GPU: Fix uninitialized memory during TPC tracking that can lead to FPE

davidrohr · davidrohr · commit 18bddc8d6e0e · 2021-05-02T19:18:53.000+02:00
diff --git a/GPU/GPUTracking/Merger/GPUTPCGMMerger.cxx b/GPU/GPUTracking/Merger/GPUTPCGMMerger.cxx
@@ -456,6 +456,7 @@ GPUd() int GPUTPCGMMerger::RefitSliceTrack(GPUTPCGMSliceTrack& sliceTrack, const
   trk.QPt() = inTrack->Param().GetQPt();
   trk.TZOffset() = Param().par.earlyTpcTransform ? inTrack->Param().GetZOffset() : GetConstantMem()->calibObjects.fastTransform->convZOffsetToVertexTime(slice, inTrack->Param().GetZOffset(), Param().par.continuousMaxTimeBin);
   trk.ShiftZ(this, slice, sliceTrack.ClusterZT0(), sliceTrack.ClusterZTN());
+  sliceTrack.SetX2(0.f);
   for (int way = 0; way < 2; way++) {
     if (way) {
       prop.SetFitInProjections(true);
@@ -509,7 +510,6 @@ GPUd() int GPUTPCGMMerger::RefitSliceTrack(GPUTPCGMSliceTrack& sliceTrack, const
       sliceTrack.SetParam2(trk);
     } else {
       sliceTrack.Set(trk, inTrack, alpha, slice);
-      sliceTrack.SetX2(0.f);
     }
   }
   return 0;
