When a option --name is not set on CLI, initial value is a [Function]

Example:

var Command = require('commander').Command;
var program = new Command('my-cli');

program
  .version('0.0.1')
  .option('--name <name>', 'Set name')
  .option('--name-prefix <name>', 'Set prefix name')
 .parse(process.argv);
  })
...

console.log('name: ' , program.name)
console.log('namePrefix: ', program.namePrefix)

The ouput of $ my-cli --name-prefix=test is:

name: [Function]
namePrefix: test

Here name should be undefined

The ouput of $ my-cli --name=test is:

name: test
namePrefix: undefined

Here is ok!

IMHO a widely use option like '--name' that collide with [Command.name] should have a dedicated check and initialization branch in code.