From 5b6cf86150f8f8a8737a1d1c593f899dbc3438ac Mon Sep 17 00:00:00 2001
From: erg <devnull@localhost>
Date: Tue, 12 Aug 2008 20:35:52 +0000
Subject: [PATCH] Fix bug 1416 (but expose bug 1417).

---
 lib/dotgen/mincross.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/lib/dotgen/mincross.c b/lib/dotgen/mincross.c
index c21fac399..0cec68e61 100644
--- a/lib/dotgen/mincross.c
+++ b/lib/dotgen/mincross.c
@@ -695,7 +695,8 @@ void flat_rev(Agraph_t * g, Agedge_t * e)
     int j;
     Agedge_t *rev;
 
-    for (j = 0; (rev = ND_flat_out(e->head).list[j]); j++)
+    if (!ND_flat_out(e->head).list) rev = NULL;
+    else for (j = 0; (rev = ND_flat_out(e->head).list[j]); j++)
 	if (rev->head == e->tail)
 	    break;
     if (rev) {
-- 
2.40.0