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// edition: 2021
#![feature(unsized_fn_params, unsized_locals)]
//~^ WARN the feature `unsized_locals` is incomplete
use std::future::Future;
async fn bug<T>(mut f: dyn Future<Output = T> + Unpin) -> T {
//~^ ERROR the size for values of type `(dyn Future<Output = T> + Unpin + 'static)` cannot be known at compilation time
(&mut f).await
}
fn main() {}
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