Core dumps are great, especially for the occasional odd bug that occurs only in long running processes. However, the ridiculous systemd default of attempting and failing to capture the kernel core dump into the binary journal completely ruins this. Only small, uninteresting core dumps are ever captured; large ones are silently discarded because the journal is not allowed to grow that big.
Yeah, when I'm crashing and want to keep cores, I'll temporarily modify /proc/sys/kernel/core_pattern to prevent systemd from eating them. I sometimes want them suppressed, sometimes want them written out, and never want them to go to systemd.
