From 0aad5ef5ed98103c8f68fbc09421389acae85ee0 Mon Sep 17 00:00:00 2001
From: Jaime van Kessel <nallath@gmail.com>
Date: Wed, 21 Sep 2016 11:33:25 +0200
Subject: [PATCH] Prevent exceptions when spine is empty

CURA-2083
---
 plugins/X3DReader/X3DReader.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/plugins/X3DReader/X3DReader.py b/plugins/X3DReader/X3DReader.py
index 42efbe84ef..f1c217da9d 100644
--- a/plugins/X3DReader/X3DReader.py
+++ b/plugins/X3DReader/X3DReader.py
@@ -425,6 +425,8 @@ class X3DReader(MeshReader):
             # All the spines are collinear. Fallback to the rotated source
             # XZ plane.
             # TODO: handle the situation where the first two spine points match
+            if len(spine) < 2:
+                return Vector(0, 0, 1)
             v = spine[1] - spine[0]
             orig_y = Vector(0, 1, 0)
             orig_z = Vector(0, 0, 1)