npm and error messages

node_modules/es5-ext/function/#/lock.js

@@ -0,0 +1,14 @@
+"use strict";
+
+var callable = require("../../object/valid-callable")
+
+  , apply    = Function.prototype.apply;
+
+module.exports = function (/* …args*/) {
+	var fn = callable(this)
+	  , args = arguments;
+
+	return function () {
+ return apply.call(fn, this, args);
+};
+};