prevent double get of @@(async)iterator property

zloirock · Aug 28, 2021 · 5bb48b3 · 5bb48b3
1 parent 9773ec3
commit 5bb48b3
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Showing 3 changed files with 7 additions and 7 deletions.
diff --git a/packages/core-js/internals/get-async-iterator.js b/packages/core-js/internals/get-async-iterator.js
@@ -7,8 +7,8 @@ var wellKnownSymbol = require('../internals/well-known-symbol');
 
 var ASYNC_ITERATOR = wellKnownSymbol('asyncIterator');
 
-module.exports = function (it) {
-  var method = getMethod(it[ASYNC_ITERATOR]);
+module.exports = function (it, usingIterator) {
+  var method = arguments.length < 2 ? getMethod(it[ASYNC_ITERATOR]) : usingIterator;
   if (method === undefined) {
     return new AsyncFromSyncIterator(getIterator(it));
   } return anObject(aFunction(method).call(it));

diff --git a/packages/core-js/internals/get-iterator.js b/packages/core-js/internals/get-iterator.js
@@ -1,8 +1,8 @@
 var anObject = require('../internals/an-object');
 var getIteratorMethod = require('../internals/get-iterator-method');
 
-module.exports = function (it) {
-  var iteratorMethod = getIteratorMethod(it);
+module.exports = function (it, usingIterator) {
+  var iteratorMethod = arguments.length < 2 ? getIteratorMethod(it) : usingIterator;
   if (typeof iteratorMethod != 'function') {
     throw TypeError(String(it) + ' is not iterable');
   } return anObject(iteratorMethod.call(it));

diff --git a/packages/core-js/modules/esnext.async-iterator.from.js b/packages/core-js/modules/esnext.async-iterator.from.js
@@ -1,11 +1,11 @@
 // https://github.com/tc39/proposal-iterator-helpers
 var $ = require('../internals/export');
 var path = require('../internals/path');
-var aFunction = require('../internals/a-function');
 var anObject = require('../internals/an-object');
 var toObject = require('../internals/to-object');
 var createAsyncIteratorProxy = require('../internals/async-iterator-create-proxy');
 var getAsyncIterator = require('../internals/get-async-iterator');
+var getIterator = require('../internals/get-iterator');
 var getIteratorMethod = require('../internals/get-iterator-method');
 var getMethod = require('../internals/get-method');
 var wellKnownSymbol = require('../internals/well-known-symbol');
@@ -25,12 +25,12 @@ $({ target: 'AsyncIterator', stat: true }, {
     var usingIterator = getMethod(object[ASYNC_ITERATOR]);
     var iterator;
     if (usingIterator !== undefined) {
-      iterator = getAsyncIterator(object);
+      iterator = getAsyncIterator(object, usingIterator);
       if (iterator instanceof AsyncIterator) return iterator;
     }
     if (iterator === undefined) {
       usingIterator = getIteratorMethod(object);
-      if (usingIterator !== undefined) return new AsyncFromSyncIterator(aFunction(usingIterator).call(object));
+      if (usingIterator !== undefined) return new AsyncFromSyncIterator(getIterator(object, usingIterator));
     }
     return new AsyncIteratorProxy({
       iterator: iterator !== undefined ? iterator : object