| error[E0005]: refutable pattern in local binding: `None` not covered |
| --> $DIR/E0005.rs:3:9 |
| | |
| LL | let Some(y) = x; |
| | ^^^^^^^ pattern `None` not covered |
| | |
| = note: `let` bindings require an "irrefutable pattern", like a `struct` or an `enum` with only one variant |
| = note: for more information, visit https://doc.rust-lang.org/book/ch18-02-refutability.html |
| help: you might want to use `if let` to ignore the variant that isn't matched |
| | |
| LL | if let Some(y) = x { /* */ } |
| | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ |
| |
| error: aborting due to previous error |
| |
| For more information about this error, try `rustc --explain E0005`. |
