add test

Fix location with optional params in arrow functions

Do not use lookahead when parsing construct signature declarations

use console.warn for warning (#9992)

Only compute Position if not already in state (#9989)

Adding "[object NodeList]" === Object.prototype.toString.call(iter) to check if object is eligible for Array.from() call for _toConsumableArray(arr). In IE11, the object returns the former string rather than "[object Arguments]" as already covered.