error[E0277]: the trait bound `Bar: Eq` is not satisfied
  --> $DIR/where-clauses-method-unsatisfied.rs:18:7
   |
LL |     x.equals(&x);
   |       ^^^^^^ the trait `Eq` is not implemented for `Bar`
   |
note: required by a bound in `Foo::<T>::equals`
  --> $DIR/where-clauses-method-unsatisfied.rs:11:52
   |
LL |     fn equals(&self, u: &Foo<T>) -> bool where T : Eq {
   |                                                    ^^ required by this bound in `Foo::<T>::equals`
help: consider annotating `Bar` with `#[derive(Eq)]`
   |
LL + #[derive(Eq)]
LL | struct Bar; // does not implement Eq
   |

error: aborting due to previous error

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