From bd98645cfe41dca15a9b11941c3312cc2599b248 Mon Sep 17 00:00:00 2001
From: Itamar Ostricher <itamarost@gmail.com>
Date: Mon, 2 May 2022 14:55:16 -0600
Subject: [PATCH] Check for overridden vectorcall field on PyFunctionObject

---
 Objects/funcobject.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/Objects/funcobject.c b/Objects/funcobject.c
index 32b4155c03e6ae..6eee00e7b9414c 100644
--- a/Objects/funcobject.c
+++ b/Objects/funcobject.c
@@ -134,6 +134,9 @@ uint32_t _PyFunction_GetVersionForCurrentState(PyFunctionObject *func)
     if (func->func_version != 0) {
         return func->func_version;
     }
+    if (func->vectorcall != _PyFunction_Vectorcall) {
+        return 0;
+    }
     if (next_func_version == 0) {
         return 0;
     }