fix test_complex for Windows arm64

[paulmon]

BPO	37236
Nosy	@pfmoore, @mdickinson, @tjguk, @zware, @zooba, @miss-islington, @paulmon
PRs	bpo-37236: pragma optimize off for _Py_c_quot on Windows arm64 #13983 [3.8] bpo-37236: pragma optimize off for _Py_c_quot on Windows arm64 (GH-13983) #14024

^{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 2019-06-27.20:37:15.665>
created_at = <Date 2019-06-11.17:19:02.625>
labels = ['build', '3.8', '3.9', 'OS-windows']
title = 'fix test_complex for Windows arm64'
updated_at = <Date 2019-06-27.20:37:15.664>
user = 'https://github.com/paulmon'

bugs.python.org fields:

activity = <Date 2019-06-27.20:37:15.664>
actor = 'Paul Monson'
assignee = 'none'
closed = True
closed_date = <Date 2019-06-27.20:37:15.665>
closer = 'Paul Monson'
components = ['Windows']
creation = <Date 2019-06-11.17:19:02.625>
creator = 'Paul Monson'
dependencies = []
files = []
hgrepos = []
issue_num = 37236
keywords = ['patch']
message_count = 3.0
messages = ['345254', '345396', '345400']
nosy_count = 7.0
nosy_names = ['paul.moore', 'mark.dickinson', 'tim.golden', 'zach.ware', 'steve.dower', 'miss-islington', 'Paul Monson']
pr_nums = ['13983', '14024']
priority = 'normal'
resolution = None
stage = 'resolved'
status = 'closed'
superseder = None
type = 'compile error'
url = 'https://bugs.python.org/issue37236'
versions = ['Python 3.8', 'Python 3.9']

[paulmon]

There is a compiler optimization error on Windows ARM64 that causes test_truediv (test.test_complex.ComplexTest) to fail with ZeroDivisionError: complex division by zero.

Adding a pragma optimize around the affected function fixes the issue. I am also submitting a report to the compiler team

[zooba]

New changeset ff6bb0a by Steve Dower (Paul Monson) in branch 'master':
bpo-37236: pragma optimize off for _Py_c_quot on Windows arm64 (GH-13983)
ff6bb0a

[miss-islington]

New changeset f72886a by Miss Islington (bot) in branch '3.8':
bpo-37236: pragma optimize off for _Py_c_quot on Windows arm64 (GH-13983)
f72886a