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Re: infloop when removing character
From: |
Simon Josefsson |
Subject: |
Re: infloop when removing character |
Date: |
Fri, 15 Aug 2003 00:35:30 +0200 |
User-agent: |
Gnus/5.1003 (Gnus v5.10.3) Emacs/21.2 (gnu/linux) |
Richard Stallman <address@hidden> writes:
> 809 while (--cursor != ceiling_addr && *cursor != '\n')
> (gdb) n
> 814 if (++count == 0)
>
> This loop increases count.
>
> (gdb) p count
> $8 = -516
>
> Ok.
>
> Program received signal SIGTSTP, Stopped (user).
> 0x08140f15 in scan_newline (start=1086115847, start_byte=513066, limit=1,
> limit_byte=1, count=-9641, allow_quit=0) at search.c:809
> 809 while (--cursor != ceiling_addr && *cursor != '\n')
> (gdb) p count
> $9 = -9641
>
> Something made count smaller. Apparently some other code did run.
> Can you find out what happened?
>
> Did the first call to scan_newline return and did it get called again?
> Please try using the `finish' command as explained in etc/DEBUG.
OK, it has happened again. I noticed some text in the echo area:
Error in post-command hook: ...
I didn't catch the final part of it, and now Emacs doesn't redisplay
itself any more so I cannot read it.
It happened when I was composing a mail in Gnus (it occurred in
different situations before), and my post-command-hook there is (this
is from another session, but I believe it is the same in the hung
process too):
post-command-hook's value is
(t flyspell-post-command-hook)
Local in buffer *wide reply to Richard Stallman*; global value is
(tooltip-activate-mouse-motions-if-enabled global-font-lock-mode-buffers
hl-line-highlight)
Below is the 'finish' gdb log. The process is still running in case
someone wants me to debug it, although I cannot promise to keep it
around for very long.
Program received signal SIGTSTP, Stopped (user).
0x08140f17 in scan_newline (start=1086652423, start_byte=476717, limit=1,
limit_byte=1, count=-6874, allow_quit=0) at search.c:809
809 while (--cursor != ceiling_addr && *cursor != '\n')
(gdb) finish
Run till exit from #0 0x08140f17 in scan_newline (start=1086652423,
start_byte=476717, limit=1, limit_byte=1, count=-6874, allow_quit=0)
at search.c:809
message_dolog (m=0x81a5be4 "", nbytes=-1073753312, nlflag=1, multibyte=0)
at xdisp.c:6281
6281 del_range_both (BEG, BEG_BYTE, PT, PT_BYTE, 0);
Value returned is $10 = 1
(gdb) finish
Run till exit from #0 message_dolog (m=0x81a5be4 "", nbytes=-1073753312,
nlflag=1, multibyte=0) at xdisp.c:6281
0x080969b4 in message_log_maybe_newline () at xdisp.c:6146
6146 message_dolog ("", 0, 1, 0);
(gdb) finish
Run till exit from #0 0x080969b4 in message_log_maybe_newline ()
at xdisp.c:6146
cmd_error_internal (data=1519920912, context=0xbfffd3d0 "") at keyboard.c:1227
1227 bitch_at_user ();
(gdb) finish
Run till exit from #0 cmd_error_internal (data=1519920912,
context=0xbfffd3d0 "") at keyboard.c:1227
cmd_error (data=1519920912) at keyboard.c:1178
1178 Vquit_flag = Qnil;
(gdb) finish
Run till exit from #0 cmd_error (data=1519920912) at keyboard.c:1178
internal_condition_case (bfun=0x810bde4 <command_loop_1>, handlers=405784756,
hfun=0x810b9d8 <cmd_error>) at eval.c:1337
1337 }
Value returned is $11 = 0
(gdb) finish
Run till exit from #0 internal_condition_case (
bfun=0x810bde4 <command_loop_1>, handlers=405784756,
hfun=0x810b9d8 <cmd_error>) at eval.c:1337
0x0810bcba in command_loop_2 () at keyboard.c:1292
1292 val = internal_condition_case (command_loop_1, Qerror, cmd_error);
Value returned is $12 = 0
(gdb) finish
Run till exit from #0 0x0810bcba in command_loop_2 () at keyboard.c:1292