Browsing through logs, I'm seeing that DUTs in the Autotest Lab
accumulate a lot of crash dumps with the name "debugd" embedded
in them.  To see it, I'm running commands like this:

$ dut-status -f -b nyan_big -p bvt -d 8 | grep provision | sed 's=.*\(results/.*\)=gsutil cat gs://chromeos-autotest-\1*/status.log=' | sh | grep crashdump

That produces lots of lines like this:
INFO	----	----	timestamp=1528201606	localtime=Jun 05 05:26:46	Host crashdump exists: /var/spool/crash/vpd.20180605.122501.553.core

So far, I've only seen this on nyan_big.