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error[E0005]: refutable pattern in local binding
--> $DIR/E0005.rs:3:9
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LL | let Some(y) = x;
| ^^^^^^^ pattern `None` not covered
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= 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
= note: the matched value is of type `Option<i32>`
help: you might want to use `let else` to handle the variant that isn't matched
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LL | let Some(y) = x else { todo!() };
| ++++++++++++++++
error: aborting due to previous error
For more information about this error, try `rustc --explain E0005`.
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