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// edition: 2021
// build-fail
//~^^ ERROR cycle detected when computing layout of
#![feature(impl_trait_in_assoc_type)]
use core::future::Future;
trait Recur {
type Recur: Future<Output = ()>;
fn recur(self) -> Self::Recur;
}
async fn recur(t: impl Recur) {
t.recur().await;
}
impl Recur for () {
type Recur = impl Future<Output = ()>;
fn recur(self) -> Self::Recur {
async move { recur(self).await; }
}
}
fn main() {
recur(());
}
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