On 8/19/21 5:59 PM, Kaz Kylheku wrote:
This reproduces on grep 3.1 on Ubuntu.
That's a pretty old version of grep. I cannot reproduce the problem on Ubuntu 21.04, which has grep 3.6. So it sounds like the bug is fixed, and you can fix your problem by upgrading to a more-recent Ubuntu version.
(Not that anyone would ever want to *use* plain "grep -f -", except perhaps to file bug reports....)
