test_get_event_loop_new_process fails on Android API 24 with the error: ====================================================================== ERROR: test_get_event_loop_new_process (test.test_asyncio.test_events.EPollEventLoopTests) ---------------------------------------------------------------------- Traceback (most recent call last): File "/sdcard/org.python/lib/python3.7/multiprocessing/synchronize.py", line 29, in <module> from _multiprocessing import SemLock, sem_unlink ImportError: cannot import name 'sem_unlink' from '_multiprocessing' (/data/local/tmp/python/lib/pyt hon3.7/lib-dynload/_multiprocessing.cpython-37dm.so) During handling of the above exception, another exception occurred: Traceback (most recent call last): File "/sdcard/org.python/lib/python3.7/test/test_asyncio/test_events.py", line 2239, in test_get_e vent_loop_new_process self.loop.run_until_complete(main()), File "/sdcard/org.python/lib/python3.7/asyncio/base_events.py", line 466, in run_until_complete return future.result() File "/sdcard/org.python/lib/python3.7/test/test_asyncio/test_events.py", line 2230, in main pool = concurrent.futures.ProcessPoolExecutor() File "/sdcard/org.python/lib/python3.7/concurrent/futures/process.py", line 410, in __init__ self._call_queue = mp_context.Queue(queue_size) File "/sdcard/org.python/lib/python3.7/multiprocessing/context.py", line 102, in Queue return Queue(maxsize, ctx=self.get_context()) File "/sdcard/org.python/lib/python3.7/multiprocessing/queues.py", line 42, in __init__ self._rlock = ctx.Lock() File "/sdcard/org.python/lib/python3.7/multiprocessing/context.py", line 66, in Lock from .synchronize import Lock File "/sdcard/org.python/lib/python3.7/multiprocessing/synchronize.py", line 34, in <module> " function, see issue 3770.") ImportError: This platform lacks a functioning sem_open implementation, therefore, the required sync hronization primitives needed will not function, see issue 3770.

See also the related issues: #3770: test_multiprocessing fails on systems with HAVE_SEM_OPEN=0 #28668: instanciation of multiprocessing.Queue raises ImportError in test_logging #26924: android: test_concurrent_futures fails

 New changeset a6fba9b827e395fc9583c07bc2d15cd11f684439 by xdegaye in branch 'master': bpo-32126: Skip asyncio test when sem_open() is not functional (GH-4559) https://github.com/python/cpython/commit/a6fba9b827e395fc9583c07bc2d15cd11f684439