for (unsigned elem = prefix_min; elem < prefix_max; ++elem) {
assert(tbl->lookup_table_codes[elem] == DEHUF_SLOW_PATH);
assert(tbl->lookup_table_length[elem] == DEHUF_SLOW_PATH);
for (unsigned elem = prefix_min; elem < prefix_max; ++elem) {
assert(tbl->lookup_table_codes[elem] == DEHUF_SLOW_PATH);
assert(tbl->lookup_table_length[elem] == DEHUF_SLOW_PATH);