error[E0277]: the trait bound `Rc<RefCell<S>>: Borrow<S>` is not satisfied
  --> $DIR/shadowed-intrinsic-method-deref.rs:16:22
   |
LL |     let sb : &S = &s.borrow();
   |                      ^^^^^^ the trait `Borrow<S>` is not implemented for `Rc<RefCell<S>>`
   |
help: the trait `Borrow<S>` is not implemented for `Rc<RefCell<S>>`
      but trait `Borrow<RefCell<S>>` is implemented for it
  --> $SRC_DIR/alloc/src/rc.rs:LL:COL
   = help: for that trait implementation, expected `RefCell<S>`, found `S`
   = note: there's an inherent method on `RefCell<S>` of the same name, which can be auto-dereferenced from `&RefCell<T>`
help: to access the inherent method on `RefCell<S>`, use the fully-qualified path
   |
LL -     let sb : &S = &s.borrow();
LL +     let sb : &S = &RefCell::borrow(&s);
   |