Keyed stores to super with numeric keys.

src/runtime/runtime-object.cc

 // Copyright 2014 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/arguments.h"
 #include "src/bootstrapper.h"
 #include "src/debug.h"
 #include "src/runtime/runtime.h"
@@ skipping 405 matching lines @@
   // LookupIterator.
   if (name->AsArrayIndex(&index)) {
     // Get attributes.
     Maybe<PropertyAttributes> maybe =
         JSReceiver::GetOwnElementAttribute(obj, index);
     if (!maybe.has_value) return MaybeHandle<Object>();
     attrs = maybe.value;
     if (attrs == ABSENT) return factory->undefined_value();
 
     // Get AccessorPair if present.
-    maybe_accessors = JSObject::GetOwnElementAccessorPair(obj, index);
+    Handle<Object> structure;
+    if (JSObject::GetOwnElementStructure(obj, index).ToHandle(&structure) &&
+        structure->IsAccessorPair()) {
+      maybe_accessors = Handle<AccessorPair>::cast(structure);
+    }
 
     // Get value if not an AccessorPair.
     if (maybe_accessors.is_null()) {
       ASSIGN_RETURN_ON_EXCEPTION(
           isolate, value, Runtime::GetElementOrCharAt(isolate, obj, index),
           Object);
     }
   } else {
     // Get attributes.
     LookupIterator it(obj, name, LookupIterator::HIDDEN);
@@ skipping 1196 matching lines @@
 
 RUNTIME_FUNCTION(RuntimeReference_ClassOf) {
   SealHandleScope shs(isolate);
   DCHECK(args.length() == 1);
   CONVERT_ARG_CHECKED(Object, obj, 0);
   if (!obj->IsJSReceiver()) return isolate->heap()->null_value();
   return JSReceiver::cast(obj)->class_name();
 }
 }
 }  // namespace v8::internal