From cc959f758c25043f071a44dcfc273b803f01239e Mon Sep 17 00:00:00 2001
From: Volker Friese <v.friese@gsi.de>
Date: Fri, 18 Sep 2020 15:09:59 +0200
Subject: [PATCH] Make arguments to Lambda function for the sorting of clusters
 constant. Refs #1808 @30min.

---
 reco/detectors/sts/CbmStsRecoModule.cxx | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/reco/detectors/sts/CbmStsRecoModule.cxx b/reco/detectors/sts/CbmStsRecoModule.cxx
index d62e16af38..aac2534c98 100644
--- a/reco/detectors/sts/CbmStsRecoModule.cxx
+++ b/reco/detectors/sts/CbmStsRecoModule.cxx
@@ -115,12 +115,12 @@ void CbmStsRecoModule::Reconstruct() {
   // --- Sort clusters by time
   std::sort(fClustersF.begin(),
             fClustersF.end(),
-            [](CbmStsCluster& cluster1, CbmStsCluster& cluster2) {
+            [](const CbmStsCluster& cluster1, const CbmStsCluster& cluster2) {
               return (cluster1.GetTime() < cluster2.GetTime());
             });
   std::sort(fClustersB.begin(),
             fClustersB.end(),
-            [](CbmStsCluster& cluster1, CbmStsCluster& cluster2) {
+            [](const CbmStsCluster& cluster1, const CbmStsCluster& cluster2) {
               return (cluster1.GetTime() < cluster2.GetTime());
             });
 
-- 
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