From b8b0a5b5c35ba7a0b7d0b8ff46fbcafbbfcb75be Mon Sep 17 00:00:00 2001
From: Serge Bazanski <q3k@q3k.org>
Date: Thu, 23 Apr 2020 21:44:15 +0200
Subject: [PATCH] format: fix crash when emitting empty messages in text format

---
 format.go | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/format.go b/format.go
index db93eb4..a3dc444 100644
--- 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]
 	}