From 9dbbb97fb986eec416088fddf24ee945d7b5b5cf Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E6=9C=A8=E7=BE=BD?= <zwwill7@163.com>
Date: Wed, 17 Oct 2018 15:57:07 +0800
Subject: [PATCH] Update module-collection.js

Function `parent.getChild(key)` could return `undefined`
---
 src/module/module-collection.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/module/module-collection.js b/src/module/module-collection.js
index a68f05a51..30bc97522 100644
--- a/src/module/module-collection.js
+++ b/src/module/module-collection.js
@@ -49,7 +49,7 @@ export default class ModuleCollection {
   unregister (path) {
     const parent = this.get(path.slice(0, -1))
     const key = path[path.length - 1]
-    if (!parent.getChild(key).runtime) return
+    if (!parent.getChild(key) || !parent.getChild(key).runtime) return
 
     parent.removeChild(key)
   }