Improving error messages when adding properties to non JSObject receiver in

src/objects.h

 // Copyright 2012 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.
 
 #ifndef V8_OBJECTS_H_
 #define V8_OBJECTS_H_
 
 #include <iosfwd>
 
 #include "src/allocation.h"
@@ skipping 1214 matching lines @@
 
   MUST_USE_RESULT static MaybeHandle<Object> SetSuperProperty(
       LookupIterator* it, Handle<Object> value, LanguageMode language_mode,
       StoreFromKeyed store_mode);
 
   MUST_USE_RESULT static MaybeHandle<Object> ReadAbsentProperty(
       LookupIterator* it, LanguageMode language_mode);
   MUST_USE_RESULT static MaybeHandle<Object> ReadAbsentProperty(
       Isolate* isolate, Handle<Object> receiver, Handle<Object> name,
       LanguageMode language_mode);
+  MUST_USE_RESULT static MaybeHandle<Object> CannotCreateProperty(
+      LookupIterator* it, Handle<Object> value, LanguageMode language_mode);
+  MUST_USE_RESULT static MaybeHandle<Object> CannotCreateProperty(
+      Isolate* isolate, Handle<Object> receiver, Handle<Object> name,
+      Handle<Object> value, LanguageMode language_mode);
   MUST_USE_RESULT static MaybeHandle<Object> WriteToReadOnlyProperty(
       LookupIterator* it, Handle<Object> value, LanguageMode language_mode);
   MUST_USE_RESULT static MaybeHandle<Object> WriteToReadOnlyProperty(
       Isolate* isolate, Handle<Object> receiver, Handle<Object> name,
       Handle<Object> value, LanguageMode language_mode);
   MUST_USE_RESULT static MaybeHandle<Object> RedefineNonconfigurableProperty(
       Isolate* isolate, Handle<Object> name, Handle<Object> value,
       LanguageMode language_mode);
   MUST_USE_RESULT static MaybeHandle<Object> SetDataProperty(
       LookupIterator* it, Handle<Object> value);
@@ skipping 9417 matching lines @@
   Handle<FixedArray> keys_;
   Handle<OrderedHashSet> set_;
   int length_;
   DISALLOW_COPY_AND_ASSIGN(KeyAccumulator);
 };
 
 }  // NOLINT, false-positive due to second-order macros.
 }  // NOLINT, false-positive due to second-order macros.
 
 #endif  // V8_OBJECTS_H_