error[E0596]: cannot borrow immutable field `f.v` as mutable
  --> $DIR/issue-35937.rs:17:5
   |
16 |     let f = Foo { v: Vec::new() };
   |         - consider changing this to `mut f`
17 |     f.v.push("cat".to_string());
   |     ^^^ cannot mutably borrow immutable field

error[E0594]: cannot assign to immutable field `s.x`
  --> $DIR/issue-35937.rs:26:5
   |
25 |     let s = S { x: 42 };
   |         - consider changing this to `mut s`
26 |     s.x += 1;
   |     ^^^^^^^^ cannot mutably borrow immutable field

error[E0594]: cannot assign to immutable field `s.x`
  --> $DIR/issue-35937.rs:30:5
   |
29 | fn bar(s: S) {
   |        - consider changing this to `mut s`
30 |     s.x += 1;
   |     ^^^^^^^^ cannot mutably borrow immutable field

error: aborting due to 3 previous errors