From: Tom Clegg <tom@tomclegg.ca>
Date: Thu, 19 Nov 2020 05:38:25 +0000 (-0500)
Subject: Fix divide by zero.
X-Git-Url: https://git.arvados.org/lightning.git/commitdiff_plain/870319feefd956f48d33d0d4cd146d1da16d9c55?hp=4a3899f5808423646643b6a2c1a68dd4837d1372

Fix divide by zero.

Arvados-DCO-1.1-Signed-off-by: Tom Clegg <tom@tomclegg.ca>
---

diff --git a/export.go b/export.go
index b6b160ddb7..958da95a17 100644
--- a/export.go
+++ b/export.go
@@ -405,8 +405,13 @@ func (cmd *exporter) exportSeq(outw, bedw io.Writer, taglen int, seqname string,
 				thickstart = 0
 			}
 			thickend := refpos
+
 			// coverage score, 0 to 1000
-			score := 1000 * tagcoverage / len(cgs) / 2
+			score := 1000
+			if len(cgs) > 0 {
+				score = 1000 * tagcoverage / len(cgs) / 2
+			}
+
 			fmt.Fprintf(bedw, "%s %d %d %d %d . %d %d\n",
 				seqname, tilestart, tileend,
 				libref.Tag,