From 4bb9d8207f76b8760ee0023790065273b5a44a12 Mon Sep 17 00:00:00 2001
From: Ryan Weaver <ryan@thatsquality.com>
Date: Sun, 29 Oct 2017 13:47:23 -0400
Subject: [PATCH] Fixing a bug where non-existent classes would cause issues

---
 .../Command/ContainerDebugCommand.php             | 15 +++++++++++++--
 1 file changed, 13 insertions(+), 2 deletions(-)

diff --git a/src/Symfony/Bundle/FrameworkBundle/Command/ContainerDebugCommand.php b/src/Symfony/Bundle/FrameworkBundle/Command/ContainerDebugCommand.php
index 810c9972b559d..21d1e6d3c9976 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Command/ContainerDebugCommand.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Command/ContainerDebugCommand.php
@@ -238,7 +238,18 @@ public function filterToServiceTypes($serviceId)
             return false;
         }
 
-        // see if the class exists (only need to trigger autoload once)
-        return class_exists($serviceId) || interface_exists($serviceId, false);
+        // if the id has a \, assume it is a class
+        if (false !== strpos($serviceId, '\\')) {
+            return true;
+        }
+
+        try {
+            $r = new \ReflectionClass($serviceId);
+
+            return true;
+        } catch (\ReflectionException $e) {
+            // the service id is not a valid class/interface
+            return false;
+        }
     }
 }