error[E0728]: `await` is only allowed inside `async` functions and blocks
  --> $DIR/issue-62009-1.rs:6:23
   |
LL | fn main() {
   |    ---- this is not `async`
LL |     async { let (); }.await;
   |                       ^^^^^ only allowed inside `async` functions and blocks

error[E0728]: `await` is only allowed inside `async` functions and blocks
  --> $DIR/issue-62009-1.rs:10:7
   |
LL | fn main() {
   |    ---- this is not `async`
...
LL |     }.await;
   |       ^^^^^ only allowed inside `async` functions and blocks

error[E0728]: `await` is only allowed inside `async` functions and blocks
  --> $DIR/issue-62009-1.rs:12:16
   |
LL | fn main() {
   |    ---- this is not `async`
...
LL |     (|_| 2333).await;
   |                ^^^^^ only allowed inside `async` functions and blocks

error: aborting due to 3 previous errors

For more information about this error, try `rustc --explain E0728`.