PARA_DEBUG_LOG("adding chunk %u\n", pard->current_chunk);
btr_add_output_dont_free(start, len, btrn);
if (pard->current_chunk >= pard->last_chunk) {
PARA_DEBUG_LOG("adding chunk %u\n", pard->current_chunk);
btr_add_output_dont_free(start, len, btrn);
if (pard->current_chunk >= pard->last_chunk) {