| error[E0072]: recursive type `Foo` has infinite size | |
| --> $DIR/issue-17431-1.rs:1:1 | |
| | | |
| LL | struct Foo { foo: Option<Option<Foo>> } | |
| | ^^^^^^^^^^ --- recursive without indirection | |
| | | |
| help: insert some indirection (e.g., a `Box`, `Rc`, or `&`) to break the cycle | |
| | | |
| LL | struct Foo { foo: Option<Option<Box<Foo>>> } | |
| | ++++ + | |
| error: aborting due to 1 previous error | |
| For more information about this error, try `rustc --explain E0072`. |