bug#52055: 29.0.50; emoji-insert garbles terminal display on tsdh-dark theme

[Eli Zaretskii]

> From: bird <birdsite@airmail.cc>
> Date: Tue, 23 Nov 2021 10:29:14 +0000
> Cc: bird <birdsite@airmail.cc>
> 
> The display of emacs becomes weird when using emoji-insert on a terminal
> emulator.
> 
> To reproduce:
> emacs -Q -nw
> M-x customize-themes
> select tsdh-dark and return to *scratch* buffer
> M-x emoji-insert (this should already show some problems)
> select smileys (s) (it's garbled even more)
> 
> I can reproduce this with st terminal with lucid toolkit.

I suspect that the terminal emulator does things that Emacs doesn't
expect.  There's an entry in etc/PROBLEMS about problematic behavior
of another emulator (search for "Kitty"): perhaps yours does something
similar?  First thing to try is to disable auto-composition-mode.

If nothing helps, please post screenshots showing the problematic
display.