eth/downloader: fix a potential issue against future refactors

2017-05-02 16:14:35 +03:00 · 2017-05-02 16:14:35 +03:00 · 96c2ab22e0
commit 96c2ab22e0
parent 5884606ec3
1 changed files with 4 additions and 0 deletions
--- a/eth/downloader/downloader.go
+++ b/eth/downloader/downloader.go
@ -1491,6 +1491,10 @@ func (d *Downloader) qosTuner() {
 func (d *Downloader) qosReduceConfidence() {
 	// If we have a single peer, confidence is always 1
 	peers := uint64(d.peers.Len())
+	if peers == 0 {
+		// Ensure peer connectivity races don't catch us off guard
+		return
+	}
 	if peers == 1 {
 		atomic.StoreUint64(&d.rttConfidence, 1000000)
 		return