This appears to be due to column(1) going insane when trying to
parse the output in /etc/security; running the offending command under
gdb gives me the following:
248                             (void)printf("%s%*s", t->list[coloff],
249                                 lens[coloff] - t->len[coloff] + 2, " ");

(gdb) print lens[coloff]
$5 = 757953069

"oops."

This appears to have been caused by the -r1.15 revision of column.c,
which changed to the libutil versions of emalloc/erealloc/estrdup.
Trying to figure out how to fix it now.