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John Chapman authoredThe pre-mixing jobs rename the output `McEventCollection` to `Bkg_TruthEvent` rather than `TruthEvent`. `HepMcParticleLink` doesn't know that this is a possible collection name that it should check for so all links are broken and the attempts to find the `McEventCollection` in the T->P converter methods always return `nullptr`. This causes the above crash as there is currently no protection against dereferencing a null `McEventCollection` pointer. Adding `Bkg_TruthEvent` to the list of known `McEventCollection` names in `HepMcParticleLink.cxx` should fix ATLASSIM-4539.
John Chapman authoredThe pre-mixing jobs rename the output `McEventCollection` to `Bkg_TruthEvent` rather than `TruthEvent`. `HepMcParticleLink` doesn't know that this is a possible collection name that it should check for so all links are broken and the attempts to find the `McEventCollection` in the T->P converter methods always return `nullptr`. This causes the above crash as there is currently no protection against dereferencing a null `McEventCollection` pointer. Adding `Bkg_TruthEvent` to the list of known `McEventCollection` names in `HepMcParticleLink.cxx` should fix ATLASSIM-4539.
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