DragonFlyBSD

I was running a bulk build, and one of my cron jobs, which runs every six minutes, was backlogged, with about 11 processes running when there should be at most 1. I listed them with pidof, then killed them, then checked if any were left. The computer did not answer, but rebooted. When it came up again, I found both a ps core file and a kernel dump with the same filetime. This doesn't quite make sense, as I was running pidof, not ps. They're in dump 13 in my crash directory. This is version 3.1.0.274.