From 39f836eac81b5e05d61bb6ebb46a3096a3db3309 Mon Sep 17 00:00:00 2001
From: Heng Li <lh3@me.com>
Date: Tue, 24 Apr 2018 12:32:37 -0400
Subject: [PATCH] r767: don't crash when there is no "cg" (#153)

---
 misc/paftools.js | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/misc/paftools.js b/misc/paftools.js
index 9fdebcf..617301e 100755
--- a/misc/paftools.js
+++ b/misc/paftools.js
@@ -1,6 +1,6 @@
 #!/usr/bin/env k8
 
-var paftools_version = 'r755';
+var paftools_version = 'r767';
 
 /*****************************
  ***** Library functions *****
@@ -676,8 +676,10 @@ function paf_stat(args)
 			last_qlen = ori_qlen;
 		}
 	}
-	l_tot += last_qlen;
-	l_cov += cov_len(regs);
+	if (regs.length) {
+		l_tot += last_qlen;
+		l_cov += cov_len(regs);
+	}
 
 	file.close();
 	buf.destroy();