Destructuring/default tests for generators and async functions

This patch adds additional tests for async functions and generators, in how
they interact with destructuring, default arguments and shadow parameter
copying.

BUG=v8:5167

Review-Url: https://codereview.chromium.org/2229243002
Cr-Commit-Position: refs/heads/master@{#38560}

test/mjsunit/es6/default-parameters.js

@@ -350,14 +350,15 @@
 (function TestDirectiveThrows() {
   "use strict";
 
-  assertThrows(function(){ eval("function(x=1){'use strict';}") }, SyntaxError);
-  assertThrows(function(){ eval("(x=1) => {'use strict';}") }, SyntaxError);
-  assertThrows(
-    function(){ eval("(class{foo(x=1) {'use strict';}});") }, SyntaxError);
-
-  assertThrows(
-    function(){ eval("function(a, x=1){'use strict';}") }, SyntaxError);
-  assertThrows(function(){ eval("(a, x=1) => {'use strict';}") }, SyntaxError);
-  assertThrows(
-    function(){ eval("(class{foo(a, x=1) {'use strict';}});") }, SyntaxError);
+  assertThrows("(function(x=1){'use strict';})", SyntaxError);
+  assertThrows("(x=1) => {'use strict';}", SyntaxError);
+  assertThrows("(class{foo(x=1) {'use strict';}});", SyntaxError);
+
+  assertThrows("(function(a, x=1){'use strict';})", SyntaxError);
+  assertThrows("(a, x=1) => {'use strict';}", SyntaxError);
+  assertThrows("(class{foo(a, x=1) {'use strict';}});", SyntaxError);
+
+  assertThrows("(function({x}){'use strict';})", SyntaxError);
+  assertThrows("({x}) => {'use strict';}", SyntaxError);
+  assertThrows("(class{foo({x}) {'use strict';}});", SyntaxError);
 })();

test/mjsunit/es6/destructuring.js

@@ -1045,9 +1045,9 @@
 
   function f20({x}) { function x() { return 2 }; return x(); }
   assertEquals(2, f20({x: 1}));
-  // Function hoisting is blocked by the conflicting x declaration
-  function f21({x}) { { function x() { return 2 } } return x(); }
-  assertThrows(() => f21({x: 1}), TypeError);
+  // Annex B 3.3 function hoisting is blocked by the conflicting x declaration
+  function f21({x}) { { function x() { return 2 } } return x; }
+  assertEquals(1, f21({x: 1}));
 
   var g1 = ({x}) => { var x = 2; return x };
   assertEquals(2, g1({x: 1}));
@@ -1082,15 +1082,15 @@
   var g21 = ({x}) => { { function x() { return 2 } } return x(); }
   assertThrows(() => g21({x: 1}), TypeError);
 
-  assertThrows("'use strict'; function f(x) { let x = 0; }; f({});", SyntaxError);
-  assertThrows("'use strict'; function f({x}) { let x = 0; }; f({});", SyntaxError);
-  assertThrows("'use strict'; function f(x) { const x = 0; }; f({});", SyntaxError);
-  assertThrows("'use strict'; function f({x}) { const x = 0; }; f({});", SyntaxError);
+  assertThrows("'use strict'; function f(x) { let x = 0; }", SyntaxError);
+  assertThrows("'use strict'; function f({x}) { let x = 0; }", SyntaxError);
+  assertThrows("'use strict'; function f(x) { const x = 0; }", SyntaxError);
+  assertThrows("'use strict'; function f({x}) { const x = 0; }", SyntaxError);
 
-  assertThrows("'use strict'; let g = (x) => { let x = 0; }; f({});", SyntaxError);
-  assertThrows("'use strict'; let g = ({x}) => { let x = 0; }; f({});", SyntaxError);
-  assertThrows("'use strict'; let g = (x) => { const x = 0; }; f({});", SyntaxError);
-  assertThrows("'use strict'; let g = ({x}) => { const x = 0; }; f({});", SyntaxError);
+  assertThrows("'use strict'; let g = (x) => { let x = 0; }", SyntaxError);
+  assertThrows("'use strict'; let g = ({x}) => { let x = 0; }", SyntaxError);
+  assertThrows("'use strict'; let g = (x) => { const x = 0; }", SyntaxError);
+  assertThrows("'use strict'; let g = ({x}) => { const x = 0; }", SyntaxError);
 }());