Invalid argument supplied for foreach() in node.module on line 359

I dumped out $param and it seems its value is cancel. Does this make sense to anyone... It seems to me there maybe some confirmation for the delete somewhere and this function is getting confused...

Since I'm a complete newbie at this I not quite sure what is going on but here's what I think:

function invite_delete($email) {
global $user;
$email = urldecode($email);
if ($email){
db_query("DELETE from {invite} WHERE email = '%s'",$email);
drupal_set_message("Invitation to $email has been deleted");
$args = array('email' => $email);
module_invoke_all('invite', 'cancel', $args); // I THINK THIS IS WHERE THE cancel IS COMING FROM
drupal_goto('invite');
}
}

function module_invoke_all() {
$args = func_get_args();
$hook = array_shift($args); // THIS MAKES cancel THE FIRST ARG
$return = array();
foreach (module_implements($hook) as $module) {
$function = $module .'_'. $hook;
$result = call_user_func_array($function, $args); // cancel PASSED INTO THROUGH HERE
if (isset($result) && is_array($result)) {
$return = array_merge($return, $result);
}
else if (isset($result)) {
$return[] = $result;
}
}

return $return;
}

Not sure how to continue from here....but cancel doesn't seem be in key=>value pair.

I wasn't too sure how to proceed from here plus I have so many other issues to work out. If anyone has any ideas, I would appreciate them.