1. Login as admin.
2. Turn debugging ON.
3. Create a course and enable completion tracking.
4. Under Course administration go to Badges ► Manage badges
5. Add a new badge.
6. On the badge's page, click on the Criteria.
7. Under Add badge criteria, select Course completion
8. Enter a value for the Minimum grade required, then click Save.
9. Open another window and delete the course.
10. Refresh the page with the badge settings.
11. The following message is displayed:

    Users must complete the course Warning: This course is no longer available.

It should read either warning or proper completion requirement.