From c4df281e9d88ffd40f76d42ea824ab65afd26f9f Mon Sep 17 00:00:00 2001
From: "Ralf W. Grosse-Kunstleve" <rwgk@google.com>
Date: Mon, 10 Jun 2024 19:23:08 -0700
Subject: [PATCH] Also remove return_value_policy::_return_as_bytes in
 pybind11/eigen/

---
 include/pybind11/eigen/matrix.h | 3 ---
 include/pybind11/eigen/tensor.h | 4 ----
 2 files changed, 7 deletions(-)

diff --git a/include/pybind11/eigen/matrix.h b/include/pybind11/eigen/matrix.h
index eafbca1490..8d4342f81b 100644
--- a/include/pybind11/eigen/matrix.h
+++ b/include/pybind11/eigen/matrix.h
@@ -351,9 +351,6 @@ struct type_caster<Type, enable_if_t<is_eigen_dense_plain<Type>::value>> {
                 return eigen_ref_array<props>(*src);
             case return_value_policy::reference_internal:
                 return eigen_ref_array<props>(*src, parent);
-            case return_value_policy::_return_as_bytes:
-                pybind11_fail("return_value_policy::_return_as_bytes does not apply.");
-                break;
             default:
                 throw cast_error("unhandled return_value_policy: should not happen!");
         };
diff --git a/include/pybind11/eigen/tensor.h b/include/pybind11/eigen/tensor.h
index 803d41becf..d4ed6c0ca8 100644
--- a/include/pybind11/eigen/tensor.h
+++ b/include/pybind11/eigen/tensor.h
@@ -313,10 +313,6 @@ struct type_caster<Type, typename eigen_tensor_helper<Type>::ValidType> {
                 writeable = !std::is_const<C>::value;
                 break;
 
-            case return_value_policy::_return_as_bytes:
-                pybind11_fail("return_value_policy::_return_as_bytes does not apply.");
-                break;
-
             default:
                 pybind11_fail("pybind11 bug in eigen.h, please file a bug report");
         }