composer update后访问根路由/报错undefined method

Symfony \ Component \ Debug \ Exception \ FatalErrorException (E_ERROR)
Call to undefined method Illuminate\Routing\Route::get()

app.php的providers和aliases都已注释添加的内容
composer.json主要内容如下：
"repositories": [
{
"type": "vcs",
"url": "https://github.com/Zizaco/ardent.git"
}
],
"require": {
"laravel/framework": "4.2.",
"frozennode/administrator": "dev-master",
"maximebf/debugbar": "1.",
"daylerees/anbu": "dev-master"
},
"scripts": {
"post-install-cmd": [
"php artisan clear-compiled",
"php artisan optimize"
],
"post-update-cmd": [
"php artisan clear-compiled",
"php artisan asset:publish frozennode/administrator",
"php artisan optimize"
],
"post-create-project-cmd": [
"php artisan key:generate"
]
},

求教各位兄台这是什么情况？如何解决啊？