I attach a reduced version of my file, it has a tree called Tree1 with two leafs. Energy.det_e and Time.det_times, both are arrays, int and unsigned long long respectively. For the time leaf I face the problem described above.
@eguiraud I also get this problem on my Linux, even when I try: TTreeReaderArray<ULong64_t>
Note: the problem appears first when one tries: aReader.Next();
BTW. The old ROOT-8952 issue is unrelated to your problem.
Hi @Bayes27 ,
it looks like a bug with the specific combination of ULong64_t, TTreeReaderArray and branch with leafname different from the branch name. Things should work e.g. if instead of Time.det_times you make it so that the leaf name and branch name are the same:
P.S.
the jira ticket you mention is indeed unrelated, as it has to do with variable sized arrays and leaf counters (i.e. leafs that store the size of the array) of type unsigned long long. Here your array has fixed size and there is no counter.