Per https://man.freebsd.org/cgi/man.cgi?query=setrlimit, FreeBSD's `setrlimit` seems to limit the number of processes, not threads via `RLIMIT_NPROC`. So this test should be XFAIL for FreeBSD.
Per https://man.freebsd.org/cgi/man.cgi?query=setrlimit, FreeBSD's `setrlimit` seems to limit the number of processes, not threads via `RLIMIT_NPROC`. So this test should be XFAIL for FreeBSD.