BaseSelectorEventLoop.sock_{recv,sendall}() don't remove their callbacks when canceled

abacabadabacaba

BPO	30064
Nosy	@fantix, @ned-deily, @asvetlov, @ambv, @1st1, @achimnol, @miss-islington, @aeros
PRs	bpo-30064: Refactor sock_* asyncio API #10419 bpo-30064: Fix asyncio loop.sock_* race condition issue #20369 [3.9] bpo-30064: Fix asyncio loop.sock_* race condition issue (GH-20369) #20460 bpo-30064: Fix unstable asyncio "racing" socket tests #20485 [3.9] bpo-30064: Fix unstable asyncio "racing" socket tests (GH-20485) #20487 bpo-30064: Properly skip unstable loop.sock_connect() racing test #20494 [3.9] bpo-30064: Properly skip unstable loop.sock_connect() racing test (GH-20494) #20503 bpo-30064: Fix slow asyncio sock test #20868 [3.9] bpo-30064: Fix slow asyncio sock test (GH-20868) #20869
Files	cancelled-sock-recv-race.patch

^{Note: these values reflect the state of the issue at the time it was migrated and might not reflect the current state.}

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GitHub fields:

assignee = 'https://github.com/asvetlov'
closed_at = None
created_at = <Date 2017-04-13.08:55:09.854>
labels = ['type-bug', '3.9', '3.10', 'expert-asyncio']
title = "BaseSelectorEventLoop.sock_{recv,sendall}() don't remove their callbacks when canceled"
updated_at = <Date 2020-06-15.16:37:16.856>
user = 'https://bugs.python.org/abacabadabacaba'

bugs.python.org fields:

activity = <Date 2020-06-15.16:37:16.856>
actor = 'vstinner'
assignee = 'asvetlov'
closed = False
closed_date = None
closer = None
components = ['asyncio']
creation = <Date 2017-04-13.08:55:09.854>
creator = 'abacabadabacaba'
dependencies = []
files = ['49146']
hgrepos = []
issue_num = 30064
keywords = ['patch']
message_count = 41.0
messages = ['291593', '326294', '329746', '355272', '355273', '357989', '358011', '358098', '358108', '362637', '362671', '362690', '368553', '368701', '368702', '370123', '370131', '370143', '370147', '370159', '370161', '370205', '370215', '370218', '370219', '370234', '370268', '370269', '371240', '371247', '371467', '371478', '371479', '371485', '371489', '371490', '371491', '371492', '371495', '371498', '371499']
nosy_count = 9.0
nosy_names = ['fantix', 'ned.deily', 'asvetlov', 'abacabadabacaba', 'lukasz.langa', 'yselivanov', 'achimnol', 'miss-islington', 'aeros']
pr_nums = ['10419', '20369', '20460', '20485', '20487', '20494', '20503', '20868', '20869']
priority = 'high'
resolution = None
stage = 'commit review'
status = 'open'
superseder = None
type = 'behavior'
url = 'https://bugs.python.org/issue30064'
versions = ['Python 3.9', 'Python 3.10']