error[E0596]: cannot borrow `*self.s` as mutable, as it is behind a `&` reference --> $DIR/issue-38147-2.rs:9:9 | LL | self.s.push('x'); | ^^^^^^ cannot borrow as mutable | help: consider changing this to be mutable | LL | s: &'a mut String, | +++ error[E0596]: cannot borrow `*self.longer_name` as mutable, as it is behind a `&` reference --> $DIR/issue-38147-2.rs:12:9 | LL | self.longer_name.push(13); | ^^^^^^^^^^^^^^^^ cannot borrow as mutable | help: consider changing this to be mutable | LL | longer_name: & 'a mut Vec | +++ error: aborting due to 2 previous errors For more information about this error, try `rustc --explain E0596`.