Merge pull request #29065 from srimanob/102_backportBugFixInfLoopMuon

Bug fix on infinite loop in MuonSinClassifier (Backport)
cms-sw · Mar 2, 2020 · 5a9cc2d · 5a9cc2d
2 parents 8718d36 + 0b539aa
commit 5a9cc2d
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/SimMuon/MCTruth/plugins/MuonSimClassifier.cc b/SimMuon/MCTruth/plugins/MuonSimClassifier.cc
@@ -301,7 +301,11 @@ MuonSimClassifier::produce(edm::Event& iEvent, const edm::EventSetup& iSetup)
 		  jm++;
 		  if (mMom->numberOfMothers() > 0) {
 		    mMom = mMom->motherRef();
+		  } else {
+		    LogTrace("MuonSimClassifier") << "\t No Mother is found ";
+		    break;
 		  }
+
 		  LogTrace("MuonSimClassifier") 
 		    << "\t\t backtracking mother "<<jm<<", pdgId = "<<mMom->pdgId()<<", status= " <<mMom->status();
 		}