From 0c6683920a34b61f9dabb2a831b2eff64c56ef29 Mon Sep 17 00:00:00 2001
From: Stewart Allen <stewart.allen@gmail.com>
Date: Thu, 30 Dec 2021 17:39:25 -0500
Subject: [PATCH] handle missing thin fill array

---
 src/kiri/print.js | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/kiri/print.js b/src/kiri/print.js
index c8b3fc9f..99a1bd8d 100644
--- a/src/kiri/print.js
+++ b/src/kiri/print.js
@@ -835,6 +835,9 @@
         }
 
         function outputThin(lines) {
+            if (!lines) {
+                return;
+            }
             let points = lines.group(2).map(grp => {
                 let [ p1, p2 ] = grp;
                 return newPoint(