bug#77732: grep-edit-buffer errors with incionsistent behaviour

[Eli Zaretskii]

> From: "Paul D. Nelson" <ultrono@gmail.com>
> Cc: visuweshm@gmail.com, johann.hoechtl@gmail.com, 77732@debbugs.gnu.org
> Date: Sun, 13 Apr 2025 10:01:25 +0200
> 
> Here's a reliable recipe that produces what I suspect is the key issue:
> 
> ----------------------------------------
> emacs -Q
> 
> Disable global-font-lock-mode.
> 
> Use rgrep in any situation that returns some match.  (The emacs source
> tree works, as does a dummy folder containing "test.txt" with a single
> line "foo".)
> 
> In the *grep* buffer, press n.
> ----------------------------------------
> 
> After this, the line "Grep finished ..." has the compilation-message
> text property, which should not happen.
> 
> The erroneous property gets added in compilation-parse-errors in the
> final "add-text-properties", apparently because the regexp used to
> detect matches picks up the "Grep finished..." line.

Thanks, but can you be more specific?  Which regexp is that, and why
does it match "Grep finished..." only sometimes?