From b64334cb93d0ddbb551c8cd712942bab2fc72772 Mon Sep 17 00:00:00 2001
From: Mario Corchero <mcorcherojim@bloomberg.net>
Date: Fri, 6 Dec 2019 14:27:38 +0000
Subject: bpo-36820: Break unnecessary cycle in socket.py, codeop.py and
 dyld.py (GH-13135)

Break cycle generated when saving an exception in socket.py, codeop.py and dyld.py as they keep alive not only the exception but user objects through the ``__traceback__`` attribute.


https://bugs.python.org/issue36820



Automerge-Triggered-By: @pablogsal
---
 Lib/socket.py | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

(limited to 'Lib/socket.py')

diff --git a/Lib/socket.py b/Lib/socket.py
index 84a5dcb0da..374f1124bf 100755
--- a/Lib/socket.py
+++ b/Lib/socket.py
@@ -839,7 +839,11 @@ def create_connection(address, timeout=_GLOBAL_DEFAULT_TIMEOUT,
                 sock.close()
 
     if err is not None:
-        raise err
+        try:
+            raise err
+        finally:
+            # Break explicitly a reference cycle
+            err = None
     else:
         raise error("getaddrinfo returns an empty list")
 
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