Bug: check len(items) > 0 for getLatestSecond function in metric reader(#121)

zsy619 · web-flow · commit 7e2e72b5ac6f · 2020-04-29T19:36:21.000+08:00
diff --git a/core/log/metric/reader.go b/core/log/metric/reader.go
@@ -175,7 +175,7 @@ func readLine(bufReader *bufio.Reader) (string, error) {
 }
 
 func getLatestSecond(items []*base.MetricItem) uint64 {
-	if items == nil {
+	if items == nil || len(items) == 0 {
 		return 0
 	}
 	return items[len(items)-1].Timestamp / 1000

Original file line number	Diff line number	Diff line change
`@@ -175,7 +175,7 @@ func readLine(bufReader *bufio.Reader) (string, error) {`
`175`	`175`	`}`
`176`	`176`
`177`	`177`	`func getLatestSecond(items []*base.MetricItem) uint64 {`
`178`		`- if items == nil {`
	`178`	`+ if items == nil \|\| len(items) == 0 {`
`179`	`179`	`return 0`
`180`	`180`	`}`
`181`	`181`	`return items[len(items)-1].Timestamp / 1000`