warning: unused generator that must be used
  --> $DIR/issue-57084.rs:22:5
   |
LL | /     || {
LL | |         let _to_pin = with(move || println!("{:p}", data));
LL | |         loop {
LL | |             yield
LL | |         }
LL | |     };
   | |_____^
   |
   = note: generators are lazy and do nothing unless resumed
   = note: `#[warn(unused_must_use)]` on by default

warning: 1 warning emitted