bug#50207: 28.0.50; ansi-color-compilation-filter and rgrep

[Basil L. Contovounesios]

Basil L. Contovounesios [2021-08-26 12:10 +0100] wrote:

> I can reproduce the issue in Emacs 25.1 and newer, but not in 24.5
> (configuration below signature), with the following modified recipe:
>
> 0. emacs -Q
> 1. (add-hook 'compilation-filter-hook
>              (lambda ()
>                (ansi-color-apply-on-region compilation-filter-start
>                                            (point))))
> 2. C-x C-e
> 3. M-x rgrep RET
> 4. setq RET RET /dir/of/emacs/trunk RET
> 5. ...twiddle thumbs...
> 6. C-c C-k
>
> Loading the 24.5 versions of ansi-color.el and compile.el in 25.1
> between steps 0 and 1 does not seem to change anything.

Which makes sense, because the highlighting bisects to the following
change in grep.el:

Don't assume 'grep' supports GREP_OPTIONS.
2e4c2fe278 2014-09-16 17:07:12 -0700
https://git.sv.gnu.org/cgit/emacs.git/commit/?id=2e4c2fe2787785a421f256541de642976e9bd90b

-- 
Basil