bug#19606: 24.4; Emacs hangs when editing a 5-line Org file

bug#19606: 24.4; Emacs hangs when editing a 5-line Org file

[Fabrice Niessen]

Hello,

With the following file -- and my configuration file (!):

--8<---------------cut here---------------start------------->8---
#+TITLE:     ECM
#+LANGUAGE:  en

#+PROPERTY:  eval yes

* Macro

Date at export time: /{{{time(%Y-%m-%d)}}}/.
--8<---------------cut here---------------end--------------->8---

Emacs hangs when replacing "yes" by "no" for the "eval" property.

Recipe:
- Put cursor after "yes"
- Delete "yes"
- Type "no"

Symptom: After "n", Emacs hangs, taking 100% of one CPU core.

Video: http://screencast.com/t/SLRIBOdt

GDB trace:

--8<---------------cut here---------------start------------->8---
$ gdb -p 1204
GNU gdb (GDB) 7.8
Copyright (C) 2014 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "i686-pc-cygwin".
Type "show configuration" for configuration details.
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>.
Find the GDB manual and other documentation resources online at:
<http://www.gnu.org/software/gdb/documentation/>.
For help, type "help".
Type "apropos word" to search for commands related to "word".
/cygdrive/d/Users/fni/.gdbinit:19: Error in sourced command file:
No symbol table is loaded.  Use the "file" command.
Attaching to process 1204
[New Thread 1204.0x2ca8]
[New Thread 1204.0x6338]
[New Thread 1204.0x4120]
[New Thread 1204.0x47f0]
[New Thread 1204.0x5b9c]
[New Thread 1204.0x5a24]
[New Thread 1204.0x1f1c]
[New Thread 1204.0x3544]
[New Thread 1204.0x3194]
[New Thread 1204.0x3214]
[New Thread 1204.0x5dfc]
[New Thread 1204.0x5e1c]
[New Thread 1204.0x15ac]
[New Thread 1204.0x2770]
[New Thread 1204.0x17bc]
Reading symbols from /cygdrive/c/Program Files (x86)/emacs-24.4/bin/emacs.exe...done.
0x77d3f925 in ntdll!DbgBreakPoint ()
   from /cygdrive/c/Windows/SYSTEM32/ntdll.dll
(gdb) source ~/.gdbinit
Warning: /cygdrive/c/Program Files (x86)/emacs-24.4/bin/../lwlib: No such file or directory.
SIGINT is used by the debugger.
Are you sure you want to change it? (y or n) [answered Y; input not from terminal]
Environment variable "DISPLAY" not defined.
TERM = xterm-256color
Breakpoint 1 at 0x109436d: file ../../emacs-24.4/src/emacs.c, line 350.
Temporary breakpoint 2 at 0x10aa8ce: file ../../emacs-24.4/src/sysdep.c, line 850.
(gdb) thread apply all backtrace

Thread 15 (Thread 1204.0x17bc):
#0  0x77d3f925 in ntdll!DbgBreakPoint ()
   from /cygdrive/c/Windows/SYSTEM32/ntdll.dll
#1  0x77dadb8c in ntdll!DbgUiRemoteBreakin ()
   from /cygdrive/c/Windows/SYSTEM32/ntdll.dll
#2  0x70055eb2 in ?? ()
#3  0x775b86e3 in KERNEL32!BaseThreadInitThunk ()
   from /cygdrive/c/Windows/SYSTEM32/KERNEL32.DLL
#4  0x77d6be19 in ntdll!RtlInitializeExceptionChain ()
   from /cygdrive/c/Windows/SYSTEM32/ntdll.dll
#5  0x77d6bdec in ntdll!RtlInitializeExceptionChain ()
   from /cygdrive/c/Windows/SYSTEM32/ntdll.dll
#6  0x00000000 in ?? ()

Lisp Backtrace:
"redisplay_internal (C function)" (0x1407e78)
"redisplay" (0x88f254)
"sit-for" (0x88f3a8)
"flyspell-check-word-p" (0x88f4f8)
"byte-code" (0x88f610)
"flyspell-post-command-hook" (0x88f844)

Thread 14 (Thread 1204.0x2770):
#0  0x77d3de5c in ntdll!ZwDelayExecution ()
   from /cygdrive/c/Windows/SYSTEM32/ntdll.dll
#1  0x755311f8 in SleepEx () from /cygdrive/c/Windows/SYSTEM32/KERNELBASE.dll
#2  0x00000001 in ?? ()
#3  0x6eb5ff20 in ?? ()
#4  0x0114ab1e in watch_worker (arg=0x3bf5d40)
    at ../../emacs-24.4/src/w32notify.c:278
#5  0x775b86e3 in KERNEL32!BaseThreadInitThunk ()
   from /cygdrive/c/Windows/SYSTEM32/KERNEL32.DLL
#6  0x77d6be19 in ntdll!RtlInitializeExceptionChain ()
   from /cygdrive/c/Windows/SYSTEM32/ntdll.dll
#7  0x77d6bdec in ntdll!RtlInitializeExceptionChain ()
   from /cygdrive/c/Windows/SYSTEM32/ntdll.dll
#8  0x00000000 in ?? ()
[Thread 1204.0x17bc exited with code 0]

[Thread 1204.0x4120 exited with code 1]
[Thread 1204.0x3544 exited with code 1]
[Thread 1204.0x5e1c exited with code 1]
[Thread 1204.0x2770 exited with code 1]
[Thread 1204.0x47f0 exited with code 1]
[Thread 1204.0x5dfc exited with code 1]
[Thread 1204.0x5a24 exited with code 1]
[Thread 1204.0x1f1c exited with code 1]
[Thread 1204.0x3194 exited with code 1]
[Thread 1204.0x3214 exited with code 1]
[Thread 1204.0x5b9c exited with code 1]
[Thread 1204.0x15ac exited with code 1]
[Inferior 1 (process 1204) exited with code 01]
(gdb) The program being debugged exited while in a function called from GDB.
Evaluation of the expression containing the function
(backtrace_top) will be abandoned.
--8<---------------cut here---------------end--------------->8---

I can't reproduce it with emacs -Q.

In GNU Emacs 24.4.1 (i686-pc-mingw32)
 of 2014-10-20 on LEG570
Windowing system distributor `Microsoft Corp.', version 6.2.9200
Important settings:
  value of $LANG: en_US.utf8
  locale-coding-system: cp1252

Major mode: Org

Minor modes in effect:
  diff-hl-dired-mode: t
  gnus-dired-mode: t
  helm-match-plugin-mode: t
  helm-occur-match-plugin-mode: t
  shell-dirtrack-mode: t
  recentf-mode: t
  auto-image-file-mode: t
  global-flycheck-mode: t
  global-company-mode: t
  company-mode: t
  guide-key-mode: t
  google-this-mode: t
  yas-global-mode: t
  yas-minor-mode: t
  electric-pair-mode: t
  show-paren-mode: t
  which-function-mode: t
  global-auto-revert-mode: t
  global-hl-line-mode: t
  global-diff-hl-mode: t
  diff-auto-refine-mode: t
  fancy-narrow-mode: t
  delete-selection-mode: t
  global-undo-tree-mode: t
  electric-indent-mode: t
  mouse-wheel-mode: t
  menu-bar-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  blink-cursor-mode: t
  auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t
  buffer-read-only: t
  column-number-mode: t
  line-number-mode: t
  transient-mark-mode: t

Features:
(shadow emacsbug calc-map calc-stat calc-vec calc-ext calc-menu
calc-aent calc calc-loaddefs calc-macs vc-bzr vc-sccs vc-cvs vc-rcs
diff-hl-dired gnus-dired tabify helm-command helm-elisp helm-eval
helm-mode filecache ido helm-files tramp tramp-compat tramp-loaddefs
trampver ffap helm-buffers helm-elscreen helm-tags helm-bookmark
helm-adaptive helm-info helm-net browse-url xml helm-locate helm-help
helm-org helm-match-plugin helm-grep helm-regexp helm-plugin grep
helm-external helm-utils dired-sort-map dired-single dired+ image-dired
bookmark+ bookmark+-key bookmark+-1 bookmark+-bmu bookmark+-lit bookmark
pp dired-x dired-aux dired compile helm-misc helm helm-source misearch
multi-isearch fuzzy gnus-alias bbdb-message mailalias sendmail sh-script
smie executable eldoc hideshow vc-svn flyspell ispell org-clock org-mime
org-crypt git-commit-mode log-edit pcvs-util add-log vc-git org-table
org-checklist org-id org-gnus org-habit org-custom-agenda-views
org-agenda org-info org-element avl-tree ob-sql ob-shell shell ob-org
ob-makefile ob-ledger ob-dot ob-ditaa ob-awk ob-R appt diary-lib
diary-loaddefs org-inlinetask org org-macro org-footnote org-pcomplete
pcomplete org-list org-faces org-entities noutline outline org-version
ob-emacs-lisp ob ob-tangle ob-ref ob-lob ob-table ob-exp org-src ob-keys
ob-comint comint ob-core ob-eval org-compat org-macs cal-menu calendar
cal-loaddefs whitespace nnir flow-fill server recentf tree-widget sort
ansi-color gnus-cite gnus-async gnus-bcklg qp gnus-ml gnus-topic
image-file mail-extr utf-7 nndraft nnmh nnimap parse-time utf7
gnus-agent gnus-srvr gnus-score score-mode nnvirtual gnus-msg gnus-art
mm-uu mml2015 mm-view mml-smime smime dig gnus-cache gnus-sum time-stamp
copyright epa-file epa netrc gnutls nntp gnus-group gnus-undo nnmail
mail-source nnoo gnus-leuven bbdb-gnus bbdb-mua bbdb-com crm bbdb
bbdb-site timezone mule-util gnus-start gnus-spec gnus-int gnus-range
gnus-win gnus gnus-ems nnheader wid-edit powerline powerline-separators
color powerline-themes flycheck rx subr-x company-files company-oddmuse
company-keywords company-etags etags-select etags ring company-gtags
company-dabbrev-code company-dabbrev company-capf company-cmake
company-ropemacs company-xcode company-clang company-semantic
company-eclim company-template company-css company-nxml company-bbdb
company emacs-leuven guide-key s ucs-normalize popwin dash leuven-theme
google-this saveplace yasnippet help-mode find-func pcase elec-pair
paren which-func imenu hl-tags-mode derived org-loaddefs
fill-column-indicator helm-config async-bytecomp async helm-aliases
autorevert filenotify hl-line diminish diff-hl vc-dir ewoc vc
vc-dispatcher diff-mode auto-highlight-symbol fancy-narrow easy-mmode
delsel info+ thingatpt undo-tree diff edmacro kmacro idle-require
mm-archive message format-spec rfc822 mml mml-sec mailabbrev gmm-utils
mailheader mm-decode mm-bodies mm-encode mail-utils network-stream
starttls url-http tls mail-parse rfc2231 rfc2047 rfc2045 ietf-drums
url-gw url-cache url-auth url url-proxy url-privacy url-expand
url-methods url-history url-cookie url-domsuf url-util mailcap
url-handlers url-parse auth-source eieio byte-opt bytecomp byte-compile
cconv eieio-core gnus-util mm-util mail-prsvr password-cache url-vars
epg finder-inf ace-jump-mode-autoloads tex-site bbdb-autoloads
boxquote-autoloads csv-mode-autoloads dictionary-autoloads
connection-autoloads diminish-autoloads dired-single-autoloads
fill-column-indicator-autoloads info easymenu fuzzy-autoloads
idle-require-autoloads interaction-log-autoloads lcs-autoloads
link-autoloads pager-autoloads pkg-info-autoloads epl-autoloads
rainbow-mode-autoloads tidy-autoloads shorten-autoloads
unbound-autoloads package epg-config advice help-fns cl-macs cl gv
cl-loaddefs cl-lib time-date tooltip electric uniquify ediff-hook
vc-hooks lisp-float-type mwheel dos-w32 ls-lisp w32-common-fns
disp-table w32-win w32-vars 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 w32notify w32 multi-tty emacs)

bug#19606: 24.4; Emacs hangs when editing a 5-line Org file

[Eli Zaretskii]

> From: Fabrice Niessen <fni@missioncriticalit.com>
> Date: Thu, 15 Jan 2015 15:26:33 +0100
> 
> With the following file -- and my configuration file (!):
> 
> --8<---------------cut here---------------start------------->8---
> #+TITLE:     ECM
> #+LANGUAGE:  en
> 
> #+PROPERTY:  eval yes
> 
> * Macro
> 
> Date at export time: /{{{time(%Y-%m-%d)}}}/.
> --8<---------------cut here---------------end--------------->8---
> 
> Emacs hangs when replacing "yes" by "no" for the "eval" property.
> 
> Recipe:
> - Put cursor after "yes"
> - Delete "yes"
> - Type "no"
> 
> Symptom: After "n", Emacs hangs, taking 100% of one CPU core.

Thanks, but what do you expect us to do with this report, without any
information whatsoever regarding your customizations?

FWIW, the backtrace says Emacs is spell-checking because you have
Flyspell mode enabled in that buffer.  But that's about all that can
be said using the information you provided.

bug#19606: 24.4; Emacs hangs when editing a 5-line Org file

[Fabrice Niessen]

Eli Zaretskii wrote:
>> From: Fabrice Niessen <fni-djc/iPCCuDYQheJpep6IedvLeJWuRmrY@public.gmane.org>
>> 
>> With the following file -- and my configuration file (!):
>> 
>> --8<---------------cut here---------------start------------->8---
>> #+TITLE:     ECM
>> #+LANGUAGE:  en
>> 
>> #+PROPERTY:  eval yes
>> 
>> * Macro
>> 
>> Date at export time: /{{{time(%Y-%m-%d)}}}/.
>> --8<---------------cut here---------------end--------------->8---
>> 
>> Emacs hangs when replacing "yes" by "no" for the "eval" property.
>> 
>> Recipe:
>> - Put cursor after "yes"
>> - Delete "yes"
>> - Type "no"
>> 
>> Symptom: After "n", Emacs hangs, taking 100% of one CPU core.
>
> Thanks, but what do you expect us to do with this report, without any
> information whatsoever regarding your customizations?

I thought that, thanks to the backtrace, you could find the culprit, or
reduce the scope of the search, as you often succeed to do.

> FWIW, the backtrace says Emacs is spell-checking because you have
> Flyspell mode enabled in that buffer.  But that's about all that can
> be said using the information you provided.

My current set of customizations is available at
https://github.com/fniessen/emacs-leuven/blob/master/emacs-leuven.el,
but it's so huge it won't help us.

If you have no idea, the only thing would be a dichotomy of my config
file, but that'll take a while.

Best regards,
Fabrice

bug#19606: 24.4; Emacs hangs when editing a 5-line Org file

[Eli Zaretskii]

> From: Fabrice Niessen <fni-news@pirilampo.org>
> Cc: 19606@debbugs.gnu.org
> Date: Thu, 15 Jan 2015 19:04:13 +0100
> 
> > Thanks, but what do you expect us to do with this report, without any
> > information whatsoever regarding your customizations?
> 
> I thought that, thanks to the backtrace, you could find the culprit, or
> reduce the scope of the search, as you often succeed to do.

But you didn't even show the backtrace from the main (a.k.a. "Lisp")
thread.  Your backtrace is from thread 15, whereas the main thread is
thread 1.  You need to type "thread 1" before "backtrace" to provide
the (possibly) interesting backtrace.

bug#19606: 24.4; Emacs hangs when editing a 5-line Org file

[Dmitry Gutov]

On 01/15/2015 09:14 PM, Eli Zaretskii wrote:

> But you didn't even show the backtrace from the main (a.k.a. "Lisp")
> thread.  Your backtrace is from thread 15, whereas the main thread is
> thread 1.

The output is from 'thread apply all backtrace', AFAICS.

On the other hand, it's not 'bt full' or `xbacktrace', which 
report-emacs-bug asks to call.

bug#19606: 24.4; Emacs hangs when editing a 5-line Org file

[Glenn Morris]

I just want to note that there seems to be a tendency to try and use gdb
to debug Org problems, when debug-on-quit and ctrl-g might work.

bug#19606: 24.4; Emacs hangs when editing a 5-line Org file

[Eli Zaretskii]

> Date: Fri, 16 Jan 2015 00:06:58 +0300
> From: Dmitry Gutov <dgutov@yandex.ru>
> CC: 19606@debbugs.gnu.org
> 
> On 01/15/2015 09:14 PM, Eli Zaretskii wrote:
> 
> > But you didn't even show the backtrace from the main (a.k.a. "Lisp")
> > thread.  Your backtrace is from thread 15, whereas the main thread is
> > thread 1.
> 
> The output is from 'thread apply all backtrace', AFAICS.

No, the output is only from threads 15 and 14.  The command "thread
apply all backtrace" was indeed issued, but Emacs crashed or exited
abnormally while producing the Lisp-level backtrace for thread 14:

  [Inferior 1 (process 1204) exited with code 01]
  (gdb) The program being debugged exited while in a function called from GDB.
  Evaluation of the expression containing the function
  (backtrace_top) will be abandoned.

Therefore that command didn't produce backtraces of the rest of the
threads.

The backtraces shown are not interesting: thread 15 is a thread
created by Windows for attaching the debugger, so it doesn't belong to
Emacs; and thread 14 is the file-notification thread started by
w32notify.c, which simply sleeps waiting for file events.  So the
interesting information from the main thread is not presented, and
it's therefore impossible to tell where and why Emacs hanged.

Typing "thread 1" explicitly right after attaching to the process
might have produce the C-level backtrace for the main thread.  It is a
good thing to do in any case when attaching to Emacs process that's in
trouble.

> On the other hand, it's not 'bt full' or `xbacktrace', which 
> report-emacs-bug asks to call.

"xbacktrace" is automatically called after the C-level backtrace, when
you start GDB from the Emacs's src directory, where .gdbinit file
arranges for that.  That's why you see this part in the OP:

  Lisp Backtrace:
  "redisplay_internal (C function)" (0x1407e78)
  "redisplay" (0x88f254)
  "sit-for" (0x88f3a8)
  "flyspell-check-word-p" (0x88f4f8)
  "byte-code" (0x88f610)
  "flyspell-post-command-hook" (0x88f844)

bug#19606: 24.4; Emacs hangs when editing a 5-line Org file

[Eli Zaretskii]

> From: Glenn Morris <rgm@gnu.org>
> Cc: Fabrice Niessen <fni-news@pirilampo.org>,  19606@debbugs.gnu.org
> Date: Thu, 15 Jan 2015 16:37:36 -0500
> 
> 
> I just want to note that there seems to be a tendency to try and use gdb
> to debug Org problems, when debug-on-quit and ctrl-g might work.

Very true.

bug#19606: 24.4; Emacs hangs when editing a 5-line Org file

[Fabrice Niessen]

Eli Zaretskii wrote:
>> From: Glenn Morris <rgm-mXXj517/zsQ@public.gmane.org>
>> Cc: Fabrice Niessen <fni-news-TA4HMoP+1wHrZ44/DZwexQ@public.gmane.org>,  19606-ubl+/3LiMTaZdePnXv/OxA@public.gmane.org
>> Date: Thu, 15 Jan 2015 16:37:36 -0500
>> 
>> 
>> I just want to note that there seems to be a tendency to try and use
>> gdb to debug Org problems, when debug-on-quit and ctrl-g might work.
>
> Very true.

As it doesn't seem obvious, let me state explicitly that C-g does
nothing; Emacs is hung and does not answer anymore to anything...

Is there an alternative to GDB in such cases?

Best regards,
Fabrice

bug#19606: 24.4; Emacs hangs when editing a 5-line Org file

[Fabrice Niessen]

Eli Zaretskii wrote:
>> Date: Fri, 16 Jan 2015 00:06:58 +0300
>> From: Dmitry Gutov <dgutov-o+MxOtu4lMCHXe+LvDLADg@public.gmane.org>
>> CC: 19606-ubl+/3LiMTaZdePnXv/OxA@public.gmane.org
>> 
>> On 01/15/2015 09:14 PM, Eli Zaretskii wrote:
>> 
>>> But you didn't even show the backtrace from the main (a.k.a. "Lisp")
>>> thread.  Your backtrace is from thread 15, whereas the main thread
>>> is thread 1.
>> 
>> The output is from 'thread apply all backtrace', AFAICS.
>
> No, the output is only from threads 15 and 14.  The command "thread
> apply all backtrace" was indeed issued, but Emacs crashed or exited
> abnormally while producing the Lisp-level backtrace for thread 14:
>
>   [Inferior 1 (process 1204) exited with code 01]
>   (gdb) The program being debugged exited while in a function called
>   from GDB.
>   Evaluation of the expression containing the function
>   (backtrace_top) will be abandoned.
>
> Therefore that command didn't produce backtraces of the rest of the
> threads.
>
> The backtraces shown are not interesting: thread 15 is a thread
> created by Windows for attaching the debugger, so it doesn't belong to
> Emacs; and thread 14 is the file-notification thread started by
> w32notify.c, which simply sleeps waiting for file events.  So the
> interesting information from the main thread is not presented, and
> it's therefore impossible to tell where and why Emacs hanged.
>
> Typing "thread 1" explicitly right after attaching to the process
> might have produce the C-level backtrace for the main thread.  It is a
> good thing to do in any case when attaching to Emacs process that's in
> trouble.
>
>> On the other hand, it's not 'bt full' or `xbacktrace', which 
>> report-emacs-bug asks to call.
>
> "xbacktrace" is automatically called after the C-level backtrace, when
> you start GDB from the Emacs's src directory, where .gdbinit file
> arranges for that.  That's why you see this part in the OP:
>
>   Lisp Backtrace:
>   "redisplay_internal (C function)" (0x1407e78)
>   "redisplay" (0x88f254)
>   "sit-for" (0x88f3a8)
>   "flyspell-check-word-p" (0x88f4f8)
>   "byte-code" (0x88f610)
>   "flyspell-post-command-hook" (0x88f844)

OK, so I just reproduced the problem once again, then:

- tried to C-g in Emacs: impossible!
- launched GDB
- source ~/.gdbinit
- thread 1
- thread apply all backtrace

Still, the backtrace is not as long as normal, and I don't get any GDB
prompt anymore!

I tried to C-c in the shell window, as well without success...

What can I do to provide you with more context?

Best regards,
Fabrice

bug#19606: 24.4; Emacs hangs when editing a 5-line Org file

[Fabrice Niessen]

Fabrice Niessen wrote:
> OK, so I just reproduced the problem once again, then:
>
> - tried to C-g in Emacs: impossible!
> - launched GDB
> - source ~/.gdbinit
> - thread 1
> - thread apply all backtrace
>
> Still, the backtrace is not as long as normal, and I don't get any GDB
> prompt anymore!
>
> I tried to C-c in the shell window, as well without success...
>
> What can I do to provide you with more context?

You can see all those steps on the video
http://screencast.com/t/umVUFo6h6toS.

bug#19606: 24.4; Emacs hangs when editing a 5-line Org file

[Eli Zaretskii]

> From: Fabrice Niessen <fni-news@pirilampo.org>
> Cc: 19606@debbugs.gnu.org
> Date: Fri, 16 Jan 2015 12:16:26 +0100
> 
> Eli Zaretskii wrote:
> >> From: Glenn Morris <rgm@gnu.org>
> >> Cc: Fabrice Niessen <fni-news@pirilampo.org>,  19606@debbugs.gnu.org
> >> Date: Thu, 15 Jan 2015 16:37:36 -0500
> >> 
> >> 
> >> I just want to note that there seems to be a tendency to try and use
> >> gdb to debug Org problems, when debug-on-quit and ctrl-g might work.
> >
> > Very true.
> 
> As it doesn't seem obvious, let me state explicitly that C-g does
> nothing;

With or without setting debug-on-quit non-nil?

> Is there an alternative to GDB in such cases?

No.

bug#19606: 24.4; Emacs hangs when editing a 5-line Org file

[Eli Zaretskii]

> From: Fabrice Niessen <fni-news@pirilampo.org>
> Cc: 19606@debbugs.gnu.org
> Date: Fri, 16 Jan 2015 12:27:16 +0100
> 
> OK, so I just reproduced the problem once again, then:
> 
> - tried to C-g in Emacs: impossible!
> - launched GDB
> - source ~/.gdbinit
> - thread 1
> - thread apply all backtrace
> 
> Still, the backtrace is not as long as normal, and I don't get any GDB
> prompt anymore!

Can you show what this produced.

> I tried to C-c in the shell window, as well without success...
> 
> What can I do to provide you with more context?

Try this instead:

 - reproduce the problem
 - attach GDB, but do NOT "source ~/.gdbinit"
 - thread 1
 - backtrace

bug#19606: 24.4; Emacs hangs when editing a 5-line Org file

[Fabrice Niessen]

Eli Zaretskii wrote:
>> From: Fabrice Niessen <fni-news-TA4HMoP+1wHrZ44/DZwexQ@public.gmane.org>
>> Cc: 19606-ubl+/3LiMTaZdePnXv/OxA@public.gmane.org
>> Date: Fri, 16 Jan 2015 12:16:26 +0100
>> 
>> Eli Zaretskii wrote:
>>>> From: Glenn Morris <rgm-mXXj517/zsQ@public.gmane.org>
>>>> Cc: Fabrice Niessen <fni-news-TA4HMoP+1wHrZ44/DZwexQ@public.gmane.org>,  19606-ubl+/3LiMTaZdePnXv/OxA@public.gmane.org
>>>> Date: Thu, 15 Jan 2015 16:37:36 -0500
>>>> 
>>>> I just want to note that there seems to be a tendency to try and use
>>>> gdb to debug Org problems, when debug-on-quit and ctrl-g might work.
>>>
>>> Very true.
>> 
>> As it doesn't seem obvious, let me state explicitly that C-g does
>> nothing;
>
> With or without setting debug-on-quit non-nil?

In both cases.

bug#19606: 24.4; Emacs hangs when editing a 5-line Org file

[Fabrice Niessen]

Eli Zaretskii wrote:
>> From: Fabrice Niessen <fni-news-TA4HMoP+1wHrZ44/DZwexQ@public.gmane.org>
>> Cc: 19606-ubl+/3LiMTaZdePnXv/OxA@public.gmane.org
>> Date: Fri, 16 Jan 2015 12:27:16 +0100
>> 
>> OK, so I just reproduced the problem once again, then:
>> 
>> - tried to C-g in Emacs: impossible!
>> - launched GDB
>> - source ~/.gdbinit
>> - thread 1
>> - thread apply all backtrace
>> 
>> Still, the backtrace is not as long as normal, and I don't get any GDB
>> prompt anymore!
>
> Can you show what this produced.

It's in the video, but I forgot to copy it.

I just re-did the ABOVE for a new Emacs session, to get something
similar to the results in the video.

--8<---------------cut here---------------start------------->8---
$ gdb -p 5676
GNU gdb (GDB) 7.8
Copyright (C) 2014 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "i686-pc-cygwin".
Type "show configuration" for configuration details.
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>.
Find the GDB manual and other documentation resources online at:
<http://www.gnu.org/software/gdb/documentation/>.
For help, type "help".
Type "apropos word" to search for commands related to "word".
/cygdrive/d/Users/fni/.gdbinit:19: Error in sourced command file:
No symbol table is loaded.  Use the "file" command.
Attaching to process 5676
[New Thread 5676.0x4bbc]
[New Thread 5676.0x4b30]
[New Thread 5676.0x3374]
[New Thread 5676.0x1878]
[New Thread 5676.0x4634]
[New Thread 5676.0x61b0]
[New Thread 5676.0x2564]
[New Thread 5676.0x2d4c]
[New Thread 5676.0x155c]
[New Thread 5676.0x4ac0]
[New Thread 5676.0x5998]
[New Thread 5676.0x4be4]
[New Thread 5676.0x369c]
[New Thread 5676.0x3c7c]
Reading symbols from /cygdrive/c/Program Files (x86)/emacs-24.4/bin/emacs.exe...done.
0x77d3f925 in ntdll!DbgBreakPoint ()
   from /cygdrive/c/Windows/SYSTEM32/ntdll.dll
(gdb) source ~/.gdbinit
Warning: /cygdrive/c/Program Files (x86)/emacs-24.4/bin/../lwlib: No such file or directory.
SIGINT is used by the debugger.
Are you sure you want to change it? (y or n) [answered Y; input not from terminal]
Environment variable "DISPLAY" not defined.
TERM = xterm-256color
Breakpoint 1 at 0x109436d: file ../../emacs-24.4/src/emacs.c, line 350.
Temporary breakpoint 2 at 0x10aa8ce: file ../../emacs-24.4/src/sysdep.c, line 850.
(gdb) thread 1
[Switching to thread 1 (Thread 5676.0x4bbc)]
#0  find_interval (tree=0x6d129a4, position=138)
    at ../../emacs-24.4/src/intervals.c:690
(gdb) 690       ../../emacs-24.4/src/intervals.c: No such file or directory.

[Switching to thread 1 (Thread 5676.0x4bbc)]
#0  find_interval (tree=0x6d129a4, position=138)
    at ../../emacs-24.4/src/intervals.c:690
690     in ../../emacs-24.4/src/intervals.c
(gdb) thread apply all backtrace

Thread 14 (Thread 5676.0x3c7c):
#0  0x77d3f925 in ntdll!DbgBreakPoint ()
   from /cygdrive/c/Windows/SYSTEM32/ntdll.dll
#1  0x77dadb8c in ntdll!DbgUiRemoteBreakin ()
   from /cygdrive/c/Windows/SYSTEM32/ntdll.dll
#2  0x95b35457 in ?? ()
#3  0x00000000 in ?? ()

Lisp Backtrace:
"redisplay_internal (C function)" (0x1407e78)
"redisplay" (0x88f254)
"sit-for" (0x88f3a8)
"flyspell-check-word-p" (0x88f4f8)
"byte-code" (0x88f610)
"flyspell-post-command-hook" (0x88f844)

Thread 13 (Thread 5676.0x369c):
#0  0x77d3de5c in ntdll!ZwDelayExecution ()
   from /cygdrive/c/Windows/SYSTEM32/ntdll.dll
#1  0x755311f8 in SleepEx () from /cygdrive/c/Windows/SYSTEM32/KERNELBASE.dll
#2  0x00000001 in ?? ()
#3  0x6f5aff20 in ?? ()
#4  0x0114ab1e in watch_worker (arg=0x3bf5c00)
    at ../../emacs-24.4/src/w32notify.c:278
#5  0x775b86e3 in KERNEL32!BaseThreadInitThunk ()
   from /cygdrive/c/Windows/SYSTEM32/KERNEL32.DLL
#6  0x77d6be19 in ntdll!RtlInitializeExceptionChain ()
   from /cygdrive/c/Windows/SYSTEM32/ntdll.dll
#7  0x77d6bdec in ntdll!RtlInitializeExceptionChain ()
   from /cygdrive/c/Windows/SYSTEM32/ntdll.dll
#8  0x00000000 in ?? ()
[Thread 5676.0x3c7c exited with code 0]
--8<---------------cut here---------------end--------------->8---

>> I tried to C-c in the shell window, as well without success...
>> 
>> What can I do to provide you with more context?
>
> Try this instead:
>
>  - reproduce the problem
>  - attach GDB, but do NOT "source ~/.gdbinit"
>  - thread 1
>  - backtrace

Here is it (http://screencast.com/t/o9BVgY7hWN):

--8<---------------cut here---------------start------------->8---
$ gdb -p 17252
GNU gdb (GDB) 7.8
Copyright (C) 2014 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "i686-pc-cygwin".
Type "show configuration" for configuration details.
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>.
Find the GDB manual and other documentation resources online at:
<http://www.gnu.org/software/gdb/documentation/>.
For help, type "help".
Type "apropos word" to search for commands related to "word".
/cygdrive/d/Users/fni/.gdbinit:19: Error in sourced command file:
No symbol table is loaded.  Use the "file" command.
Attaching to process 17252
[New Thread 17252.0x44f0]
[New Thread 17252.0x1404]
[New Thread 17252.0x1658]
[New Thread 17252.0x53ac]
[New Thread 17252.0x5634]
[New Thread 17252.0xd54]
[New Thread 17252.0x485c]
[New Thread 17252.0x4e34]
[New Thread 17252.0x3484]
[New Thread 17252.0x3f3c]
[New Thread 17252.0xe38]
[New Thread 17252.0x1730]
[New Thread 17252.0x10dc]
[New Thread 17252.0x5fc0]
[New Thread 17252.0x38a8]
Reading symbols from /cygdrive/c/Program Files (x86)/emacs-24.4/bin/emacs.exe...done.
0x77d3f925 in ntdll!DbgBreakPoint ()
   from /cygdrive/c/Windows/SYSTEM32/ntdll.dll
(gdb) thread 1
[Switching to thread 1 (Thread 17252.0x44f0)]
#0  0x01142191 in Fnext_single_property_change (position=position@entry=540,
    prop=62947906, object=118795585, limit=limit@entry=1356)
    at ../../emacs-24.4/src/textprop.c:1034
1034    ../../emacs-24.4/src/textprop.c: No such file or directory.
(gdb) backtrace
#0  0x01142191 in Fnext_single_property_change (position=position@entry=540,
    prop=62947906, object=118795585, limit=limit@entry=1356)
    at ../../emacs-24.4/src/textprop.c:1034
#1  0x0102e54f in handle_invisible_prop (it=0x889a14)
    at ../../emacs-24.4/src/xdisp.c:4379
#2  0x01022e18 in handle_stop (it=it@entry=0x889a14)
    at ../../emacs-24.4/src/xdisp.c:3478
#3  0x010231e9 in next_element_from_string (it=0x889a14)
    at ../../emacs-24.4/src/xdisp.c:7915
#4  0x01025e1c in get_next_display_element (it=it@entry=0x889a14)
    at ../../emacs-24.4/src/xdisp.c:6925
#5  0x0102b00f in display_line (it=<optimized out>)
    at ../../emacs-24.4/src/xdisp.c:20183
#6  0x00000000 in ?? ()
(gdb)
--8<---------------cut here---------------end--------------->8---

bug#19606: 24.4; Emacs hangs when editing a 5-line Org file

[Eli Zaretskii]

> From: Fabrice Niessen <fni-news@pirilampo.org>
> Cc: dgutov@yandex.ru,  19606@debbugs.gnu.org
> Date: Fri, 16 Jan 2015 13:04:00 +0100
> 
> (gdb) thread 1
> [Switching to thread 1 (Thread 17252.0x44f0)]
> #0  0x01142191 in Fnext_single_property_change (position=position@entry=540,
>     prop=62947906, object=118795585, limit=limit@entry=1356)
>     at ../../emacs-24.4/src/textprop.c:1034
> 1034    ../../emacs-24.4/src/textprop.c: No such file or directory.
> (gdb) backtrace
> #0  0x01142191 in Fnext_single_property_change (position=position@entry=540,
>     prop=62947906, object=118795585, limit=limit@entry=1356)
>     at ../../emacs-24.4/src/textprop.c:1034
> #1  0x0102e54f in handle_invisible_prop (it=0x889a14)
>     at ../../emacs-24.4/src/xdisp.c:4379
> #2  0x01022e18 in handle_stop (it=it@entry=0x889a14)
>     at ../../emacs-24.4/src/xdisp.c:3478
> #3  0x010231e9 in next_element_from_string (it=0x889a14)
>     at ../../emacs-24.4/src/xdisp.c:7915
> #4  0x01025e1c in get_next_display_element (it=it@entry=0x889a14)
>     at ../../emacs-24.4/src/xdisp.c:6925
> #5  0x0102b00f in display_line (it=<optimized out>)
>     at ../../emacs-24.4/src/xdisp.c:20183
> #6  0x00000000 in ?? ()

Looks like an infloop due to display or overlay strings with text
properties.  Can you reproduce this in an unoptimized build?

bug#19606: 24.4; Emacs hangs when editing a 5-line Org file

[Fabrice Niessen]

Eli Zaretskii wrote:>> From: Fabrice Niessen <fni-news-TA4HMoP+1wHrZ44/DZwexQ@public.gmane.org>
>> Cc: dgutov-o+MxOtu4lMCHXe+LvDLADg@public.gmane.org,  19606-ubl+/3LiMTaZdePnXv/OxA@public.gmane.org
>> Date: Fri, 16 Jan 2015 13:04:00 +0100
>> 
>> (gdb) thread 1
>> [Switching to thread 1 (Thread 17252.0x44f0)]
>> #0  0x01142191 in Fnext_single_property_change (position=position@entry=540,
>>     prop=62947906, object=118795585, limit=limit@entry=1356)
>>     at ../../emacs-24.4/src/textprop.c:1034
>> 1034    ../../emacs-24.4/src/textprop.c: No such file or directory.
>> (gdb) backtrace
>> #0  0x01142191 in Fnext_single_property_change (position=position@entry=540,
>>     prop=62947906, object=118795585, limit=limit@entry=1356)
>>     at ../../emacs-24.4/src/textprop.c:1034
>> #1  0x0102e54f in handle_invisible_prop (it=0x889a14)
>>     at ../../emacs-24.4/src/xdisp.c:4379
>> #2  0x01022e18 in handle_stop (it=it@entry=0x889a14)
>>     at ../../emacs-24.4/src/xdisp.c:3478
>> #3  0x010231e9 in next_element_from_string (it=0x889a14)
>>     at ../../emacs-24.4/src/xdisp.c:7915
>> #4  0x01025e1c in get_next_display_element (it=it@entry=0x889a14)
>>     at ../../emacs-24.4/src/xdisp.c:6925
>> #5  0x0102b00f in display_line (it=<optimized out>)
>>     at ../../emacs-24.4/src/xdisp.c:20183
>> #6  0x00000000 in ?? ()
>
> Looks like an infloop due to display or overlay strings with text
> properties.  Can you reproduce this in an unoptimized build?

Sure, if you can point me to such a version I can download.

Best regards,
Fabrice

bug#19606: 24.4; Emacs hangs when editing a 5-line Org file

[Eli Zaretskii]

> From: Fabrice Niessen <fni-news@pirilampo.org>
> Cc: dgutov@yandex.ru,  19606@debbugs.gnu.org
> Date: Fri, 16 Jan 2015 19:31:38 +0100
> 
> > Looks like an infloop due to display or overlay strings with text
> > properties.  Can you reproduce this in an unoptimized build?
> 
> Sure, if you can point me to such a version I can download.

Sorry, I don't.  But maybe someone else does.

bug#19606: 24.4; Emacs hangs when editing a 5-line Org file

[Glenn Morris]

The alternative is to supply a minimum reproducible recipe starting with
emacs -Q, then someone else can debug it.

BTW, it's a nice gesture to provide screencasts, but I don't think
anyone developing Emacs finds them particularly useful for debugging, so
no need to keep providing those AFAICS.

bug#19606: 24.4; Emacs hangs when editing a 5-line Org file

[Dani Moncayo]

> > Looks like an infloop due to display or overlay strings with text
> > properties.  Can you reproduce this in an unoptimized build?
>
> Sure, if you can point me to such a version I can download.

https://sourceforge.net/projects/emacs-bin/files/snapshots/debug/

HTH

-- 
Dani Moncayo

bug#19606: 24.4; Emacs hangs when editing a 5-line Org file

[Fabrice Niessen]

Eli Zaretskii wrote:
>> From: Fabrice Niessen <fni-news-TA4HMoP+1wHrZ44/DZwexQ@public.gmane.org>
>> Cc: dgutov-o+MxOtu4lMCHXe+LvDLADg@public.gmane.org,  19606-ubl+/3LiMTaZdePnXv/OxA@public.gmane.org
>> Date: Fri, 16 Jan 2015 13:04:00 +0100
>> 
>> (gdb) thread 1
>> [Switching to thread 1 (Thread 17252.0x44f0)]
>> #0  0x01142191 in Fnext_single_property_change (position=position@entry=540,
>>     prop=62947906, object=118795585, limit=limit@entry=1356)
>>     at ../../emacs-24.4/src/textprop.c:1034
>> 1034    ../../emacs-24.4/src/textprop.c: No such file or directory.
>> (gdb) backtrace
>> #0  0x01142191 in Fnext_single_property_change (position=position@entry=540,
>>     prop=62947906, object=118795585, limit=limit@entry=1356)
>>     at ../../emacs-24.4/src/textprop.c:1034
>> #1  0x0102e54f in handle_invisible_prop (it=0x889a14)
>>     at ../../emacs-24.4/src/xdisp.c:4379
>> #2  0x01022e18 in handle_stop (it=it@entry=0x889a14)
>>     at ../../emacs-24.4/src/xdisp.c:3478
>> #3  0x010231e9 in next_element_from_string (it=0x889a14)
>>     at ../../emacs-24.4/src/xdisp.c:7915
>> #4  0x01025e1c in get_next_display_element (it=it@entry=0x889a14)
>>     at ../../emacs-24.4/src/xdisp.c:6925
>> #5  0x0102b00f in display_line (it=<optimized out>)
>>     at ../../emacs-24.4/src/xdisp.c:20183
>> #6  0x00000000 in ?? ()
>
> Looks like an infloop due to display or overlay strings with text
> properties.  Can you reproduce this in an unoptimized build?

Here it is (with GNU Emacs 25.0.50.1 (i686-pc-mingw32) of 2015-01-28 on
LEG570):

--8<---------------cut here---------------start------------->8---
$ gdb -p 8340
GNU gdb (GDB) 7.8
Copyright (C) 2014 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "i686-pc-cygwin".
Type "show configuration" for configuration details.
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>.
Find the GDB manual and other documentation resources online at:
<http://www.gnu.org/software/gdb/documentation/>.
For help, type "help".
Type "apropos word" to search for commands related to "word".
/cygdrive/d/Users/fni/.gdbinit:19: Error in sourced command file:
No symbol table is loaded.  Use the "file" command.
Attaching to process 8340
[New Thread 8340.0x2568]
[New Thread 8340.0x32f0]
[New Thread 8340.0x1b00]
[New Thread 8340.0x2860]
[New Thread 8340.0x2244]
[New Thread 8340.0xfdc]
[New Thread 8340.0x2d04]
[New Thread 8340.0x2288]
[New Thread 8340.0x4fc]
[New Thread 8340.0x29a8]
[New Thread 8340.0x1980]
[New Thread 8340.0x3b68]
[New Thread 8340.0x1030]
[New Thread 8340.0x36b0]
Reading symbols from /cygdrive/c/Program Files (x86)/emacs-trunk/bin/emacs.exe...done.
0x7758f925 in ntdll!DbgBreakPoint () from /cygdrive/c/Windows/SYSTEM32/ntdll.dll
(gdb) thread 1
[Switching to thread 1 (Thread 8340.0x2568)]
#0  0x01101915 in XSTRING (a=168379948) at C:/emacs/repo/src/lisp.h:974
(gdb) 974       C:/emacs/repo/src/lisp.h: No such file or directory.
backtrace
#0  0x01101915 in XSTRING (a=168379948) at C:/emacs/repo/src/lisp.h:974
#1  0x01103beb in set_string_intervals (s=168379948, i=0xe3f8b54) at C:/emacs/repo/src/lisp.h:3419
#2  0x01200220 in balance_possible_root_interval (interval=0xe3f8b54) at C:/emacs/repo/src/intervals.c:492
#3  0x01200726 in find_interval (tree=0xe3f8b54, position=135) at C:/emacs/repo/src/intervals.c:676
#4  0x01205d13 in validate_interval_range (object=168379948, begin=0x88b320, end=0x88b320, force=false) at C:/emacs/repo/src/textprop.c:194
#5  0x0120881d in Fnext_single_property_change (position=542, prop=18880, object=168379948, limit=1358) at C:/emacs/repo/src/textprop.c:1029
#6  0x01031bdf in handle_invisible_prop (it=0x88c0b0) at C:/emacs/repo/src/xdisp.c:4280
#7  0x0102fa80 in handle_stop (it=0x88c0b0) at C:/emacs/repo/src/xdisp.c:3377
#8  0x0103b998 in next_element_from_string (it=0x88c0b0) at C:/emacs/repo/src/xdisp.c:7803
#9  0x01039412 in get_next_display_element (it=0x88c0b0) at C:/emacs/repo/src/xdisp.c:6835
#10 0x01063121 in display_line (it=0x88c0b0) at C:/emacs/repo/src/xdisp.c:20151
#11 0x01057332 in try_window (window=24604037, pos=..., flags=1) at C:/emacs/repo/src/xdisp.c:16911
#12 0x010540b3 in redisplay_window (window=24604037, just_this_one_p=true) at C:/emacs/repo/src/xdisp.c:16384
#13 0x0104c66b in redisplay_window_1 (window=24604037) at C:/emacs/repo/src/xdisp.c:14216
#14 0x0119e4c4 in internal_condition_case_1 (bfun=0x104c635 <redisplay_window_1>, arg=24604037, handlers=22582667, hfun=0x104c5c3 <redisplay_window_error>) at C:/emacs/repo/src/eval.c:1359
#15 0x0104b9c8 in redisplay_internal () at C:/emacs/repo/src/xdisp.c:13859
#16 0x0104bfb1 in redisplay_preserve_echo_area (from_where=2) at C:/emacs/repo/src/xdisp.c:14045
#17 0x0100faf8 in Fredisplay (force=0) at C:/emacs/repo/src/dispnew.c:5796
#18 0x011a18ba in Ffuncall (nargs=1, args=0x88edd0) at C:/emacs/repo/src/eval.c:2705
#19 0x011e55cf in exec_byte_code (bytestr=19592252, vector=19592269, maxdepth=30, args_template=3078, nargs=1, args=0x88f0fc) at C:/emacs/repo/src/bytecode.c:919
#20 0x011a21b2 in funcall_lambda (fun=19592229, nargs=1, arg_vector=0x88f0f8) at C:/emacs/repo/src/eval.c:2872
#21 0x011a1b4d in Ffuncall (nargs=2, args=0x88f0f4) at C:/emacs/repo/src/eval.c:2754
#22 0x011e55cf in exec_byte_code (bytestr=158475268, vector=165805669, maxdepth=10, args_template=0, nargs=0, args=0x0) at C:/emacs/repo/src/bytecode.c:919
#23 0x011a25dd in funcall_lambda (fun=165805749, nargs=0, arg_vector=0x9e1fe65) at C:/emacs/repo/src/eval.c:2938
#24 0x011a1b4d in Ffuncall (nargs=1, args=0x88f414) at C:/emacs/repo/src/eval.c:2754
#25 0x011e55cf in exec_byte_code (bytestr=158488652, vector=165806149, maxdepth=18, args_template=0, nargs=0, args=0x0) at C:/emacs/repo/src/bytecode.c:919
#26 0x011a25dd in funcall_lambda (fun=165806269, nargs=0, arg_vector=0x9e20045) at C:/emacs/repo/src/eval.c:2938
#27 0x011a1b4d in Ffuncall (nargs=1, args=0x88f750) at C:/emacs/repo/src/eval.c:2754
#28 0x011a1389 in call0 (fn=161383744) at C:/emacs/repo/src/eval.c:2552
#29 0x0110bde6 in safe_run_hooks_1 (nargs=2, args=0x88f7c8) at C:/emacs/repo/src/keyboard.c:1834
#30 0x0119e712 in internal_condition_case_n (bfun=0x110bda1 <safe_run_hooks_1>, nargs=2, args=0x88f7c8, handlers=30496, hfun=0x110bde8 <safe_run_hooks_error>) at C:/emacs/repo/src/eval.c:1417
#31 0x0110c1af in safe_run_hook_funcall (nargs=2, args=0x88f864) at C:/emacs/repo/src/keyboard.c:1882
#32 0x011a1269 in run_hook_with_args (nargs=2, args=0x88f864, funcall=0x110c136 <safe_run_hook_funcall>) at C:/emacs/repo/src/eval.c:2516
#33 0x0110c219 in safe_run_hooks (hook=25408) at C:/emacs/repo/src/keyboard.c:1900
#34 0x0110ad73 in command_loop_1 () at C:/emacs/repo/src/keyboard.c:1535
#35 0x0119e3ab in internal_condition_case (bfun=0x110a4eb <command_loop_1>, handlers=12064, hfun=0x1109be5 <cmd_error>) at C:/emacs/repo/src/eval.c:1335
#36 0x0110a126 in command_loop_2 (ignore=0) at C:/emacs/repo/src/keyboard.c:1139
#37 0x0119d8e6 in internal_catch (tag=31584, func=0x110a0fb <command_loop_2>, arg=0) at C:/emacs/repo/src/eval.c:1095
#38 0x0110a0c5 in command_loop () at C:/emacs/repo/src/keyboard.c:1118
#39 0x01109745 in recursive_edit_1 () at C:/emacs/repo/src/keyboard.c:728
#40 0x01109937 in Frecursive_edit () at C:/emacs/repo/src/keyboard.c:799
#41 0x011078a1 in main (argc=1, argv=0xc515a0) at C:/emacs/repo/src/emacs.c:1607
(gdb)
--8<---------------cut here---------------end--------------->8---

Is that what you need?

bug#19606: 24.4; Emacs hangs when editing a 5-line Org file

[Eli Zaretskii]

> From: Fabrice Niessen <fni-news@pirilampo.org>
> Cc: dgutov@yandex.ru,  19606@debbugs.gnu.org
> Date: Fri, 30 Jan 2015 17:07:13 +0100
> 
> (gdb) thread 1
> [Switching to thread 1 (Thread 8340.0x2568)]
> #0  0x01101915 in XSTRING (a=168379948) at C:/emacs/repo/src/lisp.h:974
> (gdb) 974       C:/emacs/repo/src/lisp.h: No such file or directory.
> backtrace
> #0  0x01101915 in XSTRING (a=168379948) at C:/emacs/repo/src/lisp.h:974
> #1  0x01103beb in set_string_intervals (s=168379948, i=0xe3f8b54) at C:/emacs/repo/src/lisp.h:3419
> #2  0x01200220 in balance_possible_root_interval (interval=0xe3f8b54) at C:/emacs/repo/src/intervals.c:492
> #3  0x01200726 in find_interval (tree=0xe3f8b54, position=135) at C:/emacs/repo/src/intervals.c:676
> #4  0x01205d13 in validate_interval_range (object=168379948, begin=0x88b320, end=0x88b320, force=false) at C:/emacs/repo/src/textprop.c:194
> #5  0x0120881d in Fnext_single_property_change (position=542, prop=18880, object=168379948, limit=1358) at C:/emacs/repo/src/textprop.c:1029
> #6  0x01031bdf in handle_invisible_prop (it=0x88c0b0) at C:/emacs/repo/src/xdisp.c:4280
> #7  0x0102fa80 in handle_stop (it=0x88c0b0) at C:/emacs/repo/src/xdisp.c:3377
> #8  0x0103b998 in next_element_from_string (it=0x88c0b0) at C:/emacs/repo/src/xdisp.c:7803
> #9  0x01039412 in get_next_display_element (it=0x88c0b0) at C:/emacs/repo/src/xdisp.c:6835
> #10 0x01063121 in display_line (it=0x88c0b0) at C:/emacs/repo/src/xdisp.c:20151
> #11 0x01057332 in try_window (window=24604037, pos=..., flags=1) at C:/emacs/repo/src/xdisp.c:16911
> #12 0x010540b3 in redisplay_window (window=24604037, just_this_one_p=true) at C:/emacs/repo/src/xdisp.c:16384
> #13 0x0104c66b in redisplay_window_1 (window=24604037) at C:/emacs/repo/src/xdisp.c:14216
> #14 0x0119e4c4 in internal_condition_case_1 (bfun=0x104c635 <redisplay_window_1>, arg=24604037, handlers=22582667, hfun=0x104c5c3 <redisplay_window_error>) at C:/emacs/repo/src/eval.c:1359
> #15 0x0104b9c8 in redisplay_internal () at C:/emacs/repo/src/xdisp.c:13859
> #16 0x0104bfb1 in redisplay_preserve_echo_area (from_where=2) at C:/emacs/repo/src/xdisp.c:14045
> #17 0x0100faf8 in Fredisplay (force=0) at C:/emacs/repo/src/dispnew.c:5796
> #18 0x011a18ba in Ffuncall (nargs=1, args=0x88edd0) at C:/emacs/repo/src/eval.c:2705
> #19 0x011e55cf in exec_byte_code (bytestr=19592252, vector=19592269, maxdepth=30, args_template=3078, nargs=1, args=0x88f0fc) at C:/emacs/repo/src/bytecode.c:919
> #20 0x011a21b2 in funcall_lambda (fun=19592229, nargs=1, arg_vector=0x88f0f8) at C:/emacs/repo/src/eval.c:2872
> #21 0x011a1b4d in Ffuncall (nargs=2, args=0x88f0f4) at C:/emacs/repo/src/eval.c:2754
> #22 0x011e55cf in exec_byte_code (bytestr=158475268, vector=165805669, maxdepth=10, args_template=0, nargs=0, args=0x0) at C:/emacs/repo/src/bytecode.c:919
> #23 0x011a25dd in funcall_lambda (fun=165805749, nargs=0, arg_vector=0x9e1fe65) at C:/emacs/repo/src/eval.c:2938
> #24 0x011a1b4d in Ffuncall (nargs=1, args=0x88f414) at C:/emacs/repo/src/eval.c:2754
> #25 0x011e55cf in exec_byte_code (bytestr=158488652, vector=165806149, maxdepth=18, args_template=0, nargs=0, args=0x0) at C:/emacs/repo/src/bytecode.c:919
> #26 0x011a25dd in funcall_lambda (fun=165806269, nargs=0, arg_vector=0x9e20045) at C:/emacs/repo/src/eval.c:2938
> #27 0x011a1b4d in Ffuncall (nargs=1, args=0x88f750) at C:/emacs/repo/src/eval.c:2754
> #28 0x011a1389 in call0 (fn=161383744) at C:/emacs/repo/src/eval.c:2552
> #29 0x0110bde6 in safe_run_hooks_1 (nargs=2, args=0x88f7c8) at C:/emacs/repo/src/keyboard.c:1834
> #30 0x0119e712 in internal_condition_case_n (bfun=0x110bda1 <safe_run_hooks_1>, nargs=2, args=0x88f7c8, handlers=30496, hfun=0x110bde8 <safe_run_hooks_error>) at C:/emacs/repo/src/eval.c:1417
> #31 0x0110c1af in safe_run_hook_funcall (nargs=2, args=0x88f864) at C:/emacs/repo/src/keyboard.c:1882
> #32 0x011a1269 in run_hook_with_args (nargs=2, args=0x88f864, funcall=0x110c136 <safe_run_hook_funcall>) at C:/emacs/repo/src/eval.c:2516
> #33 0x0110c219 in safe_run_hooks (hook=25408) at C:/emacs/repo/src/keyboard.c:1900
> #34 0x0110ad73 in command_loop_1 () at C:/emacs/repo/src/keyboard.c:1535
> #35 0x0119e3ab in internal_condition_case (bfun=0x110a4eb <command_loop_1>, handlers=12064, hfun=0x1109be5 <cmd_error>) at C:/emacs/repo/src/eval.c:1335
> #36 0x0110a126 in command_loop_2 (ignore=0) at C:/emacs/repo/src/keyboard.c:1139
> #37 0x0119d8e6 in internal_catch (tag=31584, func=0x110a0fb <command_loop_2>, arg=0) at C:/emacs/repo/src/eval.c:1095
> #38 0x0110a0c5 in command_loop () at C:/emacs/repo/src/keyboard.c:1118
> #39 0x01109745 in recursive_edit_1 () at C:/emacs/repo/src/keyboard.c:728
> #40 0x01109937 in Frecursive_edit () at C:/emacs/repo/src/keyboard.c:799
> #41 0x011078a1 in main (argc=1, argv=0xc515a0) at C:/emacs/repo/src/emacs.c:1607
> (gdb)
> --8<---------------cut here---------------end--------------->8---
> 
> Is that what you need?

Yes, thanks.  Unfortunately, it doesn't say more than the previous
backtrace: Emacs is displaying some display string with invisible
property.  Why that would lead to an infloop, I don't see.

My suggestion at this point would be to ask on the Org list whether
your Org-related setup that triggers this (somehow related to flyspell
mode) might be the problem.  It could be that the infloop is actually
on the Lisp level in some code that is part of Org or your
customizations.

Failing that, I suggest to try to present a minimal reproduction
recipe and post it here.

Thanks.

bug#19606: 24.4; Emacs hangs when editing a 5-line Org file

[Glenn Morris]

Eli Zaretskii wrote:

> Yes, thanks.  Unfortunately, it doesn't say more than the previous
> backtrace: Emacs is displaying some display string with invisible
> property.  Why that would lead to an infloop, I don't see.
>
> My suggestion at this point would be to ask on the Org list whether
> your Org-related setup that triggers this (somehow related to flyspell
> mode) might be the problem.  It could be that the infloop is actually
> on the Lisp level in some code that is part of Org or your
> customizations.
>
> Failing that, I suggest to try to present a minimal reproduction
> recipe and post it here.

Closing after 2 years with no further progress.