From 06346428124259ecbf75fb5162c0f5f555474a80 Mon Sep 17 00:00:00 2001
From: Stewart Allen <stewart.allen@gmail.com>
Date: Sat, 16 Oct 2021 11:57:48 -0400
Subject: [PATCH] fix union for synth objects like cam tabs

---
 src/geo/polygon.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/geo/polygon.js b/src/geo/polygon.js
index 2aced57f..979a7396 100644
--- a/src/geo/polygon.js
+++ b/src/geo/polygon.js
@@ -1789,8 +1789,8 @@
                     if (leftmost(dst[0], dst[1]) === dst[1]) {
                         dst.reverse();
                     }
-
                     if (
+                        src[0].poly && src[1].poly && // missing for cam tabs
                         src[0].isEqual2D(dst[0]) &&
                         src[1].isEqual2D(dst[1]) &&
                         src[0].poly.areaOrLength(dst[0].poly) &&