Lubuntu 18.04.1 Crashes Spontaneously

[Ilya Ig. Petrov]

Starting from 08.10.2018 I experience spontaneous crashes in Lubuntu 18.04.1 (two crashes in the last 2 days).
I can't associate it with any steps from my side.
Error reporting dialog may open when I use browser or when I use leafpad.
If I press "Show Details" dialog closes without any response.
So I started pressing "Send" in hope it will report the problem successfully.
A screenshot of the error reporting dialog is attached.

I see nothing suspicious in dmesg or syslog.

Here is the tail of dmesg:

[ 73.615416] IPv6: ADDRCONF(NETDEV_CHANGE): wlp2s0: link becomes ready
[ 211.167846] perf: interrupt took too long (2513 > 2500), lowering kernel.perf_event_max_sample_rate to 79500
[ 446.155101] perf: interrupt took too long (3144 > 3141), lowering kernel.perf_event_max_sample_rate to 63500
[ 819.275678] perf: interrupt took too long (3942 > 3930), lowering kernel.perf_event_max_sample_rate to 50500
[ 1973.217158] perf: interrupt took too long (4946 > 4927), lowering kernel.perf_event_max_sample_rate to 40250

Here is the tail of /var/log/syslog:

Oct 9 16:01:14 LINUX systemd[1]: Started Run anacron jobs.
Oct 9 16:01:14 LINUX anacron[8154]: Anacron 2.3 started on 2018-10-09
Oct 9 16:01:14 LINUX anacron[8154]: Normal exit (0 jobs run)
Oct 9 16:01:41 LINUX dbus-daemon[751]: [system] Activating via systemd: service name='org.freedesktop.hostname1' unit='dbus-org.freedesktop.hostname1.service' requested by ':1.87' (uid=1000 pid=1379 comm="/opt/google/chrome/chrome " label="unconfined")
Oct 9 16:01:41 LINUX systemd[1]: Starting Hostname Service...
Oct 9 16:01:42 LINUX dbus-daemon[751]: [system] Successfully activated service 'org.freedesktop.hostname1'
Oct 9 16:01:42 LINUX systemd[1]: Started Hostname Service.
Oct 9 16:01:43 LINUX gvfsd[1116]: mkdir failed on directory /var/cache/samba: Permission denied

What other information can I provide?

[ԜаӀtеr Ⅼарсһуnѕkі (wxl)]

Still having these issues? What specific steps to reproduce?

[Ilya Ig. Petrov (ilyaigpetrov)]

Doesn't happen anymore, the whole bug may be deleted for privacy benefits.