GNU bug report logs - #79311
31.0.50; Some characters not displayed when using standard-display-table

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From: Andy Moreton <andrewjmoreton <at> gmail.com>
To: 79311 <at> debbugs.gnu.org
Subject: bug#79311: 31.0.50; Some characters not displayed when using standard-display-table
Date: Mon, 25 Aug 2025 22:15:54 +0100

On Mon 25 Aug 2025, Eli Zaretskii wrote:

>> From: Matija Obid <matija.obid <at> posteo.net>
>> Date: Mon, 25 Aug 2025 16:07:46 +0000
>> 
>> Steps to reproduce:
>> $ emacs -Q
>> #+begin_src elisp
>> (setq standard-display-table (make-display-table))
>> (aset standard-display-table ?> [?\〉])
>> (switch-to-buffer ">")
>> #+end_src
>
>> 
>> The buffer name in modeline is displayed as a square instead of parenthesis.
>
> Thanks, should be fixed now.

This seems to cause display glitches in gnus on Windows, when using
non-ASCII chars for the indicators in gnus-sum-thread-tree-* variables.
These glitches did no occur in a build from two days ago.

The symptom is the gnus summary buffer displays \xe2 characters, instead
of the expected character, e.g. WHITE SQUARE (codepoint #x25a1) which
has buffer code #xE2 #x96 #xA1.

The wrong display is transient, in that moving the cursor over the wrong
display fixes the glitch.

    AndyM

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