On Sat, Mar 05, 2022 at 09:26:06AM +0300, lvm wrote:
>  The identical /etc/skel/.bashrc and /etc/defaults/etc/skel/.bashrc contain
> the same line
> 
> # export HISTCONTROL=$HISTCONTROL${HISTCONTROL+,}ignoredups
> 
> But HISTCONTROL values should be colon separated, not comma separated. This
> line is commented out, but if someone like me tries to use it without much
> thinking...

Confirmed.

Achim, I've attached a patch that should fix this, based on the tip of
https://sourceware.org/git/cygwin-apps/base-files.git

HTH

Adam