domain error

domain_error.js

var r = require('rethinkdb');
var domain = require('domain');
var d = domain.create();
r.connect({host: "127.0.0.1", port: "28015"}, function(err, connection){
    d.run(function(){
        // Demonstrate domain is preserved over setTimeout
        setTimeout(function(){
            console.log("setTimeout has right domain:", process.domain === d);
        }, 1);

        // Demonstrate domain is lost over r.[query].run
        r.expr(1).run(connection, function(){
            console.log("Callback has right domain:", process.domain === d);
        })

        r.expr(1).run(connection).then(function(result){
            console.log("Promise has right domain:", process.domain === d);
        })
    });
});