From 50fefa0c7ab91e56f770d9315d55b908f7311bdf Mon Sep 17 00:00:00 2001
From: Denis Pushkarev <zloirock@zloirock.ru>
Date: Sun, 24 Jan 2016 19:17:46 +0600
Subject: [PATCH] add note about possible `Symbol` polyfill problems with
 environment exotic objects, close #163

---
 README.md | 1 +
 1 file changed, 1 insertion(+)

diff --git a/README.md b/README.md
index 8ffd944b5127..327a6af49577 100644
--- a/README.md
+++ b/README.md
@@ -841,6 +841,7 @@ o2[s2] = true;
 for(var key in o2)console.log(key); // nothing
 ```
 * Currently, `core-js` not adds setters to `Object.prototype` for well-known symbols for correct work something like `Symbol.iterator in foo`. It can cause problems with their enumerability.
+* Some problems possible with environment exotic objects (for example, IE `localStorage`).
 
 #### ECMAScript 6: Collections
 `core-js` uses native collections in most case, just fixes methods / constructor, if it's required, and in old environment uses fast polyfill (O(1) lookup).