From 6b973747f3c5e31afd89f6a7d79bc9f3f1628710 Mon Sep 17 00:00:00 2001
From: Andrew Svetlov <andrew.svetlov@gmail.com>
Date: Sat, 3 Nov 2012 15:36:01 +0200
Subject: Issue #16284: Prevent keeping unnecessary references to worker
 functions in concurrent.futures ThreadPoolExecutor.

---
 Lib/concurrent/futures/thread.py | 2 ++
 1 file changed, 2 insertions(+)

(limited to 'Lib/concurrent/futures/thread.py')

diff --git a/Lib/concurrent/futures/thread.py b/Lib/concurrent/futures/thread.py
index 95bb682565..f9beb0f7f7 100644
--- a/Lib/concurrent/futures/thread.py
+++ b/Lib/concurrent/futures/thread.py
@@ -63,6 +63,8 @@ def _worker(executor_reference, work_queue):
             work_item = work_queue.get(block=True)
             if work_item is not None:
                 work_item.run()
+                # Delete references to object. See issue16284
+                del work_item
                 continue
             executor = executor_reference()
             # Exit if:
-- 
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