throw an error when destructuring a null or undefined value on an empty object pattern - fixes #681

test/fixtures/transformation/es6-destructuring/empty-object-pattern/actual.js

@@ -0,0 +1 @@
+var {} = null;

test/fixtures/transformation/es6-destructuring/empty-object-pattern/exec.js

@@ -0,0 +1,3 @@
+assert.throws(function () {
+  var {} = null;
+}, /Cannot destructure undefined/);

test/fixtures/transformation/es6-destructuring/empty-object-pattern/expected.js

@@ -0,0 +1,7 @@
+"use strict";
+
+var _objectDestructuringEmpty = function (obj) { if (obj == null) throw new TypeError("Cannot destructure undefined"); };
+
+var _ref = null;
+
+_objectDestructuringEmpty(_ref);