format: fix crash when emitting empty messages in text format

2020-04-23 21:44:15 +02:00 · 2020-04-23 21:44:15 +02:00 · b8b0a5b5c3
parent 36f9e53dfd
commit b8b0a5b5c3
1 changed files with 1 additions and 1 deletions
--- a/format.go
+++ b/format.go
@ -179,7 +179,7 @@ func (tf *textFormatter) format(m proto.Message) (string, error) {

 	// no trailing newline needed
 	str := buf.String()
-	if str[len(str)-1] == '\n' {
+	if len(str) > 0 && str[len(str)-1] == '\n' {
 		str = str[:len(str)-1]
 	}