Our UrlMatcher has no need for the constructor parameters, so eliminate them entirely to simplify matters.

core/lib/Drupal/Core/Routing/UrlMatcher.php

@@ -2,6 +2,9 @@
 
 namespace Drupal\Core\Routing;
 
+use Symfony\Component\HttpFoundation\Request;
+use Symfony\Component\Routing\RouteCollection;
+use Symfony\Component\Routing\RequestContext;
 use Symfony\Cmf\Component\Routing\NestedMatcher\UrlMatcher as BaseUrlMatcher;
 
 /**
@@ -11,6 +14,8 @@ use Symfony\Cmf\Component\Routing\NestedMatcher\UrlMatcher as BaseUrlMatcher;
  */
 class UrlMatcher extends BaseUrlMatcher {
 
+  public function __construct() {}
+
   public function finalMatch(RouteCollection $collection, Request $request) {
     $this->routes = $collection;
     $context = new RequestContext();