gh-106503: asyncio._SelectorSocketTransport: fix cyclic reference on close(). (#106504)

diff --git a/Lib/asyncio/selector_events.py b/Lib/asyncio/selector_events.py
index fa2422b7fba4a734d488c180833d3e1dd9adfe5f..f895750e3cf959ddada275b4276068f713617033 100644 (file)
--- a/Lib/asyncio/selector_events.py
+++ b/Lib/asyncio/selector_events.py
@@ -1202,6 +1202,7 @@ class _SelectorSocketTransport(_SelectorTransport):
 
     def close(self):
         self._read_ready_cb = None
+        self._write_ready = None
         super().close()
 
 

diff --git a/Misc/ACKS b/Misc/ACKS
index 454b63155f013c9819ea85d20f438aecfdf9b5a1..ef0029a7e4119d733b705114d6fedfbdfe88285e 100644 (file)
--- a/Misc/ACKS
+++ b/Misc/ACKS
@@ -615,6 +615,7 @@ Marius Gedminas
 Jan-Philip Gehrcke
 Thomas Gellekum
 Gabriel Genellina
+Andrew Geng
 Philip Georgi
 Christos Georgiou
 Elazar (אלעזר) Gershuni

diff --git a/Misc/NEWS.d/next/Library/2023-07-07-03-05-58.gh-issue-106503.ltfeiH.rst b/Misc/NEWS.d/next/Library/2023-07-07-03-05-58.gh-issue-106503.ltfeiH.rst
new file mode 100644 (file)
index 0000000..b8dd850
--- /dev/null
+++ b/Misc/NEWS.d/next/Library/2023-07-07-03-05-58.gh-issue-106503.ltfeiH.rst
@@ -0,0 +1,2 @@
+Fix ref cycle in :class:`!asyncio._SelectorSocketTransport` by removing
+``_write_ready`` in ``close``.