stacktrace tests fail when systemd-coredump is enabled

[floppym]

When systemd-coredump is enabled, the stacktrace tests fail since core dumps are not saved in the current working directory.

% cat /proc/sys/kernel/core_pattern
|/lib/systemd/systemd-coredump %P %u %g %s %t %c %h %e

https://www.freedesktop.org/software/systemd/man/systemd-coredump.html

test-output.txt