Famdirksen / roles

src/Traits/Slugable.php

<?php

namespace Famdirksen\Roles\Traits;

use Illuminate\Support\Str;

trait Slugable
{
    /**
     * Set slug attribute.
     *
     * @param string $value
     * @return void
     */
    public function setSlugAttribute($value)
    {
        $this->attributes['slug'] = Str::slug($value, config('roles.separator'));

The property attributes does not exist. Although not strictly required by PHP, it is generally a best practice to declare properties explicitly.

    }
}