[10.x] Nullable failed method

[timacdonald]

The exception may be null if you call the fail method without passing a string or exception, as documented.

So having this nullable in the docs seems more sensible, as the two documented version do not currently work together. If this were typed with Throwable an exception would be thrown when the queue worker attempts to call the job's failed method.

<?php

namespace App\Jobs;

use Illuminate\Bus\Queueable;
use Illuminate\Contracts\Queue\ShouldQueue;
use Illuminate\Foundation\Bus\Dispatchable;
use Illuminate\Queue\InteractsWithQueue;
use Illuminate\Queue\SerializesModels;

class TestJob implements ShouldQueue
{
    use Dispatchable, InteractsWithQueue, Queueable, SerializesModels;

    public function handle(): void
    {
        $this->fail();
    }

    public function failed($e)
    {
        dd($e); // null
    }
}