From: Kumar Aditya <59607654+kumaraditya303@users.noreply.github.com>
Date: Sat, 22 Oct 2022 16:11:27 +0000 (+0530)
Subject: GH-98539: fix ref cycle in `_SSLProtocolTransport` after close  (#98540)
X-Git-Tag: v3.12.0a1~23
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=62bf5d8d0a36112619436a813ceefb7e4af52c24;p=thirdparty%2FPython%2Fcpython.git

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

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: