Make callback with buffer as argument

[g00dnatur3]

Hello,

I'm having trouble making a callback and passing a Buffer as the argument.

Look at the code here:

v8::Local<v8::Function> callback;

void SetCallback(const Nan::FunctionCallbackInfo<v8::Value>& info) {
  callback = info[0].As<v8::Function>();
}

void do_callback() {
    int size = 100;
    v8::MaybeLocal<v8::Object> obj = Nan::NewBuffer(size);
    const unsigned argc = 1;
    args[1] = { obj.ToLocalChecked() };
    Nan::MakeCallback(Nan::GetCurrentContext()->Global(), callback, argc, args);
}

I always get "segmentation fault" and I do not know why..

To keep the code simple I am just intializing a new Buffer with size only..

However i would like to intialize the Buffer with data like so:

char* data =...
v8::MaybeLocal<v8::Object> obj = Nan::NewBuffer(data, size);

My goal is to callback a javascript function with a Buffer that is wrapped around an existing char pointer..

Please help.

Thank you!