From ee809fcf675aa0d80ed8c488c6e849776d67b214 Mon Sep 17 00:00:00 2001
From: =?utf8?q?Wolfgang=20St=C3=B6ggl?= <c72578@yahoo.de>
Date: Tue, 4 Jun 2019 10:14:11 +0200
Subject: [PATCH] Fix --use-nan-for-all-missing-data

- Fixes: https://github.com/oetiker/rrdtool-1.x/issues/918
---
 src/rrd_graph.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/rrd_graph.c b/src/rrd_graph.c
index 5a78f573..f5d2cdec 100644
--- a/src/rrd_graph.c
+++ b/src/rrd_graph.c
@@ -1072,7 +1072,7 @@ int data_fetch(
                 im->gdes[i].ds = ii;
             }
         }
-        if (im->gdes[i].ds == -1) {
+        if ((im->gdes[i].ds == -1) && !(im->extra_flags & ALLOW_MISSING_DS)) {
             rrd_set_error("No DS called '%s' in '%s'",
                           im->gdes[i].ds_nam, im->gdes[i].rrd);
             return -1;
-- 
2.47.2