From b8cf283e2eb07df6cfdbb7a2c396d1168f9c88ef Mon Sep 17 00:00:00 2001
From: Robert Haschke <rhaschke@techfak.uni-bielefeld.de>
Date: Sun, 16 Feb 2025 13:48:32 +0100
Subject: [PATCH] Assert PYBIND11_INTERNALS_VERSION >= 6

... when including smart_holder.h
---
 include/pybind11/smart_holder.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/include/pybind11/smart_holder.h b/include/pybind11/smart_holder.h
index 5f568a552..98db4f17d 100644
--- a/include/pybind11/smart_holder.h
+++ b/include/pybind11/smart_holder.h
@@ -5,6 +5,8 @@
 #pragma once
 
 #include "pybind11.h"
+static_assert(PYBIND11_INTERNALS_VERSION >= 6,
+              "pybind11 ABI version 6 is required for smart_holder functionality.");
 
 // Legacy macros introduced with smart_holder_type_casters implementation in 2021.
 // Deprecated.