From 868b1afa05c7847e6ffdd1808916719b511b4bcc Mon Sep 17 00:00:00 2001
From: Dennis Sweeney <36520290+sweeneyde@users.noreply.github.com>
Date: Sat, 30 Apr 2022 14:35:33 -0400
Subject: gh-92063:  Enforce types in specialized PRECALL opcodes (GH-92068)

* Check the types of PRECALL_METHOD_DESCRIPTOR_FAST_WITH_KEYWORDS

* fix PRECALL_NO_KW_METHOD_DESCRIPTOR_NOARGS as well

* fix PRECALL_NO_KW_METHOD_DESCRIPTOR_O

* fix PRECALL_NO_KW_METHOD_DESCRIPTOR_FAST
---
 Lib/test/test_descr.py | 27 +++++++++++++++++++++++++++
 1 file changed, 27 insertions(+)

(limited to 'Lib/test/test_descr.py')

diff --git a/Lib/test/test_descr.py b/Lib/test/test_descr.py
index 378ff5227e..48d43d7af8 100644
--- a/Lib/test/test_descr.py
+++ b/Lib/test/test_descr.py
@@ -4726,6 +4726,33 @@ order (MRO) for bases """
         with self.assertRaises(TypeError):
             str.__add__(fake_str, "abc")
 
+    def test_specialized_method_calls_check_types(self):
+        # https://github.com/python/cpython/issues/92063
+        class Thing:
+            pass
+        thing = Thing()
+        for i in range(20):
+            with self.assertRaises(TypeError):
+                # PRECALL_METHOD_DESCRIPTOR_FAST_WITH_KEYWORDS
+                list.sort(thing)
+        for i in range(20):
+            with self.assertRaises(TypeError):
+                # PRECALL_METHOD_DESCRIPTOR_FAST_WITH_KEYWORDS
+                str.split(thing)
+        for i in range(20):
+            with self.assertRaises(TypeError):
+                # PRECALL_NO_KW_METHOD_DESCRIPTOR_NOARGS
+                str.upper(thing)
+        for i in range(20):
+            with self.assertRaises(TypeError):
+                # PRECALL_NO_KW_METHOD_DESCRIPTOR_FAST
+                str.strip(thing)
+        from collections import deque
+        for i in range(20):
+            with self.assertRaises(TypeError):
+                # PRECALL_NO_KW_METHOD_DESCRIPTOR_O
+                deque.append(thing, thing)
+
     def test_repr_as_str(self):
         # Issue #11603: crash or infinite loop when rebinding __str__ as
         # __repr__.
-- 
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