1 error[E0308]: mismatched types
2 --> $DIR/match-ref-mut-let-invariance.rs:11:9
7 = note: expected mutable reference `&'a mut &'a i32`
8 found mutable reference `&'a mut &'b i32`
9 note: the lifetime `'a` as defined here...
10 --> $DIR/match-ref-mut-let-invariance.rs:9:12
12 LL | fn bar<'a>(&'a mut self) -> &'a mut &'a i32 {
14 note: ...does not necessarily outlive the lifetime `'b` as defined here
15 --> $DIR/match-ref-mut-let-invariance.rs:8:6
20 error: aborting due to previous error
22 For more information about this error, try `rustc --explain E0308`.