bpo-41052: Opt out serialization/deserialization for _random.Random (GH-21002)

1 files changed, 10 insertions, 0 deletions

diff --git a/Lib/test/test_random.py b/Lib/test/test_random.py
index a3710f4aa48..a80e71e67e4 100644
--- a/Lib/test/test_random.py
+++ b/Lib/test/test_random.py
@@ -5,6 +5,8 @@ import os
 import time
 import pickle
 import warnings
+import test.support
+
 from functools import partial
 from math import log, exp, pi, fsum, sin, factorial
 from test import support
@@ -372,6 +374,14 @@ class TestBasicOps:
             restoredseq = [newgen.random() for i in range(10)]
             self.assertEqual(origseq, restoredseq)
 
+    @test.support.cpython_only
+    def test_bug_41052(self):
+        # _random.Random should not be allowed to serialization
+        import _random
+        for proto in range(pickle.HIGHEST_PROTOCOL + 1):
+            r = _random.Random()
+            self.assertRaises(TypeError, pickle.dumps, r, proto)
+
     def test_bug_1727780(self):
         # verify that version-2-pickles can be loaded
         # fine, whether they are created on 32-bit or 64-bit