error[E0597]: `z` does not live long enough --> $DIR/issue-46471-1.rs:4:9 | LL | let mut z = 0; | ----- binding `z` declared here LL | &mut z | ^^^^^^ borrowed value does not live long enough LL | }; | - `z` dropped here while still borrowed error: aborting due to 1 previous error For more information about this error, try `rustc --explain E0597`.