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