laravel relacionamentos

gistfile1.txt

##Model##
class Role_User extends Model
{
	protected $table = 'role_user';
    protected $fillable = ['id','user_id','role_id'];

    public function users()
    {
    	return $this->belongsTo('App\User');
    }
    
    public function roles()
    {
    	return $this->belongsTo('App\Role');
    }
}

class Role extends Model
{
    public function role_user()
    {
    	return $this->hasMany('App\Role_User');
    }
}
//abreviei para no fica um monte de linhas
class User extends Authenticatable
{
    public function role_user()
    {
        return $this->hasMany('App\Role_User');
    }
}

##controller##
<?php

namespace App\Http\Controllers;

use Illuminate\Http\Request;
use App\Role_User;

class RoleController extends Controller
{
    /**
     * Display a listing of the resource.
     *
     * @return \Illuminate\Http\Response
     */
    public function index(Request $request)
    {
        $perfis = Role_User::with(['users','roles'])->first()->paginate(10);

        return view('perfil.list',compact('perfis'))
             ->with('i', ($request->input('page', 1) - 1) * 10);
    }
}

##view##
<div class="panel-body">

					<div class="table-responsive">

						<table class="table table-hover table-responsive table-bordered table-striped">
							<tr class="active">
								<th>Usuário</th>
								<th>Perfil</th>
								<th class="text-center">Excluir</th>
							</tr>
							@foreach ($perfis as $pe)
							<tr>
								<td>{{ $pe->users->name }}</td>
								<td>{{ $pe->roles->perfil }}</td>
								
								<td class="text-center"><strong>
								{{ Form::open(array('url' => 'peril/'.$pe->id, 'class' =>'text-center', 'onclick' => 'return confirm("Deseja realmente excluir esse registro?")')) }} 
								{{ Form::hidden('_method', 'DELETE') }} 
								{{ Form::submit('Excluir', array('class' => 'btn btn-danger btn-xs bold')) }} 
								{{ Form::close() }}
								</strong></td>
								
							</tr>
							@endforeach
						</table>
						
						{!! $perfis->appends(request()->input())->links() !!}

					</div>

Error: Trying to get property of non-object (View: /opt/lampp/htdocs/nsigtur/resources/views/perfil/list.blade.php)