error[E0277]: the trait bound `T: Foo<usize>` is not satisfied
  --> $DIR/associated-types-invalid-trait-ref-issue-18865.rs:10:13
   |
LL |     let u: <T as Foo<usize>>::Bar = t.get_bar();
   |             ^ the trait `Foo<usize>` is not implemented for `T`

error: aborting due to 1 previous error

For more information about this error, try `rustc --explain E0277`.