From 0195047d7a7019ebb0c5fcb1b2b87220133564fe Mon Sep 17 00:00:00 2001
From: Raul Marin <git@rmr.ninja>
Date: Fri, 11 May 2018 11:58:41 +0200
Subject: [PATCH] Marker symbolizer: Fix bug with lines with 0 length (division
 by zero)

---
 include/mapnik/geom_util.hpp | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/include/mapnik/geom_util.hpp b/include/mapnik/geom_util.hpp
index 49aa06a6a..bdae5b156 100755
--- a/include/mapnik/geom_util.hpp
+++ b/include/mapnik/geom_util.hpp
@@ -314,6 +314,12 @@ bool middle_point(PathType & path, double & x, double & y, boost::optional<doubl
     path.rewind(0);
     unsigned command = path.vertex(&x0,&y0);
     if (command == SEG_END) return false;
+    if (std::abs(mid_length) < std::numeric_limits<double>::epsilon())
+    {
+        x = x0;
+        y = y0;
+        return true;
+    }
     double dist = 0.0;
     while (SEG_END != (command = path.vertex(&x1, &y1)))
     {