This bug was the good kind!
...
And to show how genuinely surprised scientists are at the long duration of the rovers, scientists recently had to solve a problem similar to the "Y2K" crisis of 1999-2000. In the latest revision of software sent to the rovers, programmers had to add a fourth digit to the assignment of tasks for each Mars day. When the rovers were designed, no one could imagine they would still be thriving more than 999 sols, or Mars days.
Is that a good kind of problem to have?
"Absolutely!" said Banerdt.
...
And to show how genuinely surprised scientists are at the long duration of the rovers, scientists recently had to solve a problem similar to the "Y2K" crisis of 1999-2000. In the latest revision of software sent to the rovers, programmers had to add a fourth digit to the assignment of tasks for each Mars day. When the rovers were designed, no one could imagine they would still be thriving more than 999 sols, or Mars days.
Is that a good kind of problem to have?
"Absolutely!" said Banerdt.
...