[runtime-object]: part fix element key list on global object

test/cctest/test-global-object.cc

 // Copyright 2013 the V8 project authors. All rights reserved.
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 //
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+#include "src/api.h"
 #include "src/v8.h"
+#include "test/cctest/cctest.h"
 
-#include "test/cctest/cctest.h"
+using ::v8::Array;
+using ::v8::Context;
+using ::v8::Local;
+using ::v8::Value;
 
 // This test fails if properties on the prototype of the global object appear
 // as declared globals.
 TEST(StrictUndeclaredGlobalVariable) {
   v8::HandleScope scope(CcTest::isolate());
   v8::Local<v8::String> var_name = v8_str("x");
   LocalContext context;
   v8::TryCatch try_catch(CcTest::isolate());
   v8::Local<v8::Script> script = v8_compile("\"use strict\"; x = 42;");
   v8::Handle<v8::Object> proto = v8::Object::New(CcTest::isolate());
   v8::Handle<v8::Object> global =
       context->Global()->GetPrototype().As<v8::Object>();
   proto->Set(var_name, v8_num(100));
   global->SetPrototype(proto);
   script->Run();
   CHECK(try_catch.HasCaught());
   v8::String::Utf8Value exception(try_catch.Exception());
   CHECK_EQ(0, strcmp("ReferenceError: x is not defined", *exception));
 }
+
+
+TEST(KeysGlobalObject_Regress2764) {
+  LocalContext env1;
+  v8::HandleScope scope(env1->GetIsolate());
+
+  // Create second environment.
+  v8::Handle<Context> env2 = Context::New(env1->GetIsolate());
+
+  Local<Value> token = v8_str("foo");
+
+  // Set same security token for env1 and env2.
+  env1->SetSecurityToken(token);
+  env2->SetSecurityToken(token);
+
+  // Create a reference to env2 global from env1 global.
+  env1->Global()->Set(v8_str("global2"), env2->Global());
+  // Set some global variables in global2
+  env2->Global()->Set(v8_str("a"), v8_str("a"));
+  env2->Global()->Set(v8_str("42"), v8_str("42"));
+
+  // List all entries from global2.
+  Local<Array> result;
+  result = Local<Array>::Cast(CompileRun("Object.keys(global2)"));
+  CHECK_EQ(2u, result->Length());
+  CHECK(v8_str("42")->Equals(result->Get(0)));
+  CHECK(v8_str("a")->Equals(result->Get(1)));
+
+  result =
+      Local<Array>::Cast(CompileRun("Object.getOwnPropertyNames(global2)"));
+  CHECK_LT(2u, result->Length());
+  // Check that all elements are in the property names
+  ExpectTrue("-1 < Object.getOwnPropertyNames(global2).indexOf('42')");
+  ExpectTrue("-1 < Object.getOwnPropertyNames(global2).indexOf('a')");
+
+  // Hold on to global from env2 and detach global from env2.
+  env2->DetachGlobal();
+
+  // List again all entries from the detached global2.
+  result = Local<Array>::Cast(CompileRun("Object.keys(global2)"));
+  CHECK_EQ(0u, result->Length());
+  result =
+      Local<Array>::Cast(CompileRun("Object.getOwnPropertyNames(global2)"));
+  CHECK_EQ(0u, result->Length());
+}