| error[E0277]: expected a `Fn(&_)` closure, found `()` | |
| --> $DIR/empty-ensures.rs:8:1 | |
| | | |
| LL | #[ensures()] | |
| | ^^^^^^^^^^^^ | |
| | | | |
| | expected an `Fn(&_)` closure, found `()` | |
| | required by a bound introduced by this call | |
| | | |
| = help: the trait `for<'a> Fn(&'a _)` is not implemented for `()` | |
| note: required by a bound in `build_check_ensures` | |
| --> $SRC_DIR/core/src/contracts.rs:LL:COL | |
| error: aborting due to 1 previous error | |
| For more information about this error, try `rustc --explain E0277`. |