Issue 18302: test_multiprocessing: test.support.import_module() does not ignore the ImportError on SemLock (original) (raw)

test.support.import_module() catchs ModuleNotFoundError instead of ImportError since the following changeset:

changeset: 84106:c4d7228421df user: Brett Cannon <brett@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 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 "", line 1614, in _gcd_import File "", line 1595, in _find_and_load File "", line 1562, in _find_and_load_unlocked File "", line 609, in _check_name_wrapper File "", line 1058, in load_module File "", line 928, in load_module File "", 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 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 "", line 1614, in _gcd_import File "", line 1595, in _find_and_load File "", line 1562, in _find_and_load_unlocked File "", line 609, in _check_name_wrapper File "", line 1058, in load_module File "", line 928, in load_module File "", line 274, in _call_with_frames_removed File "/usr/home/db3l/buildarea/3.x.bolen-freebsd/build/Lib/multiprocessing/synchronize.py", line 32, in " 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.