From 46e59d4d19df888f77b8b2adae302e0a998fa790 Mon Sep 17 00:00:00 2001
From: georgezgeorgez <george@biginches.club>
Date: Fri, 5 Aug 2022 01:22:13 +0000
Subject: [PATCH] Allow p2p discovery refresh to handle empty peers

---
 p2p/discover/table.go | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/p2p/discover/table.go b/p2p/discover/table.go
index ae3971a..3ccad21 100644
--- a/p2p/discover/table.go
+++ b/p2p/discover/table.go
@@ -308,9 +308,11 @@ func (tab *Table) refresh(forceSeed bool) {
 
 		nodes := append(tab.nursery, seeds...)
 
-		for i := uint32(len(nodes)) - 1; i > 0; i-- {
-			j := randUint(i)
-			nodes[i], nodes[j] = nodes[j], nodes[i]
+		if len(nodes) > 0 {
+			for i := uint32(len(nodes)) - 1; i > 0; i-- {
+				j := randUint(i)
+				nodes[i], nodes[j] = nodes[j], nodes[i]
+			}
 		}
 
 		// Bond with all the seed nodes (will pingpong only if failed recently)