From 50dfc255b85b33d1ada64a887e1fa7d6eed0ca12 Mon Sep 17 00:00:00 2001
From: Yuval Tassa <tassa@google.com>
Date: Sun, 15 Mar 2026 12:45:44 -0700
Subject: [PATCH] Fix pybind11 v3.0 compatibility in callbacks.cc

PiperOrigin-RevId: 884074529
Change-Id: I20e7a8d6f6069895afbc3e18d0612f3b2edfaeb7
---
 python/mujoco/callbacks.cc | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/python/mujoco/callbacks.cc b/python/mujoco/callbacks.cc
index c6a99351..ea565127 100644
--- a/python/mujoco/callbacks.cc
+++ b/python/mujoco/callbacks.cc
@@ -91,8 +91,7 @@ static enable_if_not_const_t<Raw, py::handle> MjWrapperLookup(Raw* ptr) {
   // TODO(stunya): Figure out a way to do this without invoking py::detail.
   {
     py::gil_scoped_acquire gil;
-    const auto [src, type] =
-        py::detail::type_caster_base<MjWrapper<Raw>>::src_and_type(wrapper);
+    auto* type = py::detail::get_type_info(typeid(MjWrapper<Raw>));
     if (type) {
       py::object instance = py::reinterpret_steal<py::object>(
           py::detail::find_registered_python_instance(wrapper, type));