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error[E0277]: `()` is not a future
--> $DIR/async-error-span.rs:10:20
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LL | fn get_future() -> impl Future<Output = ()> {
| ^^^^^^^^^^^^^^^^^^^^^^^^ `()` is not a future
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= help: the trait `Future` is not implemented for `()`
= note: () must be a future or must implement `IntoFuture` to be awaited
error[E0698]: type inside `async fn` body must be known in this context
--> $DIR/async-error-span.rs:16:9
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LL | let a;
| ^ cannot infer type
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note: the type is part of the `async fn` body because of this `await`
--> $DIR/async-error-span.rs:17:17
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LL | get_future().await;
| ^^^^^^
error: aborting due to 2 previous errors
Some errors have detailed explanations: E0277, E0698.
For more information about an error, try `rustc --explain E0277`.
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