Hello Jörg, just a suspicion, but the "trap" might point to a intentional process exit.
Is there something interesting near that trap line visible in "journalctl -e"? Otherwise if you have a coredump handler like e.g. systemd-coredump installed, these trap line should trigger a core to be collected. E.g. "cordumpctl list" should show then some and could be inspected by "coredumpctl gdb [pid]". Kind regards, Bernhard https://wiki.debian.org/HowToGetABacktrace#Core_dump
