ks_heapmake(heap, n, heap);
while (heap->pos != HEAP_EMPTY) {
bam1_t *b = heap->b;
- if ((flag & MERGE_RG) && bam_aux_get(b, "RG") == 0)
+ if (flag & MERGE_RG) {
+ uint8_t *rg = bam_aux_get(b, "RG");
+ if (rg) bam_aux_del(b, rg);
bam_aux_append(b, "RG", 'Z', RG_len[heap->i] + 1, (uint8_t*)RG[heap->i]);
+ }
bam_write1_core(fpout, &b->core, b->data_len, b->data);
if ((j = bam_iter_read(fp[heap->i], iter[heap->i], b)) >= 0) {
heap->pos = ((uint64_t)b->core.tid<<32) | (uint32_t)b->core.pos<<1 | bam1_strand(b);