From 4af6233ac66ecf0c9d0c9802e96abe065511bd34 Mon Sep 17 00:00:00 2001
From: Denis Pushkarev <zloirock@zloirock.ru>
Date: Tue, 27 Oct 2020 21:04:09 +0700
Subject: [PATCH] add a workaround for 3rd party `Reflect.set` polyfill bug,
 #847

---
 CHANGELOG.md                               | 1 +
 packages/core-js/modules/es.reflect.set.js | 5 +++--
 2 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 76ce94948edf..48af8af2f6c0 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,7 @@
 ##### Unreleased
 - `String#replaceAll` moved to the stable ES, [per Jun TC39 meeting](https://github.com/tc39/notes/blob/master/meetings/2020-06/june-2.md#stringprototypereplaceall-for-stage-4)
 - `process.nextTick` have a less priority when `Promise` in the microtask implementation, [#855](https://github.com/zloirock/core-js/issues/855)
+- Added a workaround for 3rd party `Reflect.set` polyfill bug, [#847](https://github.com/zloirock/core-js/issues/847)
 
 ##### 3.6.5 - 2020.04.09
 - Updated Browserlist [#755](https://github.com/zloirock/core-js/issues/755)
diff --git a/packages/core-js/modules/es.reflect.set.js b/packages/core-js/modules/es.reflect.set.js
index a16b762e168f..9949bb3afcaa 100644
--- a/packages/core-js/modules/es.reflect.set.js
+++ b/packages/core-js/modules/es.reflect.set.js
@@ -35,9 +35,10 @@ function set(target, propertyKey, V /* , receiver */) {
 // MS Edge 17-18 Reflect.set allows setting the property to object
 // with non-writable property on the prototype
 var MS_EDGE_BUG = fails(function () {
-  var object = definePropertyModule.f({}, 'a', { configurable: true });
+  var Constructor = function () { /* empty */ };
+  var object = definePropertyModule.f(new Constructor(), 'a', { configurable: true });
   // eslint-disable-next-line no-undef
-  return Reflect.set(getPrototypeOf(object), 'a', 1, object) !== false;
+  return Reflect.set(Constructor.prototype, 'a', 1, object) !== false;
 });
 
 $({ target: 'Reflect', stat: true, forced: MS_EDGE_BUG }, {