| error[E0307]: invalid `self` parameter type: T | |
| --> $DIR/issue-66312.rs:4:22 | |
| | | |
| LL | fn is_some(self: T); | |
| | ^ | |
| | | |
| = note: type of `self` must be `Self` or a type that dereferences to it | |
| = help: consider changing to `self`, `&self`, `&mut self`, `self: Box<Self>`, `self: Rc<Self>`, `self: Arc<Self>`, or `self: Pin<P>` (where P is one of the previous types except `Self`) | |
| error: aborting due to previous error | |
| For more information about this error, try `rustc --explain E0307`. |