[parser] early error when declaration Pattern missing Initializer

test/mjsunit/harmony/destructuring.js

 // Copyright 2015 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 //
 // Flags: --harmony-destructuring
 // Flags: --harmony-default-parameters --harmony-rest-parameters
 
 (function TestObjectLiteralPattern() {
   var { x : x, y : y, get, set } = { x : 1, y : 2, get: 3, set: 4 };
   assertEquals(1, x);
@@ skipping 1086 matching lines @@
   assertThrows(
     function(){ eval("(class{foo(a, {}) {'use strict';}});") }, SyntaxError);
 })();
 
 (function TestLegacyConstDestructuringInForLoop() {
   var result;
   for (const {foo} of [{foo: 1}]) { result = foo; }
   assertEquals(1, result);
 })();
 
-(function TestDestructuringArrayWithoutInitializer() {
-  assertThrows('var [foo]', TypeError);
+(function TestDeclDestructuringArrayWithoutInitializer() {

[adamk, 2015/11/03 20:13:53]

Could you make this and the below into message tests instead? Then you'll also
be covering the position information with the test case.

+  assertThrows('var [foo]', SyntaxError);
 })();
+
+(function TestDeclDestructuringObjectWithoutInitializer() {
+  assertThrows('var {foo}', SyntaxError);
+})();