From eb2a4d4d4cd47f4e373b61222402dcd0ec974224 Mon Sep 17 00:00:00 2001
From: detailyang <detailyang@gmail.com>
Date: Wed, 3 Jul 2019 13:24:16 +0800
Subject: [PATCH] bugfix: avoid nil reference when ignore is nil

Signed-off-by: detailyang <detailyang@gmail.com>
---
 collector/netdev_darwin.go | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/collector/netdev_darwin.go b/collector/netdev_darwin.go
index c07e7fa182..c45e868588 100644
--- a/collector/netdev_darwin.go
+++ b/collector/netdev_darwin.go
@@ -42,7 +42,7 @@ func getNetDevStats(ignore *regexp.Regexp, accept *regexp.Regexp) (map[string]ma
 			continue
 		}
 
-		if ignore.MatchString(iface.Name) {
+		if ignore != nil && ignore.MatchString(iface.Name) {
 			log.Debugf("Ignoring device: %s", iface.Name)
 			continue
 		}