_PyTime_FromDouble() fails to detect an integer overflow when converting a C double to a C int64_t

graingert

BPO	39277
Nosy	@tim-one, @vstinner, @benjaminp, @skrah, @graingert
PRs	bpo-39277, pytime: Fix overflow check on double to int cast #17933 bpo-39277: Fix PY_TIMEOUT_MAX cast in _threadmodule.c #31195

^{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 = None
created_at = <Date 2020-01-09.14:43:45.587>
labels = ['3.8', 'type-bug', '3.7']
title = '_PyTime_FromDouble() fails to detect an integer overflow when converting a C double to a C int64_t'
updated_at = <Date 2022-02-07.15:21:14.076>
user = 'https://github.com/graingert'

bugs.python.org fields:

activity = <Date 2022-02-07.15:21:14.076>
actor = 'vstinner'
assignee = 'none'
closed = False
closed_date = None
closer = None
components = []
creation = <Date 2020-01-09.14:43:45.587>
creator = 'graingert'
dependencies = []
files = []
hgrepos = []
issue_num = 39277
keywords = ['patch']
message_count = 8.0
messages = ['359682', '359683', '359710', '359728', '364021', '372294', '372335', '412754']
nosy_count = 5.0
nosy_names = ['tim.peters', 'vstinner', 'benjamin.peterson', 'skrah', 'graingert']
pr_nums = ['17933', '31195']
priority = 'normal'
resolution = None
stage = 'patch review'
status = 'open'
superseder = None
type = 'behavior'
url = 'https://bugs.python.org/issue39277'
versions = ['Python 3.7', 'Python 3.8']