gh-115618: Remove improper Py_XDECREFs in property methods (GH-115619)

1 files changed, 18 insertions, 0 deletions

diff --git a/Lib/test/test_property.py b/Lib/test/test_property.py
index 8ace9fd..ad5ab5a 100644
--- a/Lib/test/test_property.py
+++ b/Lib/test/test_property.py
@@ -183,6 +183,24 @@ class PropertyTests(unittest.TestCase):
             fake_prop.__init__('fget', 'fset', 'fdel', 'doc')
         self.assertAlmostEqual(gettotalrefcount() - refs_before, 0, delta=10)
 
+    @support.refcount_test
+    def test_gh_115618(self):
+        # Py_XDECREF() was improperly called for None argument
+        # in property methods.
+        gettotalrefcount = support.get_attribute(sys, 'gettotalrefcount')
+        prop = property()
+        refs_before = gettotalrefcount()
+        for i in range(100):
+            prop = prop.getter(None)
+        self.assertIsNone(prop.fget)
+        for i in range(100):
+            prop = prop.setter(None)
+        self.assertIsNone(prop.fset)
+        for i in range(100):
+            prop = prop.deleter(None)
+        self.assertIsNone(prop.fdel)
+        self.assertAlmostEqual(gettotalrefcount() - refs_before, 0, delta=10)
+
     def test_property_set_name_incorrect_args(self):
         p = property()