bug#65198: 29.1; Emacs29.1 crash in function face_for_font

[Eli Zaretskii <eliz@gnu.org>]

> From: 张云峰 <zhangyunfeng0101@gmail.com>
> Date: Thu, 10 Aug 2023 22:56:23 +0800
> 
> finally  I fix this bug by removing a piece of code:
> 
> (defun +set-chinese-font()
>   (interactive)
>   (set-fontset-font
>    t
>    'han
>    (cond
>     ((string-equal system-type "windows-nt")
>      (cond
>       ((member "Microsoft YaHei" (font-family-list)) "Microsoft YaHei")
>       ((member "Microsoft JhengHei" (font-family-list)) "Microsoft JhengHei")
>       ((member "SimHei" (font-family-list)) "SimHei")))
>     ((string-equal system-type "darwin")
>      (cond
>       ((member "Hei" (font-family-list)) "Hei")
>       ((member "Heiti SC" (font-family-list)) "Heiti SC")
>       ((member "Heiti TC" (font-family-list)) "Heiti TC")))
>     ((string-equal system-type "gnu/linux")
>      (cond
>       ((member "WenQuanYi Micro Hei" (font-family-list)) "WenQuanYi
> Micro Hei"))))))
> 
> (add-hook 'buffer-list-update-hook '+set-chinese-font)

I guess one of these fonts is faulty in some way?  Or maybe you have
neither of these fonts on that system, which would effectively specify
that characters of the han script have no font at all?  Of course,
normally the latter should just cause the han characters to display as
hex codes, not to cause crashes...

Are you saying that just having the above in your customization and
typing some Han character causes Emacs to crash?

P.S. And please use Reply All to reply, so that the bug address is
kept on the CC list.