Index: wp-admin/includes/meta-boxes.php
IDEA additional info:
Subsystem: com.intellij.openapi.diff.impl.patch.CharsetEP
<+>UTF-8
===================================================================
--- wp-admin/includes/meta-boxes.php	(revision 703d5bdc8deb17781e9c6d8f0dd7e2c6b6353885)
+++ wp-admin/includes/meta-boxes.php	(revision )
@@ -230,8 +230,9 @@
  * Fires at the beginning of the publishing actions section of the Publish meta box.
  *
  * @since 2.7.0
+ * @since 4.5.0 Added the `$post` parameter.
  */
-do_action( 'post_submitbox_start' );
+do_action( 'post_submitbox_start', $post );
 ?>
 <div id="delete-action">
 <?php
@@ -311,8 +312,9 @@
 	 * in the attachment editing screen.
 	 *
 	 * @since 3.5.0
+	 * @since 4.5.0 Added the `$post` parameter.
 	 */
-	do_action( 'attachment_submitbox_misc_actions' );
+	do_action( 'attachment_submitbox_misc_actions', $post );
 	?>
 </div><!-- #misc-publishing-actions -->
 <div class="clear"></div>