src/test/ui/did_you_mean/issue-38147-1.stderr

   1 error[E0389]: cannot borrow data mutably in a `&` reference
   2   --> $DIR/issue-38147-1.rs:27:9
   3    |
   4 26 |     fn f(&self) {
   5    |          ----- use `&mut self` here to make mutable
   6 27 |         self.s.push('x');
   7    |         ^^^^^^ assignment into an immutable reference
   8
   9 error: aborting due to previous error
  10