laravel 5.1 Auth::attempt() don't work after composer update

my project in laravel 5.1 and i can't login after composer update

Everything was working before i did

composer update

I'm using standard built in laravel's register and login process the function Auth::attempt() in AuthController.php always return false.

(i have tested it on a new project of laravel 5.1 and it's the same problem)

I did password reset, created new user, nothing works...

those are the plugin that was updated:

Updating dependencies (including require-dev)
- Removing giggsey/libphonenumber-for-php (7.2.6)
- Installing giggsey/libphonenumber-for-php (7.2.8)
  Downloading: 100%

- Removing symfony/var-dumper (v2.7.10)
- Installing symfony/var-dumper (v2.7.11)
  Downloading: 100%

- Removing symfony/translation (v2.7.10)
- Installing symfony/translation (v2.7.11)
  Downloading: 100%

- Removing symfony/routing (v2.7.10)
- Installing symfony/routing (v2.7.11)
  Downloading: 100%

- Removing symfony/process (v2.7.10)
- Installing symfony/process (v2.7.11)
  Downloading: 100%

- Installing symfony/polyfill-mbstring (v1.1.1)
  Downloading: 100%

- Removing symfony/http-foundation (v2.7.10)
- Installing symfony/http-foundation (v2.7.11)
  Downloading: 100%

- Removing symfony/event-dispatcher (v2.8.3)
- Installing symfony/event-dispatcher (v2.8.4)
  Downloading: 100%

- Removing symfony/debug (v2.7.10)
- Installing symfony/debug (v2.7.11)
  Downloading: 100%

- Removing symfony/http-kernel (v2.7.10)
- Installing symfony/http-kernel (v2.7.11)
  Downloading: 100%

- Removing symfony/finder (v2.7.10)
- Installing symfony/finder (v2.7.11)
  Downloading: 100%

- Removing symfony/dom-crawler (v2.7.10)
- Installing symfony/dom-crawler (v2.7.11)
  Downloading: 100%

- Removing symfony/css-selector (v2.7.10)
- Installing symfony/css-selector (v2.7.11)
  Downloading: 100%

- Removing symfony/console (v2.7.10)
- Installing symfony/console (v2.7.11)
  Downloading: 100%

- Removing psy/psysh (v0.7.1)
- Installing psy/psysh (v0.7.2)
  Downloading: 100%

- Removing paragonie/random_compat (v1.2.1)
- Installing paragonie/random_compat (v1.4.1)
  Downloading: 100%

- Removing monolog/monolog (1.18.0)
- Installing monolog/monolog (1.18.1)
  Downloading: 100%

- Removing league/flysystem (1.0.18)
- Installing league/flysystem (1.0.20)
  Downloading: 100%

- Removing symfony/polyfill-util (v1.1.0)
- Installing symfony/polyfill-util (v1.1.1)
  Downloading: 100%

- Removing symfony/polyfill-php56 (v1.1.0)
- Installing symfony/polyfill-php56 (v1.1.1)
  Downloading: 100%

- Removing propaganistas/laravel-phone (2.6.1)
- Installing propaganistas/laravel-phone (2.7.0)
  Downloading: 100%

- Removing symfony/yaml (v3.0.3)
- Installing symfony/yaml (v3.0.4)
  Downloading: 100%

- Removing phpunit/phpunit (4.8.23)
- Installing phpunit/phpunit (4.8.24)
  Downloading: 100%

- Removing phpspec/phpspec (2.4.1)
- Installing phpspec/phpspec (2.5.0)
  Downloading: 100%

any idea which plugin causing the problem? any workaround or idea how to fix this ?

via Chebli Mohamed