1 error[E0277]: expected a `FnOnce<()>` closure, found `{integer}`
2 --> $DIR/closure-expected.rs:3:23
4 LL | let y = x.or_else(4);
5 | ^ expected an `FnOnce<()>` closure, found `{integer}`
7 = help: the trait `FnOnce<()>` is not implemented for `{integer}`
8 = note: wrap the `{integer}` in a closure with no arguments: `|| { /* code */ }`
10 error: aborting due to previous error
12 For more information about this error, try `rustc --explain E0277`.