Uncaught TypeError

[ssnepenthe]

Fatal error: Uncaught TypeError: Argument 1 passed to SSNepenthe\Soter\Listeners\Log_Vulnerability_Ids::log_vulnerability_ids() must be of the type array, object given, called in /srv/www/wordpress-default/public_html/wp-includes/class-wp-hook.php on line 298 and defined in /srv/www/wordpress-default/public_html/wp-content/plugins/soter/src/Listeners/class-log-vulnerability-ids.php:51

[ssnepenthe]

It looks like this stems from the following lines in the definition of do_action():

if ( is_array($arg) && 1 == count($arg) && isset($arg[0]) && is_object($arg[0]) ) // array(&$this)
		$args[] =& $arg[0];

When calling do_action( 'soter_check_packages_complete', $vulnerabilities ) where $vulnerabilities is an array containing only a single Vulnerability object, WordPress is passing that object to WP_Hook::do_action() instead of the full array.

Solution is probably going to be to drop the array type hints and add conditionals to ensure we are actually working with an array.

[ssnepenthe]

Looks like there is already an issue filed:

https://core.trac.wordpress.org/ticket/40284