[New-bugs-announce] [issue44928] async generator missing unawaited coroutine warning

[Thomas Grainger]

New submission from Thomas Grainger <tagrain at gmail.com>:

demo program:

```
def test_async_fn():
    async def async_fn():
        pass

    async_fn()


def test_async_gen_fn():
    async def agen_fn():
        yield

    agen_fn().aclose()
    agen_fn().asend(None)

test_async_fn()
test_async_gen_fn()
```

output:

```
/home/graingert/projects/anyio/foo.py:5: RuntimeWarning: coroutine 'test_async_fn.<locals>.async_fn' was never awaited
  async_fn()
RuntimeWarning: Enable tracemalloc to get the object allocation traceback
```

expected:


```
/home/graingert/projects/anyio/foo.py:5: RuntimeWarning: coroutine 'test_async_fn.<locals>.async_fn' was never awaited
  async_fn()
RuntimeWarning: Enable tracemalloc to get the object allocation traceback
/home/graingert/projects/anyio/foo.py:12: RuntimeWarning: coroutine '<async_generator_athrow object at 0xffffffffffff>' was never awaited
  agen_fn().aclose()
RuntimeWarning: Enable tracemalloc to get the object allocation traceback
/home/graingert/projects/anyio/foo.py:13: RuntimeWarning: coroutine '<async_generator_asend object at 0xffffffffffff>' was never awaited
  agen_fn().asend(None)
RuntimeWarning: Enable tracemalloc to get the object allocation traceback
```

----------
components: Interpreter Core
messages: 399684
nosy: graingert
priority: normal
severity: normal
status: open
title: async generator missing unawaited coroutine warning
versions: Python 3.10, Python 3.11, Python 3.6, Python 3.7, Python 3.8, Python 3.9

_______________________________________
Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue44928>
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