In previous versions of aiohttp, if you passed a stream as the data parameter to an aiohttp request, it would not close the stream after the request, now it is closing it because it's wrapping it in a Payload, and later the write method closes it.

I believe aiohttp should not be closing the stream sent to it. This new behavior caused this issue with aiobotocore: aio-libs/aiobotocore#221 resulting in retries failing.