Merge changes up to V8 version 2.1.3 into the partial snapshots

test/cctest/test-api.cc

 // Copyright 2007-2009 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 246 matching lines @@
   CHECK(foo_before->IsUndefined());
   Local<String> bar_str = v8_str("bar");
   obj->Set(v8_str("foo"), bar_str);
   Local<Value> foo_after = obj->Get(v8_str("foo"));
   CHECK(!foo_after->IsUndefined());
   CHECK(foo_after->IsString());
   CHECK_EQ(bar_str, foo_after);
 }
 
 
+THREADED_TEST(AccessElement) {
+  v8::HandleScope scope;
+  LocalContext env;
+  Local<v8::Object> obj = v8::Object::New();
+  Local<Value> before = obj->Get(1);
+  CHECK(before->IsUndefined());
+  Local<String> bar_str = v8_str("bar");
+  obj->Set(1, bar_str);
+  Local<Value> after = obj->Get(1);
+  CHECK(!after->IsUndefined());
+  CHECK(after->IsString());
+  CHECK_EQ(bar_str, after);
+
+  Local<v8::Array> value = CompileRun("[\"a\", \"b\"]").As<v8::Array>();
+  CHECK_EQ(v8_str("a"), value->Get(0));
+  CHECK_EQ(v8_str("b"), value->Get(1));
+}
+
+
 THREADED_TEST(Script) {
   v8::HandleScope scope;
   LocalContext env;
   const char* c_source = "1 + 2 + 3";
   Local<String> source = String::New(c_source);
   Local<Script> script = Script::Compile(source);
   CHECK_EQ(6, script->Run()->Int32Value());
 }
 
 
@@ skipping 970 matching lines @@
     const v8::Arguments& args) {
   ApiTestFuzzer::Fuzz();
   int depth = args.This()->Get(v8_str("depth"))->Int32Value();
   if (depth == kTargetRecursionDepth) {
     printf("[depth = %d]\n", depth);
     return v8::Undefined();
   }
   args.This()->Set(v8_str("depth"), v8::Integer::New(depth + 1));
   v8::Handle<Value> function =
       args.This()->Get(v8_str("callFunctionRecursively"));
-  return v8::Handle<Function>::Cast(function)->Call(args.This(), 0, NULL);
+  return function.As<Function>()->Call(args.This(), 0, NULL);
 }
 
 
 THREADED_TEST(DeepCrossLanguageRecursion) {
   v8::HandleScope scope;
   v8::Handle<v8::ObjectTemplate> global = ObjectTemplate::New();
   global->Set(v8_str("callScriptRecursively"),
               v8::FunctionTemplate::New(CallScriptRecursivelyCall));
   global->Set(v8_str("callFunctionRecursively"),
               v8::FunctionTemplate::New(CallFunctionRecursivelyCall));
@@ skipping 59 matching lines @@
   Local<v8::ObjectTemplate> instance_templ = templ->InstanceTemplate();
   instance_templ->SetInternalFieldCount(1);
   Local<v8::Object> obj = templ->GetFunction()->NewInstance();
   CHECK_EQ(1, obj->InternalFieldCount());
   CHECK(obj->GetInternalField(0)->IsUndefined());
   obj->SetInternalField(0, v8_num(17));
   CHECK_EQ(17, obj->GetInternalField(0)->Int32Value());
 }
 
 
+THREADED_TEST(GlobalObjectInternalFields) {
+  v8::HandleScope scope;
+  Local<v8::ObjectTemplate> global_template = v8::ObjectTemplate::New();
+  global_template->SetInternalFieldCount(1);
+  LocalContext env(NULL, global_template);
+  v8::Handle<v8::Object> global_proxy = env->Global();
+  v8::Handle<v8::Object> global = global_proxy->GetPrototype().As<v8::Object>();
+  CHECK_EQ(1, global->InternalFieldCount());
+  CHECK(global->GetInternalField(0)->IsUndefined());
+  global->SetInternalField(0, v8_num(17));
+  CHECK_EQ(17, global->GetInternalField(0)->Int32Value());
+}
+
+
 THREADED_TEST(InternalFieldsNativePointers) {
   v8::HandleScope scope;
   LocalContext env;
 
   Local<v8::FunctionTemplate> templ = v8::FunctionTemplate::New();
   Local<v8::ObjectTemplate> instance_templ = templ->InstanceTemplate();
   instance_templ->SetInternalFieldCount(1);
   Local<v8::Object> obj = templ->GetFunction()->NewInstance();
   CHECK_EQ(1, obj->InternalFieldCount());
   CHECK(obj->GetPointerFromInternalField(0) == NULL);
@@ skipping 160 matching lines @@
 }
 
 
 THREADED_TEST(External) {
   v8::HandleScope scope;
   int x = 3;
   Local<v8::External> ext = v8::External::New(&x);
   LocalContext env;
   env->Global()->Set(v8_str("ext"), ext);
   Local<Value> reext_obj = Script::Compile(v8_str("this.ext"))->Run();
-  v8::Handle<v8::External> reext = v8::Handle<v8::External>::Cast(reext_obj);
+  v8::Handle<v8::External> reext = reext_obj.As<v8::External>();
   int* ptr = static_cast<int*>(reext->Value());
   CHECK_EQ(x, 3);
   *ptr = 10;
   CHECK_EQ(x, 10);
 
   // Make sure unaligned pointers are wrapped properly.
   char* data = i::StrDup("0123456789");
   Local<v8::Value> zero = v8::External::Wrap(&data[0]);
   Local<v8::Value> one = v8::External::Wrap(&data[1]);
   Local<v8::Value> two = v8::External::Wrap(&data[2]);
@@ skipping 111 matching lines @@
   Script::Compile(v8_str("delete dont_delete"))->Run();
   CHECK_EQ(13, context->Global()->Get(prop)->Int32Value());
 }
 
 
 THREADED_TEST(Array) {
   v8::HandleScope scope;
   LocalContext context;
   Local<v8::Array> array = v8::Array::New();
   CHECK_EQ(0, array->Length());
-  CHECK(array->Get(v8::Integer::New(0))->IsUndefined());
+  CHECK(array->Get(0)->IsUndefined());
   CHECK(!array->Has(0));
-  CHECK(array->Get(v8::Integer::New(100))->IsUndefined());
+  CHECK(array->Get(100)->IsUndefined());
   CHECK(!array->Has(100));
-  array->Set(v8::Integer::New(2), v8_num(7));
+  array->Set(2, v8_num(7));
   CHECK_EQ(3, array->Length());
   CHECK(!array->Has(0));
   CHECK(!array->Has(1));
   CHECK(array->Has(2));
-  CHECK_EQ(7, array->Get(v8::Integer::New(2))->Int32Value());
+  CHECK_EQ(7, array->Get(2)->Int32Value());
   Local<Value> obj = Script::Compile(v8_str("[1, 2, 3]"))->Run();
-  Local<v8::Array> arr = Local<v8::Array>::Cast(obj);
+  Local<v8::Array> arr = obj.As<v8::Array>();
   CHECK_EQ(3, arr->Length());
-  CHECK_EQ(1, arr->Get(v8::Integer::New(0))->Int32Value());
-  CHECK_EQ(2, arr->Get(v8::Integer::New(1))->Int32Value());
-  CHECK_EQ(3, arr->Get(v8::Integer::New(2))->Int32Value());
+  CHECK_EQ(1, arr->Get(0)->Int32Value());
+  CHECK_EQ(2, arr->Get(1)->Int32Value());
+  CHECK_EQ(3, arr->Get(2)->Int32Value());
 }
 
 
 v8::Handle<Value> HandleF(const v8::Arguments& args) {
   v8::HandleScope scope;
   ApiTestFuzzer::Fuzz();
   Local<v8::Array> result = v8::Array::New(args.Length());
   for (int i = 0; i < args.Length(); i++)
-    result->Set(v8::Integer::New(i), args[i]);
+    result->Set(i, args[i]);
   return scope.Close(result);
 }
 
 
 THREADED_TEST(Vector) {
   v8::HandleScope scope;
   Local<ObjectTemplate> global = ObjectTemplate::New();
   global->Set(v8_str("f"), v8::FunctionTemplate::New(HandleF));
   LocalContext context(0, global);
 
   const char* fun = "f()";
-  Local<v8::Array> a0 =
-      Local<v8::Array>::Cast(Script::Compile(String::New(fun))->Run());
+  Local<v8::Array> a0 = CompileRun(fun).As<v8::Array>();
   CHECK_EQ(0, a0->Length());
 
   const char* fun2 = "f(11)";
-  Local<v8::Array> a1 =
-      Local<v8::Array>::Cast(Script::Compile(String::New(fun2))->Run());
+  Local<v8::Array> a1 = CompileRun(fun2).As<v8::Array>();
   CHECK_EQ(1, a1->Length());
-  CHECK_EQ(11, a1->Get(v8::Integer::New(0))->Int32Value());
+  CHECK_EQ(11, a1->Get(0)->Int32Value());
 
   const char* fun3 = "f(12, 13)";
-  Local<v8::Array> a2 =
-      Local<v8::Array>::Cast(Script::Compile(String::New(fun3))->Run());
+  Local<v8::Array> a2 = CompileRun(fun3).As<v8::Array>();
   CHECK_EQ(2, a2->Length());
-  CHECK_EQ(12, a2->Get(v8::Integer::New(0))->Int32Value());
-  CHECK_EQ(13, a2->Get(v8::Integer::New(1))->Int32Value());
+  CHECK_EQ(12, a2->Get(0)->Int32Value());
+  CHECK_EQ(13, a2->Get(1)->Int32Value());
 
   const char* fun4 = "f(14, 15, 16)";
-  Local<v8::Array> a3 =
-      Local<v8::Array>::Cast(Script::Compile(String::New(fun4))->Run());
+  Local<v8::Array> a3 = CompileRun(fun4).As<v8::Array>();
   CHECK_EQ(3, a3->Length());
-  CHECK_EQ(14, a3->Get(v8::Integer::New(0))->Int32Value());
-  CHECK_EQ(15, a3->Get(v8::Integer::New(1))->Int32Value());
-  CHECK_EQ(16, a3->Get(v8::Integer::New(2))->Int32Value());
+  CHECK_EQ(14, a3->Get(0)->Int32Value());
+  CHECK_EQ(15, a3->Get(1)->Int32Value());
+  CHECK_EQ(16, a3->Get(2)->Int32Value());
 
   const char* fun5 = "f(17, 18, 19, 20)";
-  Local<v8::Array> a4 =
-      Local<v8::Array>::Cast(Script::Compile(String::New(fun5))->Run());
+  Local<v8::Array> a4 = CompileRun(fun5).As<v8::Array>();
   CHECK_EQ(4, a4->Length());
-  CHECK_EQ(17, a4->Get(v8::Integer::New(0))->Int32Value());
-  CHECK_EQ(18, a4->Get(v8::Integer::New(1))->Int32Value());
-  CHECK_EQ(19, a4->Get(v8::Integer::New(2))->Int32Value());
-  CHECK_EQ(20, a4->Get(v8::Integer::New(3))->Int32Value());
+  CHECK_EQ(17, a4->Get(0)->Int32Value());
+  CHECK_EQ(18, a4->Get(1)->Int32Value());
+  CHECK_EQ(19, a4->Get(2)->Int32Value());
+  CHECK_EQ(20, a4->Get(3)->Int32Value());
 }
 
 
 THREADED_TEST(FunctionCall) {
   v8::HandleScope scope;
   LocalContext context;
   CompileRun(
     "function Foo() {"
     "  var result = [];"
     "  for (var i = 0; i < arguments.length; i++) {"
@@ skipping 197 matching lines @@
 
 
 static void CheckUncle(v8::TryCatch* try_catch) {
   CHECK(try_catch->HasCaught());
   String::AsciiValue str_value(try_catch->Exception());
   CHECK_EQ(*str_value, "uncle?");
   try_catch->Reset();
 }
 
 
+THREADED_TEST(ConversionNumber) {
+  v8::HandleScope scope;
+  LocalContext env;
+  // Very large number.
+  CompileRun("var obj = Math.pow(2,32) * 1237;");
+  Local<Value> obj = env->Global()->Get(v8_str("obj"));
+  CHECK_EQ(5312874545152.0, obj->ToNumber()->Value());
+  CHECK_EQ(0, obj->ToInt32()->Value());
+  CHECK(0u == obj->ToUint32()->Value());  // NOLINT - no CHECK_EQ for unsigned.
+  // Large number.
+  CompileRun("var obj = -1234567890123;");
+  obj = env->Global()->Get(v8_str("obj"));
+  CHECK_EQ(-1234567890123.0, obj->ToNumber()->Value());
+  CHECK_EQ(-1912276171, obj->ToInt32()->Value());
+  CHECK(2382691125u == obj->ToUint32()->Value());  // NOLINT
+  // Small positive integer.
+  CompileRun("var obj = 42;");
+  obj = env->Global()->Get(v8_str("obj"));
+  CHECK_EQ(42.0, obj->ToNumber()->Value());
+  CHECK_EQ(42, obj->ToInt32()->Value());
+  CHECK(42u == obj->ToUint32()->Value());  // NOLINT
+  // Negative integer.
+  CompileRun("var obj = -37;");
+  obj = env->Global()->Get(v8_str("obj"));
+  CHECK_EQ(-37.0, obj->ToNumber()->Value());
+  CHECK_EQ(-37, obj->ToInt32()->Value());
+  CHECK(4294967259u == obj->ToUint32()->Value());  // NOLINT
+  // Positive non-int32 integer.
+  CompileRun("var obj = 0x81234567;");
+  obj = env->Global()->Get(v8_str("obj"));
+  CHECK_EQ(2166572391.0, obj->ToNumber()->Value());
+  CHECK_EQ(-2128394905, obj->ToInt32()->Value());
+  CHECK(2166572391u == obj->ToUint32()->Value());  // NOLINT
+  // Fraction.
+  CompileRun("var obj = 42.3;");
+  obj = env->Global()->Get(v8_str("obj"));
+  CHECK_EQ(42.3, obj->ToNumber()->Value());
+  CHECK_EQ(42, obj->ToInt32()->Value());
+  CHECK(42u == obj->ToUint32()->Value());  // NOLINT
+  // Large negative fraction.
+  CompileRun("var obj = -5726623061.75;");
+  obj = env->Global()->Get(v8_str("obj"));
+  CHECK_EQ(-5726623061.75, obj->ToNumber()->Value());
+  CHECK_EQ(-1431655765, obj->ToInt32()->Value());
+  CHECK(2863311531u == obj->ToUint32()->Value());  // NOLINT
+}
+
+
+THREADED_TEST(isNumberType) {
+  v8::HandleScope scope;
+  LocalContext env;
+  // Very large number.
+  CompileRun("var obj = Math.pow(2,32) * 1237;");
+  Local<Value> obj = env->Global()->Get(v8_str("obj"));
+  CHECK(!obj->IsInt32());
+  CHECK(!obj->IsUint32());
+  // Large negative number.
+  CompileRun("var obj = -1234567890123;");
+  obj = env->Global()->Get(v8_str("obj"));
+  CHECK(!obj->IsInt32());
+  CHECK(!obj->IsUint32());
+  // Small positive integer.
+  CompileRun("var obj = 42;");
+  obj = env->Global()->Get(v8_str("obj"));
+  CHECK(obj->IsInt32());
+  CHECK(obj->IsUint32());
+  // Negative integer.
+  CompileRun("var obj = -37;");
+  obj = env->Global()->Get(v8_str("obj"));
+  CHECK(obj->IsInt32());
+  CHECK(!obj->IsUint32());
+  // Positive non-int32 integer.
+  CompileRun("var obj = 0x81234567;");
+  obj = env->Global()->Get(v8_str("obj"));
+  CHECK(!obj->IsInt32());
+  CHECK(obj->IsUint32());
+  // Fraction.
+  CompileRun("var obj = 42.3;");
+  obj = env->Global()->Get(v8_str("obj"));
+  CHECK(!obj->IsInt32());
+  CHECK(!obj->IsUint32());
+  // Large negative fraction.
+  CompileRun("var obj = -5726623061.75;");
+  obj = env->Global()->Get(v8_str("obj"));
+  CHECK(!obj->IsInt32());
+  CHECK(!obj->IsUint32());
+}
+
+
 THREADED_TEST(ConversionException) {
   v8::HandleScope scope;
   LocalContext env;
   CompileRun(
     "function TestClass() { };"
     "TestClass.prototype.toString = function () { throw 'uncle?'; };"
     "var obj = new TestClass();");
   Local<Value> obj = env->Global()->Get(v8_str("obj"));
 
   v8::TryCatch try_catch;
@@ skipping 178 matching lines @@
     return v8::ThrowException(v8_str("FromC"));
   } else {
     Local<v8::Object> global = Context::GetCurrent()->Global();
     Local<Value> fun = global->Get(v8_str("JSThrowCountDown"));
     v8::Handle<Value> argv[] = { v8_num(count - 1),
                                  args[1],
                                  args[2],
                                  args[3] };
     if (count % cInterval == 0) {
       v8::TryCatch try_catch;
-      Local<Value> result =
-          v8::Handle<Function>::Cast(fun)->Call(global, 4, argv);
+      Local<Value> result = fun.As<Function>()->Call(global, 4, argv);
       int expected = args[3]->Int32Value();
       if (try_catch.HasCaught()) {
         CHECK_EQ(expected, count);
         CHECK(result.IsEmpty());
         CHECK(!i::Top::has_scheduled_exception());
       } else {
         CHECK_NE(expected, count);
       }
       return result;
     } else {
-      return v8::Handle<Function>::Cast(fun)->Call(global, 4, argv);
+      return fun.As<Function>()->Call(global, 4, argv);
     }
   }
 }
 
 
 v8::Handle<Value> JSCheck(const v8::Arguments& args) {
   ApiTestFuzzer::Fuzz();
   CHECK_EQ(3, args.Length());
   bool equality = args[0]->BooleanValue();
   int count = args[1]->Int32Value();
@@ skipping 369 matching lines @@
     Local<Value> result = script->Run();
     CHECK_EQ(result, v8_str("x"));
   }
 }
 
 
 static v8::Handle<Value> SetXOnPrototypeGetter(Local<String> property,
                                                const AccessorInfo& info) {
   // Set x on the prototype object and do not handle the get request.
   v8::Handle<v8::Value> proto = info.Holder()->GetPrototype();
-  v8::Handle<v8::Object>::Cast(proto)->Set(v8_str("x"), v8::Integer::New(23));
+  proto.As<v8::Object>()->Set(v8_str("x"), v8::Integer::New(23));
   return v8::Handle<Value>();
 }
 
 
 // This is a regression test for http://crbug.com/20104. Map
 // transitions should not interfere with post interceptor lookup.
 THREADED_TEST(NamedInterceptorMapTransitionRead) {
   v8::HandleScope scope;
   Local<v8::FunctionTemplate> function_template = v8::FunctionTemplate::New();
   Local<v8::ObjectTemplate> instance_template
@@ skipping 315 matching lines @@
 THREADED_TEST(FunctionPrototypeAcrossContexts) {
   // Make sure that functions created by cloning boilerplates cannot
   // communicate through their __proto__ field.
 
   v8::HandleScope scope;
 
   LocalContext env0;
   v8::Handle<v8::Object> global0 =
       env0->Global();
   v8::Handle<v8::Object> object0 =
-      v8::Handle<v8::Object>::Cast(global0->Get(v8_str("Object")));
+      global0->Get(v8_str("Object")).As<v8::Object>();
   v8::Handle<v8::Object> tostring0 =
-      v8::Handle<v8::Object>::Cast(object0->Get(v8_str("toString")));
+      object0->Get(v8_str("toString")).As<v8::Object>();
   v8::Handle<v8::Object> proto0 =
-      v8::Handle<v8::Object>::Cast(tostring0->Get(v8_str("__proto__")));
+      tostring0->Get(v8_str("__proto__")).As<v8::Object>();
   proto0->Set(v8_str("custom"), v8_num(1234));
 
   LocalContext env1;
   v8::Handle<v8::Object> global1 =
       env1->Global();
   v8::Handle<v8::Object> object1 =
-      v8::Handle<v8::Object>::Cast(global1->Get(v8_str("Object")));
+      global1->Get(v8_str("Object")).As<v8::Object>();
   v8::Handle<v8::Object> tostring1 =
-      v8::Handle<v8::Object>::Cast(object1->Get(v8_str("toString")));
+      object1->Get(v8_str("toString")).As<v8::Object>();
   v8::Handle<v8::Object> proto1 =
-      v8::Handle<v8::Object>::Cast(tostring1->Get(v8_str("__proto__")));
+      tostring1->Get(v8_str("__proto__")).As<v8::Object>();
   CHECK(!proto1->Has(v8_str("custom")));
 }
 
 
 THREADED_TEST(Regress892105) {
   // Make sure that object and array literals created by cloning
   // boilerplates cannot communicate through their __proto__
   // field. This is rather difficult to check, but we try to add stuff
   // to Object.prototype and Array.prototype and create a new
   // environment. This should succeed.
@@ skipping 601 matching lines @@
   i::Heap::CollectAllGarbage(false);
   return v8::Undefined();
 }
 
 
 THREADED_TEST(Arguments) {
   v8::HandleScope scope;
   v8::Handle<v8::ObjectTemplate> global = ObjectTemplate::New();
   global->Set(v8_str("f"), v8::FunctionTemplate::New(ArgumentsTestCallback));
   LocalContext context(NULL, global);
-  args_fun = v8::Handle<Function>::Cast(context->Global()->Get(v8_str("f")));
+  args_fun = context->Global()->Get(v8_str("f")).As<Function>();
   v8_compile("f(1, 2, 3)")->Run();
 }
 
 
 static v8::Handle<Value> NoBlockGetterX(Local<String> name,
                                         const AccessorInfo&) {
   return v8::Handle<Value>();
 }
 
 
@@ skipping 317 matching lines @@
 
 
 THREADED_TEST(ErrorConstruction) {
   v8::HandleScope scope;
   LocalContext context;
 
   v8::Handle<String> foo = v8_str("foo");
   v8::Handle<String> message = v8_str("message");
   v8::Handle<Value> range_error = v8::Exception::RangeError(foo);
   CHECK(range_error->IsObject());
-  v8::Handle<v8::Object> range_obj(v8::Handle<v8::Object>::Cast(range_error));
-  CHECK(v8::Handle<v8::Object>::Cast(range_error)->Get(message)->Equals(foo));
+  v8::Handle<v8::Object> range_obj = range_error.As<v8::Object>();
+  CHECK(range_error.As<v8::Object>()->Get(message)->Equals(foo));
   v8::Handle<Value> reference_error = v8::Exception::ReferenceError(foo);
   CHECK(reference_error->IsObject());
-  CHECK(
-      v8::Handle<v8::Object>::Cast(reference_error)->Get(message)->Equals(foo));
+  CHECK(reference_error.As<v8::Object>()->Get(message)->Equals(foo));
   v8::Handle<Value> syntax_error = v8::Exception::SyntaxError(foo);
   CHECK(syntax_error->IsObject());
-  CHECK(v8::Handle<v8::Object>::Cast(syntax_error)->Get(message)->Equals(foo));
+  CHECK(syntax_error.As<v8::Object>()->Get(message)->Equals(foo));
   v8::Handle<Value> type_error = v8::Exception::TypeError(foo);
   CHECK(type_error->IsObject());
-  CHECK(v8::Handle<v8::Object>::Cast(type_error)->Get(message)->Equals(foo));
+  CHECK(type_error.As<v8::Object>()->Get(message)->Equals(foo));
   v8::Handle<Value> error = v8::Exception::Error(foo);
   CHECK(error->IsObject());
-  CHECK(v8::Handle<v8::Object>::Cast(error)->Get(message)->Equals(foo));
+  CHECK(error.As<v8::Object>()->Get(message)->Equals(foo));
 }
 
 
 static v8::Handle<Value> YGetter(Local<String> name, const AccessorInfo& info) {
   ApiTestFuzzer::Fuzz();
   return v8_num(10);
 }
 
 
 static void YSetter(Local<String> name,
@@ skipping 903 matching lines @@
 static bool NamedAccessFlatten(Local<v8::Object> global,
                                Local<Value> name,
                                v8::AccessType type,
                                Local<Value> data) {
   char buf[100];
   int len;
 
   CHECK(name->IsString());
 
   memset(buf, 0x1, sizeof(buf));
-  len = Local<String>::Cast(name)->WriteAscii(buf);
+  len = name.As<String>()->WriteAscii(buf);
   CHECK_EQ(4, len);
 
   uint16_t buf2[100];
 
   memset(buf, 0x1, sizeof(buf));
-  len = Local<String>::Cast(name)->Write(buf2);
+  len = name.As<String>()->Write(buf2);
   CHECK_EQ(4, len);
 
   return true;
 }
 
 
 static bool IndexedAccessFlatten(Local<v8::Object> global,
                                  uint32_t key,
                                  v8::AccessType type,
                                  Local<Value> data) {
@@ skipping 328 matching lines @@
   CHECK_EQ(0, o0->Get(v8_str("x"))->Int32Value());
   CHECK_EQ(1, o0->Get(v8_str("y"))->Int32Value());
   CHECK_EQ(2, o0->Get(v8_str("z"))->Int32Value());
   CHECK_EQ(3, o0->Get(v8_str("u"))->Int32Value());
 
   // Getting the prototype of o0 should get the first visible one
   // which is o3.  Therefore, z should not be defined on the prototype
   // object.
   Local<Value> proto = o0->Get(v8_str("__proto__"));
   CHECK(proto->IsObject());
-  CHECK(Local<v8::Object>::Cast(proto)->Get(v8_str("z"))->IsUndefined());
+  CHECK(proto.As<v8::Object>()->Get(v8_str("z"))->IsUndefined());
 }
 
 
 THREADED_TEST(SetPrototype) {
   v8::HandleScope handle_scope;
   LocalContext context;
 
   Local<v8::FunctionTemplate> t0 = v8::FunctionTemplate::New();
   t0->InstanceTemplate()->Set(v8_str("x"), v8_num(0));
   Local<v8::FunctionTemplate> t1 = v8::FunctionTemplate::New();
@@ skipping 23 matching lines @@
   CHECK_EQ(0, o0->Get(v8_str("x"))->Int32Value());
   CHECK_EQ(1, o0->Get(v8_str("y"))->Int32Value());
   CHECK_EQ(2, o0->Get(v8_str("z"))->Int32Value());
   CHECK_EQ(3, o0->Get(v8_str("u"))->Int32Value());
 
   // Getting the prototype of o0 should get the first visible one
   // which is o3.  Therefore, z should not be defined on the prototype
   // object.
   Local<Value> proto = o0->Get(v8_str("__proto__"));
   CHECK(proto->IsObject());
-  CHECK_EQ(v8::Handle<v8::Object>::Cast(proto), o3);
+  CHECK_EQ(proto.As<v8::Object>(), o3);
 
   // However, Object::GetPrototype ignores hidden prototype.
   Local<Value> proto0 = o0->GetPrototype();
   CHECK(proto0->IsObject());
-  CHECK_EQ(v8::Handle<v8::Object>::Cast(proto0), o1);
+  CHECK_EQ(proto0.As<v8::Object>(), o1);
 
   Local<Value> proto1 = o1->GetPrototype();
   CHECK(proto1->IsObject());
-  CHECK_EQ(v8::Handle<v8::Object>::Cast(proto1), o2);
+  CHECK_EQ(proto1.As<v8::Object>(), o2);
 
   Local<Value> proto2 = o2->GetPrototype();
   CHECK(proto2->IsObject());
-  CHECK_EQ(v8::Handle<v8::Object>::Cast(proto2), o3);
+  CHECK_EQ(proto2.As<v8::Object>(), o3);
 }
 
 
 THREADED_TEST(SetPrototypeThrows) {
   v8::HandleScope handle_scope;
   LocalContext context;
 
   Local<v8::FunctionTemplate> t = v8::FunctionTemplate::New();
 
   Local<v8::Object> o0 = t->GetFunction()->NewInstance();
@@ skipping 1220 matching lines @@
       "  if (i == 50) {"
       "    saved_result = result;"
       "    o.method = function(x) { return x - 1 };"
       "  }"
       "}");
   CHECK_EQ(40, context->Global()->Get(v8_str("result"))->Int32Value());
   CHECK_EQ(42, context->Global()->Get(v8_str("saved_result"))->Int32Value());
   CHECK_GE(interceptor_call_count, 50);
 }
 
+THREADED_TEST(InterceptorCallICFastApi_SimpleSignature_Miss3) {
+  int interceptor_call_count = 0;
+  v8::HandleScope scope;
+  v8::Handle<v8::FunctionTemplate> fun_templ = v8::FunctionTemplate::New();
+  v8::Handle<v8::FunctionTemplate> method_templ =
+      v8::FunctionTemplate::New(FastApiCallback_SimpleSignature,
+                                v8_str("method_data"),
+                                v8::Signature::New(fun_templ));
+  v8::Handle<v8::ObjectTemplate> proto_templ = fun_templ->PrototypeTemplate();
+  proto_templ->Set(v8_str("method"), method_templ);
+  v8::Handle<v8::ObjectTemplate> templ = fun_templ->InstanceTemplate();
+  templ->SetNamedPropertyHandler(InterceptorCallICFastApi,
+                                 NULL, NULL, NULL, NULL,
+                                 v8::External::Wrap(&interceptor_call_count));
+  LocalContext context;
+  v8::Handle<v8::Function> fun = fun_templ->GetFunction();
+  GenerateSomeGarbage();
+  context->Global()->Set(v8_str("o"), fun->NewInstance());
+  v8::TryCatch try_catch;
+  v8::Handle<Value> value = CompileRun(
+      "o.foo = 17;"
+      "var receiver = {};"
+      "receiver.__proto__ = o;"
+      "var result = 0;"
+      "var saved_result = 0;"
+      "for (var i = 0; i < 100; i++) {"
+      "  result = receiver.method(41);"
+      "  if (i == 50) {"
+      "    saved_result = result;"
+      "    receiver = 333;"
+      "  }"
+      "}");
+  CHECK(try_catch.HasCaught());
+  CHECK_EQ(v8_str("TypeError: Object 333 has no method 'method'"),
+           try_catch.Exception()->ToString());
+  CHECK_EQ(42, context->Global()->Get(v8_str("saved_result"))->Int32Value());
+  CHECK_GE(interceptor_call_count, 50);
+}
+
 THREADED_TEST(InterceptorCallICFastApi_SimpleSignature_TypeError) {
   int interceptor_call_count = 0;
   v8::HandleScope scope;
   v8::Handle<v8::FunctionTemplate> fun_templ = v8::FunctionTemplate::New();
   v8::Handle<v8::FunctionTemplate> method_templ =
       v8::FunctionTemplate::New(FastApiCallback_SimpleSignature,
                                 v8_str("method_data"),
                                 v8::Signature::New(fun_templ));
   v8::Handle<v8::ObjectTemplate> proto_templ = fun_templ->PrototypeTemplate();
   proto_templ->Set(v8_str("method"), method_templ);
@@ skipping 68 matching lines @@
       "var receiver = {};"
       "receiver.__proto__ = o;"
       "var result = 0;"
       "for (var i = 0; i < 100; i++) {"
       "  result = receiver.method(41);"
       "}");
 
   CHECK_EQ(42, context->Global()->Get(v8_str("result"))->Int32Value());
 }
 
-THREADED_TEST(CallICFastApi_SimpleSignature_Miss) {
+THREADED_TEST(CallICFastApi_SimpleSignature_Miss1) {
   v8::HandleScope scope;
   v8::Handle<v8::FunctionTemplate> fun_templ = v8::FunctionTemplate::New();
   v8::Handle<v8::FunctionTemplate> method_templ =
       v8::FunctionTemplate::New(FastApiCallback_SimpleSignature,
                                 v8_str("method_data"),
                                 v8::Signature::New(fun_templ));
   v8::Handle<v8::ObjectTemplate> proto_templ = fun_templ->PrototypeTemplate();
   proto_templ->Set(v8_str("method"), method_templ);
   v8::Handle<v8::ObjectTemplate> templ = fun_templ->InstanceTemplate();
   LocalContext context;
@@ skipping 10 matching lines @@
       "  result = receiver.method(41);"
       "  if (i == 50) {"
       "    saved_result = result;"
       "    receiver = {method: function(x) { return x - 1 }};"
       "  }"
       "}");
   CHECK_EQ(40, context->Global()->Get(v8_str("result"))->Int32Value());
   CHECK_EQ(42, context->Global()->Get(v8_str("saved_result"))->Int32Value());
 }
 
+THREADED_TEST(CallICFastApi_SimpleSignature_Miss2) {
+  v8::HandleScope scope;
+  v8::Handle<v8::FunctionTemplate> fun_templ = v8::FunctionTemplate::New();
+  v8::Handle<v8::FunctionTemplate> method_templ =
+      v8::FunctionTemplate::New(FastApiCallback_SimpleSignature,
+                                v8_str("method_data"),
+                                v8::Signature::New(fun_templ));
+  v8::Handle<v8::ObjectTemplate> proto_templ = fun_templ->PrototypeTemplate();
+  proto_templ->Set(v8_str("method"), method_templ);
+  v8::Handle<v8::ObjectTemplate> templ = fun_templ->InstanceTemplate();
+  LocalContext context;
+  v8::Handle<v8::Function> fun = fun_templ->GetFunction();
+  GenerateSomeGarbage();
+  context->Global()->Set(v8_str("o"), fun->NewInstance());
+  v8::TryCatch try_catch;
+  v8::Handle<Value> value = CompileRun(
+      "o.foo = 17;"
+      "var receiver = {};"
+      "receiver.__proto__ = o;"
+      "var result = 0;"
+      "var saved_result = 0;"
+      "for (var i = 0; i < 100; i++) {"
+      "  result = receiver.method(41);"
+      "  if (i == 50) {"
+      "    saved_result = result;"
+      "    receiver = 333;"
+      "  }"
+      "}");
+  CHECK(try_catch.HasCaught());
+  CHECK_EQ(v8_str("TypeError: Object 333 has no method 'method'"),
+           try_catch.Exception()->ToString());
+  CHECK_EQ(42, context->Global()->Get(v8_str("saved_result"))->Int32Value());
+}
+
 
 static int interceptor_call_count = 0;
 
 static v8::Handle<Value> InterceptorICRefErrorGetter(Local<String> name,
                                                      const AccessorInfo& info) {
   ApiTestFuzzer::Fuzz();
   if (v8_str("x")->Equals(name) && interceptor_call_count++ < 20) {
     return call_ic_function2;
   }
   return v8::Handle<Value>();
@@ skipping 259 matching lines @@
   // ObjectProtoToString should not call replace toString function.
   value = instance->ObjectProtoToString();
   CHECK(value->IsString() && value->Equals(v8_str("[object MyClass]")));
 
   // Check global
   value = context->Global()->ObjectProtoToString();
   CHECK(value->IsString() && value->Equals(v8_str("[object global]")));
 
   // Check ordinary object
   Local<Value> object = v8_compile("new Object()")->Run();
-  value = Local<v8::Object>::Cast(object)->ObjectProtoToString();
+  value = object.As<v8::Object>()->ObjectProtoToString();
   CHECK(value->IsString() && value->Equals(v8_str("[object Object]")));
 }
 
 
 bool ApiTestFuzzer::fuzzing_ = false;
 v8::internal::Semaphore* ApiTestFuzzer::all_tests_done_=
   v8::internal::OS::CreateSemaphore(0);
 int ApiTestFuzzer::active_tests_;
 int ApiTestFuzzer::tests_being_run_;
 int ApiTestFuzzer::current_;
@@ skipping 599 matching lines @@
   v8::String::AsciiValue name(value);
   CHECK_EQ("asdf", *name);
 }
 
 
 THREADED_TEST(DateAccess) {
   v8::HandleScope scope;
   LocalContext context;
   v8::Handle<v8::Value> date = v8::Date::New(1224744689038.0);
   CHECK(date->IsDate());
-  CHECK_EQ(1224744689038.0, v8::Handle<v8::Date>::Cast(date)->NumberValue());
+  CHECK_EQ(1224744689038.0, date.As<v8::Date>()->NumberValue());
 }
 
 
 void CheckProperties(v8::Handle<v8::Value> val, int elmc, const char* elmv[]) {
-  v8::Handle<v8::Object> obj = v8::Handle<v8::Object>::Cast(val);
+  v8::Handle<v8::Object> obj = val.As<v8::Object>();
   v8::Handle<v8::Array> props = obj->GetPropertyNames();
   CHECK_EQ(elmc, props->Length());
   for (int i = 0; i < elmc; i++) {
     v8::String::Utf8Value elm(props->Get(v8::Integer::New(i)));
     CHECK_EQ(elmv[i], *elm);
   }
 }
 
 
 THREADED_TEST(PropertyEnumeration) {
   v8::HandleScope scope;
   LocalContext context;
   v8::Handle<v8::Value> obj = v8::Script::Compile(v8::String::New(
       "var result = [];"
       "result[0] = {};"
       "result[1] = {a: 1, b: 2};"
       "result[2] = [1, 2, 3];"
       "var proto = {x: 1, y: 2, z: 3};"
       "var x = { __proto__: proto, w: 0, z: 1 };"
       "result[3] = x;"
       "result;"))->Run();
-  v8::Handle<v8::Array> elms = v8::Handle<v8::Array>::Cast(obj);
+  v8::Handle<v8::Array> elms = obj.As<v8::Array>();
   CHECK_EQ(4, elms->Length());
   int elmc0 = 0;
   const char** elmv0 = NULL;
   CheckProperties(elms->Get(v8::Integer::New(0)), elmc0, elmv0);
   int elmc1 = 2;
   const char* elmv1[] = {"a", "b"};
   CheckProperties(elms->Get(v8::Integer::New(1)), elmc1, elmv1);
   int elmc2 = 3;
   const char* elmv2[] = {"0", "1", "2"};
   CheckProperties(elms->Get(v8::Integer::New(2)), elmc2, elmv2);
@@ skipping 501 matching lines @@
 
   const char* sample =
     "var rv = {};"      \
     "rv.alpha = 'hello';" \
     "rv.beta = 123;"     \
     "rv;";
 
   // Create an object, verify basics.
   Local<Value> val = CompileRun(sample);
   CHECK(val->IsObject());
-  Local<v8::Object> obj = Local<v8::Object>::Cast(val);
+  Local<v8::Object> obj = val.As<v8::Object>();
   obj->Set(v8_str("gamma"), v8_str("cloneme"));
 
   CHECK_EQ(v8_str("hello"), obj->Get(v8_str("alpha")));
   CHECK_EQ(v8::Integer::New(123), obj->Get(v8_str("beta")));
   CHECK_EQ(v8_str("cloneme"), obj->Get(v8_str("gamma")));
 
   // Clone it.
   Local<v8::Object> clone = obj->Clone();
   CHECK_EQ(v8_str("hello"), clone->Get(v8_str("alpha")));
   CHECK_EQ(v8::Integer::New(123), clone->Get(v8_str("beta")));
@@ skipping 1620 matching lines @@
 }
 
 
 static void SetterWhichSetsYOnThisTo23(Local<String> name,
                                        Local<Value> value,
                                        const AccessorInfo& info) {
   info.This()->Set(v8_str("y"), v8_num(23));
 }
 
 
-THREADED_TEST(SetterOnConstructorPrototype) {
+TEST(SetterOnConstructorPrototype) {
   v8::HandleScope scope;
   Local<ObjectTemplate> templ = ObjectTemplate::New();
   templ->SetAccessor(v8_str("x"),
                      GetterWhichReturns42,
                      SetterWhichSetsYOnThisTo23);
   LocalContext context;
   context->Global()->Set(v8_str("P"), templ->NewInstance());
   CompileRun("function C1() {"
              "  this.x = 23;"
              "};"
@@ skipping 61 matching lines @@
     CHECK_EQ(42, c1->Get(v8_str("y"))->Int32Value());
   }
 
   script = v8::Script::Compile(v8_str("new C2();"));
   for (int i = 0; i < 10; i++) {
     v8::Handle<v8::Object> c2 = v8::Handle<v8::Object>::Cast(script->Run());
     CHECK_EQ(23, c2->Get(v8_str("x"))->Int32Value());
     CHECK_EQ(42, c2->Get(v8_str("y"))->Int32Value());
   }
 }
+
+
+TEST(Bug618) {
+  const char* source = "function C1() {"
+                       "  this.x = 23;"
+                       "};"
+                       "C1.prototype = P;";
+
+  v8::HandleScope scope;
+  LocalContext context;
+  v8::Local<v8::Script> script;
+
+  // Use a simple object as prototype.
+  v8::Local<v8::Object> prototype = v8::Object::New();
+  prototype->Set(v8_str("y"), v8_num(42));
+  context->Global()->Set(v8_str("P"), prototype);
+
+  // This compile will add the code to the compilation cache.
+  CompileRun(source);
+
+  script = v8::Script::Compile(v8_str("new C1();"));
+  for (int i = 0; i < 10; i++) {
+    v8::Handle<v8::Object> c1 = v8::Handle<v8::Object>::Cast(script->Run());
+    CHECK_EQ(23, c1->Get(v8_str("x"))->Int32Value());
+    CHECK_EQ(42, c1->Get(v8_str("y"))->Int32Value());
+  }
+
+  // Use an API object with accessors as prototype.
+  Local<ObjectTemplate> templ = ObjectTemplate::New();
+  templ->SetAccessor(v8_str("x"),
+                     GetterWhichReturns42,
+                     SetterWhichSetsYOnThisTo23);
+  context->Global()->Set(v8_str("P"), templ->NewInstance());
+
+  // This compile will get the code from the compilation cache.
+  CompileRun(source);
+
+  script = v8::Script::Compile(v8_str("new C1();"));
+  for (int i = 0; i < 10; i++) {
+    v8::Handle<v8::Object> c1 = v8::Handle<v8::Object>::Cast(script->Run());
+    CHECK_EQ(42, c1->Get(v8_str("x"))->Int32Value());
+    CHECK_EQ(23, c1->Get(v8_str("y"))->Int32Value());
+  }
+}