From bea18e91aa08ac3ef6fb6fb07f5db5ea88e5c05c Mon Sep 17 00:00:00 2001
From: Zach Pomerantz <zach@highfidelity.io>
Date: Mon, 28 Dec 2015 15:09:49 -0800
Subject: [PATCH] Guard against empty polyline index out of range

---
 .../entities-renderer/src/RenderablePolyLineEntityItem.cpp   | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/libraries/entities-renderer/src/RenderablePolyLineEntityItem.cpp b/libraries/entities-renderer/src/RenderablePolyLineEntityItem.cpp
index cfdcc87121..7b3bbc4c02 100644
--- a/libraries/entities-renderer/src/RenderablePolyLineEntityItem.cpp
+++ b/libraries/entities-renderer/src/RenderablePolyLineEntityItem.cpp
@@ -141,6 +141,11 @@ void RenderablePolyLineEntityItem::updateVertices() {
         _vertices << v1 << v2;
     }
 
+    // Guard against an empty polyline
+    if (finalIndex < 0) {
+        return;
+    }
+
     // For last point we can assume binormals are the same since it represents the last two vertices of quad
     point = _points.at(finalIndex);
     v1 = point + binormal;