From 1c948d6e45b00c19ae2464ec4ff324fd6993c5f5 Mon Sep 17 00:00:00 2001
From: "Eric A. Miller" <jeneric@users.noreply.github.com>
Date: Wed, 21 Mar 2018 23:33:10 -0400
Subject: [PATCH] Prevent warning in _get_topo_data() from undef arg

---
 lib/SNMP/Info.pm | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/SNMP/Info.pm b/lib/SNMP/Info.pm
index 3124e44c..dcb33599 100644
--- a/lib/SNMP/Info.pm
+++ b/lib/SNMP/Info.pm
@@ -2721,7 +2721,7 @@ sub _get_topo_data {
     my $self     = shift;
     my $partial  = shift;
     my $topo_cap = shift;
-    my $method   = shift;
+    my $method   = shift || '';
 
     return unless $method =~ /(ip|if|port|id|platform|cap)/;