4GB of RAM,
CPU Intel Core DUO T5550 1.83Ghz
Sometimes my laptop (details above) after "shutdown -h now" has been issued
it shuts down OK, presents the final message (The operating system has
halted.Please press any key to reboot) waits few moments and then it shows
and after "trace"
It did happen sometimes in previous OpenBSD versions too.
After reboot the directory "/usr/src/" does not contain any other folders
so finding the mentioned "completion.h" is not possible.