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bug#26932: Found the triggering behaviour
From: |
Lars Ingebrigtsen |
Subject: |
bug#26932: Found the triggering behaviour |
Date: |
Wed, 23 Oct 2019 12:02:21 +0200 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/27.0.50 (gnu/linux) |
Vivek Dasmohapatra <vivek@etla.org> writes:
> The old code in lui.el used to (effectively) do this:
>
> (setq buffer-undo-list (mapcar a-lambda-here buffer-undo-list))
>
> This seemed to cause some strings in the undo list structure to get
> freed to early, then freed again later.
>
> The altered code uses the approach of setf'ing the relevant elements of
> the undo-list, which doesn't trick the GC code into a premature free.
>
> Since there's a workaround it's not particularly urgent, but it seems
> to me that there's a hole in the GC logic somewhere.
If I understand correctly, the external lui package set buffer-undo-list
to something invalid, and this led Emacs to segfault when gc-ing?
Was there any further work done here, or a reproducible test case
written?
--
(domestic pets only, the antidote for overdose, milk.)
bloggy blog: http://lars.ingebrigtsen.no
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Lars Ingebrigtsen <=