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-rw-r--r--eth/downloader/downloader.go4
1 files changed, 4 insertions, 0 deletions
diff --git a/eth/downloader/downloader.go b/eth/downloader/downloader.go
index d26995782..839969f03 100644
--- 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