From cf0b54e63c1d1dd7342cb5cc1049c267ad7a6b10 Mon Sep 17 00:00:00 2001
From: graphenn <graphenn@gmail.com>
Date: Sun, 10 Dec 2023 03:16:32 +0800
Subject: [PATCH] fix core dump after seg vcf write

---
 cyvcf2/cyvcf2.pyx | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/cyvcf2/cyvcf2.pyx b/cyvcf2/cyvcf2.pyx
index 7ff79f0..6fc695c 100644
--- a/cyvcf2/cyvcf2.pyx
+++ b/cyvcf2/cyvcf2.pyx
@@ -2404,7 +2404,7 @@ cdef class Writer(VCF):
         if not self.header_written:
             self.write_header()
         if var.b.errcode == BCF_ERR_CTG_UNDEF:
-            h = bcf_hdr_id2hrec(self.ohdr, BCF_DT_CTG, 0, var.b.rid)
+            h = bcf_hdr_id2hrec(bcf_hdr_dup(self.ohdr), BCF_DT_CTG, 0, var.b.rid)
             if h == NULL:
                 raise Exception("contig %d unknown and not found in header" % var.b.rid)
             if bcf_hdr_add_hrec(self.hdr, h) < 0: