From 2bd456d77bd035aadff61122868d02291f7898ea Mon Sep 17 00:00:00 2001
From: Mattias Ellert <mattias.ellert@fysast.uu.se>
Date: Wed, 28 May 2014 07:05:49 +0200
Subject: [PATCH] Break infinite recursion that leads to segfault.

---
 lib/dotgen/compound.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/lib/dotgen/compound.c b/lib/dotgen/compound.c
index ac78cd5..7156103 100644
--- a/lib/dotgen/compound.c
+++ b/lib/dotgen/compound.c
@@ -176,6 +176,9 @@ findVertical(pointf * pts, double tmin, double tmax,
     double t;
     int no_cross = countVertCross(pts, xcoord);
 
+    if (tmin >= tmax)
+	return -1.0;
+
     if (no_cross == 0)
 	return -1.0;
 
@@ -214,6 +217,9 @@ findHorizontal(pointf * pts, double tmin, double tmax,
     double t;
     int no_cross = countHorzCross(pts, ycoord);
 
+    if (tmin >= tmax)
+	return -1.0;
+
     if (no_cross == 0)
 	return -1.0;
 
-- 
1.9.3