error: Item annotated with `#[unstable_feature_bound]` should not be stable
  --> $DIR/unstable_feature_bound_incompatible_stability.rs:11:1
   |
LL | fn bar() {}
   | ^^^^^^^^^^^
   |
   = help: If this item is meant to be stable, do not use any functions annotated with `#[unstable_feature_bound]`. Otherwise, mark this item as unstable with `#[unstable]`

error: aborting due to 1 previous error