From 9698862ba465ea03107e7f74ff7806038d64ebfc Mon Sep 17 00:00:00 2001
From: Guido van Rossum <guido@python.org>
Date: Wed, 14 Sep 2022 18:22:20 -0700
Subject: [PATCH 1/3] When chaining futures, skip callback if loop closed

---
 Lib/asyncio/futures.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/Lib/asyncio/futures.py b/Lib/asyncio/futures.py
index 4bd9629e9eb62b..39776e3c2cce48 100644
--- a/Lib/asyncio/futures.py
+++ b/Lib/asyncio/futures.py
@@ -404,6 +404,8 @@ def _call_set_state(source):
         if dest_loop is None or dest_loop is source_loop:
             _set_state(destination, source)
         else:
+            if dest_loop.is_closed():
+                return
             dest_loop.call_soon_threadsafe(_set_state, destination, source)
 
     destination.add_done_callback(_call_check_cancel)

From 471792d2f63734207f105bf6bc9f4d594f662b5e Mon Sep 17 00:00:00 2001
From: Guido van Rossum <guido@python.org>
Date: Wed, 14 Sep 2022 18:35:02 -0700
Subject: [PATCH 2/3] When shutting down an executor, don't wake a closed loop

---
 Lib/asyncio/base_events.py | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/Lib/asyncio/base_events.py b/Lib/asyncio/base_events.py
index a675fff1688d27..c6cbfb5139d038 100644
--- a/Lib/asyncio/base_events.py
+++ b/Lib/asyncio/base_events.py
@@ -577,9 +577,11 @@ async def shutdown_default_executor(self):
     def _do_shutdown(self, future):
         try:
             self._default_executor.shutdown(wait=True)
-            self.call_soon_threadsafe(future.set_result, None)
+            if not self.is_closed():
+                self.call_soon_threadsafe(future.set_result, None)
         except Exception as ex:
-            self.call_soon_threadsafe(future.set_exception, ex)
+            if not self.is_closed():
+                self.call_soon_threadsafe(future.set_exception, ex)
 
     def _check_running(self):
         if self.is_running():

From a396ba6d132a2241609b64ff5fd2bdef5ac10816 Mon Sep 17 00:00:00 2001
From: "blurb-it[bot]" <43283697+blurb-it[bot]@users.noreply.github.com>
Date: Fri, 30 Sep 2022 15:56:23 +0000
Subject: [PATCH 3/3] =?UTF-8?q?=F0=9F=93=9C=F0=9F=A4=96=20Added=20by=20blu?=
 =?UTF-8?q?rb=5Fit.?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 .../next/Library/2022-09-30-15-56-20.gh-issue-96827.lzy1iw.rst   | 1 +
 1 file changed, 1 insertion(+)
 create mode 100644 Misc/NEWS.d/next/Library/2022-09-30-15-56-20.gh-issue-96827.lzy1iw.rst

diff --git a/Misc/NEWS.d/next/Library/2022-09-30-15-56-20.gh-issue-96827.lzy1iw.rst b/Misc/NEWS.d/next/Library/2022-09-30-15-56-20.gh-issue-96827.lzy1iw.rst
new file mode 100644
index 00000000000000..159ab32ffbfc34
--- /dev/null
+++ b/Misc/NEWS.d/next/Library/2022-09-30-15-56-20.gh-issue-96827.lzy1iw.rst
@@ -0,0 +1 @@
+Avoid spurious tracebacks from :mod:`asyncio` when default executor cleanup is delayed until after the event loop is closed (e.g. as the result of a keyboard interrupt).