From: Matthew Fernandez <matthew.fernandez@gmail.com>
Date: Sat, 24 Apr 2021 03:02:44 +0000 (-0700)
Subject: anticipate failure from addPEdges
X-Git-Tag: 2.47.2~13^2~25
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=11e7db720e64a6b6f4aa075b8c193f2fd0193948;p=graphviz

anticipate failure from addPEdges

Related to #1801.
---

diff --git a/lib/ortho/ortho.c b/lib/ortho/ortho.c
index 13f01bbce..19d1a937c 100644
--- a/lib/ortho/ortho.c
+++ b/lib/ortho/ortho.c
@@ -1075,7 +1075,9 @@ add_p_edges (Dt_t* chans, maze* mp)
     for (l1 = dtflatten (chans); l1; l1 = dtlink(chans,l1)) {
 	lp = ((chanItem*)l1)->chans;
 	for (l2 = dtflatten (lp); l2; l2 = dtlink(lp,l2)) {
-	    addPEdges ((channel*)l2, mp);
+	    if (addPEdges((channel*)l2, mp) != 0) {
+	        return -1;
+	    }
    	}
     }