From ba533f6f4d9bda3d351b8d2e457df2ef55e74cc0 Mon Sep 17 00:00:00 2001
From: cha0s <git@cha0s.io>
Date: Sat, 17 Sep 2022 09:07:29 -0500
Subject: [PATCH] chore: check

---
 packages/ecs/src/component/base.js | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/packages/ecs/src/component/base.js b/packages/ecs/src/component/base.js
index 46b6991..1a3bbf1 100644
--- a/packages/ecs/src/component/base.js
+++ b/packages/ecs/src/component/base.js
@@ -41,7 +41,16 @@ export default class BaseComponent {
   }
 
   destroyMany(entities) {
-    this.freeMany(entities.map((entity) => this.map[entity]).filter((index) => !!index));
+    this.freeMany(
+      entities
+        .map((entity) => {
+          if (entity in this.map) {
+            return this.map[entity];
+          }
+          throw new Error(`can't free for non-existent entity ${entity}`);
+        })
+        .filter((index) => !!index),
+    );
     for (let i = 0; i < entities.length; i++) {
       this.map[entities[i]] = undefined;
     }