Error in custom code produces seemingly unrelated message

[bobdenotter]

If you're building a Bolt project, and you've unnoticedly made an error in your custom code, you'd expect a descriptive error.

For example, notice the trailing comma below (which is only valid in PHP 7.3 and up, not on 7.2)

<?php

namespace App;

use Bolt\Extension\BaseExtension;

class Extension extends BaseExtension
{
    public function getName(): string
    {
        return sprintf(
            '%s %s', 
            "foo", 
            "bar",
        );
    }
}

The error you're getting is this:

$ bin/console bolt:info

In DefinitionErrorExceptionPass.php line 54:

  Cannot autowire service "Bolt\Article\Controller\Upload": argument "$articleConfig" of method "__constr
  uct()" references class "Bolt\Article\ArticleConfig" but no such service exists.

This is terribly confusing, obviously.

PR with a fix is incoming.