Possibly unreachable code/incorrect handling of accurate backups
Unless I've misunderstood something, the code in check_checksum_diff to handle FO_XXHASH64, FO_XXH3_64 and FO_XXH3_128 can never be reached (https://gitlab.bacula.org/bacula-community-edition/bacula-community/-/blob/Branch-15.0/bacula/src/filed/accurate.c?ref_type=heads#L409) because the test above it at line 380 doesn't include those bits.