bug#81530: Problems with both replace-match and substring

Sean MacLennan [14/Aug  9:30am -04] wrote:
> On Fri, 14 Aug 2026 11:47:38 +0100
> Sean Whitton <[email protected]> wrote:
>
>> I mean, what is the claimed bug in upstream Emacs?
>
> The bug is why would replace-match and substring work differently on
> the same strings depending on the context. If you look at the program I
> attached to the original email, it is very simple. I can't think of how
> it could be causing this problem.
>
> It is frustrating that I cannot test it outside the program because it
> always works. But never works in place.

It seems unlikely there is an actual bug here.

If you are sure that there is, please provide a description of what it
would be that does not require reading and understanding your complete
project -- respectfully, we don't do user support on this list.

-- 
Sean Whitton