printbuf_indent_add(out, 2);
prt_printf(out, "gen %u oldest_gen %u data_type %s",
- a->gen, a->oldest_gen, bch2_data_types[a->data_type]);
+ a->gen, a->oldest_gen,
+ a->data_type < BCH_DATA_NR
+ ? bch2_data_types[a->data_type]
+ : "(invalid data type)");
prt_newline(out);
prt_printf(out, "journal_seq %llu", a->journal_seq);
prt_newline(out);