From: Leah Neukirchen <leah@vuxu.org>
To: Noam Postavsky <npostavs@gmail.com>
Cc: "Basil L. Contovounesios" <contovob@tcd.ie>, 35273@debbugs.gnu.org
Subject: bug#35273: "Marker does not point anywhere" when reading next article
Date: Tue, 16 Apr 2019 14:50:47 +0200 [thread overview]
Message-ID: <87wojum7vc.fsf@vuxu.org> (raw)
In-Reply-To: <87zhoqxgzn.fsf@gmail.com> (Noam Postavsky's message of "Tue, 16 Apr 2019 08:38:20 -0400")
Noam Postavsky <npostavs@gmail.com> writes:
> Leah Neukirchen <leah@vuxu.org> writes:
>
>> If you have other ideas how I can debug it myself, please tell me.
>
> If you can reproduce it reliably, setting (setq debug-on-signal t) just
> before might help get a backtrace.
>
> If that also doesn't work you could record the backtrace from a
> signal-hook-function:
>
> (defvar bug-35273-last-backtrace nil)
> (defun bug-35273-record-backtrace (err data)
> (when (and (eq err 'error)
> (equal data '("Marker does not point anywhere")))
> (setq bug-35273-last-backtrace
> (backtrace-frames 'signal)))
> (let ((signal-hook-function nil))
> (signal err data)))
> (setq signal-hook-function #'bug-35273-record-backtrace)
These do not work for some reason...
> Or if you can run under gdb, just set a breakpoint in the C code where
> that error is raised.
On 27.0.50 (05d53d888):
Breakpoint 1, marker_position (marker=0x555557d6feb5) at marker.c:680
680 error ("Marker does not point anywhere");
(gdb) bt
#0 marker_position (marker=0x555557d6feb5) at marker.c:680
#1 0x000055555567935e in mouse_face_overlay_overlaps (overlay=0x555557d6ff15)
at lisp.h:2624
#2 0x00005555555d395f in note_mouse_highlight (f=f@entry=0x555556001d70,
x=<optimized out>, y=<optimized out>) at xdisp.c:31836
#3 0x0000555555633ee8 in XTframe_up_to_date (f=0x555556001d70) at xterm.c:1280
#4 0x00005555555c67de in redisplay_internal () at xdisp.c:14523
#5 0x00005555555c7dd5 in redisplay_preserve_echo_area (
from_where=from_where@entry=5) at xdisp.c:14759
#6 0x0000555555661902 in read_char (commandflag=commandflag@entry=1,
map=map@entry=0x555557807873, prev_event=0x0,
used_mouse_menu=used_mouse_menu@entry=0x7fffffffe05b,
end_time=end_time@entry=0x0) at keyboard.c:2474
#7 0x00005555556642a1 in read_key_sequence (
keybuf=keybuf@entry=0x7fffffffe170, prompt=prompt@entry=0x0,
dont_downcase_last=dont_downcase_last@entry=false,
can_return_switch_frame=can_return_switch_frame@entry=true,
fix_current_buffer=fix_current_buffer@entry=true,
prevent_redisplay=prevent_redisplay@entry=false) at keyboard.c:9111
#8 0x0000555555665abc in command_loop_1 () at lisp.h:1064
#9 0x00005555556d4b6e in internal_condition_case (
bfun=bfun@entry=0x5555556658d0 <command_loop_1>,
handlers=handlers@entry=0x5010, hfun=hfun@entry=0x55555565ce40 <cmd_error>)
at eval.c:1352
#10 0x0000555555657b14 in command_loop_2 (ignore=ignore@entry=0x0)
at lisp.h:1064
#11 0x00005555556d4add in internal_catch (tag=tag@entry=0xc5d0,
func=func@entry=0x555555657af0 <command_loop_2>, arg=arg@entry=0x0)
at eval.c:1115
#12 0x0000555555657aab in command_loop () at lisp.h:1064
#13 0x000055555565ca36 in recursive_edit_1 () at keyboard.c:714
#14 0x000055555565cd69 in Frecursive_edit () at keyboard.c:786
#15 0x000055555558890e in main (argc=1, argv=0x7fffffffe538) at emacs.c:1963
(gdb) xbacktrace
"redisplay_internal (C function)" (0x0)
(gdb) p buf
$2 = (struct buffer *) 0x0
(gdb) p *m
$4 = {
header = {
size = 4611686018477740032
},
buffer = 0x0,
need_adjustment = false,
insertion_type = true,
next = 0x555557d6fe80,
charpos = 1,
bytepos = 1
}
hth,
--
Leah Neukirchen <leah@vuxu.org> http://leah.zone
next prev parent reply other threads:[~2019-04-16 12:50 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-04-14 13:42 bug#35273: "Marker does not point anywhere" when reading next article Leah Neukirchen
2019-04-14 16:31 ` Basil L. Contovounesios
2019-04-14 21:19 ` Leah Neukirchen
2019-04-16 12:38 ` Noam Postavsky
2019-04-16 12:50 ` Leah Neukirchen [this message]
2019-04-16 13:13 ` Noam Postavsky
2019-04-16 13:21 ` Leah Neukirchen
2019-04-16 13:56 ` Noam Postavsky
2019-04-16 14:04 ` Leah Neukirchen
2019-04-16 15:02 ` Eli Zaretskii
2019-04-20 12:05 ` Noam Postavsky
2019-04-20 13:44 ` Eli Zaretskii
2019-04-20 16:20 ` Eli Zaretskii
2019-04-27 16:17 ` Noam Postavsky
2019-04-27 16:49 ` Eli Zaretskii
2019-04-27 19:28 ` Noam Postavsky
2019-04-27 19:35 ` Eli Zaretskii
2019-04-28 12:45 ` Noam Postavsky
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