From 825ab10f0293cd778785b72f4e405823c6fe74e1 Mon Sep 17 00:00:00 2001
From: Sebastian Jaenicke <sjaenick@CeBiTec.Uni-Bielefeld.DE>
Date: Fri, 12 May 2023 15:14:24 +0200
Subject: [PATCH] improve error handling

---
 bamstats.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/bamstats.c b/bamstats.c
index e21a382..e0bd221 100644
--- a/bamstats.c
+++ b/bamstats.c
@@ -53,7 +53,8 @@ int bam_reader(char* bamfile, char* outfile) {
             char* ref = hdr->target_name[tid];
             k = kh_get(str, h, ref);
             if (k == kh_end(h)) { // miss
-                fprintf(stderr, "error\n");
+                fprintf(stderr, "error for reference sequence %s\n", ref);
+                return -1;
             } else {
                 cnt = kh_val(h, k);
                 kh_value(h, k) = ++cnt;