From 06baad91f96538f88112508817a0a6994c305406 Mon Sep 17 00:00:00 2001
From: Victor Stinner <victor.stinner@gmail.com>
Date: Tue, 12 Sep 2017 17:05:53 -0700
Subject: [PATCH] [3.6] bpo-31249: Fix test_concurrent_futures dangling thread
 (GH-3521)

ProcessPoolShutdownTest.test_del_shutdown() now closes the call queue
and joins its thread, to prevent leaking a dangling thread.
(cherry picked from commit 3bcf157c115ba3e48bce62ac8cb13c703475a113)
---
 Lib/test/test_concurrent_futures.py | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/Lib/test/test_concurrent_futures.py b/Lib/test/test_concurrent_futures.py
index 03f8d1d711227d..e5d6b7e09b5500 100644
--- a/Lib/test/test_concurrent_futures.py
+++ b/Lib/test/test_concurrent_futures.py
@@ -226,11 +226,14 @@ def test_del_shutdown(self):
         list(executor.map(abs, range(-5, 5)))
         queue_management_thread = executor._queue_management_thread
         processes = executor._processes
+        call_queue = executor._call_queue
         del executor
 
         queue_management_thread.join()
         for p in processes.values():
             p.join()
+        call_queue.close()
+        call_queue.join_thread()
 
 
 class WaitTests: