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bug#42366: UTF8 QR codes vs. emacs

From: Lars Ingebrigtsen
Subject: bug#42366: UTF8 QR codes vs. emacs
Date: Wed, 05 Aug 2020 12:26:55 +0200
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/28.0.50 (gnu/linux)

積丹尼 Dan Jacobson <jidanni@jidanni.org> writes:

> Compare how
> $ qrencode -t UTF8 x
> looks in
> $ emacs -nw -f shell # vs.
> $ emacs     -f shell
> As you can see in the latter it is quite mangled,
> perhaps beyond machine recognition.

It's not good in any case, really.  Here's the X version:

PNG image

Note the horizontal lines -- it should be a solid white field.

And with -nw it's just a complete mess:

PNG image

I guess...  it's translating all the Unicode characters instead of just
letting the terminal render them?  The terminal does have these
characters; when running the program directly in the shell everything
works fine.

Does anybody know how to make shell-mode (under -nw) just output the

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

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