| error[E0277]: expected a `std::ops::FnOnce<()>` closure, found `{integer}` | |
| --> $DIR/closure-expected.rs:3:15 | |
| | | |
| LL | let y = x.or_else(4); | |
| | ^^^^^^^ expected an `FnOnce<()>` closure, found `{integer}` | |
| | | |
| = help: the trait `std::ops::FnOnce<()>` is not implemented for `{integer}` | |
| = note: wrap the `{integer}` in a closure with no arguments: `|| { /* code */ } | |
| error: aborting due to previous error | |
| For more information about this error, try `rustc --explain E0277`. |