possible null pointer dereference in pystate.c

BPO	34408
Nosy	@vstinner, @markshannon, @ericsnowcurrently, @pablogsal
PRs	bpo-34408: Prevent a null pointer derefence and resource leakage in `pystate.c` #8767 [3.7] bpo-34408: Prevent a null pointer dereference and resource leakage in `PyInterpreterState_New()` (GH-8767) #13237

^{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 2019-05-10.20:16:48.630>
created_at = <Date 2018-08-14.20:09:38.710>
labels = ['interpreter-core', '3.8', 'type-crash']
title = 'possible null pointer dereference in pystate.c'
updated_at = <Date 2019-05-10.21:31:16.997>
user = 'https://github.com/pablogsal'

bugs.python.org fields:

activity = <Date 2019-05-10.21:31:16.997>
actor = 'vstinner'
assignee = 'none'
closed = True
closed_date = <Date 2019-05-10.20:16:48.630>
closer = 'pablogsal'
components = ['Interpreter Core']
creation = <Date 2018-08-14.20:09:38.710>
creator = 'pablogsal'
dependencies = []
files = []
hgrepos = []
issue_num = 34408
keywords = ['patch']
message_count = 7.0
messages = ['323538', '324444', '341780', '342040', '342127', '342128', '342137']
nosy_count = 4.0
nosy_names = ['vstinner', 'Mark.Shannon', 'eric.snow', 'pablogsal']
pr_nums = ['8767', '13237']
priority = 'normal'
resolution = 'fixed'
stage = 'resolved'
status = 'closed'
superseder = None
type = 'crash'
url = 'https://bugs.python.org/issue34408'
versions = ['Python 3.8']