Issue #3259674 by longwave, andypost: [Symfony 6]...

    $collection = $this->applyRouteFilters($collection, $request);

    $collection = $this->applyFitOrder($collection);

    if ($ret = $this->matchCollection(rawurldecode($this->currentPath->getPath($request)), $collection)) {

    $ret = $this->matchCollection(rawurldecode($this->currentPath->getPath($request)), $collection);

    return $this->applyRouteEnhancers($ret, $request);

  }

    throw 0 < count($this->allow)

      ? new MethodNotAllowedException(array_unique($this->allow))

      : new ResourceNotFoundException(sprintf('No routes found for "%s".', $this->currentPath->getPath()));

  }

  /**

   * Tries to match a URL with a set of routes.

   *

   * @param string $pathinfo

   *   The path info to be parsed

   * @param \Symfony\Component\Routing\RouteCollection $routes

   *   The set of routes.

   *

   * @return array|null

   *   An array of parameters. NULL when there is no match.

   * {@inheritdoc}

   */

  protected function matchCollection($pathinfo, RouteCollection $routes) {

  protected function matchCollection($pathinfo, RouteCollection $routes): array {

    // Try a case-sensitive match.

    $match = $this->doMatchCollection($pathinfo, $routes, TRUE);

    // Try a case-insensitive match.

    if ($match === NULL && $routes->count() > 0) {

      $match = $this->doMatchCollection($pathinfo, $routes, FALSE);

    }

    if ($match === NULL) {

      throw 0 < count($this->allow)

        ? new MethodNotAllowedException(array_unique($this->allow))

        : new ResourceNotFoundException(sprintf('No routes found for "%s".', $this->currentPath->getPath()));

    }

    return $match;

  }