Is CI setting new cookies to expire yesterday?

I'm having problems setting a cookie:

PHP Code:

$this->input->set_cookie('XDEBUG_PROFILE', $set); 


The cookie immediately expires the moment it is created. I've chased the problem down to this:

In 3.1.7, in the /system/core/input.php file at line 399, we find this code for setting the expiration of a cookie:

PHP Code:

        if ( ! is_numeric($expire))
        {
            $expire = time() - 86500;
        }
        else
        {
            $expire = ($expire > 0) ? time() + $expire : 0;
        } 


If you don't explicitly pass an expiration time, it defaults to 24 hours ago. Which means cookies will immediately disappear.

Is this a bug? Shouldn't the default expiration time be zero so the cookie expires when the session is ended?

It's not ideal or obvious, but for a work around, we can add an explicit zero for the expiration time like this:

PHP Code:

$this->input->set_cookie('XDEBUG_PROFILE', $set, 0); 


Should I submit a bug report for this or am I missing something?