All handlers are closeable now

src/Monolog/ErrorHandler.php

@@ -176,13 +176,11 @@ class ErrorHandler
 
             if ($this->logger instanceof Logger) {
                 foreach ($this->logger->getHandlers() as $handler) {
-                    if ($handler instanceof AbstractHandler) {
                     $handler->close();
                 }
             }
         }
     }
-    }
 
     private static function codeToString($code)
     {