| error[E0277]: the trait bound `std::result::Result<(), _>: Future` is not satisfied | |
| --> $DIR/lifetime-elision-return-type-trait.rs:8:13 | |
| | | |
| LL | fn foo() -> impl Future<Item=(), Error=Box<dyn Error>> { | |
| | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the trait `Future` is not implemented for `std::result::Result<(), _>` | |
| error: aborting due to previous error | |
| For more information about this error, try `rustc --explain E0277`. |