From a9b6033179b64b985394ad351501089a6a94fc9d Mon Sep 17 00:00:00 2001
From: Ben Harper <btharper1221@gmail.com>
Date: Tue, 10 Sep 2019 11:20:15 -0400
Subject: [PATCH] bpo-36253: Remove use after free reference in ctypes test
 suite (GH-12257)

---
 Lib/ctypes/test/test_stringptr.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/Lib/ctypes/test/test_stringptr.py b/Lib/ctypes/test/test_stringptr.py
index 95cd1614c6..c20951f4ce 100644
--- a/Lib/ctypes/test/test_stringptr.py
+++ b/Lib/ctypes/test/test_stringptr.py
@@ -70,8 +70,8 @@ class StringPtrTestCase(unittest.TestCase):
         x = r[0], r[1], r[2], r[3], r[4]
         self.assertEqual(x, (b"c", b"d", b"e", b"f", b"\000"))
         del buf
-        # x1 will NOT be the same as x, usually:
-        x1 = r[0], r[1], r[2], r[3], r[4]
+        # Because r is a pointer to memory that is freed after deleting buf,
+        # the pointer is hanging and using it would reference freed memory.
 
 if __name__ == '__main__':
     unittest.main()
-- 
2.50.1