don't segfault on deleting __abstractmethods__ #10892
diff --git a/Lib/test/test_descr.py b/Lib/test/test_descr.py
index a81c218..914b249 100644
--- a/Lib/test/test_descr.py
+++ b/Lib/test/test_descr.py
@@ -4224,12 +4224,16 @@
 
         self.assertRaises(AttributeError, getattr, EvilGetattribute(), "attr")
 
-    def test_type_has_no_abstractmethods(self):
+    def test_abstractmethods(self):
         # type pretends not to have __abstractmethods__.
         self.assertRaises(AttributeError, getattr, type, "__abstractmethods__")
         class meta(type):
             pass
         self.assertRaises(AttributeError, getattr, meta, "__abstractmethods__")
+        class X(object):
+            pass
+        with self.assertRaises(AttributeError):
+            del X.__abstractmethods__
 
 
 class DictProxyTests(unittest.TestCase):