From 91ce3aca9c20299a4a1a5a4a4736d648059ff30e Mon Sep 17 00:00:00 2001
From: "Miss Islington (bot)"
 <31488909+miss-islington@users.noreply.github.com>
Date: Thu, 10 Aug 2023 02:24:22 -0700
Subject: [PATCH] [3.12] GH-106684:  Close `asyncio.StreamWriter` when
 `asyncio.StreamWriter` is not closed by application (GH-107650) (GH-107656)

GH-106684: raise `ResourceWarning` when `asyncio.StreamWriter` is not closed (GH-107650)
(cherry picked from commit 41178e41995992bbe417f94bce158de93f9e3188)

(cherry picked from commit 7853c769067699c79c0d4fe4967e9d8f8b8b0a5e)

Co-authored-by: Miss Islington (bot) <31488909+miss-islington@users.noreply.github.com>
Co-authored-by: Kumar Aditya <kumaraditya@python.org>
Co-authored-by: Kumar Aditya <59607654+kumaraditya303@users.noreply.github.com>
---
 Lib/asyncio/streams.py                                        | 4 ++++
 .../Library/2023-08-05-05-10-41.gh-issue-106684.P9zRXb.rst    | 1 +
 2 files changed, 5 insertions(+)
 create mode 100644 Misc/NEWS.d/next/Library/2023-08-05-05-10-41.gh-issue-106684.P9zRXb.rst

diff --git a/Lib/asyncio/streams.py b/Lib/asyncio/streams.py
index 560ad8a8510e55..3d577f127041aa 100644
--- a/Lib/asyncio/streams.py
+++ b/Lib/asyncio/streams.py
@@ -391,6 +391,10 @@ async def start_tls(self, sslcontext, *,
         self._transport = new_transport
         protocol._replace_writer(self)
 
+    def __del__(self):
+        if not self._transport.is_closing():
+            self.close()
+
 
 class StreamReader:
 
diff --git a/Misc/NEWS.d/next/Library/2023-08-05-05-10-41.gh-issue-106684.P9zRXb.rst b/Misc/NEWS.d/next/Library/2023-08-05-05-10-41.gh-issue-106684.P9zRXb.rst
new file mode 100644
index 00000000000000..85bce76229853f
--- /dev/null
+++ b/Misc/NEWS.d/next/Library/2023-08-05-05-10-41.gh-issue-106684.P9zRXb.rst
@@ -0,0 +1 @@
+Close :class:`asyncio.StreamWriter` when it is not closed by application leading to memory leaks. Patch by Kumar Aditya.