If you're getting lots of crashes, it sounds like you have a deeper problem, perhaps hardware (e.g. memory) problems. All the same, debconf itself is purely interpreted and if the perl interpreter crashes then that's its problem.
If you're getting lots of crashes, it sounds like you have a deeper problem, perhaps hardware (e.g. memory) problems. All the same, debconf itself is purely interpreted and if the perl interpreter crashes then that's its problem.