2.7 modern compiler warnings

[benjaminp]

BPO	38730
Nosy	@benjaminp
PRs	[2.7] bpo-38730: Fix -Wstringop-truncation warnings. #17075 [2.7] bpo-38730: Remove usage of stpncpy as it's not supported on MSVC 2008. #17081 [2.7] bpo-38730: Replace strncpy in import.c with memcpy. #17633

^{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 2019-11-08.03:31:29.550>
created_at = <Date 2019-11-07.04:53:19.425>
labels = ['build']
title = '2.7 modern compiler warnings'
updated_at = <Date 2019-12-17.00:40:03.917>
user = 'https://github.com/benjaminp'

bugs.python.org fields:

activity = <Date 2019-12-17.00:40:03.917>
actor = 'benjamin.peterson'
assignee = 'none'
closed = True
closed_date = <Date 2019-11-08.03:31:29.550>
closer = 'benjamin.peterson'
components = ['Build']
creation = <Date 2019-11-07.04:53:19.425>
creator = 'benjamin.peterson'
dependencies = []
files = []
hgrepos = []
issue_num = 38730
keywords = ['patch']
message_count = 4.0
messages = ['356166', '356191', '356192', '358528']
nosy_count = 1.0
nosy_names = ['benjamin.peterson']
pr_nums = ['17075', '17081', '17633']
priority = 'normal'
resolution = 'fixed'
stage = 'resolved'
status = 'closed'
superseder = None
type = None
url = 'https://bugs.python.org/issue38730'
versions = ['Python 2.7']

[benjaminp]

GCC 9's -Wstringop-truncation warnings trigger several times in 2.7. Some of these instances are all actual bugs. In all cases, we should clarify the code to make the compiler happy.

[benjaminp]

New changeset f32bcf8 by Benjamin Peterson in branch '2.7':
[2.7] bpo-38730: Fix -Wstringop-truncation warnings. (GH-17075)
f32bcf8

[benjaminp]

New changeset 9f94e52 by Benjamin Peterson in branch '2.7':
bpo-38730: Remove usage of stpncpy as it's not supported on MSVC 2008. (GH-17081)
9f94e52

[benjaminp]

New changeset 052f47e by Benjamin Peterson in branch '2.7':
bpo-38730: Replace strncpy in import.c with memcpy. (GH-17633)
052f47e