Throw a TypeError when calling "next" method of a newly created generator with a value

src/runtime.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 3120 matching lines @@
   CONVERT_ARG_HANDLE_CHECKED(JSGeneratorObject, generator, 0);
   int continuation = generator->continuation();
   const char* message = continuation == JSGeneratorObject::kGeneratorClosed ?
       "generator_finished" : "generator_running";
   Vector< Handle<Object> > argv = HandleVector<Object>(NULL, 0);
   Handle<Object> error = isolate->factory()->NewError(message, argv);
   return isolate->Throw(*error);
 }
 
 
+RUNTIME_FUNCTION(MaybeObject*, Runtime_ThrowGeneratorStartError) {
+  HandleScope scope(isolate);
+  ASSERT(args.length() == 0);
+  Vector< Handle<Object> > argv = HandleVector<Object>(NULL, 0);
+  Handle<Object> error =
+      isolate->factory()->NewTypeError("generator_start", argv);
+  return isolate->Throw(*error);
+}
+
+
 RUNTIME_FUNCTION(MaybeObject*, Runtime_ObjectFreeze) {
   HandleScope scope(isolate);
   ASSERT(args.length() == 1);
   CONVERT_ARG_HANDLE_CHECKED(JSObject, object, 0);
   Handle<Object> result = JSObject::Freeze(object);
   RETURN_IF_EMPTY_HANDLE(isolate, result);
   return *result;
 }
 
 
@@ skipping 11713 matching lines @@
     // Handle last resort GC and make sure to allow future allocations
     // to grow the heap without causing GCs (if possible).
     isolate->counters()->gc_last_resort_from_js()->Increment();
     isolate->heap()->CollectAllGarbage(Heap::kNoGCFlags,
                                        "Runtime::PerformGC");
   }
 }
 
 
 } }  // namespace v8::internal