To reproduce:

1. Allow guest access to course.
2. Login as user not enrolled in course and access it as a guest.
3. Attempt to access SCORM activity in course.

Expected result:

User not allowed to access the SCORM activity as a guest.

Actual result:

User allowed to enter the activity in normal mode. The following error is then displayed:

Fatal error: Class 'completion_info' not found in /var/www/head/moodle/mod/scorm/player.php on line 246