A company I worked for licensed a managed language VM, which was being used to operate an airport people mover, which was crashing after just shy of 50 days. (C

A company I worked for licensed a managed language VM, which was being used to operate an airport people mover, which was crashing after just shy of 50 days. (Crashing software-wise, not physically. It would just awkwardly stop.) It turned out to be an integer overflow. If this was a 32 bit register for milliseconds, what would be about right.