From 0914d4e0d2b29249bdec9d2342256c39e1787bf3 Mon Sep 17 00:00:00 2001
From: Evgeny Danilenko <6655321@bk.ru>
Date: Thu, 9 Nov 2017 12:34:35 +0300
Subject: [PATCH] les: fix misuse of WaitGroup (#15365)

---
 les/fetcher.go | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/les/fetcher.go b/les/fetcher.go
index 4fc142f0f..3fc4df30b 100644
--- a/les/fetcher.go
+++ b/les/fetcher.go
@@ -117,16 +117,16 @@ func newLightFetcher(pm *ProtocolManager) *lightFetcher {
 		maxConfirmedTd: big.NewInt(0),
 	}
 	pm.peers.notify(f)
+
+	f.pm.wg.Add(1)
 	go f.syncLoop()
 	return f
 }
 
 // syncLoop is the main event loop of the light fetcher
 func (f *lightFetcher) syncLoop() {
-	f.pm.wg.Add(1)
-	defer f.pm.wg.Done()
-
 	requesting := false
+	defer f.pm.wg.Done()
 	for {
 		select {
 		case <-f.pm.quitSync: