error[E0599]: no method named `uwu` found for struct `Foo` in the current scope
  --> $DIR/unused-trait-with-method-err.rs:15:9
   |
LL | struct Foo;
   | ---------- method `uwu` not found for this struct
...
LL |     Foo.uwu();
   |         ^^^ method not found in `Foo`
   |
   = help: items from traits can only be used if the trait is implemented and in scope
note: `Bar` defines an item `uwu`, perhaps you need to implement it
  --> $DIR/unused-trait-with-method-err.rs:7:5
   |
LL |     pub trait Bar {
   |     ^^^^^^^^^^^^^

error: aborting due to 1 previous error

For more information about this error, try `rustc --explain E0599`.