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

From: Eli Zaretskii <[email-masked]>
Date: Sun, 15 Nov 2020 17:15:57 +0200

> From: Stefan Kangas <[email-masked]>
> Date: Sat, 14 Nov 2020 16:24:07 -0800
> Cc: [email-masked]
> 
> a) Add a new argument to describe-map with the original buffer.  Ensure
>    that the :filter function is run there.
> 
> b) Change describe-map to return its output as a string.

Unless I'm missing something, b) would be a backward-incompatible
change, so I don't think we should consider it.

If adding an argument is deemed not a good idea, how about binding a
special variable to convey that information to
describe-buffer-bindings?