Use GetProperty for getting elements.

test/cctest/test-api.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 7415 matching lines @@
   v8::Handle<String> str = v8_str("42");
   v8::Handle<v8::Uint32> index = str->ToArrayIndex();
   CHECK(!index.IsEmpty());
   CHECK_EQ(42.0, index->Uint32Value());
   str = v8_str("42asdf");
   index = str->ToArrayIndex();
   CHECK(index.IsEmpty());
   str = v8_str("-42");
   index = str->ToArrayIndex();
   CHECK(index.IsEmpty());
-  str = v8_str("4294967295");
+  str = v8_str("4294967294");
   index = str->ToArrayIndex();
   CHECK(!index.IsEmpty());
-  CHECK_EQ(4294967295.0, index->Uint32Value());
+  CHECK_EQ(4294967294.0, index->Uint32Value());
   v8::Handle<v8::Number> num = v8::Number::New(isolate, 1);
   index = num->ToArrayIndex();
   CHECK(!index.IsEmpty());
   CHECK_EQ(1.0, index->Uint32Value());
   num = v8::Number::New(isolate, -1);
   index = num->ToArrayIndex();
   CHECK(index.IsEmpty());
   v8::Handle<v8::Object> obj = v8::Object::New(isolate);
   index = obj->ToArrayIndex();
   CHECK(index.IsEmpty());
@@ skipping 13967 matching lines @@
   CHECK_EQ(2, set->Size());
 
   v8::Local<v8::Array> keys = set->AsArray();
   CHECK_EQ(2, keys->Length());
   CHECK_EQ(1, keys->Get(0).As<v8::Int32>()->Value());
   CHECK_EQ(2, keys->Get(1).As<v8::Int32>()->Value());
 
   set = v8::Set::FromArray(env.local(), keys).ToLocalChecked();
   CHECK_EQ(2, set->Size());
 }