Fix infinite loop releasing the connection when the writer is not finished

CHANGES/7798.bugfix

@@ -0,0 +1 @@
+Fix infinite loop releasing the connection when the writer is not finished

aiohttp/client_reqrep.py

@@ -916,10 +916,12 @@
             ):
                 return
 
+            self._cleanup_writer()
             self._release_connection()
+        else:
+            self._cleanup_writer()
 
         self._closed = True
-        self._cleanup_writer()
 
     @property
     def closed(self) -> bool:
@@ -968,13 +970,23 @@
                 headers=self.headers,
             )
 
+    def _cleanup_on_writer_done(self, _: "asyncio.Future[None]") -> None:
+        """Cleanup writer and release connection.
+
+        This is called as a callback when the writer finishes
+        in the event _release_connection was called
+        before the writer is done.
+        """
+        self._writer = None
+        self._release_connection()
+
     def _release_connection(self) -> None:
         if self._connection is not None:
             if self._writer is None:
                 self._connection.release()
                 self._connection = None
             else:
-                self._writer.add_done_callback(lambda f: self._release_connection())
+                self._writer.add_done_callback(self._cleanup_on_writer_done)
 
     async def _wait_released(self) -> None:
         if self._writer is not None: