Sometimes one can see something like this in gbak output:

gbak: 0.976 0.000 0 0 writing domain RDB$235968
gbak: 0.976 0.000 18446744073709550696 18446744073709551615 writing domain RDB$235969
gbak: 0.976 0.000 920 1 writing domain RDB$235970

i.e. statistics contains definitely wrong data.

Issue was reported privately by Vlad (@hvlad).