run top -sH and console continually updates. should return an error.
A commit references this bug: Author: eadler Date: Wed Aug 22 09:49:38 UTC 2018 New revision: 338187 URL: https://svnweb.freebsd.org/changeset/base/338187 Log: top(1): issue warning on invalid delay When top -sH is run it continually updates. It should issue an warning instead. Reported by: jmg PR: 230803 Changes: head/usr.bin/top/top.c