1 files changed, 25 insertions, 0 deletions
diff --git a/Lib/test/test_list.py b/Lib/test/test_list.py
index ece4598e4e..553ac8c1ce 100644
--- a/Lib/test/test_list.py
+++ b/Lib/test/test_list.py
@@ -162,6 +162,31 @@ class ListTest(list_tests.CommonTest):
         with self.assertRaises(TypeError):
             (3,) + L([1,2])
 
+    def test_equal_operator_modifying_operand(self):
+        # test fix for seg fault reported in bpo-38588 part 2.
+        class X:
+            def __eq__(self,other) :
+                list2.clear()
+                return NotImplemented
+
+        class Y:
+            def __eq__(self, other):
+                list1.clear()
+                return NotImplemented
+
+        class Z:
+            def __eq__(self, other):
+                list3.clear()
+                return NotImplemented
+
+        list1 = [X()]
+        list2 = [Y()]
+        self.assertTrue(list1 == list2)
+
+        list3 = [Z()]
+        list4 = [1]
+        self.assertFalse(list3 == list4)
+
     def test_count_index_remove_crashes(self):
         # bpo-38610: The count(), index(), and remove() methods were not
         # holding strong references to list elements while calling