From 59dcf84fd9f579ed927b83d8e97122f7b2e9f46b Mon Sep 17 00:00:00 2001
From: Bastian Schlag <bastian.schlag@cern.ch>
Date: Fri, 6 Mar 2020 17:55:52 +0100
Subject: [PATCH] remove reference in .head call

---
 Core/include/Acts/Vertexing/KalmanVertexTrackUpdater.ipp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Core/include/Acts/Vertexing/KalmanVertexTrackUpdater.ipp b/Core/include/Acts/Vertexing/KalmanVertexTrackUpdater.ipp
index 4d685f9cd..257d147b3 100644
--- a/Core/include/Acts/Vertexing/KalmanVertexTrackUpdater.ipp
+++ b/Core/include/Acts/Vertexing/KalmanVertexTrackUpdater.ipp
@@ -19,7 +19,7 @@ Acts::Result<void> Acts::KalmanVertexTrackUpdater::update(
     return VertexingError::EmptyInput;
   }
 
-  const auto& vtxPos = vtx->fullPosition().template head<3>();
+  const auto vtxPos = vtx->fullPosition().template head<3>();
 
   // Get the linearized track
   const LinearizedTrack& linTrack = track.linearizedState;
-- 
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