Fatal error while registering new user

The module not work for me anymore. Problem occurs if you let module to create new users while signin (Automatically register new users = YES). I didn't find this yesterday because I tried it on already registered user :(.

Tested on simpletest.me with vanilla twitter 7.x-5.9 without patches. (I'm experiencing same bug with 7.x-5.8+100-dev)
https://dfcq9.ply.st twitter app is configured so you can try it.

Fatal error: Cannot use string offset as an array in /home/dfcq9/www/modules/user/user.module on line 2112

Warning: Missing argument 2 for user_login(), called in /home/dfcq9/www/sites/default/modules/twitter/twitter_signin/twitter_signin.module on line 222 and defined in user_login() (line 2096 of /home/dfcq9/www/modules/user/user.module).
Warning: Illegal string offset 'name' in user_login() (line 2105 of /home/dfcq9/www/modules/user/user.module).
Notice: Array to string conversion in user_login() (line 2105 of /home/dfcq9/www/modules/user/user.module).
Warning: Illegal string offset 'name' in user_login() (line 2112 of /home/dfcq9/www/modules/user/user.module).

This part probably cause it.. user_login expects $form, &$form_state params..

twitter_signin.module line ~224

// Reload the user's account object.
$account = user_login($account->uid);

I think this is pretty critical issue. I'm gonna try to patch it.