[systemd-bugs] [Bug 84867] New: journalctl misbehaves with --lines

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=84867

            Bug ID: 84867
           Summary: journalctl misbehaves with --lines
           Product: systemd
           Version: unspecified
          Hardware: Other
                OS: All
            Status: NEW
          Severity: critical
          Priority: medium
         Component: general
          Assignee: systemd-bugs at lists.freedesktop.org
          Reporter: marius.vollmer at redhat.com
        QA Contact: systemd-bugs at lists.freedesktop.org

systemd-215-14.fc21.x86_64

With this set of journal files

    files.cockpit-project.org/files/journal-bug.tar.xz

I can see this behavior:

$ journalctl -D ./journal.bug/ _SYSTEMD_UNIT=accounts-daemon.service | tail -5
Oct 10 09:44:07 f21.cockpit.lan accounts-daemon[1178]: started daemon version
0.6.38
Oct 10 09:57:47 f21.cockpit.lan accounts-daemon[1178]: request by
system-bus-name::1.12 [/usr/libexec/cockpitd pid:1169 uid:1000]: delete user
'junior' (1001)
Oct 10 09:57:47 f21.cockpit.lan userdel[4245]: delete user 'junior'
Oct 10 09:57:47 f21.cockpit.lan userdel[4245]: removed group 'junior' owned by
'junior'
Oct 10 09:57:47 f21.cockpit.lan userdel[4245]: removed shadow group 'junior'
owned by 'junior'

$ journalctl -D ./journal.bug/ _SYSTEMD_UNIT=accounts-daemon.service
--lines=100 | tail -5
Oct 08 10:35:52 f21.cockpit.lan accounts-daemon[1255]: started daemon version
0.6.38
-- Reboot --
Oct 08 14:08:00 f21.cockpit.lan accounts-daemon[1937]: started daemon version
0.6.38
-- Reboot --
Oct 10 09:44:07 f21.cockpit.lan accounts-daemon[1178]: started daemon version
0.6.38

That is, when using --lines, journalctl omits some lines at the end. 
Erroneously omitting journal lines is critical, I think.

(The journal files might be corruped since they come from a machine that is
being mistreated quite badly, but journalctl doesn't give any sign of that.)

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