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.)
next prev parent 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
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