| error[E0392]: type parameter `T` is never used | |
| --> $DIR/E0374.rs:4:12 | |
| | | |
| LL | struct Foo<T: ?Sized> { | |
| | ^ unused type parameter | |
| | | |
| = help: consider removing `T`, referring to it in a field, or using a marker such as `PhantomData` | |
| error[E0374]: implementing `CoerceUnsized` requires a field to be coerced | |
| --> $DIR/E0374.rs:8:1 | |
| | | |
| LL | / impl<T, U> CoerceUnsized<Foo<U>> for Foo<T> | |
| LL | | where T: CoerceUnsized<U> {} | |
| | |_____________________________^ | |
| | | |
| = note: expected a single field to be coerced, none found | |
| error: aborting due to 2 previous errors | |
| Some errors have detailed explanations: E0374, E0392. | |
| For more information about an error, try `rustc --explain E0374`. |