Allow init-less destructing bindings in for/in and for/of

test/tests-harmony.js

@@ -15522,6 +15522,47 @@ test("[x,,] = 1", {
   ]
 }, {ecmaVersion: 6});
 
+test("for (var [name, value] in obj) {}", {
+  body: [
+    {
+      left: {
+        declarations: [
+          {
+            id: {
+              elements: [
+                {
+                  name: "name",
+                  type: "Identifier"
+                },
+                {
+                  name: "value",
+                  type: "Identifier"
+                }
+              ],
+              type: "ArrayPattern"
+            },
+            init: null,
+            type: "VariableDeclarator"
+          }
+        ],
+        kind: "var",
+        type: "VariableDeclaration"
+      },
+      right: {
+        name: "obj",
+        type: "Identifier"
+      },
+      body: {
+        body: [],
+        type: "BlockStatement"
+      },
+      type: "ForInStatement"
+    }
+  ],
+  sourceType: "script",
+  type: "Program"
+}, {ecmaVersion: 6})
+
 testFail("let [x]", "Complex binding patterns require an initialization value (1:7)", {ecmaVersion: 6})
 testFail("var [x]", "Complex binding patterns require an initialization value (1:7)", {ecmaVersion: 6})
 testFail("var _𖫵 = 11;", "Unexpected character '𖫵' (1:5)", {ecmaVersion: 6});