1 error: variable does not need to be mutable
2 --> $DIR/capture-mut-ref.rs:7:9
4 LL | let mut x = &mut 0;
7 | help: remove this `mut`
9 note: lint level defined here
10 --> $DIR/capture-mut-ref.rs:4:9
12 LL | #![deny(unused_mut)]
15 error: aborting due to previous error