Wrap external pointers more carefully.

test/cctest/test-api.cc

Index: test/cctest/test-api.cc
diff --git a/test/cctest/test-api.cc b/test/cctest/test-api.cc
index 9539973693b10cb0fd5e0e5546c41e762737ba7a..a70eeec493a5480aa607bb3b7494778037cf38cf 100644
--- a/test/cctest/test-api.cc
+++ b/test/cctest/test-api.cc
@@ -814,6 +814,39 @@ THREADED_TEST(FunctionTemplate) {
 }
 
 
+static v8::Handle<v8::Value> callback(const v8::Arguments& args) {
+  int* value = reinterpret_cast<int*>(v8::External::Unwrap(args.Data()));
+  CHECK_EQ(42, *value);
+  return v8::Integer::New(*value);
+}
+
+
+THREADED_TEST(PointerAsData) {
+  v8::HandleScope scope;
+  LocalContext env;
+
+  int* value = new int;
+  *value = 42;
+  v8::Handle<v8::Value> data = v8::External::Wrap(value);
+
+  v8::Handle<v8::Object> obj = v8::Object::New();
+  obj->Set(v8_str("func"),
+           v8::FunctionTemplate::New(callback, data)->GetFunction());
+  env->Global()->Set(v8_str("obj"), obj);
+
+  CHECK(CompileRun(
+        "function foo() {\n"
+        "  for (var i = 0; i < 13; i++) {\n"
+        "    if (42 != obj.func()) throw 'oops';\n"
+        "  }\n"
+        "  return true;\n"
+        "}\n"
+        "foo(), true")->BooleanValue());
+
+  delete value;
+}
+
+
 THREADED_TEST(FindInstanceInPrototypeChain) {
   v8::HandleScope scope;
   LocalContext env;