From dc654e0770e7f990a422508d3ed8df73104881d4 Mon Sep 17 00:00:00 2001
From: Brian Ward <bward@flatironinstitute.org>
Date: Thu, 12 Dec 2024 14:36:35 -0500
Subject: [PATCH] Clean up var memory in laplace_sample

---
 src/stan/services/optimize/laplace_sample.hpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/stan/services/optimize/laplace_sample.hpp b/src/stan/services/optimize/laplace_sample.hpp
index 600fc52cd5..423c8c8ea4 100644
--- a/src/stan/services/optimize/laplace_sample.hpp
+++ b/src/stan/services/optimize/laplace_sample.hpp
@@ -121,6 +121,8 @@ void laplace_sample(const Model& model, const Eigen::VectorXd& theta_hat,
 
     double log_p;
     if (calculate_lp) {
+      // clean up created vars after scope exit
+      stan::math::nested_rev_autodiff stack;
       log_p = log_density_fun(unc_draw).val();
     } else {
       log_p = std::numeric_limits<double>::quiet_NaN();