:x: Problematic code:
async def foo(): yield 42 yield from [1, 2, 3]
:heavy_check_mark: Correct code:
async def foo(): def _inner_foo(): yield 42 yield from [1, 2, 3]
Used when an yield or yield from statement is found inside an async function. This message belongs to the async checker. It can't be emitted when using Python < 3.5.