From 146adcf7fd7a7275d1e9b4c7e60ed4901c05c570 Mon Sep 17 00:00:00 2001
From: Alex Grintsvayg <git@grin.io>
Date: Fri, 31 Aug 2018 06:38:38 -0400
Subject: [PATCH] fix panic when there were no recent errors

---
 reflector/stats.go | 10 ++++++----
 updater/updater.go |  3 ++-
 2 files changed, 8 insertions(+), 5 deletions(-)

diff --git a/reflector/stats.go b/reflector/stats.go
index 5501bbe..c0f9b57 100644
--- a/reflector/stats.go
+++ b/reflector/stats.go
@@ -102,8 +102,10 @@ func (s *stats) log() {
 		delete(s.errors, name)
 	}
 	s.mu.Unlock()
-	s.logger.Printf(
-		"Stats: %d blobs, %d streams, errors: %s",
-		blobs, streams, errStr[:len(errStr)-2], // trim last comma and space
-	)
+
+	if len(errStr) > 2 {
+		errStr = errStr[:len(errStr)-2] // trim last comma and space
+	}
+
+	s.logger.Printf("Stats: %d blobs, %d streams, errors: %s", blobs, streams, errStr)
 }
diff --git a/updater/updater.go b/updater/updater.go
index dc8cd96..dc875e1 100644
--- a/updater/updater.go
+++ b/updater/updater.go
@@ -15,8 +15,9 @@ import (
 // TODO: this needs to be shut down cleanly
 
 func Run(url, updateCmd string) {
+	t := time.NewTicker(1 * time.Minute)
 	for {
-		<-time.After(1 * time.Minute)
+		<-t.C
 
 		r, err := http.Head(url)
 		if err != nil {