From 62a8a0c5223f750e22ee381d3cfbdb718cf1cc93 Mon Sep 17 00:00:00 2001
From: Brandt Bucher <brandt@python.org>
Date: Thu, 16 Dec 2021 03:08:20 -0800
Subject: bpo-45829: Check `__getitem__`'s version for overflow before
 specializing (GH-30129)

* Check __getitem__'s version for overflow.

* Use SPEC_FAIL_OUT_OF_VERSIONS instead
---
 Python/specialize.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Python/specialize.c b/Python/specialize.c
index 7d4387b..730e2f0 100644
--- a/Python/specialize.c
+++ b/Python/specialize.c
@@ -1187,7 +1187,7 @@ _Py_Specialize_BinarySubscr(
         assert(cls->tp_version_tag != 0);
         cache0->version = cls->tp_version_tag;
         int version = _PyFunction_GetVersionForCurrentState(func);
-        if (version == 0) {
+        if (version == 0 || version != (uint16_t)version) {
             SPECIALIZATION_FAIL(BINARY_SUBSCR, SPEC_FAIL_OUT_OF_VERSIONS);
             goto fail;
         }
-- 
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