warning: the feature `impl_trait_in_bindings` is incomplete and may cause the compiler to crash
  --> $DIR/bindings-opaque.rs:1:12
   |
LL | #![feature(impl_trait_in_bindings)]
   |            ^^^^^^^^^^^^^^^^^^^^^^
   |
   = note: `#[warn(incomplete_features)]` on by default

error[E0599]: no method named `count_ones` found for type `impl std::marker::Copy` in the current scope
  --> $DIR/bindings-opaque.rs:11:17
   |
LL |     let _ = FOO.count_ones();
   |                 ^^^^^^^^^^

error[E0599]: no method named `count_ones` found for type `impl std::marker::Copy` in the current scope
  --> $DIR/bindings-opaque.rs:13:17
   |
LL |     let _ = BAR.count_ones();
   |                 ^^^^^^^^^^

error[E0599]: no method named `count_ones` found for type `impl std::marker::Copy` in the current scope
  --> $DIR/bindings-opaque.rs:15:17
   |
LL |     let _ = foo.count_ones();
   |                 ^^^^^^^^^^

error: aborting due to 3 previous errors

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