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error[E0277]: `()` is not a future
--> $DIR/unnecessary-await.rs:9:10
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LL | boo().await;
| -----^^^^^^ `()` is not a future
| |
| this call returns `()`
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= help: the trait `Future` is not implemented for `()`
= note: () must be a future or must implement `IntoFuture` to be awaited
= note: required because of the requirements on the impl of `IntoFuture` for `()`
help: remove the `.await`
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LL - boo().await;
LL + boo();
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help: alternatively, consider making `fn boo` asynchronous
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LL | async fn boo() {}
| +++++
error: aborting due to previous error
For more information about this error, try `rustc --explain E0277`.
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