error[E0658]: yield syntax is experimental
 --> $DIR/yield_in_async.rs:6:13
  |
6 |             yield 123;
  |             ^^^^^^^^^
  |
  = note: see issue #43122 <https://github.com/rust-lang/rust/issues/43122> for more information

error[E0727]: `async` generators are not yet supported
 --> $DIR/yield_in_async.rs:6:13
  |
6 |             yield 123;
  |             ^^^^^^^^^

error[E0271]: type mismatch resolving `<[static generator@$DIR/src/lib.rs:201:9: 201:67] as Generator<ResumeTy>>::Yield == ()`
  --> $DIR/yield_in_async.rs:4:5
   |
4  | /     stream! {
5  | |         let f = async {
6  | |             yield 123;
7  | |         };
8  | |
9  | |         let v = f.await;
10 | |     };
   | |______^ expected `()`, found integer
   |
   = note: this error originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)

error[E0698]: type inside `async` block must be known in this context
 --> $DIR/yield_in_async.rs:6:19
  |
6 |             yield 123;
  |                   ^^^ cannot infer type for type `{integer}`
  |
note: the type is part of the `async` block because of this `yield`
 --> $DIR/yield_in_async.rs:6:13
  |
6 |             yield 123;
  |             ^^^^^^^^^

error[E0698]: type inside `async` block must be known in this context
 --> $DIR/yield_in_async.rs:5:13
  |
5 |         let f = async {
  |             ^ cannot infer type for type `{integer}`
  |
note: the type is part of the `async` block because of this `await`
 --> $DIR/yield_in_async.rs:9:17
  |
9 |         let v = f.await;
  |                 ^^^^^^^

error[E0698]: type inside `async` block must be known in this context
 --> $DIR/yield_in_async.rs:9:17
  |
9 |         let v = f.await;
  |                 ^ cannot infer type for type `{integer}`
  |
note: the type is part of the `async` block because of this `await`
 --> $DIR/yield_in_async.rs:9:17
  |
9 |         let v = f.await;
  |                 ^^^^^^^

error[E0698]: type inside `async` block must be known in this context
 --> $DIR/yield_in_async.rs:9:17
  |
9 |         let v = f.await;
  |                 ^^^^^^^ cannot infer type for type `{integer}`
  |
note: the type is part of the `async` block because of this `await`
 --> $DIR/yield_in_async.rs:9:17
  |
9 |         let v = f.await;
  |                 ^^^^^^^