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use async_trait::async_trait; pub struct S {} pub enum E { V {}, } #[async_trait] pub trait Trait { async fn method(self); } #[async_trait] impl Trait for S { async fn method(self) { let _: () = self; let _: Self = Self; } } #[async_trait] impl Trait for E { async fn method(self) { let _: () = self; let _: Self = Self::V; } } fn main() {}