1 error[E0596]: cannot borrow `*self.s` as mutable, as it is behind a `&` reference
2 --> $DIR/issue-38147-1.rs:17:9
5 | ----- help: consider changing this to be a mutable reference: `&mut self`
7 | ^^^^^^^^^^^^^^^^ `self` is a `&` reference, so the data it refers to cannot be borrowed as mutable
9 error: aborting due to previous error
11 For more information about this error, try `rustc --explain E0596`.