From 7d1fbecd6a27a3693e05541ffc62b7885edfd8b3 Mon Sep 17 00:00:00 2001
From: "Miss Islington (bot)"
 <31488909+miss-islington@users.noreply.github.com>
Date: Fri, 15 Dec 2017 08:26:46 -0800
Subject: [PATCH] bpo-32294: Fix multiprocessing test_semaphore_tracker()
 (GH-4885) (#4887)

Run the child process with -E option to ignore the PYTHONWARNINGS
environment variable.
(cherry picked from commit 9402c8367bf6ada1b84f620ad957750c33adbaf9)
---
 Lib/test/_test_multiprocessing.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Lib/test/_test_multiprocessing.py b/Lib/test/_test_multiprocessing.py
index 774e797f02..e4d60f8804 100644
--- a/Lib/test/_test_multiprocessing.py
+++ b/Lib/test/_test_multiprocessing.py
@@ -4146,7 +4146,7 @@ class TestSemaphoreTracker(unittest.TestCase):
         '''
         r, w = os.pipe()
         p = subprocess.Popen([sys.executable,
-                             '-c', cmd % (w, w)],
+                             '-E', '-c', cmd % (w, w)],
                              pass_fds=[w],
                              stderr=subprocess.PIPE)
         os.close(w)
-- 
2.40.0