Cron Error: division by zero warning in lib/conditionlib.php

Steps to reproduce it using the Interface (with the patch not applied/reverted): 1: Enable availability (admin/settings.php?section=optionalsubsystems) 2: For a specific quiz/assignment, make the row grade min/max values equal to force a division by zero and have its finalgrade set. 3: Set up conditional availability in (course/modedit.php) (example, have the assignment in step #2 be dependent on the completion of another assignment/quiz) 4: Clear cache 5. Login as an enrolled student to the course and visit the course page to induce the error. After the above 5 steps, if you check the log file, you should see the bellow message. PHP Warning: Division by zero in lib/conditionlib.php on line 1221 Once the warning is reproducible consistently for new enrolled users... 6: Apply the patch, enrol some new users and log in with them, visiting the course page. 7: There shouldn't be more PHP Warnings at all.