Fix invalid access to layout descriptor in Map::CopyInitialMap()

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/objects.h"
 
 #include <cmath>
 #include <iomanip>
 #include <sstream>
 
@@ skipping 9018 matching lines @@
   Handle<Map> result = RawCopy(map, instance_size);
 
   // Please note instance_type and instance_size are set when allocated.
   result->SetInObjectProperties(in_object_properties);
   result->set_unused_property_fields(unused_property_fields);
 
   int number_of_own_descriptors = map->NumberOfOwnDescriptors();
   if (number_of_own_descriptors > 0) {
     // The copy will use the same descriptors array.
     result->UpdateDescriptors(map->instance_descriptors(),
-                              map->layout_descriptor());
+                              map->GetLayoutDescriptor());
     result->SetNumberOfOwnDescriptors(number_of_own_descriptors);
 
     DCHECK_EQ(result->NumberOfFields(),
               in_object_properties - unused_property_fields);
   }
 
   return result;
 }
 
 
@@ skipping 10268 matching lines @@
   if (cell->value() != *new_value) {
     cell->set_value(*new_value);
     Isolate* isolate = cell->GetIsolate();
     cell->dependent_code()->DeoptimizeDependentCodeGroup(
         isolate, DependentCode::kPropertyCellChangedGroup);
   }
 }
 
 }  // namespace internal
 }  // namespace v8