Merge branch '6.4' into 7.0

* 6.4:
  [Filesystem] Fix str_contains deprecation
  [Security] Correctly initialize the voter property
  [ErrorHandler] Skip failing tests when "xdebug.file_link_format" option is defined
  [FrameworkBundle] Fix typo
  Update `changed-translation-files` step with native git diff command
  [DependencyInjection] fix XmlDumper when a tag contains also a 'name' property
  [Lock] Check the correct SQLSTATE error code for MySQL
  [ErrorHandler] Fix `ErrorHandlerTest::tearDown()` visibility
  [Lock] compatiblity with redis cluster 7
  fix: typo
  [Messenger] trigger retry logic when message is a redelivery
  [PropertyAccess] Fix checking for missing properties
  add missing invalid extension error entry

Author: derrabus

Filesystem.php

@@ -190,7 +190,7 @@ private static function doRemove(array $files, bool $isRecursive): void
 
                     throw new IOException(sprintf('Failed to remove directory "%s": ', $file).$lastError);
                 }
-            } elseif (!self::box('unlink', $file) && (str_contains(self::$lastError, 'Permission denied') || file_exists($file))) {
+            } elseif (!self::box('unlink', $file) && ((self::$lastError && str_contains(self::$lastError, 'Permission denied')) || file_exists($file))) {
                 throw new IOException(sprintf('Failed to remove file "%s": ', $file).self::$lastError);
             }
         }