On Sun, 12 May 2019 at 10:14, L A Walsh <b...@tlinx.org> wrote: > Is it documented somewhere that bash's minimal config is POSIX compliant? > I'm not sure, off hand. Not sure either. The docs say: "This produces a shell with minimal features, close to the historical Bourne shell" and https://www.gnu.org/software/bash/manual/html_node/Bash-POSIX-Mode.html#Bash-POSIX-Mode explicitly mentions that all that is needed is renaming 'bash' to 'sh' to make it POSIX compliant (what has been done in my case).
Anyway, good news for grep is that this is not a grep bug (bashism). I have found out that this is a regression in the bash project: it has stopped working since bash-4.3.0. -- http://mikro.atari.org
