Use SetOwnElement when creating splice records in array length setter

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 <sstream>
 
 #include "src/v8.h"
 
 #include "src/accessors.h"
 #include "src/allocation-site-scopes.h"
@@ skipping 11789 matching lines @@
 
   uint32_t index = Min(old_length, new_length);
   uint32_t add_count = new_length > old_length ? new_length - old_length : 0;
   uint32_t delete_count = new_length < old_length ? old_length - new_length : 0;
   Handle<JSArray> deleted = isolate->factory()->NewJSArray(0);
   if (delete_count > 0) {
     for (int i = indices.length() - 1; i >= 0; i--) {
       // Skip deletions where the property was an accessor, leaving holes
       // in the array of old values.
       if (old_values[i]->IsTheHole()) continue;
-      JSObject::SetElement(
-          deleted, indices[i] - index, old_values[i], NONE, SLOPPY).Assert();
+      JSObject::SetOwnElement(deleted, indices[i] - index, old_values[i],
+                              SLOPPY).Assert();
     }
 
     SetProperty(deleted, isolate->factory()->length_string(),
                 isolate->factory()->NewNumberFromUint(delete_count),
                 STRICT).Assert();
   }
 
   RETURN_ON_EXCEPTION(
       isolate, EnqueueSpliceRecord(array, index, deleted, add_count), Object);
 
@@ skipping 5282 matching lines @@
   Handle<DependentCode> codes =
       DependentCode::Insert(handle(cell->dependent_code(), info->isolate()),
                             DependentCode::kPropertyCellChangedGroup,
                             info->object_wrapper());
   if (*codes != cell->dependent_code()) cell->set_dependent_code(*codes);
   info->dependencies(DependentCode::kPropertyCellChangedGroup)->Add(
       cell, info->zone());
 }
 
 } }  // namespace v8::internal