// edition:2021 #![feature(async_fn_in_trait)] trait MyTrait<'a, 'b, T> { async fn foo(&'a self, key: &'b T) -> (&'a ConnImpl, &'b T); //~^ ERROR: cannot find type `ConnImpl` in this scope [E0412] } impl<'a, 'b, T, U> MyTrait for U { //~^ ERROR: implicit elided lifetime not allowed here [E0726] async fn foo(_: T) -> (&'a U, &'b T) {} //~^ ERROR: method `foo` has a `&self` declaration in the trait, but not in the impl [E0186] //~| ERROR: mismatched types [E0308] } fn main() {}