From 82dfac19bd72fbea4e949bf3cbb9ded1882541bb Mon Sep 17 00:00:00 2001
From: mmusich <marco.musich@cern.ch>
Date: Tue, 29 Aug 2023 09:00:24 +0200
Subject: [PATCH] add information on first hit from HitPattern to LostTracks

---
 PhysicsTools/PatAlgos/plugins/PATLostTracks.cc | 1 +
 1 file changed, 1 insertion(+)

diff --git a/PhysicsTools/PatAlgos/plugins/PATLostTracks.cc b/PhysicsTools/PatAlgos/plugins/PATLostTracks.cc
index fa875f631edd4..5567d4400caa4 100644
--- a/PhysicsTools/PatAlgos/plugins/PATLostTracks.cc
+++ b/PhysicsTools/PatAlgos/plugins/PATLostTracks.cc
@@ -313,6 +313,7 @@ void pat::PATLostTracks::addPackedCandidate(std::vector<pat::PackedCandidate>& c
   cands.back().setLostInnerHits(lostHits);
   if (trk->pt() > minPtToStoreProps_ || trkStatus == TrkStatus::VTX) {
     cands.back().setTrkAlgo(static_cast<uint8_t>(trk->algo()), static_cast<uint8_t>(trk->originalAlgo()));
+    cands.back().setFirstHit(trk->hitPattern().getHitPattern(reco::HitPattern::TRACK_HITS, 0));
     if (useLegacySetup_ || std::abs(id) == 11 || trkStatus == TrkStatus::VTX) {
       cands.back().setTrackProperties(*trk, covariancePackingSchemas_[4], covarianceVersion_);
     } else {