GNU bug report logs - #72692
Emacs 31.05 (40eecd594ac) get SIGSEGV on Linux (Linux 6.6.45 Kde Wayland)

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Message #68 received at 72692 <at> debbugs.gnu.org (full text, mbox):

From: Pip Cet <pipcet <at> protonmail.com>
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: execvy <at> gmail.com, 72692 <at> debbugs.gnu.org
Subject: Re: bug#72692: Emacs 31.05 (40eecd594ac) get SIGSEGV on Linux (Linux
 6.6.45 Kde Wayland)
Date: Mon, 19 Aug 2024 06:07:35 +0000

"Eli Zaretskii" <eliz <at> gnu.org> writes:

>> Date: Sun, 18 Aug 2024 14:59:51 +0000
>> From: Pip Cet <pipcet <at> protonmail.com>
>> Cc: execvy <at> gmail.com, 72692 <at> debbugs.gnu.org
>>
>> >> I was under the impression two faces could share the same fontset.  That
>> >> certainly is what my debugging sessions so far indicate.  Maybe that's
>> >> the bug?
>> >
>> > We are talking about a fontset identified by face->fontset.  AFAIU,
>> > face->fontset is only non-negative for so-called "ASCII faces".
>>
>> Not what I'm seeing. base_face->fontset is copied into the new face by
>> realize_non_ascii_face.
>
> Where do you see this copying in realize_non_ascii_face?

static struct face *
realize_non_ascii_face (struct frame *f, Lisp_Object font_object,
			struct face *base_face)
{
  struct face_cache *cache = FRAME_FACE_CACHE (f);
  struct face *face;

  face = xmalloc (sizeof *face);
  *face = *base_face;
        ^____ here

(The entire structure is copied, and fontset isn't explicitly changed
afterwards).

Pip

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