| error[E0005]: refutable pattern in local binding: `None` not covered | |
| --> $DIR/E0005.rs:3:9 | |
| | | |
| LL | let Some(y) = x; | |
| | ^^^^^^^ pattern `None` not covered | |
| error: aborting due to previous error | |
| For more information about this error, try `rustc --explain E0005`. |