gh-90467: StreamReaderProtocol - add strong reference to created task (GH-96323)

(cherry picked from commit e860e521ec)

Co-authored-by: Kirill <iam@python273.pw>

Lib/asyncio/streams.py

@@ -206,6 +206,7 @@ class StreamReaderProtocol(FlowControlMixin, protocols.Protocol):
             self._strong_reader = stream_reader
         self._reject_connection = False
         self._stream_writer = None
+        self._task = None
         self._transport = None
         self._client_connected_cb = client_connected_cb
         self._over_ssl = False
@@ -241,7 +242,7 @@ class StreamReaderProtocol(FlowControlMixin, protocols.Protocol):
             res = self._client_connected_cb(reader,
                                             self._stream_writer)
             if coroutines.iscoroutine(res):
-                self._loop.create_task(res)
+                self._task = self._loop.create_task(res)
             self._strong_reader = None
 
     def connection_lost(self, exc):
@@ -259,6 +260,7 @@ class StreamReaderProtocol(FlowControlMixin, protocols.Protocol):
         super().connection_lost(exc)
         self._stream_reader_wr = None
         self._stream_writer = None
+        self._task = None
         self._transport = None
 
     def data_received(self, data):

Misc/ACKS

@@ -1428,6 +1428,7 @@ Ram Rachum
 Jeffrey Rackauckas
 Jérôme Radix
 Burton Radons
+Kirill (python273) R.
 Abhilash Raj
 Shorya Raj
 Dhushyanth Ramasamy
@@ -1966,6 +1967,7 @@ Gordon Worley
 Darren Worrall
 Thomas Wouters
 Daniel Wozniak
+Simon Wrede
 Marcin Niemira
 Wei Wu
 Heiko Wundram

Misc/NEWS.d/next/Library/2022-08-27-14-38-49.gh-issue-90467.VOOB0p.rst

@@ -0,0 +1,2 @@
+Fix :class:`asyncio.streams.StreamReaderProtocol` to keep a strong reference
+to the created task, so that it's not garbage collected