error[E0373]: async block may outlive the current function, but it borrows `x`, which is owned by the current function
  --> $DIR/async-borrowck-escaping-block-error.rs:6:14
   |
LL |     Box::new(async { x } )
   |              ^^^^^^^^-^^
   |              |       |
   |              |       `x` is borrowed here
   |              may outlive borrowed value `x`
   |
note: async block is returned here
  --> $DIR/async-borrowck-escaping-block-error.rs:6:5
   |
LL |     Box::new(async { x } )
   |     ^^^^^^^^^^^^^^^^^^^^^^
help: to force the async block to take ownership of `x` (and any other referenced variables), use the `move` keyword
   |
LL |     Box::new(async move { x } )
   |                    ++++

error[E0373]: async block may outlive the current function, but it borrows `x`, which is owned by the current function
  --> $DIR/async-borrowck-escaping-block-error.rs:11:5
   |
LL |     async { *x }
   |     ^^^^^^^^--^^
   |     |       |
   |     |       `x` is borrowed here
   |     may outlive borrowed value `x`
   |
note: async block is returned here
  --> $DIR/async-borrowck-escaping-block-error.rs:11:5
   |
LL |     async { *x }
   |     ^^^^^^^^^^^^
help: to force the async block to take ownership of `x` (and any other referenced variables), use the `move` keyword
   |
LL |     async move { *x }
   |           ++++

error: aborting due to 2 previous errors

For more information about this error, try `rustc --explain E0373`.