From 7d12adc7b92193d19903b32e59077ddd2d38c480 Mon Sep 17 00:00:00 2001
From: Marius van der Wijden <m.vanderwijden@live.de>
Date: Tue, 3 Dec 2019 11:39:21 +0100
Subject: [PATCH] p2p/enode prevent data race in sliceIter

Node() had a data race with Next()
---
 p2p/enode/iter.go | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/p2p/enode/iter.go b/p2p/enode/iter.go
index 112b76d06a..664964f534 100644
--- a/p2p/enode/iter.go
+++ b/p2p/enode/iter.go
@@ -88,6 +88,8 @@ func (it *sliceIter) Next() bool {
 }
 
 func (it *sliceIter) Node() *Node {
+	it.mu.Lock()
+	defer it.mu.Unlock()
 	if len(it.nodes) == 0 {
 		return nil
 	}