test.pythoninfo prints a stack trace and exits with 1 when the compiler does not exist

[xdegaye]

BPO	35952
Nosy	@vstinner, @xdegaye
PRs	bpo-35952: Fix pythoninfo when the compiler is missing #13007 [3.7] bpo-35952: Sync test.pythoninfo from master #13009 [2.7] bpo-35952: Sync test.pythoninfo from master #13010
Files	pythoninfo_api_24.txt

^{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 2019-04-29.13:21:29.442>
created_at = <Date 2019-02-09.21:06:05.137>
labels = ['3.7', '3.8', 'type-bug', 'library']
title = 'test.pythoninfo prints a stack trace and exits with 1 when the compiler does not exist'
updated_at = <Date 2019-04-29.13:21:29.433>
user = 'https://github.com/xdegaye'

bugs.python.org fields:

activity = <Date 2019-04-29.13:21:29.433>
actor = 'vstinner'
assignee = 'none'
closed = True
closed_date = <Date 2019-04-29.13:21:29.442>
closer = 'vstinner'
components = ['Library (Lib)']
creation = <Date 2019-02-09.21:06:05.137>
creator = 'xdegaye'
dependencies = []
files = ['48290']
hgrepos = []
issue_num = 35952
keywords = ['patch']
message_count = 5.0
messages = ['335139', '341068', '341074', '341077', '341078']
nosy_count = 2.0
nosy_names = ['vstinner', 'xdegaye']
pr_nums = ['13007', '13009', '13010']
priority = 'normal'
resolution = 'fixed'
stage = 'resolved'
status = 'closed'
superseder = None
type = 'behavior'
url = 'https://bugs.python.org/issue35952'
versions = ['Python 2.7', 'Python 3.7', 'Python 3.8']

[xdegaye]

The call to subprocess.Popen() in collect_cc() of Lib/test/pythoninfo.py raises an exception when the compiler that has been used to build python is not present on the host running python. In that case pythoninfo prints a stack trace and exits with an error.

On the other side if the execution of the compiler to get its version fails, the error is silently ignored. It seems the exception should be ignored as well.

[xdegaye]

Attached pythoninfo_api_24.txt, the output of pythoninfo for Android API 24 with PR 13007.

[vstinner]

New changeset a86e064 by Victor Stinner (xdegaye) in branch 'master':
bpo-35952: Fix test.pythoninfo when the compiler is missing (GH-13007)
a86e064

[vstinner]

New changeset 5e09a99 by Victor Stinner in branch '3.7':
bpo-35952: Sync test.pythoninfo from master (GH-13009)
5e09a99

[vstinner]

New changeset be6cbfb by Victor Stinner in branch '2.7':
bpo-35952: Sync test.pythoninfo from master (GH-13010)
be6cbfb