asyncio.async deprecation warning is missing stacklevel=2

[bitdancer]

BPO	29314
Nosy	@gvanrossum, @bitdancer, @methane, @1st1, @Mariatta
Files	issue29314.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 = None
closed_at = <Date 2017-02-07.06:08:08.744>
created_at = <Date 2017-01-18.20:07:47.749>
labels = ['type-bug', '3.7', 'expert-asyncio']
title = 'asyncio.async deprecation warning is missing stacklevel=2'
updated_at = <Date 2017-02-07.07:00:29.161>
user = 'https://github.com/bitdancer'

bugs.python.org fields:

activity = <Date 2017-02-07.07:00:29.161>
actor = 'python-dev'
assignee = 'none'
closed = True
closed_date = <Date 2017-02-07.06:08:08.744>
closer = 'Mariatta'
components = ['asyncio']
creation = <Date 2017-01-18.20:07:47.749>
creator = 'r.david.murray'
dependencies = []
files = ['46369']
hgrepos = []
issue_num = 29314
keywords = ['patch']
message_count = 8.0
messages = ['285750', '285941', '286043', '287196', '287197', '287200', '287201', '287202']
nosy_count = 6.0
nosy_names = ['gvanrossum', 'r.david.murray', 'methane', 'python-dev', 'yselivanov', 'Mariatta']
pr_nums = []
priority = 'normal'
resolution = 'fixed'
stage = 'resolved'
status = 'closed'
superseder = None
type = 'behavior'
url = 'https://bugs.python.org/issue29314'
versions = ['Python 3.5', 'Python 3.6', 'Python 3.7']

[bitdancer]

Title pretty much says it all. The warning isn't very helpful currently, since it just reports the line in tasks.py where the deprecation warning is generated.

[Mariatta]

Attached patch adds stacklevel=2 to the deprecation warning.

[methane]

LGTM.

[python-dev]

New changeset 0f5161f865d7 by Mariatta Wijaya in branch '3.5':
Issue bpo-29314: Set the stacklevel to two in asyncio.async() Deprecation Warning
https://hg.python.org/cpython/rev/0f5161f865d7

New changeset 6dbe9051cdec by Mariatta Wijaya in branch '3.6':
Issue bpo-29314: Merge with 3.5
https://hg.python.org/cpython/rev/6dbe9051cdec

New changeset 9f16900bebaa by Mariatta Wijaya in branch 'default':
Issue bpo-29314: Merge with 3.6
https://hg.python.org/cpython/rev/9f16900bebaa

[Mariatta]

Thanks all :)

[python-dev]

New changeset 00c949c7c3a3eed27a0b320d320097f630eb8fc5 by Mariatta Wijaya in branch 'master':
Issue bpo-29314: Set the stacklevel to two in asyncio.async() Deprecation Warning
00c949c

New changeset 22fce50aa151160540326001ace1e0826f6323a1 by Mariatta Wijaya in branch 'master':
Issue bpo-29314: Merge with 3.5
22fce50

New changeset 2ef05ee4f1c721732918c8839b0b3ac5f1c807a7 by Mariatta Wijaya in branch 'master':
Issue bpo-29314: Merge with 3.6
2ef05ee

[python-dev]

New changeset 00c949c7c3a3eed27a0b320d320097f630eb8fc5 by Mariatta Wijaya in branch '3.6':
Issue bpo-29314: Set the stacklevel to two in asyncio.async() Deprecation Warning
00c949c

New changeset 22fce50aa151160540326001ace1e0826f6323a1 by Mariatta Wijaya in branch '3.6':
Issue bpo-29314: Merge with 3.5
22fce50

[python-dev]

New changeset 00c949c7c3a3eed27a0b320d320097f630eb8fc5 by Mariatta Wijaya in branch '3.5':
Issue bpo-29314: Set the stacklevel to two in asyncio.async() Deprecation Warning
00c949c