GH-88050: fix race in closing subprocess pipe in asyncio (#97951)

Check for None when iterating over `self._pipes.values()`.
python · Oct 6, 2022 · e2e6b95 · e2e6b95
1 parent f612565
commit e2e6b95
Showing 1 changed file with 3 additions and 1 deletion.
diff --git a/Lib/asyncio/base_subprocess.py b/Lib/asyncio/base_subprocess.py
@@ -216,7 +216,9 @@ def _process_exited(self, returncode):
             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):