From 692fc2e4d903740a187a7d22e68ff3a385c6da5d Mon Sep 17 00:00:00 2001
From: Ian Park <vreality64@gmail.com>
Date: Tue, 4 Dec 2018 19:21:57 -0800
Subject: [PATCH] Fix bug in comparison logic of object property (#22348)

Summary:
`instance.hasOwnProperty` has potential danger because of some object could be eliminate own prototype chain. Update code be more reliable.

This PR is solution of #22308 issue. (Fixes #22308)
Pull Request resolved: https://github.com/facebook/react-native/pull/22348

Differential Revision: D13334882

Pulled By: cpojer

fbshipit-source-id: 9b9310a972e933af1962666d7b0c683ff43cc5b2
---
 Libraries/vendor/core/mergeInto.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Libraries/vendor/core/mergeInto.js b/Libraries/vendor/core/mergeInto.js
index d42b3dcf36ed3f..7ea0d50c7da6b1 100644
--- a/Libraries/vendor/core/mergeInto.js
+++ b/Libraries/vendor/core/mergeInto.js
@@ -47,7 +47,7 @@ function mergeInto(one, two) {
   if (two != null) {
     checkMergeObjectArg(two);
     for (var key in two) {
-      if (!two.hasOwnProperty(key)) {
+      if (!Object.prototype.hasOwnProperty.call(two, key)) {
         continue;
       }
       one[key] = two[key];