From cf7e152824cd249bae3d74b879b049be0d0f9407 Mon Sep 17 00:00:00 2001
From: Tobias Oetiker <tobi@oetiker.ch>
Date: Tue, 28 Jul 2015 17:38:59 +0200
Subject: [PATCH] start reading at gdes_c - 1 or we are out of bounds

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

diff --git a/src/rrd_graph_helper.c b/src/rrd_graph_helper.c
index 71c5a3a2..574bd449 100644
--- a/src/rrd_graph_helper.c
+++ b/src/rrd_graph_helper.c
@@ -1127,7 +1127,7 @@ int parse_stack(enum gf_en gf,parsedargs_t*pa,image_desc_t *const im){
   gdp->stack=1;
   /* and try to get the one index before ourselves */
   long i;
-  for (i=im->gdes_c;(gdp->gf==gf)&&(i>=0);i--) {
+  for (i=im->gdes_c-1;(gdp->gf==gf)&&(i>=0);i--) {
     dprintfparsed("trying to process entry %li with type %u\n",i,im->gdes[i].gf);
     switch (im->gdes[i].gf) {
     case GF_LINE:
-- 
2.47.2