socket.recv() blocks while it's gettimeout() returns 0.0

[animus]

BPO	25471
Files	s1.py

^{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 = None
closed_at = <Date 2015-10-25.03:07:43.034>
created_at = <Date 2015-10-24.23:03:29.910>
labels = []
title = "socket.recv() blocks while it's gettimeout() returns 0.0"
updated_at = <Date 2015-10-25.03:07:43.006>
user = 'https://bugs.python.org/animus'

bugs.python.org fields:

activity = <Date 2015-10-25.03:07:43.006>
actor = 'python-dev'
assignee = 'none'
closed = True
closed_date = <Date 2015-10-25.03:07:43.034>
closer = 'python-dev'
components = []
creation = <Date 2015-10-24.23:03:29.910>
creator = 'animus'
dependencies = []
files = ['40856']
hgrepos = []
issue_num = 25471
keywords = []
message_count = 3.0
messages = ['253418', '253419', '253420']
nosy_count = 2.0
nosy_names = ['python-dev', 'animus']
pr_nums = []
priority = 'normal'
resolution = 'fixed'
stage = 'resolved'
status = 'closed'
superseder = None
type = None
url = 'https://bugs.python.org/issue25471'
versions = ['Python 2.7', 'Python 3.5']

[animus]

socket created with listening socket set to setblocking(False). gettimeout() of accept()-returned socket returns 0.0 , but recv() method blocks while client is connected and not sending any data. If client disconnects, socket returned by accept() starting return 0-length bytes string without blocking.

glibc doc on recv():
---
If nonblocking mode is set for SOCKET, and no data are available to be read, 'recv' fails immediately rather than waiting.
---

testing server and client code attached.

tested with Python 3.5.0 and Python 2.7.10

[animus]

telnet 127.0.0.1 9000 can be used as testing client

[python-dev]

New changeset 10e044a734f3 by Benjamin Peterson in branch '3.4':
accepted sockets shouldn't inherit the SOCK_NONBLOCK flag (closes bpo-25471)
https://hg.python.org/cpython/rev/10e044a734f3

New changeset 7577960ea17b by Benjamin Peterson in branch '3.5':
merge 3.4 (bpo-25471)
https://hg.python.org/cpython/rev/7577960ea17b

New changeset 347221cfa224 by Benjamin Peterson in branch 'default':
merge 3.5 (bpo-25471)
https://hg.python.org/cpython/rev/347221cfa224