[mythtv-users] Inhibit crash dumps

[John]

MythTV Version : v31.0-38-ga2b8c262dc on Ubuntu 20.04

The frontend is working fine but crashing on exit. This occurs on one of 
my frontends but not others.

mythshutdown also core dumps on exit when running on my Ubuntu 19.10 server.

Both work fine but on one of my frontends it keeps creating a large core 
dump file in /var/crash

ie /var/crash/usr_bin_mythfrontend.real.1000.crash

Does any body know how to stop the core dump files being created