error[E0623]: lifetime mismatch
  --> $DIR/ref-mut-struct-async.rs:13:9
   |
LL |     async fn ref_Struct(self: &mut Struct, f: &u32) -> &u32 {
   |                               -----------              ----
   |                               |                        |
   |                               |                        this `async fn` implicitly returns an `impl Future<Output = &u32>`
   |                               this parameter and the returned future are declared with different lifetimes...
LL |         f
   |         ^ ...but data from `f` is held across an await point here

error[E0623]: lifetime mismatch
  --> $DIR/ref-mut-struct-async.rs:17:9
   |
LL |     async fn box_ref_Struct(self: Box<&mut Struct>, f: &u32) -> &u32 {
   |                                       -----------               ----
   |                                       |                         |
   |                                       |                         this `async fn` implicitly returns an `impl Future<Output = &u32>`
   |                                       this parameter and the returned future are declared with different lifetimes...
LL |         f
   |         ^ ...but data from `f` is held across an await point here

error[E0623]: lifetime mismatch
  --> $DIR/ref-mut-struct-async.rs:21:9
   |
LL |     async fn pin_ref_Struct(self: Pin<&mut Struct>, f: &u32) -> &u32 {
   |                                       -----------               ----
   |                                       |                         |
   |                                       |                         this `async fn` implicitly returns an `impl Future<Output = &u32>`
   |                                       this parameter and the returned future are declared with different lifetimes...
LL |         f
   |         ^ ...but data from `f` is held across an await point here

error[E0623]: lifetime mismatch
  --> $DIR/ref-mut-struct-async.rs:25:9
   |
LL |     async fn box_box_ref_Struct(self: Box<Box<&mut Struct>>, f: &u32) -> &u32 {
   |                                               -----------                ----
   |                                               |                          |
   |                                               |                          this `async fn` implicitly returns an `impl Future<Output = &u32>`
   |                                               this parameter and the returned future are declared with different lifetimes...
LL |         f
   |         ^ ...but data from `f` is held across an await point here

error[E0623]: lifetime mismatch
  --> $DIR/ref-mut-struct-async.rs:29:9
   |
LL |     async fn box_pin_ref_Struct(self: Box<Pin<&mut Struct>>, f: &u32) -> &u32 {
   |                                               -----------                ----
   |                                               |                          |
   |                                               |                          this `async fn` implicitly returns an `impl Future<Output = &u32>`
   |                                               this parameter and the returned future are declared with different lifetimes...
LL |         f
   |         ^ ...but data from `f` is held across an await point here

error: aborting due to 5 previous errors

For more information about this error, try `rustc --explain E0623`.