Comment 11 for bug 1541532

With the switch to configure UTC from /etc/adjtime instead of /etc/default/rcS, I'm having the following regression:

I've installed Xenial some months ago and it's fully updated.
Without customizing it, my /etc/adjtime reads:
0.0 0 0
0

The regression is this:
# timedatectl set-local-rtc 1
Failed to set local RTC: Failed to set RTC to local/UTC: Input/output error

I can work around the issue with two ways:
1) Completely delete /etc/adjtime. Then `timedatectl set-local-rtc 1` generates it, and `timedatectl set-local-rtc 0` deletes it with no errors.
2) Add "LOCAL" or "UTC" to the end of /etc/adjtime. Then again `timedatectl set-local-rtc XXX` works as expected.

Am I supposed not to have that file?
Should I file a bug report against systemd so that it doesn't have parse errors if the LOCAL/UTC keyword is missing?