Disallow ambiguous syntax f(x for x in [1],)

serhiy-storchaka

BPO	32012
Nosy	@gvanrossum, @brettcannon, @ncoghlan, @benjaminp, @serhiy-storchaka, @cryvate, @miss-islington
PRs	bpo-32012: Disallow trailing comma after genexpr without parenthesis. #4382 bpo-32023: Disallow genexprs without parenthesis in class definitions. #4400 [3.7] Revert "closes bpo-27494: Fix 2to3 handling of trailing comma after a generator expression (GH-3771)" (GH-8241) #8580

^{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 2017-11-15.08:16:39.988>
created_at = <Date 2017-11-12.22:29:02.776>
labels = ['interpreter-core', 'type-feature', '3.7']
title = 'Disallow ambiguous syntax f(x for x in [1],)'
updated_at = <Date 2018-07-31.06:52:51.418>
user = 'https://github.com/serhiy-storchaka'

bugs.python.org fields:

activity = <Date 2018-07-31.06:52:51.418>
actor = 'miss-islington'
assignee = 'none'
closed = True
closed_date = <Date 2017-11-15.08:16:39.988>
closer = 'ncoghlan'
components = ['Interpreter Core']
creation = <Date 2017-11-12.22:29:02.776>
creator = 'serhiy.storchaka'
dependencies = []
files = []
hgrepos = []
issue_num = 32012
keywords = ['patch']
message_count = 24.0
messages = ['306132', '306145', '306149', '306159', '306160', '306161', '306179', '306185', '306198', '306199', '306200', '306204', '306206', '306207', '306208', '306209', '306211', '306212', '306213', '306233', '306255', '306256', '322730', '322733']
nosy_count = 7.0
nosy_names = ['gvanrossum', 'brett.cannon', 'ncoghlan', 'benjamin.peterson', 'serhiy.storchaka', 'cryvate', 'miss-islington']
pr_nums = ['4382', '4400', '8580']
priority = 'normal'
resolution = 'fixed'
stage = 'resolved'
status = 'closed'
superseder = None
type = 'enhancement'
url = 'https://bugs.python.org/issue32012'
versions = ['Python 3.7']