I got this when running meld remotely: minas-tirith:~ # meld /etc/pam.d/login.rpmnew /etc/pam.d/login Trace/breakpoint trap (core dumped) minas-tirith:~ # meld /etc/pam.d/login.rpmnew /etc/pam.d/login minas-tirith:~ # It is a trace or breakpoint, I suppose created by the devs to check on some condition. minas-tirith:~ # tail -n 15 /var/log/messages <3.6> 2018-11-19 13:18:21 minas-tirith systemd 1 - - Started Hostname Service. <0.4> 2018-11-19 13:18:54 minas-tirith kernel - - - [ 6360.579084] do_trap: 37 callbacks suppressed <0.6> 2018-11-19 13:18:54 minas-tirith kernel - - - [ 6360.579087] traps: meld[5660] trap int3 ip:7fe323acf981 sp:7ffda9d5a270 error:0 in libglib-2.0.so.0.5400.3[7fe323a7c000+114000] <3.6> 2018-11-19 13:18:54 minas-tirith systemd 1 - - Created slice system-systemd\x2dcoredump.slice. <3.6> 2018-11-19 13:18:54 minas-tirith systemd 1 - - Started Process Core Dump (PID 5669/UID 0). <1.2> 2018-11-19 13:18:54 minas-tirith systemd-coredump 5670 - - Process 5660 (meld) of user 0 dumped core. Only once. is this worth a bug report? -- Cheers / Saludos, Carlos E. R. (from 42.3 x86_64 "Malachite" at Telcontar)