Issue #26202: copy.deepcopy() now correctly copies range() objects with

non-atomic attributes.

1 files changed, 12 insertions, 1 deletions

diff --git a/Lib/test/test_copy.py b/Lib/test/test_copy.py
index 4107e8afd6..7912c7cd69 100644
--- a/Lib/test/test_copy.py
+++ b/Lib/test/test_copy.py
@@ -314,7 +314,7 @@ class TestCopy(unittest.TestCase):
             pass
         tests = [None, 42, 2**100, 3.14, True, False, 1j,
                  "hello", "hello\u1234", f.__code__,
-                 NewStyle, range(10), Classic, max]
+                 NewStyle, Classic, max]
         for x in tests:
             self.assertIs(copy.deepcopy(x), x)
 
@@ -536,6 +536,17 @@ class TestCopy(unittest.TestCase):
         self.assertIsNot(y, x)
         self.assertIs(y.foo, y)
 
+    def test_deepcopy_range(self):
+        class I(int):
+            pass
+        x = range(I(10))
+        y = copy.deepcopy(x)
+        self.assertIsNot(y, x)
+        self.assertEqual(y, x)
+        self.assertIsNot(y.stop, x.stop)
+        self.assertEqual(y.stop, x.stop)
+        self.assertIsInstance(y.stop, I)
+
     # _reconstruct()
 
     def test_reconstruct_string(self):