An object should only be promoted to the old generation if it survived a scavenge operation.

test/cctest/test-api.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 19812 matching lines @@
 TEST(PersistentHandleInNewSpaceVisitor) {
   LocalContext context;
   v8::Isolate* isolate = context->GetIsolate();
   v8::HandleScope scope(isolate);
   v8::Persistent<v8::Object> object1(isolate, v8::Object::New(isolate));
   CHECK_EQ(0, object1.WrapperClassId());
   object1.SetWrapperClassId(42);
   CHECK_EQ(42, object1.WrapperClassId());
 
   CcTest::heap()->CollectAllGarbage(i::Heap::kNoGCFlags);
+  CcTest::heap()->CollectAllGarbage(i::Heap::kNoGCFlags);
 
   v8::Persistent<v8::Object> object2(isolate, v8::Object::New(isolate));
   CHECK_EQ(0, object2.WrapperClassId());
   object2.SetWrapperClassId(42);
   CHECK_EQ(42, object2.WrapperClassId());
 
   Visitor42 visitor(&object2);
   v8::V8::VisitHandlesForPartialDependence(isolate, &visitor);
   CHECK_EQ(1, visitor.counter_);
 
@@ skipping 2956 matching lines @@
     call_eval_context = v8::Context::New(isolate);
     v8::Context::Scope scope(call_eval_context);
     call_eval_bound_function =
         Local<Function>::Cast(CompileRun("eval.bind(this, '1')"));
   }
   env->Global()->Set(v8_str("CallEval"),
       v8::FunctionTemplate::New(isolate, CallEval)->GetFunction());
   Local<Value> result = CompileRun("CallEval();");
   CHECK_EQ(result, v8::Integer::New(isolate, 1));
 }