当在我的CategoryFactory中执行自引用关系时，我得到以下错误'The process has been signaled with signal“11”.'。例如，我有以下代码：
CategoryTest.php

<?php

namespace Tests\Unit\Models\Categories;

use App\Models\Category;
use Tests\TestCase;

class CategoryTest extends TestCase
{
    /**
     * A basic unit test example.
     *
     * @return void
     */
    public function test_it_has_children()
    {
        $category = Category::factory()
            ->has(Category::factory()->count(3), 'children')
            ->create();

        $this->assertInstanceOf(Category::class, $category->children->first());
    }
}

看起来这就是错误的来源。我现在确定这是否是引用hasMany关系的正确方法。
CategoryFactory.php

<?php

namespace Database\Factories;

use App\Models\Category;
use Illuminate\Database\Eloquent\Factories\Factory;
use Illuminate\Support\Str;

class CategoryFactory extends Factory
{
    /**
     * The name of the factory's corresponding model.
     *
     * @var string
     */
    protected $model = Category::class;

    /**
     * Define the model's default state.
     *
     * @return array
     */
    public function definition()
    {
        return [
            'name' => $name = $this->faker->unique()->name,
            'slug' => Str::of($name)->slug('-'),
            'parent_id' => Category::factory() // This seems to be causing the error
        ];
    }
}

Category.php

<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Builder;
use Illuminate\Database\Eloquent\Factories\HasFactory;
use Illuminate\Database\Eloquent\Model;

class Category extends Model
{
    use HasFactory;

    protected $fillable = [
        'name',
        'slug',
        'order'
    ];

    public function children()
    {
        return $this->hasMany(Category::class, 'parent_id', 'id');
    }
}

我不知道这个错误可能指向什么