From: Kenichi Handa <handa@m17n.org>
Subject: bug in display_string?
Date: Thu, 26 Sep 2002 22:09:54 +0900 (JST) [thread overview]
Message-ID: <200209261309.WAA13079@etlken.m17n.org> (raw)
Emacs crashed when started as below:
% emacs -fn -*-*-*-*-*-*-*-*-*-*-*-*-iso8859-1
With this, my X server find some unusual font in that the
width of `-' glyph is zero.
The crash happened as below, and a possible fix is also
attached at the tail. But, I'm not sure it's a correct fix.
Gerd, could you please confirm it?
(gdb) bt
#0 0x40302581 in kill () from /lib/libc.so.6
#1 0x080db36a in abort () at emacs.c:412
#2 0x0807a915 in display_string (string=0x0, lisp_string=942570044,
face_string=405492356, face_string_pos=0, start=0, it=0xbfffed24,
field_width=0, precision=1, max_x=984, multibyte=0) at xdisp.c:15073
#3 0x080780be in display_mode_element (it=0xbfffed24, depth=2, field_width=0,
precision=0, elt=942570044, props=405492356, risky=0) at xdisp.c:13882
#4 0x080786a7 in display_mode_element (it=0xbfffed24, depth=1, field_width=0,
precision=0, elt=1479427468, props=405492356, risky=0) at xdisp.c:14107
#5 0x08077abc in display_mode_line (w=0x84efe88, face_id=MODE_LINE_FACE_ID,
format=1479427468) at xdisp.c:13689
#6 0x08077936 in display_mode_lines (w=0x84efe88) at xdisp.c:13646
#7 0x0807773d in redisplay_mode_lines (window=1213136520, force=0)
at xdisp.c:13604
#8 0x08068a00 in echo_area_display (update_frame_p=1) at xdisp.c:7161
#9 0x08066a8c in message3_nolog (m=944328852, nbytes=19, multibyte=0)
at xdisp.c:6058
#10 0x0806683c in message3 (m=944328852, nbytes=19, multibyte=0)
at xdisp.c:5999
#11 0x08066d24 in message_with_string (m=0x8189955 "Loading %s...",
string=942608956, log=1) at xdisp.c:6144
#12 0x081447d3 in Fload (file=942608956, noerror=405492356,
nomessage=405492356, nosuffix=405492356, must_suffix=405492404)
at lread.c:876
#13 0x0813246f in do_autoload (fundef=1479320972, funname=406139068)
at eval.c:1937
#14 0x081332ee in Ffuncall (nargs=2, args=0xbffff294) at eval.c:2793
#15 0x0815a39c in Fbyte_code (bytestr=941880444, vector=1210317156, maxdepth=6)
at bytecode.c:709
#16 0x08133711 in funcall_lambda (fun=1210315876, nargs=0,
arg_vector=0xbffff3a8) at eval.c:2920
#17 0x081332d1 in Ffuncall (nargs=1, args=0xbffff3a4) at eval.c:2790
#18 0x0815a39c in Fbyte_code (bytestr=941875880, vector=1210311480, maxdepth=5)
at bytecode.c:709
#19 0x08133711 in funcall_lambda (fun=1210311312, nargs=0,
arg_vector=0xbffff464) at eval.c:2920
#20 0x08133414 in apply_lambda (fun=1210311312, args=405492356, eval_flag=1)
at eval.c:2842
#21 0x081329ce in Feval (form=1480492956) at eval.c:2150
#22 0x080ddbec in top_level_2 () at keyboard.c:1282
#23 0x081317a9 in internal_condition_case (bfun=0x80ddbd8 <top_level_2>,
handlers=405588940, hfun=0x80dd904 <cmd_error>) at eval.c:1348
#24 0x080ddc1b in top_level_1 () at keyboard.c:1290
#25 0x0813133d in internal_catch (tag=405550244, func=0x80ddbf0 <top_level_1>,
arg=405492356) at eval.c:1108
#26 0x080ddb5a in command_loop () at keyboard.c:1251
#27 0x080dd6c0 in recursive_edit_1 () at keyboard.c:968
#28 0x080dd7f0 in Frecursive_edit () at keyboard.c:1024
#29 0x080dc673 in main (argc=3, argv=0xbffffab4, envp=0xbffffac4)
at emacs.c:1641
#30 0x402f20bf in __libc_start_main () from /lib/libc.so.6
(gdb) up 2
#2 0x080713d5 in display_string (string=0x0, lisp_string=942530652,
face_string=405452964, face_string_pos=0, start=0, it=0xbfffed14,
field_width=0, precision=1, max_x=984, multibyte=0) at xdisp.c:15073
(gdb) list
15068 }
15069 else
15070 {
15071 /* Glyph is off the left margin of the display area.
15072 Should not happen. */
15073 abort ();
15074 }
15075
15076 row->ascent = max (row->ascent, it->max_ascent);
15077 row->height = max (row->height, it->max_ascent + it->max_descent);
(gdb) p i
$1 = 0
(gdb) p nglyphs
$2 = 1
(gdb) p *glyph
$3 = {
charpos = 0,
object = 942570044,
pixel_width = 0,
voffset = 0,
type = 0,
multibyte_p = 0,
left_box_line_p = 0,
right_box_line_p = 0,
overlaps_vertically_p = 0,
padding_p = 0,
glyph_not_available_p = 0,
face_id = 1,
u = {
ch = 45,
cmp_id = 45,
img_id = 45,
stretch = {
height = 45,
ascent = 0
},
val = 45
}
}
(gdb) p glyph->object
$8 = 942570044
(gdb) pr
#("-" 0 1 (help-echo "mouse-1: select (drag to resize), mouse-2: delete others, mouse-3: delete"))
(gdb) p it->truncate_lines_p
$4 = 1
(gdb) p x
$5 = 0
(gdb) p max_x
$6 = 984
(gdb) p it->first_visible_x
$7 = 0
Possible fix.
*** xdisp.c.~1.786.~ Thu Sep 12 22:11:21 2002
--- xdisp.c Thu Sep 26 22:07:34 2002
***************
*** 15059,15067 ****
}
break;
}
! else if (x + glyph->pixel_width > it->first_visible_x)
{
! /* Glyph is at least partially visible. */
++it->hpos;
if (x < it->first_visible_x)
it->glyph_row->x = x - it->first_visible_x;
--- 15059,15070 ----
}
break;
}
! else if (glyph->pixel_width == 0
! ? x >= it->first_visible_x
! : x + glyph->pixel_width > it->first_visible_x)
{
! /* Glyph is at least partially visible, or the glyph has
! zero width. */
++it->hpos;
if (x < it->first_visible_x)
it->glyph_row->x = x - it->first_visible_x;
---
Ken'ichi HANDA
handa@m17n.org
reply other threads:[~2002-09-26 13:09 UTC|newest]
Thread overview: [no followups] expand[flat|nested] mbox.gz Atom feed
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=200209261309.WAA13079@etlken.m17n.org \
--to=handa@m17n.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.