From 0d7e16190dace2e8af3c81fe6c4e28c892bca35d Mon Sep 17 00:00:00 2001
From: cilame <opaquism@hotmail.com>
Date: Mon, 29 Nov 2021 14:12:20 +0800
Subject: [PATCH] Update env_maker.js

---
 tools/env_maker.js | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/tools/env_maker.js b/tools/env_maker.js
index 16e57c5..5593af8 100644
--- a/tools/env_maker.js
+++ b/tools/env_maker.js
@@ -408,6 +408,9 @@ function hook_obj(r,n){
         }
       }
       if (b == '__proto__' && !_isvm){ // vm2 使用时就不好处理 this.__proto__ = window.__proto__ ，需注意
+        if (!a[_y]){
+          a[_y] = {}
+        }
         if (!a[_y]['fake__proto__']){
           a[_y]['fake__proto__'] = hook_obj(a[b],n+'.__proto__')
         }