I try the Emacs build in commit 780f674a82a90c4e3e32583059b498bfa57e4a06. When I eval (set-frame-font "Sarasa Mono Slab SC" t) then run M-x view-hello-file. Emacs segfault. Sarasa Gothic: https://github.com/be5invis/Sarasa-Gothic GDB attached backtrace in attachment. In GNU Emacs 28.0.50 (build 1, x86_64-pc-linux-gnu, GTK+ Version 3.24.14, cairo version 1.16.0) Windowing system distributor 'The X.Org Foundation', version 11.0.12008000 System Description: Arch Linux Recent messages: For information about GNU Emacs and the GNU system, type C-h C-a. Making completion list... Configured using:  'configure  CONFIG_SHELL=/gnu/store/pwcp239kjf7lnj5i4lkdzcfcxwcfyk72-bash-minimal-5.0.16/bin/bash  SHELL=/gnu/store/pwcp239kjf7lnj5i4lkdzcfcxwcfyk72-bash-minimal-5.0.16/bin/bash  --prefix=/gnu/store/18644azvqlk7kn7i7cfl5z9w5535l0dg-emacs-git-28.0.50-0.780f674  --enable-fast-install --with-harfbuzz --with-modules  --disable-build-details' Configured features: XPM JPEG TIFF GIF PNG RSVG CAIRO SOUND DBUS GSETTINGS GLIB NOTIFY INOTIFY ACL LIBSELINUX GNUTLS LIBXML2 FREETYPE HARFBUZZ M17N_FLT LIBOTF ZLIB TOOLKIT_SCROLL_BARS GTK3 X11 XDBE XIM MODULES THREADS JSON PDUMPER GMP Important settings:   value of $EMACSLOADPATH: /home/chino/.guix-profile/share/emacs/site-lisp:/home/chino/.guix-profile/share/emacs/28.0.50/lisp   value of $LC_CTYPE: en_US.UTF-8   value of $LANG: zh_CN.UTF-8   value of $XMODIFIERS: @im=fcitx   locale-coding-system: utf-8-unix Memory information: ((conses 16 47059 5207)  (symbols 48 5994 1)  (strings 32 16196 1908)  (string-bytes 1 527713)  (vectors 16 10973)  (vector-slots 8 134648 8501)  (floats 8 19 34)  (intervals 56 226 0)  (buffers 992 12)) -- Zihao