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error[E0005]: refutable pattern in local binding: `None` not covered
--> $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
help: you might want to use `if let` to ignore the variant that isn't matched
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LL | if let Some(y) = x { /* */ }
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
error: aborting due to previous error
For more information about this error, try `rustc --explain E0005`.
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