Subject: bug#31062: 26.0.91; warning on UTF-8 encoding of unibyte text

From: Lars Ingebrigtsen <[email-masked]>
Date: Thu, 02 Sep 2021 10:52:35 +0200

[email-masked] (Charles A. Roelli) writes:

> (This test case assumes a locale-coding-system of utf-8-unix, and
> LANG: en_GB.UTF-8 or anything similar.)
>
> emacs -q
> C-x b test RET
> M-: (insert-byte 195 1) RET
> M-: (insert-byte 188 1) RET	> buffer text should look like \303\274
> C-x C-s /tmp/foo RET		> the path is irrelevant
>
> There's this warning:
>
> These default coding systems were tried to encode text
> in the buffer ‘test’:
>   (utf-8-unix (1 . 4194243) (2 . 4194236))
> However, each of them encountered characters it couldn’t encode:
>   utf-8-unix cannot encode these: \303 \274
>
> Is the text "(1 . 4194243) (2 . 4194236)" useful here?  It looks like
> it's there by accident.  If it is helpful, could someone please
> explain what it means?

I've now made this warning more readable (and informative) by formatting
it as a table, and saying what the data means in Emacs 28.

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