Issue #22995: Instances of extension types with a state that aren't

subclasses of list or dict and haven't implemented any pickle-related
methods (__reduce__, __reduce_ex__, __getnewargs__, __getnewargs_ex__,
or __getstate__), can no longer be pickled.  Including memoryview.

1 files changed, 15 insertions, 0 deletions

diff --git a/Lib/test/test_memoryview.py b/Lib/test/test_memoryview.py
index f14bafd..bc83247 100644
--- a/Lib/test/test_memoryview.py
+++ b/Lib/test/test_memoryview.py
@@ -10,6 +10,8 @@ import weakref
 import array
 from test import test_support
 import io
+import copy
+import pickle
 
 
 class AbstractMemoryTests:
@@ -354,6 +356,19 @@ class BytesMemorySliceSliceTest(unittest.TestCase,
     #pass
 
 
+class OtherTest(unittest.TestCase):
+    def test_copy(self):
+        m = memoryview(b'abc')
+        with self.assertRaises(TypeError):
+            copy.copy(m)
+
+    def test_pickle(self):
+        m = memoryview(b'abc')
+        for proto in range(pickle.HIGHEST_PROTOCOL + 1):
+            with self.assertRaises(TypeError):
+                pickle.dumps(m, proto)
+
+
 def test_main():
     test_support.run_unittest(__name__)