T` defined here
   |
help: a type parameter with a similar name exists
   |
LL | impl<T> DispatchFromDyn<Smaht<T, MISC>> for T {}
   |                               ~
help: you might be missing a type parameter
   |
LL | impl<T, U> DispatchFromDyn<Smaht<U, MISC>> for T {}
   |       +++

error[E0412]: cannot find type `MISC` in this scope
  --> $DIR/issue-78372.rs:3:34
   |
LL | impl<T> DispatchFromDyn<Smaht<U, MISC>> for T {}
   |                                  ^^^^ not found in this scope
   |
help: you might be missing a type parameter
   |
LL | impl<T, MISC> DispatchFromDyn<Smaht<U, MISC>> for T {}
   |       ++++++

error[E0658]: use of unstable library feature 'dispatch_from_dyn'
  --> $DIR/issue-78372.rs:1:5
   |
LL | use std::ops::DispatchFromDyn;
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
   |
   = help: add `#![feature(dispatch_from_dyn)]` to the crate attributes to enable
   = note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date

error[E0658]: use of unstable library feature 'dispatch_from_dyn'
  --> $DIR/issue-78372.rs:3:9
   |
LL | impl<T> DispatchFromDyn<Smaht<U, MISC>> for T {}
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   |
   = help: add `#![feature(dispatch_from_dyn)]` to the crate attributes to enable
   = note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date

error[E0378]: the trait `DispatchFromDyn` may only be implemented for a coercion between structures
  --> $DIR/issue-78372.rs:3:1
   |
LL | impl<T> DispatchFromDyn<Smaht<U, MISC>> for T {}
   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

error[E0038]: the trait `Foo` cannot be made into an object
  --> $DIR/issue-78372.rs:12:17
   |
LL |     fn foo(self: Smaht<Self, T>);
   |                  -------------- help: consider changing method `foo`'s `self` parameter to be `&self`: `&Self`
...
LL | impl Marker for 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/issue-78372.rs:9:18
   |
LL | trait Foo: X<u32> {}
   |       --- this trait cannot be made into an object...
LL | trait X<T> {
LL |     fn foo(self: Smaht<Self, T>);
   |                  ^^^^^^^^^^^^^^ ...because method `foo`'s `self` parameter cannot be dispatched on

error[E0307]: invalid `self` parameter type: Smaht<Self, T>
  --> $DIR/issue-78372.rs:9:18
   |
LL |     fn foo(self: Smaht<Self, T>);
   |                  ^^^^^^^^^^^^^^
   |
   = 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 8 previous errors

Some errors have detailed explanations: E0038, E0307, E0378, E0412, E0658.
For more information about an error, try `rustc --explain E0038`.