From 6dc3f4c669b39724f8b33af6d3735b75a54bbc45 Mon Sep 17 00:00:00 2001
From: Steve Bronder <sbronder@flatironinstitute.org>
Date: Wed, 10 Jan 2024 16:05:04 -0500
Subject: [PATCH] fix requires for rvalue

---
 src/stan/model/indexing/rvalue.hpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/stan/model/indexing/rvalue.hpp b/src/stan/model/indexing/rvalue.hpp
index 330a5bd2e5..c4ebe1ba0e 100644
--- a/src/stan/model/indexing/rvalue.hpp
+++ b/src/stan/model/indexing/rvalue.hpp
@@ -567,6 +567,7 @@ inline auto rvalue(Mat&& x, const char* name, const Idx& row_idx,
 template <typename EigMat, typename Idx, typename MultiIndex,
           require_eigen_dense_dynamic_t<EigMat>* = nullptr,
           require_not_same_t<std::decay_t<Idx>, index_uni>* = nullptr,
+          require_not_same_t<std::decay_t<Idx>, index_multi>* = nullptr,
           require_same_t<MultiIndex, index_multi>* = nullptr>
 inline auto rvalue(EigMat&& x, const char* name, Idx&& row_idx,
                    MultiIndex&& col_idx) {