Your message dated Thu, 2 Jan 2020 01:04:21 -0800 with message-id and subject line grep -vf <() filters all rows has caused the debbugs.gnu.org bug report #33972, regarding grep -vf <() filters all rows to be marked as done. (If you believe you have received this mail in error, please contact help-debbugs@gnu.org.) -- 33972: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=33972 GNU Bug Tracking System Contact help-debbugs@gnu.org with problems