[3.7] bpo-32710: Fix leak in Overlapped_WSASend() (GH-11469) by miss-islington · Pull Request #11471 · python/cpython

@vstinner @miss-islington

Fix a memory leak in asyncio in the ProactorEventLoop when ReadFile()
or WSASend() overlapped operation fail immediately: release the
internal buffer.
(cherry picked from commit a234e14)

Co-authored-by: Victor Stinner <vstinner@redhat.com>

vstinner