Merge pull request #1788 from grafana/as-percent-panic-on-empty-input

asPercent: don't panic on empty input
grafana · Apr 17, 2020 · 4c2b3a8 · 4c2b3a8
2 parents 3265087 + 65452ba
commit 4c2b3a8
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/expr/func_aspercent.go b/expr/func_aspercent.go
@@ -180,6 +180,9 @@ func (s *FuncAsPercent) execWithNodes(in, totals []models.Series, dataMap DataMa
 // * multiple series -> must match len(series), sort and match up in pairs to input series
 // * nil             -> generate total by summing the inputs
 func (s *FuncAsPercent) execWithoutNodes(in, totals []models.Series, dataMap DataMap) ([]models.Series, error) {
+	if len(in) == 0 {
+		return in, nil
+	}
 	var outSeries []models.Series
 	var totalsSerie models.Series
 	if math.IsNaN(s.totalFloat) && totals == nil {