--- Begin Message ---
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Subject: |
24.5; Emacs looping with 100% CPU at line 15287 (?) of xdisp.c |
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Date: |
Sun, 14 Jun 2015 01:15:29 -0300 |
I have Emacs stuck in a loop and running at 100% CPU. GDB is attached.
(gdb) bt
#0 0x0000000000462063 in redisplay_window (window=18301693,
address@hidden) at ../../src/xdisp.c:15286
#1 0x0000000000463a36 in redisplay_window_1 (address@hidden) at
../../src/xdisp.c:14381
#2 0x000000000055a58b in internal_condition_case_1 (bfun=0x463a00
<redisplay_window_1>, arg=18301693, handlers=<optimized out>, hfun=0x42bac0
<redisplay_window_error>) at ../../src/eval.c:1372
#3 0x0000000000453aa1 in redisplay_internal () at ../../src/xdisp.c:14024
#4 0x0000000000454455 in redisplay () at ../../src/xdisp.c:13229
#5 0x00000000004f44a1 in read_char (commandflag=1, address@hidden,
prev_event=12311602, address@hidden, address@hidden) at
../../src/keyboard.c:2571
#6 0x00000000004f5c1f in read_key_sequence (address@hidden,
prompt=12311602, address@hidden, address@hidden, address@hidden,
address@hidden, bufsize=30)
at ../../src/keyboard.c:9089
#7 0x00000000004f7990 in command_loop_1 () at ../../src/keyboard.c:1453
#8 0x000000000055a467 in internal_condition_case (address@hidden
<command_loop_1>, handlers=<optimized out>, address@hidden <cmd_error>)
at ../../src/eval.c:1348
#9 0x00000000004e9f6e in command_loop_2 (address@hidden) at
../../src/keyboard.c:1178
#10 0x000000000055a34b in internal_catch (tag=12359074, address@hidden
<command_loop_2>, arg=12311602) at ../../src/eval.c:1112
#11 0x00000000004ee567 in recursive_edit_1 () at ../../src/keyboard.c:1157
#12 0x00000000004ee567 in recursive_edit_1 () at ../../src/keyboard.c:778
#13 0x00000000004ee880 in Frecursive_edit () at ../../src/keyboard.c:849
#14 0x0000000000418079 in main (argc=<optimized out>, argv=0x7ffc481ee568)
at ../../src/emacs.c:1642
I can step through the code without difficulty:
(gdb) step
bidi_shelve_cache () at ../../src/bidi.c:846
846 if (bidi_cache_idx == 0)
But trying to step out with `finish', leaves me looping again trying to
exit from #0:
(gdb) finish
Run till exit from #0 bidi_shelve_cache () at ../../src/bidi.c:846
redisplay_window (window=18301693, address@hidden) at
../../src/xdisp.c:15287
15287 } while (line_bottom_y (&it1) - start_y <
amount_to_scroll);
Value returned is $1 = (void *) 0x0
(gdb) finish
Run till exit from #0 redisplay_window (window=18301693, address@hidden)
at ../../src/xdisp.c:15287
^C
Program received signal SIGINT, Interrupt.
0x0000000000462063 in redisplay_window (window=18301693, address@hidden) at
../../src/xdisp.c:15286
15286 SAVE_IT (it1, it, it1data);
(gdb)
What should I do next? Can any information still be gleaned from this?
(This is not with my own build but the optimised one from Fedora 21.)
Thanks.
===
In GNU Emacs 24.5.1 (x86_64-redhat-linux-gnu, GTK+ Version 3.14.12)
of 2015-05-07 on buildvm-08.phx2.fedoraproject.org
Windowing system distributor `Fedora Project', version 11.0.11603000
System Description: Fedora release 21 (Twenty One)
Configured using:
`configure --build=x86_64-redhat-linux-gnu
--host=x86_64-redhat-linux-gnu --program-prefix=
--disable-dependency-tracking --prefix=/usr --exec-prefix=/usr
--bindir=/usr/bin --sbindir=/usr/sbin --sysconfdir=/etc
--datadir=/usr/share --includedir=/usr/include --libdir=/usr/lib64
--libexecdir=/usr/libexec --localstatedir=/var
--sharedstatedir=/var/lib --mandir=/usr/share/man
--infodir=/usr/share/info --with-dbus --with-gif --with-jpeg --with-png
--with-rsvg --with-tiff --with-xft --with-xpm --with-x-toolkit=gtk3
--with-gpm=no build_alias=x86_64-redhat-linux-gnu
host_alias=x86_64-redhat-linux-gnu 'CFLAGS=-DMAIL_USE_LOCKF -O2 -g
-pipe -Wall -Werror=format-security -Wp,-D_FORTIFY_SOURCE=2
-fexceptions -fstack-protector-strong --param=ssp-buffer-size=4
-grecord-gcc-switches -m64 -mtune=generic' 'LDFLAGS=-Wl,-z,relro ''
Important settings:
value of $LC_MONETARY: en_DK.utf8
value of $LC_NUMERIC: en_DK.utf8
value of $LC_TIME: en_DK.utf8
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value of $XMODIFIERS: @im=ibus
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--- End Message ---
--- Begin Message ---
|
Subject: |
Re: bug#20808: 24.5; Emacs looping with 100% CPU at line 15287 (?) of xdisp.c |
|
Date: |
Wed, 17 Jun 2015 20:22:16 +0300 |
> From: address@hidden (N. Jackson)
> Cc: address@hidden
> Date: Wed, 17 Jun 2015 08:30:18 -0300
>
> As for "near" the end of the buffer, yes, for some value of "near".
>
> That webpage has some text at the top and below that are images only. It
> turns out (I just checked with an even shorter window), that Eww/shr is
> displaying all of those images on the same line and that line is the
> last line of the buffer.
>
> The images get sized (by Eww/shr?) so that each of them fits within the
> window height and with the even shorter window I just tried (maybe four
> or five text lines high), they are sufficiently small that the entire
> line of them fits within the width of the window.
>
> But with the eleven-text-lines-high window that the webpage opens in
> from Gnus, the line of images is wider than the window so it is wrapped
> to two "lines" or rows in the window.
>
> The infloop always occurs when the window is showing the top row of
> images (and a little bit of the top of the tallest image in the second
> row), so (because the line of images is the last line of the buffer),
> yes, the infloop occurs when scrolling near the last line of the buffer;
> however it is not the last line of the window, but rather, more like
> half way up it, if that makes any sense.
Sorry, when I was talking about "lines", I really meant "screen
lines", i.e. horizontal rows of "display elements", be it character
glyphs or images. I didn't mean "lines" as the measure of height.
> I hope that helps.
It does, thanks.
I've pushed the change. Thanks a lot for your help in debugging this.
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