fillBarcodesAttribute call in GenModule
Barcode (and vertex) maps are empty in HepMC3. This MR calls HepMC::fillBarcodesAttribute
within GenModule, such that these are filled for all generators inheriting from GenModule. Since the xAODTruthCnvAlg
has recently migrated to loop over the barcode map to fill TruthParticles
(link), these empty maps resulted in empty xAOD truth containers.
Edited by Matthew Gignac