From 102f5f479c6cb2c13a19fa08126fce1201a3bfd2 Mon Sep 17 00:00:00 2001
From: Jeff Young <jeff@rokeby.ie>
Date: Wed, 15 Jan 2020 19:40:20 +0000
Subject: [PATCH] Handle uninitialized nets gracefully.

---
 pcbnew/class_board.cpp | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/pcbnew/class_board.cpp b/pcbnew/class_board.cpp
index b11937b451..b75a2af53a 100644
--- a/pcbnew/class_board.cpp
+++ b/pcbnew/class_board.cpp
@@ -1150,7 +1150,12 @@ int BOARD::SortedNetnamesList( wxArrayString& aNames, bool aSortbyPadsCount )
         padCountListByNet.assign( max_netcode + 1, 0 );
 
         for( D_PAD* pad : pads )
-            padCountListByNet[pad->GetNetCode()]++;
+        {
+            int netCode = pad->GetNetCode();
+
+            if( netCode >= 0 )
+                padCountListByNet[ netCode ]++;
+        }
 
         sort( netBuffer.begin(), netBuffer.end(), sortNetsByNodes );
     }