New submission from STINNER Victor:
test.support.import_module() catchs ModuleNotFoundError instead of ImportError
since the following changeset:
changeset: 84106:c4d7228421df
user: Brett Cannon <br...@python.org>
date: Wed Jun 12 20:12:30 2013 -0400
files: Lib/test/regrtest.py Lib/test/support.py Lib/test/test___all__.py
Lib/xmlrpc/server.py Lib/zipfile.py
description:
Move test___all__ over to unittest.main() and use ModuleNotFoundError
The problem is that multiprocessing.synchronize raises an ImportError if
_multiprocess.SemLock does not exist:
# Try to import the mp.synchronize module cleanly, if it fails
# raise ImportError for platforms lacking a working sem_open implementation.
# See issue 3770
try:
from X_multiprocessing import SemLock
except (ImportError):
raise ImportError("This platform lacks a functioning sem_open" +
" implementation, therefore, the required" +
" synchronization primitives needed will not" +
" function, see issue 3770.")
As a result, test_multiprocessing is no more skipped on FreeBSD 6.4, but the
following traceback is written:
http://buildbot.python.org/all/builders/x86%20FreeBSD%206.4%203.x/builds/3771/steps/test/logs/stdio
Re-running test 'test_multiprocessing' in verbose mode
test test_multiprocessing crashed -- Traceback (most recent call last):
File
"/usr/home/db3l/buildarea/3.x.bolen-freebsd/build/Lib/multiprocessing/synchronize.py",
line 27, in <module>
from _multiprocessing import SemLock
ModuleNotFoundError: cannot import name SemLock
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/usr/home/db3l/buildarea/3.x.bolen-freebsd/build/Lib/test/regrtest.py",
line 1300, in runtest_inner
the_module = importlib.import_module(abstest)
File
"/usr/home/db3l/buildarea/3.x.bolen-freebsd/build/Lib/importlib/__init__.py",
line 93, in import_module
return _bootstrap._gcd_import(name[level:], package, level)
File "<frozen importlib._bootstrap>", line 1614, in _gcd_import
File "<frozen importlib._bootstrap>", line 1595, in _find_and_load
File "<frozen importlib._bootstrap>", line 1562, in _find_and_load_unlocked
File "<frozen importlib._bootstrap>", line 609, in _check_name_wrapper
File "<frozen importlib._bootstrap>", line 1058, in load_module
File "<frozen importlib._bootstrap>", line 928, in load_module
File "<frozen importlib._bootstrap>", line 274, in _call_with_frames_removed
File
"/usr/home/db3l/buildarea/3.x.bolen-freebsd/build/Lib/test/test_multiprocessing.py",
line 30, in <module>
test.support.import_module('multiprocessing.synchronize')
File "/usr/home/db3l/buildarea/3.x.bolen-freebsd/build/Lib/test/support.py",
line 123, in import_module
return importlib.import_module(name)
File
"/usr/home/db3l/buildarea/3.x.bolen-freebsd/build/Lib/importlib/__init__.py",
line 93, in import_module
return _bootstrap._gcd_import(name[level:], package, level)
File "<frozen importlib._bootstrap>", line 1614, in _gcd_import
File "<frozen importlib._bootstrap>", line 1595, in _find_and_load
File "<frozen importlib._bootstrap>", line 1562, in _find_and_load_unlocked
File "<frozen importlib._bootstrap>", line 609, in _check_name_wrapper
File "<frozen importlib._bootstrap>", line 1058, in load_module
File "<frozen importlib._bootstrap>", line 928, in load_module
File "<frozen importlib._bootstrap>", line 274, in _call_with_frames_removed
File
"/usr/home/db3l/buildarea/3.x.bolen-freebsd/build/Lib/multiprocessing/synchronize.py",
line 32, in <module>
" function, see issue 3770.")
ImportError: This platform lacks a functioning sem_open implementation,
therefore, the required synchronization primitives needed will not function,
see issue 3770.
----------
messages: 191876
nosy: brett.cannon, haypo, sbt
priority: normal
severity: normal
status: open
title: test_multiprocessing: test.support.import_module() does not ignore the
ImportError on SemLock
versions: Python 3.4
_______________________________________
Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue18302>
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