There is no problem with that. A program execution is a result of a given input. Error condition is therefore a result of a set of conditions leading to a fault

There is no problem with that. A program execution is a result of a given input. Error condition is therefore a result of a set of conditions leading to a fault. There faults can be recreated. The only two things I was not able to test reliably so far are: network latency / failure and disk latency. That is possible with firecracker but I haven’t had a need to go so elaborate yet.