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error[E0277]: the size for values of type `dyn Future<Output = T> + Unpin` cannot be known at compilation time
--> $DIR/awaiting-unsized-param.rs:7:17
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LL | async fn bug<T>(mut f: dyn Future<Output = T> + Unpin) -> T {
| ^^^^^ doesn't have a size known at compile-time
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= help: the trait `Sized` is not implemented for `dyn Future<Output = T> + Unpin`
= note: all local variables must have a statically known size
error: aborting due to 1 previous error
For more information about this error, try `rustc --explain E0277`.
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