On Fri, 01 Jun 2018 23:15:24 -0400
Sam Varshavchik wrote:

> On the machine where you do development work, and have to deal with core  
> dumps all the time, you can rig this to be done automatically during the  
> boot, and completely avoid having to deal with all that brain damage.

Permanently go back to the "old" way:

cat 'kernel.core_pattern = core' >> /etc/sysctl.conf

Also, I can't tell if it is still screwed up or not because
the bugzilla about it is incomprehensible, but you may
also need to edit /etc/systemd/system.conf and set

DefaultLimitCORE=0:infinity

At one time, this changed so that ulimit was always set for
everyone to always dump core (in the previous reality
you had to use ulimit -c to enable core dumps when you
knew you wanted them). This changed default then left core
files scattered all over your system.
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