fix merge

Author: nicolas-grekas

Factory/PsrHttpFactory.php

@@ -167,8 +167,11 @@ public function createResponse(Response $symfonyResponse): ResponseInterface
                     return '';
                 }, 1);
 
-                $symfonyResponse->sendContent();
-                ob_end_clean();
+		try {
+                    $symfonyResponse->sendContent();
+                } finally {
+                    ob_end_clean();
+                }
             } else {
                 $stream->write($symfonyResponse->getContent());
             }