warning: the feature `return_position_impl_trait_in_trait` is incomplete and may not be safe to use and/or cause compiler crashes --> $DIR/default-method-binder-shifting.rs:3:12 | LL | #![feature(return_position_impl_trait_in_trait)] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ | = note: see issue #91611 for more information = note: `#[warn(incomplete_features)]` on by default warning: 1 warning emitted