Translatable Strings + Version 2.6.0

[justb3a]

I use Twig as template engine and to enable string translation I wrote a litte helper function. In 2.5.x everything works well. Now I upgraded to 2.6.0 and got the following (strange) problem:
 
Default language - everything works as expected.
Second language - error (white page, stopped rendering output after first string translation) Error: Nesting level too deep - recursive dependency? 
 
Twig Helper function:

$function = new Twig_SimpleFunction("__", function ($text, $filename = '') {
  if (!empty($filename) && $this->twig->getLoader()->exists($filename . '.twig')) {
    $textdomain = $this->twig->getLoader()->getCacheKey($filename . '.twig');
    return __($text, $textdomain);
  }
});

 
The problem occurs in wire/core/LanguageFunctions.php. In line 26 the second parameter $textdomain is supposed to be a string. 

* @param string $textdomain Textdomain for the text, may be class name, filename, or something made up by you. If ommitted, a debug backtrace will attempt to determine it automatically.

function __($text, $textdomain = null, $context = '') {

But wire/modules/LanguageSupport/LanguageSupport.module line 186 and 188 use the $this->_('string') function:

186: $this->wire('config')->dateFormat = $this->_('Y-m-d H:i:s');
188: $locale = $this->_('C');

 
This calls wire/core/Wire.php line 1094.

public function _($text) {
  return __($text, $this);
}

 
$this is passed as second parameter  / $textdomain (which should be a string). But $this is in this case an object(LanguageSupport).

Dirty workaround at this moment: remove translate ($this->_('string')) call in wire/modules/LanguageSupport/LanguageSupport.module and just pass string.
 
Any ideas how to solve this without touching the core? 

[justb3a]

After a lot of testing I found the solution for my problem by myself. Comparing objects in a template leads to this behavior (it works using ProcessWire version 2.5.3):

- <li class="nav-meta__item{% if language == user.language %}  nav-meta__item--active{% endif %}">
+ <li class="nav-meta__item{% if language.id == user.language.id %}  nav-meta__item--active{% endif %}">