diff --git a/core/lib/Drupal/Core/Routing/MatcherDumper.php b/core/lib/Drupal/Core/Routing/MatcherDumper.php
index 693c356dec0e958de80b73095eefd434ba6d14b3..48b2d8c1d16ba57fd0fe60d7c87b164fca8aa0b3 100644
--- a/core/lib/Drupal/Core/Routing/MatcherDumper.php
+++ b/core/lib/Drupal/Core/Routing/MatcherDumper.php
@@ -111,12 +111,7 @@ public function dump(array $options = array()) {
         'pattern' => $compiled->getPattern(),
         'pattern_outline' => $compiled->getPatternOutline(),
         'number_parts' => $compiled->getNumParts(),
-        // This is only temporary. We need to strip off the compiled route from
-        // route object in order to serialize it. Cloning strips off the
-        // compiled route object. Remove this once
-        // https://github.com/symfony/symfony/pull/4755 is merged and brought
-        // back downstream.
-        'route' => serialize(clone($route)),
+        'route' => serialize($route),
       );
       $insert->values($values);
     }
diff --git a/core/lib/Drupal/Core/Routing/PathMatcher.php b/core/lib/Drupal/Core/Routing/PathMatcher.php
index cef1a0a07cced30a08870189cb06d7d54a97970c..f037d9acb4100ec70c77c7e7053cd0d77ac6ae2e 100644
--- a/core/lib/Drupal/Core/Routing/PathMatcher.php
+++ b/core/lib/Drupal/Core/Routing/PathMatcher.php
@@ -75,7 +75,7 @@ public function matchRequestPartial(Request $request) {
       }
     }
 
-    if (!count($collection->all())) {
+    if (!count($collection)) {
       throw new ResourceNotFoundException();
     }