fix up async/await

acorn.js

@@ -2075,7 +2075,7 @@
               retNode = finishNode(retNode, "AssignmentExpression");
             }
             else {
-              unexpected
+              unexpected();
             }
             semicolon();
           }
@@ -2649,6 +2649,8 @@
       }
       if (options.ecmaVersion >= 6) {
         isGenerator = eat(_star);
+        prop.method = false;
+        prop.shorthand = false;
       }
       
       if (tokType === _name || tokType.keyword) {
@@ -2659,18 +2661,9 @@
         if (isAsync && isGenerator) {
           unexpected();
         }
-        if (options.ecmaVersion >= 6) {
-          prop.method = false;
-          prop.shorthand = false;
-        }
         parsePropertyName(prop);
       }
       else if (tokType === _colon) {
-        // key could be "async"
-        if (options.ecmaVersion >= 6) {
-          prop.method = false;
-          prop.shorthand = false;
-        }
         isAsync = false;
       }
       else if (tokType === _bracketL) {

test/tests-harmony.js

@@ -14716,7 +14716,7 @@ test("var async; async = 10;", {
   locations: true
 });
 
-test("var {a, async} = b;" {
+test("var {a, async} = b;", {
   "type": "Program",
   "start": 0,
   "end": 19,