Fix: fix v0 daughter dereferencing in derived producer

Author: ariedel-cern

PWGCF/Femto/Core/v0Builder.h

@@ -558,7 +558,7 @@ class V0BuilderDerivedToDerived
   }
 
   template <typename T1, typename T2, typename T3, typename T4>
-  bool collisionHasTooFewLambdas(T1& col, T2& /*lambdaTable*/, T3& partitionLambda, T4& cache)
+  bool collisionHasTooFewLambdas(T1 const& col, T2 const& /*lambdaTable*/, T3& partitionLambda, T4& cache)
   {
     auto lambdaSlice = partitionLambda->sliceByCached(o2::aod::femtobase::stored::fColId, col.globalIndex(), cache);
     if (lambdaSlice.size() >= mLimitLambda) {
@@ -568,7 +568,7 @@ class V0BuilderDerivedToDerived
   }
 
   template <typename T1, typename T2, typename T3, typename T4>
-  bool collisionHasTooFewK0shorts(T1& col, T2& /*k0shortTable*/, T3& partitionK0short, T4& cache)
+  bool collisionHasTooFewK0shorts(T1 const& col, T2 const& /*k0shortTable*/, T3& partitionK0short, T4& cache)
   {
     auto k0shortSlice = partitionK0short->sliceByCached(o2::aod::femtobase::stored::fColId, col.globalIndex(), cache);
     if (k0shortSlice.size() >= mLimitK0short) {
@@ -578,14 +578,16 @@ class V0BuilderDerivedToDerived
   }
 
   template <typename T1, typename T2, typename T3, typename T4, typename T5, typename T6, typename T7, typename T8, typename T9>
-  void processLambdas(T1& col, T2& /*lambdaTable*/, T3& /*oldTrackTable*/, T4& partitionLambda, T5& trackBuilder, T6& cache, T7& newLambdaTable, T8& newTrackTable, T9& newCollisionTable)
+  void processLambdas(T1 const& col, T2 const& /*lambdaTable*/, T3 const& oldTrackTable, T4& partitionLambda, T5& trackBuilder, T6& cache, T7& newLambdaTable, T8& newTrackTable, T9& newCollisionTable)
   {
     auto lambdaSlice = partitionLambda->sliceByCached(o2::aod::femtobase::stored::fColId, col.globalIndex(), cache);
 
     for (auto const& lambda : lambdaSlice) {
 
-      auto posDaughter = lambda.template posDau_as<T3>();
-      auto negDaughter = lambda.template negDau_as<T3>();
+      // auto posDaughter = lambda.template posDau_as<T3>();
+      // auto negDaughter = lambda.template negDau_as<T3>();
+      auto posDaughter = oldTrackTable.rawIteratorAt(lambda.posDauId() - oldTrackTable.offset());
+      auto negDaughter = oldTrackTable.rawIteratorAt(lambda.negDauId() - oldTrackTable.offset());
 
       int posDaughterIndex = trackBuilder.getDaughterIndex(posDaughter, newTrackTable, newCollisionTable);
       int negDaughterIndex = trackBuilder.getDaughterIndex(negDaughter, newTrackTable, newCollisionTable);
@@ -602,14 +604,16 @@ class V0BuilderDerivedToDerived
   }
 
   template <typename T1, typename T2, typename T3, typename T4, typename T5, typename T6, typename T7, typename T8, typename T9>
-  void processK0shorts(T1& col, T2& /*k0shortTable*/, T3& /*oldTrackTable*/, T4& partitionK0short, T5& trackBuilder, T6& cache, T7& newK0shortTable, T8& newTrackTable, T9& newCollisionTable)
+  void processK0shorts(T1 const& col, T2 const& /*k0shortTable*/, T3 const& oldTrackTable, T4& partitionK0short, T5& trackBuilder, T6& cache, T7& newK0shortTable, T8& newTrackTable, T9& newCollisionTable)
   {
     auto k0shortSlice = partitionK0short->sliceByCached(o2::aod::femtobase::stored::fColId, col.globalIndex(), cache);
 
     for (auto const& k0short : k0shortSlice) {
 
-      auto posDaughter = k0short.template posDau_as<T3>();
-      auto negDaughter = k0short.template negDau_as<T3>();
+      // auto posDaughter = k0short.template posDau_as<T3>();
+      // auto negDaughter = k0short.template negDau_as<T3>();
+      auto posDaughter = oldTrackTable.rawIteratorAt(k0short.posDauId() - oldTrackTable.offset());
+      auto negDaughter = oldTrackTable.rawIteratorAt(k0short.negDauId() - oldTrackTable.offset());
 
       int posDaughterIndex = trackBuilder.getDaughterIndex(posDaughter, newTrackTable, newCollisionTable);
       int negDaughterIndex = trackBuilder.getDaughterIndex(negDaughter, newTrackTable, newCollisionTable);