From 28946b7ecf5de3b5817f8ec85981bd8d28dfe41d Mon Sep 17 00:00:00 2001
From: Vsevolod Stakhov <vsevolod@highsecure.ru>
Date: Thu, 10 Sep 2015 16:01:51 +0100
Subject: [PATCH] Fix index calculation.

---
 src/libserver/html.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/libserver/html.c b/src/libserver/html.c
index 96380a3ef..e68c73c8c 100644
--- a/src/libserver/html.c
+++ b/src/libserver/html.c
@@ -1892,7 +1892,7 @@ rspamd_html_process_part_full (rspamd_mempool_t *pool, struct html_content *hc,
 						cur_tag->id == Tag_HR || cur_tag->id == Tag_TR ||
 						cur_tag->id == Tag_DIV) && balanced) {
 					/* Insert newline */
-					if (dest->data[dest->len - 1] != '\n') {
+					if (dest->len > 0 && dest->data[dest->len - 1] != '\n') {
 						g_byte_array_append (dest, "\r\n", 2);
 					}
 					save_space = FALSE;
-- 
2.39.5