From b281839040e73a056b740bc849597ff847f615c9 Mon Sep 17 00:00:00 2001
From: lucaperju <lucaperju@gmail.com>
Date: Fri, 16 Aug 2024 10:50:10 +0200
Subject: [PATCH] fix b_data bug

---
 include/random_walks/uniform_accelerated_billiard_walk.hpp | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/include/random_walks/uniform_accelerated_billiard_walk.hpp b/include/random_walks/uniform_accelerated_billiard_walk.hpp
index 30f85e584..d9bec3f6a 100644
--- a/include/random_walks/uniform_accelerated_billiard_walk.hpp
+++ b/include/random_walks/uniform_accelerated_billiard_walk.hpp
@@ -235,9 +235,11 @@ struct AcceleratedBilliardWalk
             NT T;
             const NT dl = 0.995;
             int it;
+            typename Point::Coeff b;
+            NT* b_data;
             if constexpr (std::is_same<MT, Eigen::SparseMatrix<NT, Eigen::RowMajor>>::value) {
-                typename Point::Coeff b = P.get_vec();
-                NT* b_data = b.data();
+                b = P.get_vec();
+                b_data = b.data();
             }
 
             for (auto j=0u; j<walk_length; ++j)