From: Miss Islington (bot) <31488909+miss-islington@users.noreply.github.com>
Date: Thu, 6 Oct 2022 19:09:50 +0000 (-0700)
Subject: [3.11] GH-88050: fix race in closing subprocess pipe in asyncio  (GH-97951) (#97978)
X-Git-Tag: v3.11.1~342
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=bd3dcb3549e9c1c26495bc3cc1a45197079bdcaf;p=thirdparty%2FPython%2Fcpython.git

[3.11] GH-88050: fix race in closing subprocess pipe in asyncio  (GH-97951) (#97978)

Check for None when iterating over `self._pipes.values()`.
(cherry picked from commit e2e6b95c0342247ed1a761b6e149ac579a8722dd)

Co-authored-by: Kumar Aditya <59607654+kumaraditya303@users.noreply.github.com>
---

diff --git a/Lib/asyncio/base_subprocess.py b/Lib/asyncio/base_subprocess.py
index c2ca4a2792f6..e15bb4141fc0 100644
--- a/Lib/asyncio/base_subprocess.py
+++ b/Lib/asyncio/base_subprocess.py
@@ -216,7 +216,9 @@ class BaseSubprocessTransport(transports.SubprocessTransport):
             self._proc.returncode = returncode
         self._call(self._protocol.process_exited)
         for p in self._pipes.values():
-            p.pipe.close()
+            if p is not None:
+                p.pipe.close()
+
         self._try_finish()
 
     async def _wait(self):