@@ -1202,6 +1202,7 @@ def _reset_empty_waiter(self):
 
     def close(self):
         self._read_ready_cb = None
+        self._write_ready = None
         super().close()
 
 
 
@@ -615,6 +615,7 @@ Marius Gedminas
 Jan-Philip Gehrcke
 Thomas Gellekum
 Gabriel Genellina
+Andrew Geng
 Philip Georgi
 Christos Georgiou
 Elazar (אלעזר) Gershuni
 
@@ -0,0 +1,2 @@
+Fix ref cycle in :class:`!asyncio._SelectorSocketTransport` by removing
+``_write_ready`` in ``close``.
Original file line number	Diff line number	Diff line change
@@ -0,0 +1,2 @@
	1	+ Fix ref cycle in :class:`!asyncio._SelectorSocketTransport` by removing
	2	+ ``_write_ready`` in ``close``.