[HttpKernel][FrameworkBundle] fix compat with Debug component

Author: nicolas-grekas

EventListener/DebugHandlersListener.php

@@ -15,6 +15,7 @@
 use Symfony\Component\Console\ConsoleEvents;
 use Symfony\Component\Console\Event\ConsoleEvent;
 use Symfony\Component\Console\Output\ConsoleOutputInterface;
+use Symfony\Component\Debug\ErrorHandler as LegacyErrorHandler;
 use Symfony\Component\Debug\Exception\FatalThrowableError;
 use Symfony\Component\ErrorHandler\ErrorHandler;
 use Symfony\Component\EventDispatcher\Event;
@@ -79,7 +80,7 @@ public function configure(Event $event = null)
         restore_exception_handler();
 
         if ($this->logger || null !== $this->throwAt) {
-            if ($handler instanceof ErrorHandler) {
+            if ($handler instanceof ErrorHandler || $handler instanceof LegacyErrorHandler) {
                 if ($this->logger) {
                     $handler->setDefaultLogger($this->logger, $this->levels);
                     if (\is_array($this->levels)) {
@@ -138,7 +139,7 @@ public function configure(Event $event = null)
             }
         }
         if ($this->exceptionHandler) {
-            if ($handler instanceof ErrorHandler) {
+            if ($handler instanceof ErrorHandler || $handler instanceof LegacyErrorHandler) {
                 $handler->setExceptionHandler($this->exceptionHandler);
             }
             $this->exceptionHandler = null;