Issue #11127: Raise a TypeError when trying to pickle a socket object.

1 files changed, 7 insertions, 0 deletions

diff --git a/Lib/test/test_socket.py b/Lib/test/test_socket.py
index d761a73f2f..8b23ae9924 100644
--- a/Lib/test/test_socket.py
+++ b/Lib/test/test_socket.py
@@ -18,6 +18,7 @@ import contextlib
 from weakref import proxy
 import signal
 import math
+import pickle
 try:
     import fcntl
 except ImportError:
@@ -764,6 +765,12 @@ class GeneralModuleTests(unittest.TestCase):
             fp.close()
             self.assertEqual(repr(fp), "<_io.BufferedReader name=-1>")
 
+    def test_pickle(self):
+        sock = socket.socket()
+        with sock:
+            for protocol in range(pickle.HIGHEST_PROTOCOL + 1):
+                self.assertRaises(TypeError, pickle.dumps, sock, protocol)
+
 
 @unittest.skipUnless(thread, 'Threading required for this test.')
 class BasicTCPTest(SocketConnectedTest):