Ticket #35602: 35602_01.patch

wp-admin/includes/image-edit.php

@@ -251 +251 @@
                  * @param int             $post_id Post ID.
                  */
                 $image = apply_filters( 'image_editor_save_pre', $image, $post_id );
-
+                while ( @ob_end_clean() );
+                
                 if ( is_wp_error( $image->stream( $mime_type ) ) )
                         return false;