bpo-32126: Skip asyncio test when sem_open() is not functional (GH-4559)

Lib/test/test_asyncio/test_events.py

@@ -2155,6 +2155,10 @@ else:
             super().tearDown()
 
         def test_get_event_loop_new_process(self):
+            # Issue bpo-32126: The multiprocessing module used by
+            # ProcessPoolExecutor is not functional when the
+            # multiprocessing.synchronize module cannot be imported.
+            support.import_module('multiprocessing.synchronize')
             async def main():
                 pool = concurrent.futures.ProcessPoolExecutor()
                 result = await self.loop.run_in_executor(

Misc/NEWS.d/next/Tests/2017-11-24-18-15-12.bpo-32126.PLmNLn.rst

+Skip test_get_event_loop_new_process in test.test_asyncio.test_events when
+sem_open() is not functional.