PWGLF: add exception catch, fix missing initialization in for loop (#6285)

* PWGLF: add exception catch

* Update strangederivedbuilder.cxx

* Fix missing-def-initialization-inside-loop bug

Author: ddobrigk

PWGLF/TableProducer/Strangeness/lambdakzeromcbuilder.cxx

@@ -104,6 +104,12 @@ struct lambdakzeromcbuilder {
 
     for (auto& v0 : v0table) {
       thisInfo.packedMcParticleIndices = 0; // not de-referenced properly yet
+      thisInfo.label = -1;
+      thisInfo.motherLabel = -1;
+      thisInfo.pdgCode = 0;
+      thisInfo.pdgCodeMother = 0;
+      thisInfo.pdgCodePositive = 0;
+      thisInfo.pdgCodeNegative = 0;
       auto lNegTrack = v0.negTrack_as<aod::McTrackLabels>();
       auto lPosTrack = v0.posTrack_as<aod::McTrackLabels>();
 

PWGLF/TableProducer/Strangeness/strangederivedbuilder.cxx

@@ -421,15 +421,19 @@ struct strangederivedbuilder {
         uint32_t indMCColl = -1;
         if (v0.has_mcParticle()) {
           auto mcParticle = v0.mcParticle();
-          indMCColl = mcParticle.mcCollisionId();
+          if (mcParticle.has_mcCollision()) {
+            indMCColl = mcParticle.mcCollisionId();
+          }
         }
         v0mccollref(indMCColl);
       }
       for (const auto& casc : CascTable_thisColl) {
         uint32_t indMCColl = -1;
         if (casc.has_mcParticle()) {
           auto mcParticle = casc.mcParticle();
-          indMCColl = mcParticle.mcCollisionId();
+          if (mcParticle.has_mcCollision()) {
+            indMCColl = mcParticle.mcCollisionId();
+          }
         }
         cascmccollref(indMCColl);
       }