From: Emden R. Gansner <erg@gentoo.research.att.com>
Date: Fri, 23 Aug 2013 01:56:20 +0000 (-0400)
Subject: Fix bug 2327
X-Git-Tag: LAST_LIBGRAPH~32^2~61
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=0c3535252d1353eb5ed9b2c461e436131d00b813;p=graphviz

Fix bug 2327
---

diff --git a/cmd/tools/gvpack.c b/cmd/tools/gvpack.c
index b085510dc..52f16ed96 100644
--- a/cmd/tools/gvpack.c
+++ b/cmd/tools/gvpack.c
@@ -899,6 +899,10 @@ static Agraph_t **readGraphs(int *cp, GVC_t* gvc)
     while ((g = nextGraph(&ig)) != 0) {
 	if (verbose)
 	    fprintf(stderr, "Reading graph %s\n", agnameof(g));
+	if (agnnodes(g) == 0) {
+	    fprintf(stderr, "Graph %s is empty - ignoring\n", agnameof(g));
+	    continue;
+	}
 	if (cnt >= sz) {
 	    sz += nGraphs;
 	    gs = ALLOC(sz, gs, Agraph_t *);