| async def foo(x): | |
| await x | |
| <error descr="Python version 3.5 does not support 'yield' inside async functions">yield x</error> | |
| <error descr="Python does not support 'yield from' inside async functions">yield from x</error> | |
| <error descr="non-empty 'return' inside asynchronous generator">return x</error> |