| error[E0308]: mismatched types | |
| --> $DIR/liveness-closure-require-ret.rs:2:37 | |
| | | |
| LL | fn main() { println!("{}", force(|| {})); } | |
| | ^^ expected `isize`, found `()` | |
| error: aborting due to 1 previous error | |
| For more information about this error, try `rustc --explain E0308`. |