__length_hint__ isn't a hint for list()

GitHub fields:

assignee = None
closed_at = None
created_at = <Date 2016-12-11.20:53:16.843>
labels = ['interpreter-core']
title = "__length_hint__ isn't a hint for list()"
updated_at = <Date 2018-08-02.19:00:20.255>
user = 'https://github.com/ronaldoussoren'

bugs.python.org fields:

activity = <Date 2018-08-02.19:00:20.255>
actor = 'sir-sigurd'
assignee = 'none'
closed = False
closed_date = None
closer = None
components = ['Interpreter Core']
creation = <Date 2016-12-11.20:53:16.843>
creator = 'ronaldoussoren'
dependencies = []
files = []
hgrepos = []
issue_num = 28940
keywords = ['patch']
message_count = 1.0
messages = ['282946']
nosy_count = 1.0
nosy_names = ['ronaldoussoren']
pr_nums = ['8635']
priority = 'normal'
resolution = None
stage = 'patch review'
status = 'open'
superseder = None
type = None
url = 'https://bugs.python.org/issue28940'
versions = ['Python 3.5', 'Python 3.6']