GNU bug report logs - #79200
31.0.50; Duplicated elements for '#<marker at' in buffer-undo-list

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From: Eli Zaretskii <eliz <at> gnu.org>
To: Alan Mackenzie <acm <at> muc.de>
Cc: pipcet <at> protonmail.com, gerd.moellmann <at> gmail.com, oscarfv <at> eclipso.eu, monnier <at> iro.umontreal.ca, acm <at> muc.de, 79200 <at> debbugs.gnu.org
Subject: bug#79200: 31.0.50; Duplicated elements for '#<marker at' in buffer-undo-list
Date: Mon, 11 Aug 2025 19:20:43 +0300

> Cc: Gerd Möllmann <gerd.moellmann <at> gmail.com>,
>  Óscar Fuentes <oscarfv <at> eclipso.eu>, acm <at> muc.de,
>  Stefan Monnier <monnier <at> iro.umontreal.ca>, 79200 <at> debbugs.gnu.org
> Date: Mon, 11 Aug 2025 15:48:13 +0000
> From: Alan Mackenzie <acm <at> muc.de>
> 
> Fread_from_minibuffer just calls read_minibuf.  By perusing the source,
> it seems that two of the three repeating markers are created in
> save_window_save, called from Fcurrent_window_configuration (which is
> called from read_minibuf).
> 
> With a bit of refactoring, we could arrange for (at least) two of these
> three regularly created markers to be nullified.  This would be tedious
> rather than difficult.

Why aren't they collected by GC?

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