NanThrowError & iojs 1.5.1

binding.cc

#include <iostream>
#include <nan.h>

using namespace v8;

NAN_METHOD(Wut);

void
Init(Handle<Object> exports){
  exports->Set(
      NanNew<String>("wut")
    , NanNew<FunctionTemplate>(Wut)->GetFunction()
  );
}

NODE_MODULE(wut, Init);

NAN_METHOD(Wut){
  NanScope();
  Local<String> foo;

  Local<Object> options;

  if (args.Length()) {
    options = Local<Object>::Cast(args[0]);
    if (options->Has(NanNew("foo"))) {
      std::cout << "has 'foo'" << std::endl;
      Local<Value> foo_ = options->Get(NanNew("foo"));
      if (!foo_->IsString()) {
        std::cout << "'foo' is not a string" << std::endl;
        NanThrowError("foo must be a string");
        std::cout << "we didnt throw or return???" << std::endl;
      }
      std::cout << "'foo' is a string" << std::endl;
      foo = foo_->ToString();
    }
  }

  NanReturnValue(foo);
}

binding.gyp

{
  'targets': [
    {
      'target_name': 'wut',
      'include_dirs': [
        "<!(node -e \"require('nan')\")",
      ],
      'sources': ['binding.cc'],
    },
  ],
}

Makefile

BIN := node_modules/.bin
GYP := $(BIN)/node-gyp
SRC = binding.cc

build: $(SRC) node_modules
	$(GYP) rebuild

node_modules: package.json
	@npm install
	@touch $@

clean: node_modules
	$(GYP) clean

test: build
	node test

.PHONY: clean test

package.json

{
  "name": "wut",
  "dependencies": {
    "bindings": "^1.2.1",
    "nan": "^1.7.0",
    "node-gyp": "^1.0.3"
  },
  "main": "index",
  "scripts": {
    "install": "node-gyp rebuild"
  },
  "gypfile": true
}

test.js

require('bindings')('wut').wut({
  foo: false
});