Unpickling objects with recursive references and partials fail due to incomplete state passed to __setstate__

GitHub fields:

assignee = None
closed_at = None
created_at = <Date 2018-04-09.12:37:25.064>
labels = ['interpreter-core', 'type-bug']
title = 'Unpickling objects with recursive references and partials fail due to incomplete state passed to __setstate__'
updated_at = <Date 2018-04-09.15:31:56.040>
user = 'https://github.com/aleneum'

bugs.python.org fields:

activity = <Date 2018-04-09.15:31:56.040>
actor = 'aleneum'
assignee = 'none'
closed = False
closed_date = None
closer = None
components = ['Interpreter Core']
creation = <Date 2018-04-09.12:37:25.064>
creator = 'aleneum'
dependencies = []
files = []
hgrepos = []
issue_num = 33249
keywords = []
message_count = 2.0
messages = ['315127', '315130']
nosy_count = 1.0
nosy_names = ['aleneum']
pr_nums = []
priority = 'normal'
resolution = None
stage = None
status = 'open'
superseder = None
type = 'behavior'
url = 'https://bugs.python.org/issue33249'
versions = ['Python 3.4', 'Python 3.5', 'Python 3.6']