New submission from Felix Yan <felixonmars at archlinux.org>:
I am packaging Python for Arch and the tests suite of Python 3.8.6 pass here without this:
```
0:09:06 load avg: 0.87 [205/424] test_lib2to3
test test_lib2to3 crashed -- Traceback (most recent call last):
File "/build/python/src/Python-3.9.0/Lib/test/libregrtest/runtest.py", line 270, in _runtest_inner
refleak = _runtest_inner2(ns, test_name)
File "/build/python/src/Python-3.9.0/Lib/test/libregrtest/runtest.py", line 221, in _runtest_inner2
the_module = importlib.import_module(abstest)
File "/build/python/src/Python-3.9.0/Lib/importlib/__init__.py", line 127, in import_module
return _bootstrap._gcd_import(name[level:], package, level)
File "<frozen importlib._bootstrap>", line 1030, in _gcd_import
File "<frozen importlib._bootstrap>", line 1007, in _find_and_load
File "<frozen importlib._bootstrap>", line 986, in _find_and_load_unlocked
File "<frozen importlib._bootstrap>", line 680, in _load_unlocked
File "<frozen importlib._bootstrap_external>", line 790, in exec_module
File "<frozen importlib._bootstrap>", line 228, in _call_with_frames_removed
File "/build/python/src/Python-3.9.0/Lib/test/test_lib2to3.py", line 5, in <module>
from lib2to3.tests import load_tests
File "/build/python/src/Python-3.9.0/Lib/contextlib.py", line 124, in __exit__
next(self.gen)
File "/build/python/src/Python-3.9.0/Lib/test/support/__init__.py", line 1171, in _filterwarnings
raise AssertionError("filter (%r, %s) did not catch any warning" %
AssertionError: filter ('', PendingDeprecationWarning) did not catch any warning
0:09:06 load avg: 0.87 [206/424/1] test_linecache -- test_lib2to3 failed
```
----------
components: Tests
messages: 378190
nosy: felixonmars
priority: normal
severity: normal
status: open
title: test_lib2to3 fails since Python 3.9
versions: Python 3.9
_______________________________________
Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue41970>
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