From 93f9d7ae2300729363319c02b6e1d7795dc9b0d1 Mon Sep 17 00:00:00 2001
From: tobspr <tobias.springer1@googlemail.com>
Date: Tue, 18 Aug 2020 20:12:18 +0200
Subject: [PATCH] Fix cutter

---
 src/js/game/systems/logic_gate.js | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/src/js/game/systems/logic_gate.js b/src/js/game/systems/logic_gate.js
index faf95110..6914410e 100644
--- a/src/js/game/systems/logic_gate.js
+++ b/src/js/game/systems/logic_gate.js
@@ -226,6 +226,10 @@ export class LogicGateSystem extends GameSystemWithFilter {
 
         const definition = /** @type {ShapeItem} */ (item).definition;
         const lowerLayer = /** @type {import("../shape_definition").ShapeLayer} */ (definition.layers[0]);
+        if (!lowerLayer) {
+            return [null, null];
+        }
+
         const topRightContent = lowerLayer[0];
 
         if (!topRightContent || topRightContent.subShape === null) {
@@ -263,8 +267,12 @@ export class LogicGateSystem extends GameSystemWithFilter {
         const definition = /** @type {ShapeItem} */ (item).definition;
         const result = this.root.shapeDefinitionMgr.shapeActionCutHalf(definition);
         return [
-            this.root.shapeDefinitionMgr.getShapeItemFromDefinition(result[0]),
-            this.root.shapeDefinitionMgr.getShapeItemFromDefinition(result[1]),
+            result[0].isEntirelyEmpty()
+                ? null
+                : this.root.shapeDefinitionMgr.getShapeItemFromDefinition(result[0]),
+            result[1].isEntirelyEmpty()
+                ? null
+                : this.root.shapeDefinitionMgr.getShapeItemFromDefinition(result[1]),
         ];
     }