emacs hangs at occasions using tramp + opensshd(cygwin)

[William Xu]

I'm editing some text files on a remote Windows XP machine, using tramp
+ opensshd(on cygwin).  Occasionally, emacs would suddenly hang.  I
have experienced this several times, but still have no clue what might
cause that.  Today luckily I started it in gdb, so I got a backtrace
attached below: 

---------------------------------8<------------------------------------- 
(gdb) bt 10
#0  0x9083072e in select$DARWIN_EXTSN$NOCANCEL ()
#1  0x9087eba1 in select ()
#2  0x0014799b in *_sys_select$UNIX2003 (nfds=26, rfds=0xbfffae98, wfds=0x0,
efds=0x0, timeout=0xbfffaf18) at mac.c:5138
#3  0x0012f03f in wait_reading_process_output (time_limit=1, microsecs=0,
read_kbd=0, do_display=0, wait_for_cell=2
5165833, wait_proc=0x18ad5190, just_wait_proc=0) at process.c:4601
#4  0x001313e4 in Faccept_process_output (process=414011796, seconds=8,
millisec=25165833, just_this_one=25165833) at process.c:3971
#5  0x000f3ecc in Ffuncall (nargs=4, args=0xbfffb050) at eval.c:3003
#6  0x0012618b in Fbyte_code (bytestr=35867795, vector=379803252, maxdepth=4)
at bytecode.c:679
#7  0x000f3791 in funcall_lambda (fun=379803380, nargs=2,
arg_vector=0xbfffb1d4) at eval.c:3180
#8  0x000f3cab in Ffuncall (nargs=3, args=0xbfffb1d0) at eval.c:3050
#9  0x0012618b in Fbyte_code (bytestr=36100227, vector=379807748, maxdepth=8)
at bytecode.c:679

(gdb) bt 3 full
#0  0x9083072e in select$DARWIN_EXTSN$NOCANCEL ()
No symbol table info available.
#1  0x9087eba1 in select ()
No symbol table info available.
#2  0x0014799b in *_sys_select$UNIX2003 (nfds=26, rfds=0xbfffae98, wfds=0x0,
efds=0x0, timeout=0xbfffaf18) at mac.c:5138
err = 382152820
r = 4
select_timeout = {
    tv_sec = 1207038505,
    tv_usec = 2417
}
ofds = {{
    fds_bits = {58227840, 0 <repeats 31
        times>}
}, {
    fds_bits = {0 <repeats 32
        times>}
}, {
    fds_bits = {0 <repeats 32
        times>}
}}
#3  0x0012f03f in wait_reading_process_output (time_limit=1, microsecs=0,
        read_kbd=0, do_display=0, wait_for_cell=2
        5165833, wait_proc=0x18ad5190, just_wait_proc=0) at process.c:4601
timeout_reduced_for_timers = 1
channel = 26
nfds = 0
Available = {
    fds_bits = {58227840, 0 <repeats 31 times>}
}
Connecting = {
    fds_bits = {0 <repeats 32 times>}
}
check_connect = 0
check_delay = 0
no_avail =
<value temporarily unavailable, due to optimizations>
    xerrno = 11
    proc = <value temporarily unavailable, due to optimizations>
timeout =
{
    tv_sec = 0,
    tv_usec = 28957
}
end_time =
{
    tv_sec = 1207038505,
    tv_usec = 333876
}
wait_channel = 19
got_some_input = 0
---------------------------------8<------------------------------------- 

If Emacs crashed, and you have the Emacs process in the gdb debugger,
please include the output from the following gdb commands:
    `bt full' and `xbacktrace'.
If you would like to further debug the crash, please read the file
/Users/william/share/emacs/22.1.91/etc/DEBUG for instructions.


In GNU Emacs 22.2.50.1 (i386-apple-darwin9.2.0, Carbon Version 1.6.0)
 of 2008-03-27 on zen
Windowing system distributor `Apple Inc.', version 10.5.2
configured using `configure  '--prefix=/Users/william' '--with-carbon' 
'--without-x''

Important settings:
  value of $LC_ALL: nil
  value of $LC_COLLATE: nil
  value of $LC_CTYPE: nil
  value of $LC_MESSAGES: nil
  value of $LC_MONETARY: nil
  value of $LC_NUMERIC: nil
  value of $LC_TIME: nil
  value of $LANG: nil
  locale-coding-system: chinese-iso-8bit
  default-enable-multibyte-characters: t

Major mode: Text

Minor modes in effect:
  erc-menu-mode: t
  erc-ring-mode: t
  erc-pcomplete-mode: t
  erc-button-mode: t
  erc-netsplit-mode: t
  encoded-kbd-mode: t
  which-function-mode: t
  global-pabbrev-mode: t
  pabbrev-mode: t
  erc-truncate-mode: t
  erc-log-mode: t
  erc-spelling-mode: t
  erc-fill-mode: t
  erc-stamp-mode: t
  erc-autojoin-mode: t
  erc-track-mode: t
  erc-track-minor-mode: t
  erc-match-mode: t
  erc-smiley-mode: t
  erc-irccontrols-mode: t
  erc-noncommands-mode: t
  erc-readonly-mode: t
  shell-dirtrack-mode: t
  page-break-mode: t
  display-time-mode: t
  recentf-mode: t
  smart-operator-mode: t
  global-auto-revert-mode: t
  show-paren-mode: t
  less-minor-mode: t
  tooltip-mode: t
  mouse-wheel-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  blink-cursor-mode: t
  unify-8859-on-encoding-mode: t
  utf-translate-cjk-mode: t
  auto-compression-mode: t
  column-number-mode: t
  line-number-mode: t
  transient-mark-mode: t
  abbrev-mode: t

Recent input:
q C-c n E C-c C-@ C-c m s C-x C-f t m p <return> C-j 
M-> M-< C-s b u g C-s <return> <return> j j f f G g 
j j j j j j g j j j j j j j j j j j j j j j j j j j 
j j j j j j e DEL C-l C-c C-@ <f11> <f11> <f11> <f11> 
<f11> <f11> <f11> <f11> <f11> <f11> <f11> <f11> <f11> 
<f11> <f11> <f11> <f11> <f11> <f11> C-n C-n C-n C-b 
C-M-n C-M-n C-n C-k C-l C-n C-n C-n C-n C-n C-n C-n 
C-l C-n C-p C-p C-e C-b C-M-n C-M-n C-M-n C-M-n C-l 
C-p C-p C-p C-p C-p C-p C-n C-p C-p C-p C-p C-p C-p 
C-n C-n C-n C-n C-n C-n C-p C-e C-k M-¥ C-e C-k M-¥ 
C-n C-k M-¥ C-e C-k M-¥ C-n C-n C-n C-k C-a DEL SPC 
C-f SPC C-n C-k SPC C-e C-k SPC C-e <return> C-x C-s 
M-< C-c v j j g f f g f g f f f f b g f f f f g G g 
G g M-x e m m s - r e p C-g M-x r e p o r <tab> e m 
a <tab> b <tab> <return>

Recent messages:
Omitting...
Omitted 3 lines.
Less minor mode enabled
Mark set [3 times]
call-interactively: End of buffer [2 times]
Mark set
call-interactively: End of buffer [2 times]
Mark set [5 times]
Quit
Loading emacsbug...done

-- 
William

http://williamxu.net9.org