Subject: bug#39149: 27.0.50; describe-buffer-bindings is calling :filter function in wrong buffer

From: Lars Ingebrigtsen <[email-masked]>
Date: Fri, 30 Oct 2020 15:23:09 +0100

yyoncho <[email-masked]> writes:

> To reproduce (eval in scratch buffer)
> (define-key global-map (kbd "C-c C-l r") 
>   `(menu-item "2" switch-to-buffer
>               :filter ,(lambda (cmd)
>                          (print (format "Called in %s" (current-buffer)))
>                          cmd)))
> (with-temp-buffer
>   (with-output-to-string
>     (describe-buffer-bindings (get-buffer "*scratch*") [3 12] t)))
>
> This outputs:
>
> \"Called in  *temp*\"

I tried this recipe, but I'm not getting the :filter function called at
all.  Do you have a recipe, starting from "emacs -Q", that reproduces
this bug?

And your report didn't include the data about the version generated by
report-emacs-bug, so it's hard to guess whether bug is only on some
specific system.

-- 
(domestic pets only, the antidote for overdose, milk.)
   bloggy blog: http://lars.ingebrigtsen.no