From 2ca34cddac81051587e26f6c1dc212f0b57abc76 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?J=C3=BCrg=20Lehni?= <juerg@scratchdisk.com>
Date: Sun, 15 Jan 2017 18:43:47 +0100
Subject: [PATCH] Prevent rare case where we get excluded intersections without
 valid curves at the start.

---
 src/path/PathItem.Boolean.js | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/path/PathItem.Boolean.js b/src/path/PathItem.Boolean.js
index 3b9ce1d1..1ccc3b23 100644
--- a/src/path/PathItem.Boolean.js
+++ b/src/path/PathItem.Boolean.js
@@ -321,7 +321,8 @@ PathItem.inject(new function() {
             if (exclude) {
                 // Store excluded locations for later renormalization, in case
                 // the same curve is divided to their left.
-                renormalizeLocs.push(loc);
+                if (renormalizeLocs)
+                    renormalizeLocs.push(loc);
                 continue;
             } else if (include) {
                 results.unshift(loc);