Strange hook name

[F J Kaiser]

In /core_root/wp-include/post.php line 884 is the following hook:

add_action( 'future_' . $post_type, '_future_post_hook', 5, 2 );

Example: future_events_future_post_hook

Looks pretty strange. I hope that one isn't used to often, so the name can still be changed...

It's add_action not do_action. do_action names the hook. The hook name is not future_{$post_type}_future_post_hook, it is future_{$post_type}.