bug#16387: 24.3.50; unquittable infloop

bug#16387: 24.3.50; unquittable infloop

[Richard Stallman]

M-x grep put me in a loop I could not quit out of.
Here's the backtrace after C-g C-g put me into GDB.
Grep had already terminated, but Emacs had not exited the loop
even a minute later.

It happened twice today.  One time, the current buffer was in Mail mode,
and maybe that was true both times.


#0  0x76a4d3c4 in kill () from /lib/libc.so.6
#1  0x00657004 in sys_suspend () at sysdep.c:450
#2  0x0063fcf8 in handle_interrupt (in_signal_handler=true) at keyboard.c:10318
#3  0x0063fb18 in handle_interrupt_signal (sig=2) at keyboard.c:10259
#4  0x006599b0 in deliver_process_signal (sig=2, 
    handler=0x63fa78 <handle_interrupt_signal>) at sysdep.c:1568
#5  0x0063fb74 in deliver_interrupt_signal (sig=2) at keyboard.c:10266
#6  <signal handler called>
#7  0x00000000 in ?? ()
#8  0x00000000 in ?? ()

Lisp Backtrace:
"get-text-property" (0x7fff09e8)
"font-lock-extend-jit-lock-region-after-change" (0x7fff0dbc)
"run-hook-with-args" (0x7fff0db8)
"jit-lock-after-change" (0x7fff1144)
"replace-match" (0x7fff1348)
"grep-filter" (0x7fff1698)
"run-hooks" (0x7fff1710)
"compilation-filter" (0x7fff19dc)




In GNU Emacs 24.3.50.18 (mips64el-unknown-linux-gnu, GTK+ Version 2.20.1)
 of 2013-12-14 on chiefs-gnewsense
Bzr revision: 115526 tzz@lifelogs.com-20131214180409-n2o5017gxsjvz8as
System Description:	gNewSense GNU/Linux 3.0 (parkes)

Configured using:
 `configure 'CFLAGS=-g -O0''

Important settings:
  value of $LANG: en_US.UTF-8
  locale-coding-system: utf-8-unix
  default enable-multibyte-characters: t

Major mode: RMAIL

Minor modes in effect:
  gpm-mouse-mode: t
  tooltip-mode: t
  mouse-wheel-mode: t
  tool-bar-mode: t
  menu-bar-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t
  buffer-read-only: t
  line-number-mode: t
  transient-mark-mode: t
  abbrev-mode: t

Recent input:
ESC x r e p o r t SPC e m a v s DEL DEL c s RET

Recent messages:
Source file `/home/rms/emacs-bzr/trunk/lisp/gnus/mml-sec.el' newer than byte-compiled file
Source file `/home/rms/emacs-bzr/trunk/lisp/emacs-lisp/easymenu.el' newer than byte-compiled file
Source file `/home/rms/emacs-bzr/trunk/lisp/mail/rfc822.el' newer than byte-compiled file
Source file `/home/rms/emacs-bzr/trunk/lisp/format-spec.el' newer than byte-compiled file
Source file `/home/rms/emacs-bzr/trunk/lisp/mail/sendmail.el' newer than byte-compiled file
Counting messages...done
(No new mail has arrived)
0 new messages read
Source file `/home/rms/emacs-bzr/trunk/lisp/gnus/qp.el' newer than byte-compiled file
Source file `/home/rms/emacs-bzr/trunk/lisp/mail/emacsbug.el' newer than byte-compiled file

Load-path shadows:
/home/rms/emacs-bzr/trunk/lisp/leim/quail/lao hides /home/rms/emacs-bzr/trunk/lisp/language/lao
/home/rms/emacs-bzr/trunk/lisp/leim/quail/georgian hides /home/rms/emacs-bzr/trunk/lisp/language/georgian
/home/rms/emacs-bzr/trunk/lisp/leim/quail/thai hides /home/rms/emacs-bzr/trunk/lisp/language/thai
/home/rms/emacs-bzr/trunk/lisp/leim/quail/ethiopic hides /home/rms/emacs-bzr/trunk/lisp/language/ethiopic
/home/rms/emacs-bzr/trunk/lisp/leim/quail/japanese hides /home/rms/emacs-bzr/trunk/lisp/language/japanese
/home/rms/emacs-bzr/trunk/lisp/leim/quail/cyrillic hides /home/rms/emacs-bzr/trunk/lisp/language/cyrillic
/home/rms/emacs-bzr/trunk/lisp/leim/quail/indian hides /home/rms/emacs-bzr/trunk/lisp/language/indian
/home/rms/emacs-bzr/trunk/lisp/leim/quail/hebrew hides /home/rms/emacs-bzr/trunk/lisp/language/hebrew
/home/rms/emacs-bzr/trunk/lisp/leim/quail/greek hides /home/rms/emacs-bzr/trunk/lisp/language/greek
/home/rms/emacs-bzr/trunk/lisp/leim/quail/czech hides /home/rms/emacs-bzr/trunk/lisp/language/czech
/home/rms/emacs-bzr/trunk/lisp/leim/quail/slovak hides /home/rms/emacs-bzr/trunk/lisp/language/slovak
/home/rms/emacs-bzr/trunk/lisp/leim/quail/tibetan hides /home/rms/emacs-bzr/trunk/lisp/language/tibetan

Features:
(shadow mailalias emacsbug qp rmailmm message sendmail format-spec
rfc822 mml easymenu mml-sec mm-decode mm-bodies mm-encode mailabbrev
gmm-utils mailheader mail-parse rfc2231 dired t-mouse package
rmailedit rmail rfc2047 rfc2045 ietf-drums mm-util mail-prsvr
mail-utils time-date paren cus-start cus-load advice help-fns tooltip
electric uniquify ediff-hook vc-hooks lisp-float-type mwheel x-win
x-dnd tool-bar dnd fontset image regexp-opt fringe tabulated-list
newcomment lisp-mode prog-mode register page menu-bar rfn-eshadow
timer select scroll-bar mouse jit-lock font-lock syntax facemenu
font-core frame cham georgian utf-8-lang misc-lang vietnamese tibetan
thai tai-viet lao korean japanese hebrew greek romanian slovak czech
european ethiopic indian cyrillic chinese case-table epa-hook
jka-cmpr-hook help simple abbrev minibuffer nadvice loaddefs button
faces cus-face macroexp files text-properties overlay sha1 md5 base64
format env code-pages mule custom widget hashtable-print-readable
backquote make-network-process dbusbind gfilenotify dynamic-setting
system-font-setting font-render-setting move-toolbar gtk x-toolkit x
multi-tty emacs)
[[[ To any NSA and FBI agents reading my email: please consider    ]]]
[[[ whether defending the US Constitution against all enemies,     ]]]
[[[ foreign or domestic, requires you to follow Snowden's example. ]]]


-- 
Dr Richard Stallman
President, Free Software Foundation
51 Franklin St
Boston MA 02110
USA
www.fsf.org  www.gnu.org
Skype: No way! That's nonfree (freedom-denying) software.
  Use Ekiga or an ordinary phone call.

bug#16387: 24.3.50; unquittable infloop

[Eli Zaretskii]

> Date: Tue, 07 Jan 2014 11:53:23 -0500
> From: Richard Stallman <rms@gnu.org>
> 
> 
> M-x grep put me in a loop I could not quit out of.
> Here's the backtrace after C-g C-g put me into GDB.
> Grep had already terminated, but Emacs had not exited the loop
> even a minute later.
> 
> It happened twice today.  One time, the current buffer was in Mail mode,
> and maybe that was true both times.
> 
> 
> #0  0x76a4d3c4 in kill () from /lib/libc.so.6
> #1  0x00657004 in sys_suspend () at sysdep.c:450
> #2  0x0063fcf8 in handle_interrupt (in_signal_handler=true) at keyboard.c:10318
> #3  0x0063fb18 in handle_interrupt_signal (sig=2) at keyboard.c:10259
> #4  0x006599b0 in deliver_process_signal (sig=2, 
>     handler=0x63fa78 <handle_interrupt_signal>) at sysdep.c:1568
> #5  0x0063fb74 in deliver_interrupt_signal (sig=2) at keyboard.c:10266
> #6  <signal handler called>

Any idea why sys_suspend is on the call stack?  Did you really type
C-z?

bug#16387: 24.3.50; unquittable infloop

[Richard Stallman]

[[[ To any NSA and FBI agents reading my email: please consider    ]]]
[[[ whether defending the US Constitution against all enemies,     ]]]
[[[ foreign or domestic, requires you to follow Snowden's example. ]]]

    Any idea why sys_suspend is on the call stack?  Did you really type
    C-z?

C-g C-g (emergency escape) calls  sys_suspend.

-- 
Dr Richard Stallman
President, Free Software Foundation
51 Franklin St
Boston MA 02110
USA
www.fsf.org  www.gnu.org
Skype: No way! That's nonfree (freedom-denying) software.
  Use Ekiga or an ordinary phone call.

bug#16387: 24.3.50; unquittable infloop

[Stefan Kangas]

Richard Stallman <rms@gnu.org> writes:

> M-x grep put me in a loop I could not quit out of.
> Here's the backtrace after C-g C-g put me into GDB.
> Grep had already terminated, but Emacs had not exited the loop
> even a minute later.
>
> It happened twice today.  One time, the current buffer was in Mail mode,
> and maybe that was true both times.
>
>
> #0  0x76a4d3c4 in kill () from /lib/libc.so.6
> #1  0x00657004 in sys_suspend () at sysdep.c:450
> #2  0x0063fcf8 in handle_interrupt (in_signal_handler=true) at keyboard.c:10318
> #3  0x0063fb18 in handle_interrupt_signal (sig=2) at keyboard.c:10259
> #4  0x006599b0 in deliver_process_signal (sig=2,
>     handler=0x63fa78 <handle_interrupt_signal>) at sysdep.c:1568
> #5  0x0063fb74 in deliver_interrupt_signal (sig=2) at keyboard.c:10266
> #6  <signal handler called>
> #7  0x00000000 in ?? ()
> #8  0x00000000 in ?? ()
>
> Lisp Backtrace:
> "get-text-property" (0x7fff09e8)
> "font-lock-extend-jit-lock-region-after-change" (0x7fff0dbc)
> "run-hook-with-args" (0x7fff0db8)
> "jit-lock-after-change" (0x7fff1144)
> "replace-match" (0x7fff1348)
> "grep-filter" (0x7fff1698)
> "run-hooks" (0x7fff1710)
> "compilation-filter" (0x7fff19dc)

This was reported 6.5 years ago.  Are you still seeing this?

Best regards,
Stefan Kangas

bug#16387: 24.3.50; unquittable infloop

[Lars Ingebrigtsen]

Stefan Kangas <stefan@marxist.se> writes:

> This was reported 6.5 years ago.  Are you still seeing this?

And that was a year ago, so I think it's unlikely that there will be
further progress in this bug report, and I'm closing it.  If the problem
reappears, please respond to the debbugs address and we'll reopen it.

-- 
(domestic pets only, the antidote for overdose, milk.)
   bloggy blog: http://lars.ingebrigtsen.no