Comment 3 for bug 1269177

The bug is still reproducible in xenial.

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# lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 16.04.3 LTS
Release: 16.04
Codename: xenial

# grep Automatic-Reboot /etc/apt/apt.conf.d/50unattended-upgrades
Unattended-Upgrade::Automatic-Reboot "true";
//Unattended-Upgrade::Automatic-Reboot-Time "02:00";

# dpkg -l unattended-upgrades
Desired=Unknown/Install/Remove/Purge/Hold
| Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend
|/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)
||/ Name Version Architecture Description
+++-===========================================-==========================-==========================-===========================================================================================
ii unattended-upgrades 0.90ubuntu0.8 all automatic installation of security upgrades

# touch /var/run/reboot-required

# unattended-upgrades --dry-run

(System reboots)