Long quiz names break deletion ad hoc task when questions are backed up

(difficulty: easy, requires teacher access to a course) Log in as a teacher and go to a course Turn editing mode on Add an activity “Quiz” with a super long name, preferably 255 characters Save it and click on “Edit Quiz” Add a question, any type, but select the category as “Default for {quiz name}” under “Quiz : {quiz name}” Verify that “Default for {quiz name}” category name has been shortened slightly, so that it does not overflow the 255 char limit on category names Save the question Go to "site administration" and go to "manage courses & categories" Move the particular course to another category Now delete the course Verify that there is no database error caused by something being longer than 255 characters