1 error[E0308]: `if let` arms have incompatible types
2 --> $DIR/if-let-arm-types.rs:6:9
4 LL | / if let Some(b) = None {
9 | | ^ expected (), found integer
11 | |_____- `if let` arms have incompatible types
13 = note: expected type `()`
14 found type `{integer}`
16 error: aborting due to previous error
18 For more information about this error, try `rustc --explain E0308`.