Do not retain references to processes and managers in TestSyncManagerTypes (GH-11801)

Keeping references to processes and managers between tests makes them count as dangling processes.

diff --git a/Lib/test/_test_multiprocessing.py b/Lib/test/_test_multiprocessing.py
index 2f839b952126a30a1effdf53e2fe103eaf345aa6..d3cb195077ae25acaf17c07f2e94de72b0ddc078 100644 (file)
--- a/Lib/test/_test_multiprocessing.py
+++ b/Lib/test/_test_multiprocessing.py
@@ -4740,6 +4740,8 @@ class TestSyncManagerTypes(unittest.TestCase):
             self.proc.terminate()
             self.proc.join()
         self.manager.shutdown()
+        self.manager = None
+        self.proc = None
 
     @classmethod
     def setUpClass(cls):