[runtime] Skip feedback vector configuration.

src/runtime/runtime-scopes.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/runtime/runtime-utils.h"
 
 #include <memory>
 
 #include "src/accessors.h"
 #include "src/arguments.h"
@@ skipping 97 matching lines @@
   }
 
   if (is_function_declaration) {
     it.Restart();
   }
 
   // Define or redefine own property.
   RETURN_FAILURE_ON_EXCEPTION(
       isolate, JSObject::DefineOwnPropertyIgnoreAttributes(&it, value, attr));
 
-  if (!feedback_vector.is_null()) {
+  if (!feedback_vector.is_null() &&
+      it.state() != LookupIterator::State::INTERCEPTOR) {
     DCHECK_EQ(*global, *it.GetHolder<Object>());
     // Preinitialize the feedback slot if the global object does not have
     // named interceptor or the interceptor is not masking.
     if (!global->HasNamedInterceptor() ||
         global->GetNamedInterceptor()->non_masking()) {
       LoadGlobalICNexus nexus(feedback_vector, slot);
       nexus.ConfigurePropertyCellMode(it.GetPropertyCell());
     }
   }
   return isolate->heap()->undefined_value();
@@ skipping 849 matching lines @@
 RUNTIME_FUNCTION(Runtime_StoreLookupSlot_Strict) {
   HandleScope scope(isolate);
   DCHECK_EQ(2, args.length());
   CONVERT_ARG_HANDLE_CHECKED(String, name, 0);
   CONVERT_ARG_HANDLE_CHECKED(Object, value, 1);
   RETURN_RESULT_OR_FAILURE(isolate, StoreLookupSlot(name, value, STRICT));
 }
 
 }  // namespace internal
 }  // namespace v8