[issue29406] asyncio SSL contexts leak sockets after calling close with certain Apache servers

[Yury Selivanov]

Yury Selivanov added the comment:

> It's interesting to see how `_process_write_backlog` gets called after `_finalize`. One option would be to simply guard `transport.write` with `if transport is not None`, but I'm afraid that we'll only mask the bug then.

OTOH we weren't setting the transport to None before, we were just closing it. Is setting it to None really necessary?

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue29406>
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