1 files changed, 3 insertions, 18 deletions
diff --git a/node_modules/core-js/modules/es6.promise.js b/node_modules/core-js/modules/es6.promise.js
index 78e9791d7..88bf65d4c 100644
--- a/node_modules/core-js/modules/es6.promise.js
+++ b/node_modules/core-js/modules/es6.promise.js
@@ -36,12 +36,6 @@ var USE_NATIVE = !!function () {
 }();
 
 // helpers
-var sameConstructor = LIBRARY ? function (a, b) {
-  // with library wrapper special case
-  return a === b || a === $Promise && b === Wrapper;
-} : function (a, b) {
-  return a === b;
-};
 var isThenable = function (it) {
   var then;
   return isObject(it) && typeof (then = it.then) == 'function' ? then : false;
@@ -110,14 +104,7 @@ var onUnhandled = function (promise) {
   });
 };
 var isUnhandled = function (promise) {
-  if (promise._h == 1) return false;
-  var chain = promise._a || promise._c;
-  var i = 0;
-  var reaction;
-  while (chain.length > i) {
-    reaction = chain[i++];
-    if (reaction.fail || !isUnhandled(reaction.promise)) return false;
-  } return true;
+  return promise._h !== 1 && (promise._a || promise._c).length === 0;
 };
 var onHandleUnhandled = function (promise) {
   task.call(global, function () {
@@ -213,7 +200,7 @@ if (!USE_NATIVE) {
     this.reject = ctx($reject, promise, 1);
   };
   newPromiseCapabilityModule.f = newPromiseCapability = function (C) {
-    return sameConstructor($Promise, C)
+    return C === $Promise || C === Wrapper
       ? new OwnPromiseCapability(C)
       : newGenericPromiseCapability(C);
   };
@@ -237,9 +224,7 @@ $export($export.S + $export.F * !USE_NATIVE, PROMISE, {
 $export($export.S + $export.F * (LIBRARY || !USE_NATIVE), PROMISE, {
   // 25.4.4.6 Promise.resolve(x)
   resolve: function resolve(x) {
-    // instanceof instead of internal slot check because we should fix it without replacement native Promise core
-    if (x instanceof $Promise && sameConstructor(x.constructor, this)) return x;
-    return promiseResolve(this, x);
+    return promiseResolve(LIBRARY && this === Wrapper ? $Promise : this, x);
   }
 });
 $export($export.S + $export.F * !(USE_NATIVE && require('./_iter-detect')(function (iter) {