From e14dd67e85e455d34ea5373ea01835068efe370f Mon Sep 17 00:00:00 2001
From: "Alexander M. Turek" <me@derrabus.de>
Date: Sun, 6 Jun 2021 00:53:17 +0200
Subject: [PATCH] [DependencyInjection] Don't pass null to trim()

---
 .../Component/DependencyInjection/Dumper/PhpDumper.php        | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/Symfony/Component/DependencyInjection/Dumper/PhpDumper.php b/src/Symfony/Component/DependencyInjection/Dumper/PhpDumper.php
index ea11778a64..c38d3eb3d5 100644
--- a/src/Symfony/Component/DependencyInjection/Dumper/PhpDumper.php
+++ b/src/Symfony/Component/DependencyInjection/Dumper/PhpDumper.php
@@ -2147,7 +2147,9 @@ EOF;
         $classes = [];
 
         while ($definition instanceof Definition) {
-            $classes[] = trim($definition->getClass(), '\\');
+            if ($class = $definition->getClass()) {
+                $classes[] = trim($class, '\\');
+            }
             $factory = $definition->getFactory();
 
             if (!\is_array($factory)) {