les: fix misuse of WaitGroup (#15365)

0914d4e0 · Evgeny Danilenko · Felix Lange · 9619a610 · 0914d4e0
Commit 0914d4e0 authored Nov 09, 2017 by Evgeny Danilenko Committed by Felix Lange Nov 09, 2017
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fetcher.go les/fetcher.go +3 -3

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--- 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: