GNU bug report logs - #67715
28.2; Minibuffer content is sometimes unexpectedly partially hidden

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From: Eli Zaretskii <eliz <at> gnu.org>
To: acm <at> muc.de, Markus Triska <triska <at> metalevel.at>
Cc: 67715 <at> debbugs.gnu.org
Subject: bug#67715: 28.2; Minibuffer content is sometimes unexpectedly partially hidden
Date: Sat, 22 Feb 2025 11:23:32 +0200

Alan, any further comments or suggestions?

> From: Markus Triska <triska <at> metalevel.at>
> Cc: Alan Mackenzie <acm <at> muc.de>,  67715 <at> debbugs.gnu.org
> Date: Sat, 08 Feb 2025 13:11:40 +0100
> 
> Dear Eli, Alan,
> 
> Eli Zaretskii <eliz <at> gnu.org> writes:
> 
> > Ping!  Markus, can you please answer Alan's question?
> 
> Yes of course, please forgive the late reply, I tried to find out more
> about the issue in the meantime:
> 
> First: Yes exactly, the issue is exactly about inserting text in the
> minibuffer, and the minibuffer no longer resizing. I posted a test case
> for this regression in this issue. As mentioned, I need this feature to
> demonstrate certain functionalities of Emacs, where I programmatically
> insert larger text in the minibuffer so that it is better visible, and
> this unfortunately now no longer works.
> 
> Second, I believe this present issue is closed at least partially for a
> wrong reason (in the sense that the given reason alone does not by
> itself justify the change): The reason given was that "The change which
> caused this cannot be reverted, since it will reintroduce a worse bug
> (bug#24285).". However, the commit which causes the issue I described
> attempts to address #55412 (not #24285). What I described works as
> expected until Emacs 28.1, and stopped working only much more recently,
> as of Emacs 28.2 due to commit dfa3e6f424b20fe27d9041b2ce7d69811df5d8cd.
> 
> This commit changes 3 files: frame.c, minibuf.c and xdisp.c.
> 
> As of Emacs 29.4, the commit can no longer be directly reverted. To find
> out more about the issue and what exactly causes it, I have therefore
> produced a patch that can be used to revert the commit that cleanly
> applies to Emacs 29.4 and can be tested with more recent Emacs versions:
> 
>     https://www.metalevel.at/ei/minibuffer.patch
> 
> The patch reverts the changes of all 3 files, and restores the behaviour
> I get with Emacs versions before the commit was applied.
> 
> Considering this patch:
> 
> 1) if I apply exactly the change (i.e., the reversion) that affects
>    frame.c, then the test case I posted works exactly as expected,
>    i.e., as with Emacs versions 28.1 and before.
> 
> 2) if I apply exactly the change that affects minibuf.c, then the
>    problem I described in the present issue (#67715) still occurs.
> 
> 3) if I apply exactly the change that affects xdisp.c, then the problem
>    I described in this issue also still occurs.
> 
> In a sense, it seems to be the change to frame.c that causes the issue I
> described.
> 
> In the discussion of #55412, there were significant reservations against
> this commit raised by Martin, which may also be worth considering:
> 
>     https://debbugs.gnu.org/cgi/bugreport.cgi?bug=55412#74
> 
> I hope this helps. Please let me know any time if you have any remaining
> questions.
> 
> Thank you and all the best,
> Markus
> 

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