| error[E0271]: type mismatch resolving `<Result<Result<(), Result<Result<(), Result<Result<(), Option<{integer}>>, ...>>, ...>>, ...> as Future>::Error == Foo` |
| --> $DIR/E0271.rs:18:5 |
| | |
| LL | / Box::new( |
| LL | | Ok::<_, ()>( |
| LL | | Err::<(), _>( |
| LL | | Ok::<_, ()>( |
| ... | |
| LL | | ) |
| LL | | ) |
| | |_____^ type mismatch resolving `<Result<Result<(), Result<Result<(), ...>, ...>>, ...> as Future>::Error == Foo` |
| | |
| note: expected this to be `Foo` |
| --> $DIR/E0271.rs:8:18 |
| | |
| LL | type Error = E; |
| | ^ |
| = note: required for the cast from `Box<Result<Result<(), Result<Result<(), Result<Result<(), Option<{integer}>>, ()>>, ()>>, ()>>` to `Box<(dyn Future<Error = Foo> + 'static)>` |
| |
| error: aborting due to 1 previous error |
| |
| For more information about this error, try `rustc --explain E0271`. |
