为什么我的刀片有Undefined Variable - Laravel 4.2

This is on my routes.php

Route::get('registration/verify/{confirmation}', ['as'=>'verify', 'uses'=>'HomeController@verify']);
Route::get('login',     ['as'=>'login', 'uses'=>'HomeController@getLogin']);

and on my blade is this

then on my HomeController.php where the error belong

public function verify($confirmation)
{
    $user = User::where('activation_code', '=', $confirmation)->first();

    return Redirect::route('login')
        ->withInput(['email' => $user->email])
        ->with('fuck', 'wtf');
}

and I got error like this

Undefined variable: fuck (View: C:\Program Files (x86)\Ampps\www\tridg\local\app\views\auth\login.blade.php)

I don't know where I been wrong, I'm so confident that this is correct.

EDIT1:

I even tried this

public function verify($confirmation)
{
    $user = User::where('activation_code', '=', $confirmation)->first();
    // $user->active = 1;
    // $user->save();

    return Redirect::route('login', ['fuck'=>'wtf'])
            ->withInput(['email' => $user->email]);
}