On Mon, 12 Jun 2017 15:02:50 -0700
Samuel Sieb wrote:

> Did you check out "man core"?  Did you look in journalctl to see if abrt 
> was putting them somewhere?  Did you search about 
> "/proc/sys/kernel/core_pattern"?

I don't know if or when they fixed it, but at some point
systemd also squashed core files in /etc/systemd/system.conf
by changing DefaultLimitCORE. They made it impossible
for a user to run "ulimit -c unlimited". I had to set:

DefaultLimitCORE=0:infinity

to make it possible to change my ulimit in a user session.

My complete set of changes I now make to my system to restore
traditional core file behavior is:

systemctl list-unit-files | fgrep abrt

Then do a

systemctl mask whatever.service

for all the "whatever"s that fgrep found

edit /etc/sysctl.conf add as last line
kernel.core_pattern = core

edit /etc/systemd/system.conf and set
DefaultLimitCORE=0:infinity

reboot system and you should now get "normal" core files.
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