Expect access check in JSObject::DefineAccessor.

src/objects.cc

 // Copyright 2013 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/accessors.h"
 #include "src/allocation-site-scopes.h"
 #include "src/api.h"
 #include "src/arguments.h"
@@ skipping 6129 matching lines @@
   if (is_element) {
     DefineElementAccessor(object, index, getter, setter, attributes);
   } else {
     DCHECK(getter->IsSpecFunction() || getter->IsUndefined() ||
            getter->IsNull());
     DCHECK(setter->IsSpecFunction() || setter->IsUndefined() ||
            setter->IsNull());
     // At least one of the accessors needs to be a new value.
     DCHECK(!getter->IsNull() || !setter->IsNull());
     LookupIterator it(object, name, LookupIterator::OWN_SKIP_INTERCEPTOR);
-    CHECK_NE(LookupIterator::ACCESS_CHECK, it.state());
+    if (it.state() == LookupIterator::ACCESS_CHECK) {
+      // We already did an access check before. We do have access.
+      it.Next();
+    }
     if (!getter->IsNull()) {
       it.TransitionToAccessorProperty(ACCESSOR_GETTER, getter, attributes);
     }
     if (!setter->IsNull()) {
       it.TransitionToAccessorProperty(ACCESSOR_SETTER, setter, attributes);
     }
   }
 
   if (is_observed) {
     const char* type = preexists ? "reconfigure" : "add";
@@ skipping 10237 matching lines @@
 #define ERROR_MESSAGES_TEXTS(C, T) T,
   static const char* error_messages_[] = {
       ERROR_MESSAGES_LIST(ERROR_MESSAGES_TEXTS)
   };
 #undef ERROR_MESSAGES_TEXTS
   return error_messages_[reason];
 }
 
 
 } }  // namespace v8::internal