see https://www.lerctr.org/~ler/stack_crash.png between r349392 & r349395 is where the bug was introduced. my suspicion is https://svnweb.freebsd.org/changeset/base/349393 -- Larry Rosenman http://www.lerctr.org/~ler Phone: +1 214-642-9640 E-Mail: ler at lerctr.org US Mail: 5708 Sabbia Dr, Round Rock, TX 78665-2106