error[E0223]: ambiguous associated type
  --> $DIR/qualified-path-params-2.rs:18:10
   |
LL | type A = <S as Tr>::A::f<u8>;
   |          ^^^^^^^^^^^^^^^^^^^
   |
help: if there were a trait named `Example` with associated type `f` implemented for `<S as Tr>::A`, you could use the fully-qualified path
   |
LL | type A = <<S as Tr>::A as Example>::f;
   |          ~~~~~~~~~~~~~~~~~~~~~~~~~~~~

error: aborting due to 1 previous error

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