error[E0223]: ambiguous associated type
  --> $DIR/issue-103202.rs:4:17
   |
LL |     fn f(self: &S::x) {}
   |                 ^^^^
   |
help: if there were a trait named `Example` with associated type `x` implemented for `S`, you could use the fully-qualified path
   |
LL |     fn f(self: &<S as Example>::x) {}
   |                 ~~~~~~~~~~~~~~~~~

error: aborting due to previous error

For more information about this error, try `rustc --explain E0223`.