From 3030774c40ca19bd946dead9780e1a2086a8579a Mon Sep 17 00:00:00 2001
From: Serhiy Storchaka <storchaka@gmail.com>
Date: Sat, 23 Sep 2023 11:21:05 +0300
Subject: [PATCH] gh-109370: Fix unexpected traceback output in
 test_concurrent_futures

Follow-up of gh-107219.

* Only close the connection writer on Windows.
* Also use existing constant _winapi.ERROR_OPERATION_ABORTED instead of
  WSA_OPERATION_ABORTED.
---
 Lib/concurrent/futures/process.py | 3 ++-
 Lib/multiprocessing/connection.py | 3 +--
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/Lib/concurrent/futures/process.py b/Lib/concurrent/futures/process.py
index 48d8db3ed423a5..011e79a5e73d5a 100644
--- a/Lib/concurrent/futures/process.py
+++ b/Lib/concurrent/futures/process.py
@@ -521,7 +521,8 @@ def terminate_broken(self, cause):
 
         # gh-107219: Close the connection writer which can unblock
         # Queue._feed() if it was stuck in send_bytes().
-        self.call_queue._writer.close()
+        if sys.platform == 'win32':
+            self.call_queue._writer.close()
 
         # clean up resources
         self.join_executor_internals()
diff --git a/Lib/multiprocessing/connection.py b/Lib/multiprocessing/connection.py
index 7c425a2d8e7034..dbbf106f680964 100644
--- a/Lib/multiprocessing/connection.py
+++ b/Lib/multiprocessing/connection.py
@@ -42,7 +42,6 @@
 BUFSIZE = 8192
 # A very generous timeout when it comes to local connections...
 CONNECTION_TIMEOUT = 20.
-WSA_OPERATION_ABORTED = 995
 
 _mmap_counter = itertools.count()
 
@@ -300,7 +299,7 @@ def _send_bytes(self, buf):
             finally:
                 self._send_ov = None
                 nwritten, err = ov.GetOverlappedResult(True)
-            if err == WSA_OPERATION_ABORTED:
+            if err == _winapi.ERROR_OPERATION_ABORTED:
                 # close() was called by another thread while
                 # WaitForMultipleObjects() was waiting for the overlapped
                 # operation.