#943807 ^C on -f ends so abruptly that there isn't even a message

Package:
isc-dhcp-server
Source:
isc-dhcp
Description:
ISC DHCP server for automatic IP address assignment
Submitter:
積丹尼 Dan Jacobson
Date:
2019-10-30 02:33:16 UTC
Severity:
minor
#943807#5
Date:
2019-10-29 21:34:37 UTC
From:
To:
# dhcpd -f -d -cf /tmp/dhcpd.conf wlp2s0b1
...
Config file: /tmp/dhcpd.conf
Database file: /var/lib/dhcp/dhcpd.leases
PID file: /var/run/dhcpd.pid
Wrote 0 leases to leases file.
Listening on LPF/wlp2s0b1/08:3e:8e:aa:65:d1/192.168.1.0/24
Sending on   LPF/wlp2s0b1/08:3e:8e:aa:65:d1/192.168.1.0/24
Sending on   Socket/fallback/fallback-net
Server starting service.

OK that's great.

However if one then hits ^C.

1. There is not even a peep. No message that the service is ending. Not
on STDERR, not in journalctl.

(2. The service indeed ends (pidof dhcpd finds none), however the pid
files aren't cleaned up. Perhaps do that.)

Same problem with hangup,
# killall -1 dhcpd

I'm saying that there are tons of messages saying it is starting, but
not even one saying it is ending.