Subject: bug#79159: [PATCH] Do not display in the tab line tabs that are excluded.

From: Eli Zaretskii <[email-masked]>
Date: Mon, 11 Aug 2025 05:25:23 +0300

> From: Juri Linkov <[email-masked]>
> Cc: [email-masked],  Eli Zaretskii <[email-masked]>
> Date: Sun, 10 Aug 2025 21:35:35 +0300
> 
> > +(defvar tab-line-tabs-window-buffers-filter-function
> > +  #'tab-line-tabs-window-buffers-filter-default
> > +  "Filter which buffers should be displayed in the tab line.")
> 
> Shouldn't this be defcustom?  Then you can add a const 'identity'
> to allow keeping excluded buffers.

Didn't you say that keeping them produces buggy behavior?  If so, why
would we tempt users to produce bugs?