Package: emacs;
Reported by: Alexander Shukaev <emacs <at> Alexander.Shukaev.name>
Date: Thu, 3 Sep 2020 07:20:02 UTC
Severity: normal
Fixed in version 28.1
Done: Robert Pluim <rpluim <at> gmail.com>
Bug is archived. No further changes may be made.
Message #32 received at 43177 <at> debbugs.gnu.org (full text, mbox):
From: Alexander Shukaev <emacs <at> Alexander.Shukaev.name> To: Robert Pluim <rpluim <at> gmail.com> Cc: 43177 <at> debbugs.gnu.org Subject: Re: bug#43177: Bug: Emacs 27.1 hangs forever in `FcCharSetSubtractCount' from '/usr/lib/libfontconfig.so.1' Date: Thu, 3 Sep 2020 11:40:07 +0200
On 03/09/2020 11:07, Robert Pluim wrote:
>>>>>> On Thu, 3 Sep 2020 11:02:16 +0200, Alexander Shukaev <emacs <at> Alexander.Shukaev.name> said:
>
> Alexander> /usr/share/fonts/TTF/AdobeBlank-Regular.ttf is owned by
> Alexander> ttf-google-fonts-git 20171026-1
>
> Looks like Pip's crystal ball was right, thatʼs the same font
> impicated in Bug#40733
>
> Alexander> I will try updating it now and see if it fixes the issue. However,
> Alexander> even if it does, I have a bunch of follow-up questions:
>
> Alexander> 1. How to protect Emacs from having that issue again regardless of
> Alexander> broken/out-dated fonts? Can I somehow, for example, exclude such
> Alexander> fonts from consideration by Emacs?
>
> face-ignored-fonts is a variable defined in `C source code'.
> Its value is nil
>
> Probably introduced at or before Emacs version 21.1.
>
> Documentation:
> List of ignored fonts.
> Each element is a regular expression that matches names of fonts to
> ignore.
>
> Alexander> 2. Why was this font queried at all in the first place? I don't use
> Alexander> this font.
>
> You donʼt use it, but fontconfig know about it, so it queries it when
> Emacs queries fontconfig for available fonts covering a certain
> codepoint.
>
> Robert
>
Right, so briefly testing, I think the scrolling hang is gone thanks to
(add-to-list 'face-ignored-fonts "Adobe.*Blank")
However, hang from opening certain files is still there and is also
font-related, though with a different symptom:
Thread 1 "emacs" received signal SIGABRT, Aborted.
0x00007ffff5c0646f in poll () from /usr/lib/libc.so.6
(gdb) bt
#0 0x00007ffff5c0646f in poll () at /usr/lib/libc.so.6
#1 0x00007ffff6e2a63b in () at /usr/lib/libxcb.so.1
#2 0x00007ffff6e2c08f in () at /usr/lib/libxcb.so.1
#3 0x00007ffff6e2c203 in xcb_wait_for_reply64 () at /usr/lib/libxcb.so.1
#4 0x00007ffff6e904b9 in _XReply () at /usr/lib/libX11.so.6
#5 0x00007ffff6e71e71 in () at /usr/lib/libX11.so.6
#6 0x00007ffff6e7254e in XLoadQueryFont () at /usr/lib/libX11.so.6
#7 0x0000555555a8d875 in xfont_supported_scripts
(display=0x555556594940, fontname=0x55556a79e428 "-misc-trirong
medium-medium-i-normal--0-0-0-0-p-0-iso10646-1",
props=XIL(0x7ffff27926e5), encoding=0x7ffff23ab8d0) at xfont.c:266
#8 0x0000555555a8e5eb in xfont_list_pattern (display=0x555556594940,
pattern=0x7fffffff6450 "-*-*-*-*-*-*-*-*-*-*-*-*-iso10646-1",
registry=XIL(0x84c0), script=XIL(0x2aaa9c470db0)) at xfont.c:441
#9 0x0000555555a8e94d in xfont_list (f=0x5555564db330,
spec=XIL(0x7ffff2794475)) at xfont.c:486
#10 0x0000555555983724 in font_list_entities (f=0x5555564db330,
spec=XIL(0x55556932a495)) at font.c:2794
#11 0x000055555598588c in font_find_for_lface (f=0x5555564db330,
attrs=0x555564a499c0, spec=XIL(0x5555568e6125), c=-1) at font.c:3285
#12 0x0000555555ab4a23 in fontset_find_font
(fontset=XIL(0x555569329a45), c=43695, face=0x555564a499c0,
charset_id=-1, fallback=false) at fontset.c:661
#13 0x0000555555ab514f in fontset_font (fontset=XIL(0x5555568a0d45),
c=43695, face=0x555564a499c0, id=-1) at fontset.c:783
#14 0x0000555555ab5cff in face_for_char (f=0x5555564db330,
face=0x555564a499c0, c=43695, pos=38, object=XIL(0)) at fontset.c:997
#15 0x00005555555d0b96 in FACE_FOR_CHAR (f=0x5555564db330,
face=0x555564a499c0, character=43695, pos=38, object=XIL(0)) at
dispextern.h:1891
#16 0x00005555555f091a in get_next_display_element (it=0x7fffffff8040)
at xdisp.c:7651
#17 0x0000555555626aae in display_line (it=0x7fffffff8040,
cursor_vpos=8) at xdisp.c:23222
#18 0x0000555555617030 in try_window (window=XIL(0x5555564db575),
pos=..., flags=1) at xdisp.c:19182
#19 0x0000555555613c67 in redisplay_window (window=XIL(0x5555564db575),
just_this_one_p=false) at xdisp.c:18600
#20 0x000055555560aefd in redisplay_window_0
(window=XIL(0x5555564db575)) at xdisp.c:16314
#21 0x000055555594c082 in internal_condition_case_1 (bfun=0x55555560aebb
<redisplay_window_0>, arg=XIL(0x5555564db575),
handlers=XIL(0x7ffff279a6f3), hfun=0x55555560ae83 <redisplay_window_error>)
at eval.c:1380
#22 0x000055555560ae55 in redisplay_windows (window=XIL(0x5555564db575))
at xdisp.c:16294
#23 0x000055555560ae06 in redisplay_windows (window=XIL(0x5555629c9865))
at xdisp.c:16288
#24 0x000055555560978e in redisplay_internal () at xdisp.c:15762
#25 0x000055555560712f in redisplay () at xdisp.c:14989
#26 0x00005555557e20ca in read_char (commandflag=1,
map=XIL(0x555569315a13), prev_event=XIL(0),
used_mouse_menu=0x7fffffffd3f5, end_time=0x0) at keyboard.c:2493
#27 0x00005555557f5a94 in read_key_sequence (keybuf=0x7fffffffd5e0,
prompt=XIL(0), dont_downcase_last=false, can_return_switch_frame=true,
fix_current_buffer=true, prevent_redisplay=false) at keyboard.c:9553
#28 0x00005555557de249 in command_loop_1 () at keyboard.c:1350
#29 0x000055555594bfa5 in internal_condition_case (bfun=0x5555557ddda4
<command_loop_1>, handlers=XIL(0x90), hfun=0x5555557dd370 <cmd_error>)
at eval.c:1356
#30 0x00005555557dd97c in command_loop_2 (ignore=XIL(0)) at keyboard.c:1091
#31 0x000055555594b3ea in internal_catch (tag=XIL(0xd530),
func=0x5555557dd94e <command_loop_2>, arg=XIL(0)) at eval.c:1117
#32 0x00005555557dd919 in command_loop () at keyboard.c:1070
#33 0x00005555557dce47 in recursive_edit_1 () at keyboard.c:714
#34 0x00005555557dd046 in Frecursive_edit () at keyboard.c:786
#35 0x00005555557d313e in main (argc=1, argv=0x7fffffffda68) at emacs.c:2062
Lisp Backtrace:
"redisplay_internal (C function)" (0x0)
(gdb) f 7
#7 0x0000555555a8d875 in xfont_supported_scripts
(display=0x555556594940, fontname=0x55556a79e428 "-misc-trirong
medium-medium-i-normal--0-0-0-0-p-0-iso10646-1", props=XIL(0x7ffff27926e5),
encoding=0x7ffff23ab8d0) at xfont.c:266
266 xfont = XLoadQueryFont (display, fontname);
(gdb) pp fontname
#<INVALID_LISP_OBJECT 0x55556a79e428>
(gdb) pp fontname
#<INVALID_LISP_OBJECT 0x55556a79e428>
(gdb) p fontname
$3 = 0x55556a79e428 "-misc-trirong
medium-medium-i-normal--0-0-0-0-p-0-iso10646-1"
(gdb)
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