[issue25593] _sock_connect_cb can be called twice resulting in InvalidStateError

[Justin Mayfield]

Justin Mayfield added the comment:

I'm attaching a patch that runs `_ready` callbacks at the start of `_run_once`.  The style and implications are ranging so I leave it to you at this point.

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keywords: +patch
Added file: http://bugs.python.org/file41019/run_once_testfix_for_Issue25593.patch

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