"Recoverable fatal error: Argument 2 passed to Drupal\Core\Template\TwigExtension::__construct() must implement interface Drupal\Core\Routing\UrlGeneratorInterface, none given" when a Twig extension extends TwigExtension rather than \Twig_Extension

After upgrading my site to Drupal 8.3.0, my existing twig extensions which were previously working fine don't work anymore, and their presence actually causes the site to not load. The following error is in my nginx logs:

2017/04/12 16:40:32 [error] 1428#0: *10 FastCGI sent in stderr: "PHP message: Recoverable fatal error: Argument 2 passed to Drupal\Core\Template\TwigExtension::__construct() must implement interface Drupal\Core\Routing\UrlGeneratorInterface, none given, called in /var/www/core/lib/Drupal/Component/DependencyInjection/Container.php on line 268 and defined in /var/www/core/lib/Drupal/Core/Template/TwigExtension.php on line 68 #0 /var/www/core/includes/bootstrap.inc(552): _drupal_error_handler_real(4096, 'Argument 2 pass...', '/var/www/core/l...', 68, Array)
#1 /var/www/core/lib/Drupal/Core/Template/TwigExtension.php(68): _drupal_error_handler(4096, 'Argument 2 pass...', '/var/www/core/l...', 68, Array)
#2 /var/www/core/lib/Drupal/Component/DependencyInjection/Container.php(268): Drupal\Core\Template\TwigExtension->__construct(Object(Drupal\Core\Render\Renderer))
#3 /var/www/core/lib/Drupal/Component/DependencyInjection/Container.php(177): Drupal\Component\DependencyInjection\Container->createService(Array, 'my_module.twig.g...')
#4 /var/www/core/lib/Drupal/Component/Depen" while reading response header from upstream, client: my-ip-address, server: my-domain, request: "GET / HTTP/1.1", upstream: "fastcgi://unix:/var/run/php/php5.6-fpm.sock:", host: "my-domain"

Here is an example extension which worked on 8.2.x. This issue has been happening for all twig extensions, not just this simple and probably unnecessary one:

/modes/custom/my_module/src/TwigExtension/GetQueryParam.php:

  namespace Drupal\my_module\TwigExtension;

  use Drupal\Core\Template\TwigExtension;

  class getQueryParam extends TwigExtension {

    public function getFunctions() {
      return array(
        'get_query_param' => new \Twig_Function_Function(['Drupal\my_module\TwigExtension\GetQueryParam', 'getQueryParam']),
      );
    }

    public function getName() {
      return 'my_module.get_query_param';
    }

    public static function getQueryParam($param) {
      return (isset($_GET[$param]) ? $_GET[$param] : NULL);
    }

  }

/modules/custom/my_module/my_module.services.yml:

services:
  my_module.twig.get_query_param:
    arguments: ['@renderer']
    class: Drupal\my_module\TwigExtension\GetQueryParam
    tags:
      - { name: twig.extension }

I'll be investigating to see if I can find a solution, since I can't update to 8.3.0 currently. No obvious fix stood out to me, and there's nothing in the 8.3 changelog discussing a change to how TwigExtensions works; I know Twig itself was updated, but that ticket (#2804365) doesn't indicate any change to how extensions would work with regards to this URlGeneratorInterface class which the error message is concerned about.

If there was some change to how TwigExtensions should be created that breaks backwards compatibility, it seems like either a bug or like something that should be noted in the change notes for 8.3.