TBranchElement: no drilling through new members. #9927
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(thanks valgrind for pointing this out)
This resolved the problem seen at: cms-sw/cmssw#36908 (comment) and fix root-project#9899. The problem is the rules are applied to a data member nested inside an object nested inside an STL collection that is a new data member of the class reco::HaloClusterCandidateHCAL, since it is a new member compared to the layout on file, none of the objects; from the new member down to the object on which the rules need to be run) are actually streamed and the code gathering the information to run the rule got a bit lost ; it is likely (I am checking as we speak) that in previous release the rule was not even attempted to be run ... which might actually be the desired behavior in this specific case. The solution is to have GatherArtificialElements stop drilling through data members which are not stored in the existing TTree.
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See #9913
This resolved the problem seen at: cms-sw/cmssw#36908 (comment)
and fix #9899.
The problem is the rules are applied to a data member nested inside an object nested inside
an STL collection that is a new data member of the class reco::HaloClusterCandidateHCAL,
since it is a new member compared to the layout on file, none of the objects; from the new
member down to the object on which the rules need to be run) are actually streamed and the
code gathering the information to run the rule got a bit lost ; it is likely (I am checking
as we speak) that in previous release the rule was not even attempted to be run ... which
might actually be the desired behavior in this specific case.
The solution is to have GatherArtificialElements stop drilling through data members which
are not stored in the existing TTree