all messages for Emacs-related lists mirrored at yhetil.org
 help / color / mirror / code / Atom feed
From: Eli Zaretskii <eliz@gnu.org>
To: Werner LEMBERG <wl@gnu.org>
Cc: 31316@debbugs.gnu.org
Subject: bug#31316: Emacs hangs in `font_open_entity'
Date: Mon, 30 Apr 2018 22:44:49 +0300	[thread overview]
Message-ID: <83wowoqy1a.fsf@gnu.org> (raw)
In-Reply-To: <20180430.192218.1552282367861674790.wl@gnu.org> (message from Werner LEMBERG on Mon, 30 Apr 2018 19:22:18 +0200 (CEST))

> Date: Mon, 30 Apr 2018 19:22:18 +0200 (CEST)
> Cc: 31316@debbugs.gnu.org
> From: Werner LEMBERG <wl@gnu.org>
> 
> >> If I call `emacs -Q' and load the attached file `testchar' with
> >> 
> >>   C-x RET c gb18030 C-x C-f testchar
> >> 
> >> Emacs hangs in `font_open_entity' on my GNU/Linux box:
> > 
> > Does the patch below solve this without introducing any new
> > problems?
> 
> Sort of, thanks.  After waiting a few seconds, Emacs now displays
> three characters, but navigation is hard: it takes a few seconds to
> move from character to character (I guess Emacs tries to reload the
> missing glyph again and again).

Well, maybe I went overboard with the 100 figure, and we should use a
much smaller number, like 10 or 20?

And anyway, some delays are better than an infloop, yes?

> >> Both `average_width' and `height' are always zero for `font'
> >> regardless of `psize'; this effectively makes the above code an
> >> endless loop.
> > 
> > What kind of strange font has both of these always zero?
> 
> If you tell me how to find out the name of the font Emacs tries to
> use, I can try to answer this question.

Put a breakpoint in the loop, and when it breaks, say

  (gdb) pp entity

(You will need to make sure src/.gdbinit in the Emacs tree is read by
GDB, before "pp" will work for you.)





  reply	other threads:[~2018-04-30 19:44 UTC|newest]

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-04-30  8:13 bug#31316: Emacs hangs in `font_open_entity' Werner LEMBERG
2018-04-30  8:16 ` Werner LEMBERG
2018-04-30 15:21 ` Eli Zaretskii
2018-04-30 17:22   ` Werner LEMBERG
2018-04-30 19:44     ` Eli Zaretskii [this message]
2018-04-30 20:20       ` Werner LEMBERG
2018-05-01 15:06         ` Eli Zaretskii
2018-05-05  8:55         ` Eli Zaretskii
2018-05-08 20:20           ` Werner LEMBERG
2018-05-08 20:49             ` Werner LEMBERG
2019-11-17  8:23 ` Lars Ingebrigtsen
2019-11-17 15:55   ` Eli Zaretskii
2019-11-17 16:05     ` Lars Ingebrigtsen

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=83wowoqy1a.fsf@gnu.org \
    --to=eliz@gnu.org \
    --cc=31316@debbugs.gnu.org \
    --cc=wl@gnu.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
Code repositories for project(s) associated with this external index

	https://git.savannah.gnu.org/cgit/emacs.git
	https://git.savannah.gnu.org/cgit/emacs/org-mode.git

This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.