Figure out what killed an app (rhbz#2253099)

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	Hi,
I tried to investigate a rawhide bug:
https://bugzilla.redhat.com/show_bug.cgi?id=2253099
which is about Evolution being killed "by something". That's the thing,
I do not know what killed it, thus even why it had been killed. It's
even not killed after certain steps, it's killed "randomly", on various
occasions.

I did search the internet, but they usually expect the killer is the
OOM service, which logs about the action either in the dmesg or in the
journal, but in this case there is no sign about whom killed it in
either of these logs.

The evolution terminal just says:

   Killed

and the `dmesg | grep -i kill` only shows:

   [    3.435200] systemd[1]: Listening on systemd-oomd.socket - Userspace
                              Out-Of-Memory (OOM) Killer Socket.
   [    6.051242] rfkill: input handler disabled
   [   22.579276] rfkill: input handler enabled
   [   23.539350] rfkill: input handler disabled

and `journalctl -xb | grep -i kill` doesn't reveal anything useful. The
`journalctl -xb | grep -i evolution` has as its last line:

   Jan 31 10:49:22 localhost.localdomain rtkit-daemon[826]:
   Successfully made thread 4820 of process 4640 (/usr/bin/evolution)
   owned by '1000' RT at priority 5.

which does not explain anything. Grepping for the 4640 (evo's PID)
didn't show anything either.

That being said, is there a way to figure out what killed the app,
please?

	Thanks and bye,
	Milan

P.S.: the above-pasted journalctl line is followed by these three,
which look suspicious, but maybe they are unrelated. I even do not know
whether they had been added immediately after the app was killed or
before it. At least the terminal should not matter, because evo is
killed when being started from the GUI too. Three log lines follow:

Jan 31 10:49:23 localhost.localdomain xdg-desktop-por[2697]: Realtime
error: Could not map pid: Could not determine pid namespace: Could not
find instance-id in process's /.flatpak-info

Jan 31 10:50:46 localhost.localdomain gnome-terminal-[2939]: void
terminal_screen_shell_preexec(VteTerminal*): assertion
 '!priv->between_preexec_and_precmd' failed

Jan 31 10:50:49 localhost.localdomain gnome-terminal-[2939]: void
terminal_screen_shell_preexec(VteTerminal*): assertion
 '!priv->between_preexec_and_precmd' failed
--
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