Issue #29392: Prevent crash when passing invalid arguments into msvcrt module.

1 files changed, 4 insertions, 4 deletions

diff --git a/Lib/multiprocessing/connection.py b/Lib/multiprocessing/connection.py
index d0a1b86b13..d49e8f0d32 100644
--- a/Lib/multiprocessing/connection.py
+++ b/Lib/multiprocessing/connection.py
@@ -20,11 +20,11 @@ import itertools
 
 import _multiprocessing
 
-from . import reduction
 from . import util
 
 from . import AuthenticationError, BufferTooShort
-from .reduction import ForkingPickler
+from .context import reduction
+_ForkingPickler = reduction.ForkingPickler
 
 try:
     import _winapi
@@ -203,7 +203,7 @@ class _ConnectionBase:
         """Send a (picklable) object"""
         self._check_closed()
         self._check_writable()
-        self._send_bytes(ForkingPickler.dumps(obj))
+        self._send_bytes(_ForkingPickler.dumps(obj))
 
     def recv_bytes(self, maxlength=None):
         """
@@ -248,7 +248,7 @@ class _ConnectionBase:
         self._check_closed()
         self._check_readable()
         buf = self._recv_bytes()
-        return ForkingPickler.loads(buf.getbuffer())
+        return _ForkingPickler.loads(buf.getbuffer())
 
     def poll(self, timeout=0.0):
         """Whether there is any input available to be read"""