Make generators non-constructable

test/mjsunit/es6/generators-objects.js

Index: test/mjsunit/es6/generators-objects.js
diff --git a/test/mjsunit/es6/generators-objects.js b/test/mjsunit/es6/generators-objects.js
index 9390776761607df9c963479e1c601e61c331fff9..2833dd8994550fb92f6fd8482247ebe99b68a930 100644
--- a/test/mjsunit/es6/generators-objects.js
+++ b/test/mjsunit/es6/generators-objects.js
@@ -60,9 +60,6 @@ function TestGeneratorObject() {
   assertEquals([], Object.getOwnPropertyNames(iter));
   assertTrue(iter !== g());
 
-  // g() is the same as new g().
-  iter = new g();
-  assertSame(g.prototype, Object.getPrototypeOf(iter));
   assertTrue(iter instanceof g);
   assertEquals("Generator", %_ClassOf(iter));
   assertEquals("[object Generator]", String(iter));

[neis, 2016/01/14 10:55:23]

These three are duplicates now.

@@ -70,7 +67,10 @@ function TestGeneratorObject() {
   var gf = iter.__proto__.constructor;
   assertEquals("[object GeneratorFunction]", Object.prototype.toString.call(gf));
   assertEquals([], Object.getOwnPropertyNames(iter));
-  assertTrue(iter !== new g());
+  assertTrue(iter !== g());
+
+  // generators are not constructable.
+  assertThrows(()=>new g());
 }
 TestGeneratorObject();