From cbdf1ce2a1f68abbc64729e9026e312fb858e3c6 Mon Sep 17 00:00:00 2001
From: Aditya Pillai <dev@pillai.io>
Date: Mon, 10 Mar 2025 14:03:41 -0400
Subject: [PATCH] Use Py_REFCNT instead of ->ob_refcnt

Py_REFCNT was stabilized in 3.9, uses this official API instead of the
`ob_refcnt` field that doesn't exist in the free-threaded build of 3.13.
---
 src/converter/from_python.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/converter/from_python.cpp b/src/converter/from_python.cpp
index 9678be1c..589d99ef 100644
--- a/src/converter/from_python.cpp
+++ b/src/converter/from_python.cpp
@@ -222,7 +222,7 @@ namespace
       , char const* ref_type)
   {
       handle<> holder(source);
-      if (source->ob_refcnt <= 1)
+      if (Py_REFCNT(source) <= 1)
       {
           handle<> msg(
 #if PY_VERSION_HEX >= 0x3000000