|  | //@ edition:2018 | 
|  |  | 
|  | #![allow(non_snake_case)] | 
|  |  | 
|  | use std::pin::Pin; | 
|  |  | 
|  | trait Trait { | 
|  | type AssocType; | 
|  | } | 
|  |  | 
|  | struct Struct { } | 
|  |  | 
|  | impl Trait for Struct { | 
|  | type AssocType = Self; | 
|  | } | 
|  |  | 
|  | impl Struct { | 
|  | async fn ref_AssocType(self: &<Struct as Trait>::AssocType, f: &u32) -> &u32 { | 
|  | f | 
|  | //~^ ERROR lifetime may not live long enough | 
|  | } | 
|  |  | 
|  | async fn box_ref_AssocType(self: Box<&<Struct as Trait>::AssocType>, f: &u32) -> &u32 { | 
|  | f | 
|  | //~^ ERROR lifetime may not live long enough | 
|  | } | 
|  |  | 
|  | async fn pin_ref_AssocType(self: Pin<&<Struct as Trait>::AssocType>, f: &u32) -> &u32 { | 
|  | f | 
|  | //~^ ERROR lifetime may not live long enough | 
|  | } | 
|  |  | 
|  | async fn box_box_ref_AssocType(self: Box<Box<&<Struct as Trait>::AssocType>>, f: &u32) -> &u32 { | 
|  | f | 
|  | //~^ ERROR lifetime may not live long enough | 
|  | } | 
|  |  | 
|  | async fn box_pin_ref_AssocType(self: Box<Pin<&<Struct as Trait>::AssocType>>, f: &u32) -> &u32 { | 
|  | f | 
|  | //~^ ERROR lifetime may not live long enough | 
|  | } | 
|  | } | 
|  |  | 
|  | fn main() { } |