for-of should throw if result object is not an object

src/runtime/runtime-generator.cc

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/v8.h"
 
 #include "src/arguments.h"
 #include "src/frames-inl.h"
 #include "src/runtime/runtime-utils.h"
 
@@ skipping 205 matching lines @@
 RUNTIME_FUNCTION(RuntimeReference_GeneratorNext) {
   UNREACHABLE();  // Optimization disabled in SetUpGenerators().
   return NULL;
 }
 
 
 RUNTIME_FUNCTION(RuntimeReference_GeneratorThrow) {
   UNREACHABLE();  // Optimization disabled in SetUpGenerators().
   return NULL;
 }
+
+
+RUNTIME_FUNCTION(Runtime_ThrowIteratorResultNotAnObject) {

[arv (Not doing code reviews), 2015/02/23 22:02:24]

I wasn't sure if this was the best place to put this.

+  HandleScope scope(isolate);
+  DCHECK(args.length() == 1);
+  CONVERT_ARG_HANDLE_CHECKED(Object, value, 0);
+
+  Handle<Object> error_args[] = {value};
+  THROW_NEW_ERROR_RETURN_FAILURE(
+      isolate, NewTypeError("iterator_result_not_an_object",
+                            HandleVector(error_args, arraysize(error_args))));
+}
 }
 }  // namespace v8::internal