Subject: bug#79200: 31.0.50; Duplicated elements for '#<marker at' in buffer-undo-list

From: Gerd Möllmann <[email-masked]>
Date: Sat, 09 Aug 2025 14:54:42 +0200

Óscar Fuentes Óscar Fuentes <[email-masked]> writes:

> Gerd Möllmann <[email-masked]> writes:
>
>>> Looks like the patch puts igc on the same footing as master wrt the
>>> required work to reproduce the problem.
>>
>> That's something, thanks to Pip!
>>
>> Can you determine if these are different markers (sxhash-eq)?
>
> Yes, sxhash-eq indicates that there are repeated markers, but not into
> the same sequence. Actually, the sequences themselves are repeated:
>
> (this is on igc with Pip's patch applied, but without reverting the
> commit I identified)

Thanks. If they are not in the same group then trying to coalesce
entries is not worth it, I think.

Maybe another case like that of the mode-line. Without something rr
pretty hard to debug (no rr on macOS :-/).