FuelPHP 1.4 - cannot extend Arr class

[assembledadam]

To reproduce:

(With fresh copy of 1.4).

1. Create a new package (I called mine 'platform') in the fuel/packages dir (default packages location).
2. Add bootstrap.php and classes/arr.php in your platform package dir
3. Add the following to classes/arr.php

namespace Platform;

class Arr extends \Fuel\Core\Arr
{
 public static function test()
 {
  \Debug::dump('MY ARR IS ALIVE!');
 }
}

1. Add the following to your package bootstrap:

Autoloader::add_core_namespace('Platform');

Autoloader::add_classes(array(
    'Platform\\Arr'    => __DIR__.'/classes/arr.php',
));

1. Add 'platform' to the list of packages to autoload in config.
2. Attempt to call a method within the extended Arr class in a controller

Result:

ErrorException [ Error ]: Call to undefined method Fuel\Core\Arr::test()

This same method works for all other classes NOT listed in the docs as being an issue, that is apart from 'profiler', when switched on - in that situation you get a big fatal error (i'll list that as a separate issue once this one is sorted most likely).

[WanWizard]

Documentation updated: https://github.com/fuel/docs/commit/49e904ae59a63142222ed2900d3fd6822485fece