From: Eli Zaretskii <eliz@gnu.org>
To: "J.P." <jp@neverwas.me>
Cc: 56952@debbugs.gnu.org
Subject: bug#56952: 29.0.50; Emoji skin-tone modifiers disrupt terminal output
Date: Wed, 03 Aug 2022 17:28:06 +0300 [thread overview]
Message-ID: <8335ed5rm1.fsf@gnu.org> (raw)
In-Reply-To: <87a68l1m1b.fsf@neverwas.me> (jp@neverwas.me)
> From: "J.P." <jp@neverwas.me>
> Date: Wed, 03 Aug 2022 06:42:08 -0700
>
> - emacs -Q -nw
> - In *scratch*, M-:
>
> (dotimes (_ 10) (insert ";; \U0001f9dc\U0001f3fc 12345\n\n\n\n\n\n"))
>
> - Make entire buffer the active region (put mark at BOB and point at EOB)
> - Scroll down (M-v) once or twice
> - Gaps appear in the mode line and visual artifacts elsewhere
>
> AFAICT, the two inserted characters can be any valid emoji/modifier
> combination. Additional leading or trailing emojis (or other characters,
> like ZWJ \u200d or VS-16 \ufe0f) don't seem to affect the result.
>
> This was initially noticed on an Alacritty terminal emulator displaying
> a remote Emacs 28. The session in the screenshot below was run in a
> stock VM image [1] with only Emacs 29 installed:
On a TTY Emacs expects the terminal emulator to DTRT with composable
sequences. Some emulators don't, so you need to turn off
auto-composition-mode for those. (The value of auto-composition-mode
can be a string naming the terminal where to disable it
automatically.)
next prev parent reply other threads:[~2022-08-03 14:28 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-08-03 13:42 bug#56952: 29.0.50; Emoji skin-tone modifiers disrupt terminal output J.P.
2022-08-03 14:28 ` Eli Zaretskii [this message]
2022-08-03 19:42 ` J.P.
2022-08-04 5:28 ` Eli Zaretskii
2022-08-04 12:55 ` J.P.
2022-08-06 16:20 ` Eli Zaretskii
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