From 3126979ad5d214d7eb31c4242c52bd2edafff50a Mon Sep 17 00:00:00 2001
From: Frank Dellaert <dellaert@cc.gatech.edu>
Date: Wed, 3 Apr 2019 22:45:49 -0400
Subject: [PATCH] Fixed memory issue (passing temporary to optional reference)

---
 gtsam/linear/GaussianBayesNet.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/gtsam/linear/GaussianBayesNet.cpp b/gtsam/linear/GaussianBayesNet.cpp
index 22f1918e4..87e0ded15 100644
--- a/gtsam/linear/GaussianBayesNet.cpp
+++ b/gtsam/linear/GaussianBayesNet.cpp
@@ -163,7 +163,8 @@ namespace gtsam {
       return factorGraph.jacobian(ordering);
     } else {
       // recursively call with default ordering
-      return matrix(this->ordering());
+      const auto defaultOrdering = this->ordering();
+      return matrix(defaultOrdering);
     }
   }