warning: the feature `impl_trait_in_bindings` is incomplete and may cause the compiler to crash
  --> $DIR/cannot-infer-async-enabled-impl-trait-bindings.rs:2:12
   |
LL | #![feature(impl_trait_in_bindings)]
   |            ^^^^^^^^^^^^^^^^^^^^^^
   |
   = note: `#[warn(incomplete_features)]` on by default

error[E0282]: type annotations needed for `impl std::future::Future`
  --> $DIR/cannot-infer-async-enabled-impl-trait-bindings.rs:13:9
   |
LL |     let fut = async {
   |         --- consider giving `fut` the explicit type `impl std::future::Future`, with the type parameters specified
LL |         make_unit()?;
   |         ^^^^^^^^^^^^ cannot infer type

error: aborting due to previous error

For more information about this error, try `rustc --explain E0282`.