Bump to v4.13.0.

isNative.js

@@ -1,34 +1,16 @@
-import isFunction from './isFunction';
-import isHostObject from './_isHostObject';
-import isObject from './isObject';
-import toSource from './_toSource';
+import baseIsNative from './_baseIsNative.js';
+import isMaskable from './_isMaskable.js';
 
 /**
- * Used to match `RegExp`
- * [syntax characters](http://ecma-international.org/ecma-262/6.0/#sec-patterns).
- */
-var reRegExpChar = /[\\^$.*+?()[\]{}|]/g;
-
-/** Used to detect host constructors (Safari). */
-var reIsHostCtor = /^\[object .+?Constructor\]$/;
-
-/** Used for built-in method references. */
-var objectProto = Object.prototype;
-
-/** Used to resolve the decompiled source of functions. */
-var funcToString = Function.prototype.toString;
-
-/** Used to check objects for own properties. */
-var hasOwnProperty = objectProto.hasOwnProperty;
-
-/** Used to detect if a method is native. */
-var reIsNative = RegExp('^' +
-  funcToString.call(hasOwnProperty).replace(reRegExpChar, '\\$&')
-  .replace(/hasOwnProperty|(function).*?(?=\\\()| for .+?(?=\\\])/g, '$1.*?') + '$'
-);
-
-/**
- * Checks if `value` is a native function.
+ * Checks if `value` is a pristine native function.
+ *
+ * **Note:** This method can't reliably detect native functions in the
+ * presence of the `core-js` package because `core-js` circumvents this kind
+ * of detection. Despite multiple requests, the `core-js` maintainer has made
+ * it clear: any attempt to fix the detection will be obstructed. As a result,
+ * we're left with little choice but to throw an error. Unfortunately, this
+ * also affects packages, like [babel-polyfill](https://www.npmjs.com/package/babel-polyfill),
+ * which rely on `core-js`.
  *
  * @static
  * @memberOf _
@@ -46,11 +28,10 @@ var reIsNative = RegExp('^' +
  * // => false
  */
 function isNative(value) {
-  if (!isObject(value)) {
-    return false;
+  if (isMaskable(value)) {
+    throw new Error('This method is not supported with `core-js`. Try https://github.com/es-shims.');
   }
-  var pattern = (isFunction(value) || isHostObject(value)) ? reIsNative : reIsHostCtor;
-  return pattern.test(toSource(value));
+  return baseIsNative(value);
 }
 
 export default isNative;