From: Miss Islington (bot) <31488909+miss-islington@users.noreply.github.com>
Date: Mon, 24 Oct 2022 16:26:32 +0000 (-0700)
Subject: [3.11] GH-98539: fix ref cycle in `_SSLProtocolTransport` after close  (GH-98540... 
X-Git-Tag: v3.11.1~225
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=bd8b32b519055b5411e1954698e596d728fc848e;p=thirdparty%2FPython%2Fcpython.git

[3.11] GH-98539: fix ref cycle in `_SSLProtocolTransport` after close  (GH-98540) (#98551)

GH-98539: fix ref cycle in `_SSLProtocolTransport` after close  (GH-98540)
(cherry picked from commit 62bf5d8d0a36112619436a813ceefb7e4af52c24)

Co-authored-by: Kumar Aditya <59607654+kumaraditya303@users.noreply.github.com>
---

diff --git a/Lib/asyncio/sslproto.py b/Lib/asyncio/sslproto.py
index de00953cc1d0..5cb5cd35883f 100644
--- a/Lib/asyncio/sslproto.py
+++ b/Lib/asyncio/sslproto.py
@@ -107,8 +107,11 @@ class _SSLProtocolTransport(transports._FlowControlMixin,
         protocol's connection_lost() method will (eventually) called
         with None as its argument.
         """
-        self._closed = True
-        self._ssl_protocol._start_shutdown()
+        if not self._closed:
+            self._closed = True
+            self._ssl_protocol._start_shutdown()
+        else:
+            self._ssl_protocol = None
 
     def __del__(self, _warnings=warnings):
         if not self._closed: