sys-block/fio-3.16 contains the strange line strncpy(message, sizeof(message), "%s", status_message); at gclient.c:333 This is an invalid invocation of strncpy and there is no private definition of that name either.
This author has fixed this already in fio-git-20191107082503 Adding sed -i -e's/strncpy/snprintf/' gclient.c to src-prepare applies this fix.
duping to newer bug as the issue was triaged & fixed there. thanks for the report. *** This bug has been marked as a duplicate of bug 699878 ***