extra fields ok

main.go

@@ -8,6 +8,7 @@ import (
 	"log"
 	"os"
 	"strconv"
+	"strings"
 )
 
 func main() {
@@ -23,9 +24,12 @@ func main() {
 		if err == io.EOF {
 			break
 		}
-		if err != nil {
+		if err != nil && !strings.Contains(err.Error(), "wrong number of fields") {
 			panic(err)
 		}
+		for len(line) < len(fields) {
+			line = append(line, "null")
+		}
 		if len(line) != len(fields) {
 			log.Println("[WARN]", "line", n, "has", len(line), "fields but only", len(fields), "are known")
 		}