error[E0308]: mismatched types
  --> $DIR/estr-subtyping.rs:10:15
   |
LL |    wants_uniq(x);
   |    ---------- ^- help: try using a conversion method: `.to_string()`
   |    |          |
   |    |          expected struct `String`, found `&str`
   |    arguments to this function are incorrect
   |
note: function defined here
  --> $DIR/estr-subtyping.rs:1:4
   |
LL | fn wants_uniq(x: String) { }
   |    ^^^^^^^^^^ ---------

error: aborting due to previous error

For more information about this error, try `rustc --explain E0308`.