From 3d993e99d03891e4fcd1b7b9d31c285fe05c0897 Mon Sep 17 00:00:00 2001
From: Stewart Allen <stewart.allen@gmail.com>
Date: Wed, 24 Feb 2021 04:22:10 -0500
Subject: [PATCH] fixes #109 Uncaught TypeError

---
 src/mode/fdm/prepare.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/mode/fdm/prepare.js b/src/mode/fdm/prepare.js
index be1c7c07..8db5507c 100644
--- a/src/mode/fdm/prepare.js
+++ b/src/mode/fdm/prepare.js
@@ -68,7 +68,7 @@
                 offset = process.outputBrimOffset || (process.outputRaft ? 4 : 0);
 
             // compute first brim
-            widgets.forEach(function(widget) {
+            widgets.filter(w => w.slices.length).forEach(function(widget) {
                 let tops = [];
                 // collect top outer polygons
                 widget.slices[0].tops.forEach(function(top) {