'last' command output is wrong

[Nick Rose]

Xubuntu 15.10
util-linux 2.26.2-6ubuntu3

The output of 'last reboot' is wrong. It says 'reboot' is 'still running' when it shouldn't be, and then arbitrarily 'reboot' stops running, causing strange lines such as:

reboot system boot 4.2.0-30-generic Tue Mar 22 21:25 - 22:59 (2+01:33)

This line shows that 'reboot' was logged in from 9:25pm to 10:59pm on the same day, but the total login time was 2 days, 1 hour and 33 minutes.

'reboot' can be 'still running' multiple times simultaneously.

I've attached the results of these commands:

last reboot
last -f /var/log/wtmp.1 reboot
last
last -f /var/log/wtmp.1

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.