GNU bug report logs - #79159
[PATCH] Do not display in the tab line tabs that are excluded.

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From: Juri Linkov <juri <at> linkov.net>
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: 79159 <at> debbugs.gnu.org, eg642616 <at> gmail.com
Subject: bug#79159: [PATCH] Do not display in the tab line tabs that are excluded.
Date: Tue, 05 Aug 2025 20:32:06 +0300

>> 1. M-x global-tab-line-mode RET
>> 2. C-x b foo RET
>> 3. C-x b SPC *bar* RET
>> 4. C-x <left>
>>    Now the buffer name " *bar*" is visible on the tab-line.
>> 5. C-x <left>
>>    But now " *bar*" suddenly goes away.
>> 
>> This is because handling of excluded buffers is hard-coded
>> in many window.el functions.
>> 
>> So not showing excluded buffers by default will avoid this snag.
>
> If there are bugs with handling excluded buffers, I hope we can fix
> them, instead of leaving them hidden behind a user option.  People who
> will use that option will see those bugs exactly as all of the users
> see them today, and they _will_ complain.
>
> OTOH, since no one has yet complained about those bugs, perhaps
> leaving this behavior be the default is not such a bad idea?

Not bugs, just unexpected inconsistencies.  window.el doesn't
permit excluded buffers to exist in the window-prev-buffers list
that is used for tab-line.  No one complained about this problem
because it's very difficult to notice it: one moment there is
an excluded buffer on the tab-line, and the next moment it disappears.

Not showing such buffers by default will fix this inconsistency.

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