Return empty handle if GetPropertyByLookup has no result.

src/api.cc

 // Copyright 2012 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/api.h"
 
 #include <string.h>  // For memcpy, strlen.
 #ifdef V8_USE_ADDRESS_SANITIZER
 #include <sanitizer/asan_interface.h>
 #endif  // V8_USE_ADDRESS_SANITIZER
@@ skipping 3553 matching lines @@
 }
 
 
 static Local<Value> GetPropertyByLookup(i::LookupIterator* it) {
   // If the property being looked up is a callback, it can throw an exception.
   EXCEPTION_PREAMBLE(it->isolate());
   i::Handle<i::Object> result;
   has_pending_exception = !i::Object::GetProperty(it).ToHandle(&result);
   EXCEPTION_BAILOUT_CHECK(it->isolate(), Local<Value>());
 
-  return Utils::ToLocal(result);
+  if (it->IsFound()) return Utils::ToLocal(result);
+  return Local<Value>();
 }
 
 
 Local<Value> v8::Object::GetRealNamedPropertyInPrototypeChain(
     Handle<String> key) {
   i::Isolate* isolate = Utils::OpenHandle(this)->GetIsolate();
   ON_BAILOUT(isolate,
              "v8::Object::GetRealNamedPropertyInPrototypeChain()",
              return Local<Value>());
   ENTER_V8(isolate);
   i::Handle<i::JSObject> self_obj = Utils::OpenHandle(this);
   i::Handle<i::String> key_obj = Utils::OpenHandle(*key);
   i::PrototypeIterator iter(isolate, self_obj);
   if (iter.IsAtEnd()) return Local<Value>();
   i::LookupIterator it(i::PrototypeIterator::GetCurrent(iter), key_obj,
                        i::LookupIterator::CHECK_DERIVED_PROPERTY);
   return GetPropertyByLookup(&it);
 }
 
 
 Local<Value> v8::Object::GetRealNamedProperty(Handle<String> key) {
   i::Isolate* isolate = Utils::OpenHandle(this)->GetIsolate();
   ON_BAILOUT(isolate, "v8::Object::GetRealNamedProperty()",
              return Local<Value>());
   ENTER_V8(isolate);
   i::Handle<i::JSObject> self_obj = Utils::OpenHandle(this);
   i::Handle<i::String> key_obj = Utils::OpenHandle(*key);
-  i::LookupIterator it(self_obj, key_obj,
-                       i::LookupIterator::CHECK_DERIVED_PROPERTY);
+  i::LookupIterator it(self_obj, key_obj, i::LookupIterator::CHECK_PROPERTY);
   return GetPropertyByLookup(&it);
 }
 
 
 // Turns on access checks by copying the map and setting the check flag.
 // Because the object gets a new map, existing inline cache caching
 // the old map of this object will fail.
 void v8::Object::TurnOnAccessCheck() {
   i::Isolate* isolate = Utils::OpenHandle(this)->GetIsolate();
   ON_BAILOUT(isolate, "v8::Object::TurnOnAccessCheck()", return);
@@ skipping 4040 matching lines @@
   Isolate* isolate = reinterpret_cast<Isolate*>(info.GetIsolate());
   Address callback_address =
       reinterpret_cast<Address>(reinterpret_cast<intptr_t>(callback));
   VMState<EXTERNAL> state(isolate);
   ExternalCallbackScope call_scope(isolate, callback_address);
   callback(info);
 }
 
 
 } }  // namespace v8::internal