| warning: unused coroutine that must be used | |
| --> $DIR/yield-in-args-rev.rs:13:5 | |
| | | |
| LL | / || { | |
| LL | | let b = true; | |
| LL | | foo(yield, &b); | |
| LL | | }; | |
| | |_____^ | |
| | | |
| = note: coroutines are lazy and do nothing unless resumed | |
| = note: `#[warn(unused_must_use)]` on by default | |
| warning: 1 warning emitted | |