From a14603d4d174863ef7ccb59be560362fc4dff94d Mon Sep 17 00:00:00 2001
From: Felix Schlepper <felix.schlepper@cern.ch>
Date: Sat, 7 Dec 2024 12:39:14 +0100
Subject: [PATCH] STR: Silence predicted chi2 calculation

---
 .../TrackParametrizationWithError.h                  | 12 ++++++++++++
 .../StrangenessTracking/src/StrangenessTracker.cxx   |  2 +-
 2 files changed, 13 insertions(+), 1 deletion(-)

diff --git a/DataFormats/Reconstruction/include/ReconstructionDataFormats/TrackParametrizationWithError.h b/DataFormats/Reconstruction/include/ReconstructionDataFormats/TrackParametrizationWithError.h
index dd155e7f55569..cc783298e14cd 100644
--- a/DataFormats/Reconstruction/include/ReconstructionDataFormats/TrackParametrizationWithError.h
+++ b/DataFormats/Reconstruction/include/ReconstructionDataFormats/TrackParametrizationWithError.h
@@ -100,6 +100,8 @@ class TrackParametrizationWithError : public TrackParametrization<value_T>
 
   template <typename T>
   GPUd() value_t getPredictedChi2(const BaseCluster<T>& p) const;
+  template <typename T>
+  GPUd() value_t getPredictedChi2Quiet(const BaseCluster<T>& p) const;
 
   GPUd() void buildCombinedCovMatrix(const TrackParametrizationWithError& rhs, MatrixDSym5& cov) const;
   GPUd() value_t getPredictedChi2(const TrackParametrizationWithError& rhs, MatrixDSym5& covToSet) const;
@@ -315,6 +317,16 @@ GPUdi() auto TrackParametrizationWithError<value_T>::getPredictedChi2(const Base
   return getPredictedChi2(pyz, cov);
 }
 
+//__________________________________________________________________________
+template <typename value_T>
+template <typename T>
+GPUdi() auto TrackParametrizationWithError<value_T>::getPredictedChi2Quiet(const BaseCluster<T>& p) const -> value_t
+{
+  const dim2_t pyz = {value_T(p.getY()), value_T(p.getZ())};
+  const dim3_t cov = {value_T(p.getSigmaY2()), value_T(p.getSigmaYZ()), value_T(p.getSigmaZ2())};
+  return getPredictedChi2Quiet(pyz, cov);
+}
+
 //______________________________________________
 template <typename value_T>
 GPUdi() auto TrackParametrizationWithError<value_T>::getPredictedChi2(const dim2_t& p, const dim3_t& cov) const -> value_t
diff --git a/Detectors/Vertexing/StrangenessTracking/src/StrangenessTracker.cxx b/Detectors/Vertexing/StrangenessTracking/src/StrangenessTracker.cxx
index d5d4951b1c707..720ef4c9d5d87 100644
--- a/Detectors/Vertexing/StrangenessTracking/src/StrangenessTracker.cxx
+++ b/Detectors/Vertexing/StrangenessTracking/src/StrangenessTracker.cxx
@@ -507,7 +507,7 @@ bool StrangenessTracker::updateTrack(const ITSCluster& clus, o2::track::TrackPar
       return false;
     }
   }
-  auto chi2 = std::abs(track.getPredictedChi2(clus)); // abs to be understood
+  auto chi2 = std::abs(track.getPredictedChi2Quiet(clus)); // abs to be understood
   LOG(debug) << "Chi2: " << chi2;
   if (chi2 > mStrParams->mMaxChi2 || chi2 < 0) {
     return false;