From 782ceb4b16c4ad6bc6a194edd38775e39b282d5e Mon Sep 17 00:00:00 2001
From: Nicholas Yang <ny585@nyu.edu>
Date: Thu, 31 Jan 2019 17:44:19 -0500
Subject: [PATCH] Added a Object.prototype.propertyIsEnumerable check to __rest
 to prevent enumerable symbols from sneaking through.

---
 src/compiler/transformers/destructuring.ts | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/compiler/transformers/destructuring.ts b/src/compiler/transformers/destructuring.ts
index cde5ee290a357..ab247b52555e1 100644
--- a/src/compiler/transformers/destructuring.ts
+++ b/src/compiler/transformers/destructuring.ts
@@ -521,8 +521,10 @@ namespace ts {
                 for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p) && e.indexOf(p) < 0)
                     t[p] = s[p];
                 if (s != null && typeof Object.getOwnPropertySymbols === "function")
-                    for (var i = 0, p = Object.getOwnPropertySymbols(s); i < p.length; i++) if (e.indexOf(p[i]) < 0)
-                        t[p[i]] = s[p[i]];
+                    for (var i = 0, p = Object.getOwnPropertySymbols(s); i < p.length; i++) {
+                        if (e.indexOf(p[i]) < 0 && Object.prototype.propertyIsEnumerable(p[i]))
+                            t[p[i]] = s[p[i]];
+                    }
                 return t;
             };`
     };