I use graphical Emacs, so this may be pilot error or some external issue I'm mistaking for an Emacs one. Steps to reproduce: - 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: ~$ env | grep -i term COLORTERM=truecolor GNOME_TERMINAL_SCREEN=/org/gnome/Terminal/screen/06526de0_c54d_497a_b95f_7e039a886d02 TERM=xterm-256color GNOME_TERMINAL_SERVICE=:1.95 ~$ uname -r 5.10.0-16-amd64 ~$ cat /etc/os-release PRETTY_NAME="Debian GNU/Linux 11 (bullseye)" NAME="Debian GNU/Linux" VERSION_ID="11" VERSION="11 (bullseye)" VERSION_CODENAME=bullseye ID=debian HOME_URL="https://www.debian.org/"; SUPPORT_URL="https://www.debian.org/support"; BUG_REPORT_URL="https://bugs.debian.org/"; [1] https://builder.libguestfs.org/index.asc In GNU Emacs 29.0.50 (build 1, x86_64-pc-linux-gnu) of 2022-08-03 built on debianbullseye Repository revision: 4f3e95bed523be11f3be7b791c6ae909ffa77a8d Repository branch: master System Description: Debian GNU/Linux 11 (bullseye) Configured using: 'configure --without-x' Configured features: ACL DBUS GMP GNUTLS MODULES NOTIFY INOTIFY PDUMPER SECCOMP SOUND THREADS Important settings: value of $LANG: en_US.UTF-8 value of $XMODIFIERS: @im=ibus locale-coding-system: utf-8-unix Major mode: Lisp Interaction Minor modes in effect: tooltip-mode: t global-eldoc-mode: t eldoc-mode: t show-paren-mode: t electric-indent-mode: t menu-bar-mode: t file-name-shadow-mode: t global-font-lock-mode: t font-lock-mode: t blink-cursor-mode: t line-number-mode: t indent-tabs-mode: t transient-mark-mode: t auto-composition-mode: t auto-encryption-mode: t auto-compression-mode: t Load-path shadows: None found. Features: (shadow sort mail-extr emacsbug message mailcap yank-media puny dired dnd dired-loaddefs rfc822 mml mml-sec password-cache epa derived epg rfc6068 epg-config gnus-util text-property-search time-date subr-x mm-decode mm-bodies mm-encode mail-parse rfc2231 mailabbrev gmm-utils mailheader cl-loaddefs cl-lib sendmail rfc2047 rfc2045 ietf-drums mm-util mail-prsvr mail-utils term/xterm xterm byte-opt gv bytecomp byte-compile cconv regexp-opt rmc iso-transl tooltip eldoc paren electric uniquify ediff-hook vc-hooks lisp-float-type elisp-mode tabulated-list replace newcomment text-mode lisp-mode prog-mode register page tab-bar menu-bar rfn-eshadow isearch easymenu timer select mouse jit-lock font-lock syntax font-core term/tty-colors frame minibuffer nadvice seq simple cl-generic indonesian philippine cham georgian utf-8-lang misc-lang vietnamese tibetan thai tai-viet lao korean japanese eucjp-ms cp51932 hebrew greek romanian slovak czech european ethiopic indian cyrillic chinese composite emoji-zwj charscript charprop case-table epa-hook jka-cmpr-hook help abbrev obarray oclosure cl-preloaded button loaddefs faces cus-face macroexp files window text-properties overlay sha1 md5 base64 format env code-pages mule custom widget keymap hashtable-print-readable backquote threads dbusbind inotify multi-tty make-network-process emacs) Memory information: ((conses 16 47267 10255) (symbols 48 5661 0) (strings 32 15261 1789) (string-bytes 1 495339) (vectors 16 8381) (vector-slots 8 102650 6988) (floats 8 24 36) (intervals 56 181 12) (buffers 992 10))
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