LL | x
| ^ lifetime mismatch
|
- = note: expected type `&'a mut &'a i32`
- found type `&'a mut &'b i32`
+ = note: expected mutable reference `&'a mut &'a i32`
+ found mutable reference `&'a mut &'b i32`
note: the lifetime `'a` as defined on the method body at 9:12...
--> $DIR/match-ref-mut-let-invariance.rs:9:12
|