New submission from Łukasz Langa <luk...@langa.pl>:
GH-23638 introduced a new test for Accept: headers in CGI HTTP servers. This
test serializes all of `os.environ` on the server side. For non-UTF8 locales
this can fail for some Unicode characters found in environment variables.
This started failing this week on Azure Pipelines with their rollout of a new
Windows 2019 image version that included a "BUILD_SOURCEVERSIONAUTHOR" env
variable. For me specifically it includes a leading Unicode character so all my
PRs started failing on Azure Pipelines Windows 2019 alone.
The result was truncated output from the CGI HTTP server, like:
======================================================================
FAIL: test_accept (test.test_httpservers.CGIHTTPServerTestCase)
[OrderedDict([('Accept',
'text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8')])]
----------------------------------------------------------------------
Traceback (most recent call last):
File "D:\a\1\s\lib\test\test_httpservers.py", line 860, in test_accept
self.assertIn(expected.encode('ascii'), res.read())
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
AssertionError: b"'HTTP_ACCEPT':
'text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8'" not found in
b''
The root cause is that the CGI script in question (`cgi_file6` in
test_httpservers.py) is crashing on server-side reaching the
`print(repr(os.environ))` line. However, this exception isn't visible on the
client side where the test is running. The only visible issue is truncated
output.
I suggest adding ENSURE_UNICODE_WORKS=Łukasz to the testing env so that this
never regresses.
----------
messages: 397572
nosy: lukasz.langa
priority: normal
severity: normal
status: open
title: Non-ASCII characters in os.environ cause silent failures in
test_httpservers
type: behavior
versions: Python 3.10, Python 3.11, Python 3.9
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Python tracker <rep...@bugs.python.org>
<https://bugs.python.org/issue44647>
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