framework: Partial Resource Routes only() except() why throw an error instead of 404 ?

• Laravel Version: 5.6
• PHP Version: 7.1.19

Description:

https://laravel.com/docs/5.6/controllers#resource-controllers

when i create a controller by php artisan make:controller TestController --resource --model=Test and use route: Route::resource('/test', 'TestController')->only(['index', 'store', 'edit', 'update', 'destroy']); or Route::resource('/test', 'TestController')->except(['create', 'show']);

if go to http://example.com/test/1 (actually this is route test.show) why throw an error instead of 404? Symfony \ Component \ HttpKernel \ Exception \ MethodNotAllowedHttpException