bug#18444: 24.3.93; Error running timer 'compilation-auto-jump' from grep-mode

[Stefan Monnier]

> I see the following ways to solve this:
> - Following RMS initial idea, use a text property to mark text which
>   should not be parsed for errors.
> - Use buffer-local-variables to remember where the actual
>   compilation/grep output starts and ends, and use that as an
>   lower/upper bound when calling `compilation--parse-region' in
>   `compilation--ensure-parse'.

Text properties seem more elegant than buffer-local vars.

> Whatever we do to fix it, I'm leaning towards doing this in trunk.

Sounds OK, yes.  IIUC this is not a new bug.

We could add a quick-hack/workaround in emacs-24, but only if it's very
straightforward&safe.


        Stefan