Re: bug#18785: 24.4.1; Emacs hangs with Org mode when point is in LOGBOOK

[Fabrice Niessen <fni-news-TA4HMoP+1wHrZ44/DZwexQ@public.gmane.org>]

Eli Zaretskii wrote:
>> From: Fabrice Niessen <fni-news-TA4HMoP+1wHrZ44/DZwexQ@public.gmane.org>
>> Cc: 18785-ubl+/3LiMTaZdePnXv/OxA@public.gmane.org, Org-mode List <emacs-orgmode-mXXj517/zsQ@public.gmane.org>
>> Date: Wed, 22 Oct 2014 12:35:30 +0200
>> 
>> I reproduced the problem.
>> 
>> Then, I tried (multiple times) to C-z in the GDB session, but nothing
>> happens: Emacs stays block and I don't get any GDB prompt.
>> 
>> Am I missing something?
>
> The C-z trick doesn't work on Windows.

That may be worth to mention it in the document?

> So instead run Emacs normally, reproduce the problem, and then attach
> the debugger to the running Emacs with "gdb -p PID", where PID is the
> numerical process ID of Emacs.  Then switch to thread 1, and do what
> etc/DEBUG says about "finish".

OK. Just did it.

--8<---------------cut here---------------start------------->8---
$ gdb -p 2888
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.
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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:
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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 2888
[New Thread 2888.0x233c]
[New Thread 2888.0x2894]
[New Thread 2888.0x31a4]
[New Thread 2888.0x1d60]
[New Thread 2888.0x35c]
[New Thread 2888.0x1e2c]
[New Thread 2888.0x1cc8]
[New Thread 2888.0x1f6c]
[New Thread 2888.0x1a54]
[New Thread 2888.0x1cd4]
[New Thread 2888.0x2388]
[New Thread 2888.0x2930]
[New Thread 2888.0x664]
[New Thread 2888.0x1b70]
[New Thread 2888.0x2578]
[New Thread 2888.0x133c]
[New Thread 2888.0x18d8]
[New Thread 2888.0x1328]
[New Thread 2888.0x3110]
[New Thread 2888.0x2768]
[New Thread 2888.0x8d0]
[New Thread 2888.0x2b60]
[New Thread 2888.0x21b4]
[New Thread 2888.0x424]
[New Thread 2888.0x3068]
[New Thread 2888.0x2da0]
[New Thread 2888.0x2c08]
[New Thread 2888.0x24ac]
[New Thread 2888.0x1ee8]
[New Thread 2888.0x1fc]
[New Thread 2888.0x153c]
[New Thread 2888.0x2784]
[New Thread 2888.0x524]
[New Thread 2888.0x1614]
[New Thread 2888.0x2168]
[New Thread 2888.0xa4c]
[New Thread 2888.0x2344]
[New Thread 2888.0x2c40]
[New Thread 2888.0x11e0]
[New Thread 2888.0x1a30]
[New Thread 2888.0x2660]
[New Thread 2888.0x2e18]
[New Thread 2888.0x2a80]
[New Thread 2888.0x1ba4]
[New Thread 2888.0x15c8]
[New Thread 2888.0x270c]
[New Thread 2888.0x694]
[New Thread 2888.0x2764]
[New Thread 2888.0xe74]
[New Thread 2888.0x2914]
[New Thread 2888.0xf5c]
[New Thread 2888.0x1420]
[New Thread 2888.0x2f90]
[New Thread 2888.0x810]
[New Thread 2888.0x22cc]
Reading symbols from /cygdrive/c/Program Files (x86)/emacs-trunk/bin/emacs.exe...done.
0x7727f925 in ntdll!DbgBreakPoint () from /cygdrive/c/Windows/SYSTEM32/ntdll.dll
(gdb) thread 1
[Switching to thread 1 (Thread 2888.0x233c)]
#0  0x0111cd8e in looking_at_1 (string=<optimized out>, posix=<optimized out>) at c:/msys/home/Dani/em
333     c:/msys/home/Dani/emacs/trunk/src/search.c: No such file or directory.
(gdb) finish
Run till exit from #0  0x0111cd8e in looking_at_1 (string=<optimized out>, posix=<optimized out>) at c:/msys/home/Dani/emacs/trunk/src/search.c:333
0x0114e182 in Ffuncall (nargs=2, args=0x88ccb4) at c:/msys/home/Dani/emacs/trunk/src/eval.c:2723
2723    c:/msys/home/Dani/emacs/trunk/src/eval.c: No such file or directory.
Value returned is $1 = 21994682
(gdb) finish
Run till exit from #0  0x0114e182 in Ffuncall (nargs=2, args=0x88ccb4) at c:/msys/home/Dani/emacs/trunk/src/eval.c:2723
error return /usr/src/ports/gdb/gdb-7.8-2.i686/src/gdb-7.8/gdb/windows-nat.c:1239 was 5
[Thread 2888.0x22cc exited with code 0]
0x0118ab67 in exec_byte_code (bytestr=21994682, vector=780, maxdepth=2, args_template=21994650, nargs=21994650, args=0x0) at c:/msys/home/Dani/emacs/trunk/src/bytecode.c:920
920     c:/msys/home/Dani/emacs/trunk/src/bytecode.c: No such file or directory.
Value returned is $2 = 21994682
(gdb) finish
Run till exit from #0  0x0118ab67 in exec_byte_code (bytestr=21994682, vector=780, maxdepth=2, args_template=21994650, nargs=21994650, args=0x0) at c:/msys/home/Dani/emacs/trunk/src/bytecode.c:920
funcall_lambda (fun=19768957, nargs=nargs@entry=1, arg_vector=arg_vector@entry=0x88ce44) at c:/msys/home/Dani/emacs/trunk/src/eval.c:2962
2962    c:/msys/home/Dani/emacs/trunk/src/eval.c: No such file or directory.
Value returned is $3 = 0
(gdb) finish
Run till exit from #0  funcall_lambda (fun=19768957, nargs=nargs@entry=1, arg_vector=arg_vector@entry=0x88ce44) at c:/msys/home/Dani/emacs/trunk/src/eval.c:2962
0x0114deeb in Ffuncall (nargs=2, args=0x88ce40) at c:/msys/home/Dani/emacs/trunk/src/eval.c:2784
2784    in c:/msys/home/Dani/emacs/trunk/src/eval.c
Value returned is $4 = 0
(gdb) finish
Run till exit from #0  0x0114deeb in Ffuncall (nargs=2, args=0x88ce40) at c:/msys/home/Dani/emacs/trunk/src/eval.c:2784
0x0114d56d in eval_sub (form=form@entry=123976582) at c:/msys/home/Dani/emacs/trunk/src/eval.c:2151
2151    in c:/msys/home/Dani/emacs/trunk/src/eval.c
Value returned is $5 = 0
(gdb) finish
Run till exit from #0  0x0114d56d in eval_sub (form=form@entry=123976582) at c:/msys/home/Dani/emacs/trunk/src/eval.c:2151
apply_lambda (fun=19064021, args=<optimized out>, count=count@entry=66) at c:/msys/home/Dani/emacs/trunk/src/eval.c:2824
2824    in c:/msys/home/Dani/emacs/trunk/src/eval.c
Value returned is $6 = 0
(gdb) finish
Run till exit from #0  apply_lambda (fun=19064021, args=<optimized out>, count=count@entry=66) at c:/msys/home/Dani/emacs/trunk/src/eval.c:2824
eval_sub (form=123976598) at c:/msys/home/Dani/emacs/trunk/src/eval.c:2249
2249    in c:/msys/home/Dani/emacs/trunk/src/eval.c
Value returned is $7 = 0
(gdb) finish
Run till exit from #0  eval_sub (form=123976598) at c:/msys/home/Dani/emacs/trunk/src/eval.c:2249
0x0114d723 in Fsetq (args=<optimized out>) at c:/msys/home/Dani/emacs/trunk/src/eval.c:532
532     in c:/msys/home/Dani/emacs/trunk/src/eval.c
Value returned is $8 = 0
(gdb) finish
Run till exit from #0  0x0114d723 in Fsetq (args=<optimized out>) at c:/msys/home/Dani/emacs/trunk/src/eval.c:532
510     in c:/msys/home/Dani/emacs/trunk/src/eval.c
(gdb) finish
Run till exit from #0  Fsetq (args=123976614) at c:/msys/home/Dani/emacs/trunk/src/eval.c:510
0x0114d1d2 in eval_sub (form=123976622) at c:/msys/home/Dani/emacs/trunk/src/eval.c:2128
2128    in c:/msys/home/Dani/emacs/trunk/src/eval.c
Value returned is $9 = 0
(gdb) finish
Run till exit from #0  0x0114d1d2 in eval_sub (form=123976622) at c:/msys/home/Dani/emacs/trunk/src/eval.c:2128
0x0114d1d2 in eval_sub (form=123974750) at c:/msys/home/Dani/emacs/trunk/src/eval.c:2128
2128    in c:/msys/home/Dani/emacs/trunk/src/eval.c
Value returned is $10 = 0
(gdb) finish
Run till exit from #0  0x0114d1d2 in eval_sub (form=123974750) at c:/msys/home/Dani/emacs/trunk/src/eval.c:2128
Fprogn (body=123974766) at c:/msys/home/Dani/emacs/trunk/src/eval.c:456
456     in c:/msys/home/Dani/emacs/trunk/src/eval.c
Value returned is $11 = 0
(gdb) finish
Run till exit from #0  Fprogn (body=123974766) at c:/msys/home/Dani/emacs/trunk/src/eval.c:456
0x01150d8c in Flet (args=123974774) at c:/msys/home/Dani/emacs/trunk/src/eval.c:963
963     in c:/msys/home/Dani/emacs/trunk/src/eval.c
Value returned is $12 = 0
(gdb) finish
Run till exit from #0  0x01150d8c in Flet (args=123974774) at c:/msys/home/Dani/emacs/trunk/src/eval.c:963
0x0114d1d2 in eval_sub (form=123974782) at c:/msys/home/Dani/emacs/trunk/src/eval.c:2128
2128    in c:/msys/home/Dani/emacs/trunk/src/eval.c
Value returned is $13 = 0
(gdb) finish
Run till exit from #0  0x0114d1d2 in eval_sub (form=123974782) at c:/msys/home/Dani/emacs/trunk/src/eval.c:2128
Fprogn (body=123974790) at c:/msys/home/Dani/emacs/trunk/src/eval.c:456
456     in c:/msys/home/Dani/emacs/trunk/src/eval.c
Value returned is $14 = 0
(gdb) finish
Run till exit from #0  Fprogn (body=123974790) at c:/msys/home/Dani/emacs/trunk/src/eval.c:456
0x0114dc0e in funcall_lambda (fun=123974806, nargs=nargs@entry=2, arg_vector=arg_vector@entry=0x88d420) at c:/msys/home/Dani/emacs/trunk/src/eval.c:2949
2949    in c:/msys/home/Dani/emacs/trunk/src/eval.c
Value returned is $15 = 0
(gdb) finish
Run till exit from #0  0x0114dc0e in funcall_lambda (fun=123974806, nargs=nargs@entry=2, arg_vector=arg_vector@entry=0x88d420) at c:/msys/home/Dani/emacs/trunk/src/eval.c:2949
0x0114deeb in Ffuncall (nargs=nargs@entry=3, args=args@entry=0x88d41c) at c:/msys/home/Dani/emacs/trunk/src/eval.c:2784
2784    in c:/msys/home/Dani/emacs/trunk/src/eval.c
Value returned is $16 = 0
(gdb) finish
Run till exit from #0  0x0114deeb in Ffuncall (nargs=nargs@entry=3, args=args@entry=0x88d41c) at c:/msys/home/Dani/emacs/trunk/src/eval.c:2784
0x0114f0c6 in Fapply (nargs=3, args=0x88d41c) at c:/msys/home/Dani/emacs/trunk/src/eval.c:2292
2292    in c:/msys/home/Dani/emacs/trunk/src/eval.c
Value returned is $17 = 0
(gdb) finish
Run till exit from #0  0x0114f0c6 in Fapply (nargs=3, args=0x88d41c) at c:/msys/home/Dani/emacs/trunk/src/eval.c:2292
0x0114e1e3 in Ffuncall (nargs=4, args=0x88d418) at c:/msys/home/Dani/emacs/trunk/src/eval.c:2703
2703    in c:/msys/home/Dani/emacs/trunk/src/eval.c
Value returned is $18 = 0
(gdb) finish
Run till exit from #0  0x0114e1e3 in Ffuncall (nargs=4, args=0x88d418) at c:/msys/home/Dani/emacs/trunk/src/eval.c:2703
0x0118ab67 in exec_byte_code (bytestr=0, vector=580, maxdepth=4, args_template=512, nargs=1, args=0x88d598) at c:/msys/home/Dani/emacs/trunk/src/bytecode.c:920
920     c:/msys/home/Dani/emacs/trunk/src/bytecode.c: No such file or directory.
Value returned is $19 = 0
(gdb) finish
Run till exit from #0  0x0118ab67 in exec_byte_code (bytestr=0, vector=580, maxdepth=4, args_template=512, nargs=1, args=0x88d598) at c:/msys/home/Dani/emacs/trunk/src/bytecode.c:920
funcall_lambda (fun=124221373, nargs=nargs@entry=1, arg_vector=arg_vector@entry=0x88d598) at c:/msys/home/Dani/emacs/trunk/src/eval.c:2963
2963    c:/msys/home/Dani/emacs/trunk/src/eval.c: No such file or directory.
Value returned is $20 = 0
(gdb) finish
Run till exit from #0  funcall_lambda (fun=124221373, nargs=nargs@entry=1, arg_vector=arg_vector@entry=0x88d598) at c:/msys/home/Dani/emacs/trunk/src/eval.c:2963
0x0114deeb in Ffuncall (nargs=2, args=0x88d594) at c:/msys/home/Dani/emacs/trunk/src/eval.c:2784
2784    in c:/msys/home/Dani/emacs/trunk/src/eval.c
Value returned is $21 = 0
(gdb) finish
Run till exit from #0  0x0114deeb in Ffuncall (nargs=2, args=0x88d594) at c:/msys/home/Dani/emacs/trunk/src/eval.c:2784
0x0118ab67 in exec_byte_code (bytestr=0, vector=570, maxdepth=2, args_template=21994650, nargs=0, args=0x0) at c:/msys/home/Dani/emacs/trunk/src/bytecode.c:920
920     c:/msys/home/Dani/emacs/trunk/src/bytecode.c: No such file or directory.
Value returned is $22 = 0
(gdb) finish
Run till exit from #0  0x0118ab67 in exec_byte_code (bytestr=0, vector=570, maxdepth=2, args_template=21994650, nargs=0, args=0x0) at c:/msys/home/Dani/emacs/trunk/src/bytecode.c:920
funcall_lambda (fun=19769173, nargs=nargs@entry=1, arg_vector=arg_vector@entry=0x88d714) at c:/msys/home/Dani/emacs/trunk/src/eval.c:2962
2962    c:/msys/home/Dani/emacs/trunk/src/eval.c: No such file or directory.
Value returned is $23 = 0
(gdb) finish
Run till exit from #0  funcall_lambda (fun=19769173, nargs=nargs@entry=1, arg_vector=arg_vector@entry=0x88d714) at c:/msys/home/Dani/emacs/trunk/src/eval.c:2962
0x0114deeb in Ffuncall (nargs=2, args=0x88d710) at c:/msys/home/Dani/emacs/trunk/src/eval.c:2784
2784    in c:/msys/home/Dani/emacs/trunk/src/eval.c
Value returned is $24 = 0
(gdb) finish
Run till exit from #0  0x0114deeb in Ffuncall (nargs=2, args=0x88d710) at c:/msys/home/Dani/emacs/trunk/src/eval.c:2784
0x0114d56d in eval_sub (form=form@entry=124088886) at c:/msys/home/Dani/emacs/trunk/src/eval.c:2151
2151    in c:/msys/home/Dani/emacs/trunk/src/eval.c
Value returned is $25 = 0
(gdb) finish
Run till exit from #0  0x0114d56d in eval_sub (form=form@entry=124088886) at c:/msys/home/Dani/emacs/trunk/src/eval.c:2151
apply_lambda (fun=19064021, args=<optimized out>, count=count@entry=53) at c:/msys/home/Dani/emacs/trunk/src/eval.c:2824
2824    in c:/msys/home/Dani/emacs/trunk/src/eval.c
Value returned is $26 = 0
(gdb) finish
Run till exit from #0  apply_lambda (fun=19064021, args=<optimized out>, count=count@entry=53) at c:/msys/home/Dani/emacs/trunk/src/eval.c:2824
eval_sub (form=124088902) at c:/msys/home/Dani/emacs/trunk/src/eval.c:2249
2249    in c:/msys/home/Dani/emacs/trunk/src/eval.c
Value returned is $27 = 0
(gdb) finish
Run till exit from #0  eval_sub (form=124088902) at c:/msys/home/Dani/emacs/trunk/src/eval.c:2249
0x0114d723 in Fsetq (args=<optimized out>) at c:/msys/home/Dani/emacs/trunk/src/eval.c:532
532     in c:/msys/home/Dani/emacs/trunk/src/eval.c
Value returned is $28 = 0
(gdb) finish
Run till exit from #0  0x0114d723 in Fsetq (args=<optimized out>) at c:/msys/home/Dani/emacs/trunk/src/eval.c:532
510     in c:/msys/home/Dani/emacs/trunk/src/eval.c
(gdb) finish
Run till exit from #0  Fsetq (args=124088918) at c:/msys/home/Dani/emacs/trunk/src/eval.c:510
0x0114d1d2 in eval_sub (form=124088926) at c:/msys/home/Dani/emacs/trunk/src/eval.c:2128
2128    in c:/msys/home/Dani/emacs/trunk/src/eval.c
Value returned is $29 = 0
(gdb) finish
Run till exit from #0  0x0114d1d2 in eval_sub (form=124088926) at c:/msys/home/Dani/emacs/trunk/src/eval.c:2128
0x0114d1d2 in eval_sub (form=124089070) at c:/msys/home/Dani/emacs/trunk/src/eval.c:2128
2128    in c:/msys/home/Dani/emacs/trunk/src/eval.c
Value returned is $30 = 0
(gdb)
Run till exit from #0  0x0114d1d2 in eval_sub (form=124089070) at c:/msys/home/Dani/emacs/trunk/src/eval.c:2128
Fprogn (body=124089086) at c:/msys/home/Dani/emacs/trunk/src/eval.c:456
456     in c:/msys/home/Dani/emacs/trunk/src/eval.c
Value returned is $31 = 0
(gdb)
--8<---------------cut here---------------end--------------->8---

I've typed "finish" 30 times; not sure when to stop. I still will keep
that Emacs open for now, so that you can ask me to work on it.

BTW, I really can reproduce the bug quite reliably: I open the LOGBOOK
drawer, start from the next subtree, and press left-arrow until I arrive
at the current timestamp. Emacs goes crazy when crossing the closing
bracket (see http://screencast.com/t/IReK7hx8 on where cursor stays
blocked).

Note that:

- I only press left-arrow, no other key, to move up to the point which
  I want to edit,
- It happens even with small drawers (of 2 lines),
- It sometimes unblock by itself (after less than 2 minutes).