bug#5637: 23.1.92; Cygwin Emacs hangs after completion of //

bug#5637: 23.1.92; Cygwin Emacs hangs after completion of //

[Tetsurou Okazaki]

This bug report will be sent to the Free Software Foundation,
not to your local site managers!
Please write in English if possible, because the Emacs maintainers
usually do not have translators to read other languages for them.

Your bug report will be posted to the bug-gnu-emacs@gnu.org mailing list,
and to the gnu.emacs.bug news group.

Please describe exactly what actions triggered the bug
and the precise symptoms of the bug.  If you can, give
a recipe starting from `emacs -Q':

  Emacs in trunk built with Cygwin environment hangs
  when you try to complete path name after double slashes.

  M-x find-file
  (In the minibuffer) //[TAB]

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'.
For information about debugging Emacs, please read the file
/usr/local/share/emacs/23.1.92/etc/DEBUG.


In GNU Emacs 23.1.92.1 (i686-pc-cygwin, GTK+ Version 2.18.6)
 of 2010-02-22 on zeroset
configured using `configure  '--with-x-toolkit=gtk''

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: C
  value of $XMODIFIERS: nil
  locale-coding-system: nil
  default enable-multibyte-characters: t

Major mode: Lisp Interaction

Minor modes in effect:
  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-encryption-mode: t
  auto-compression-mode: t
  line-number-mode: t
  transient-mark-mode: t

Recent input:
ESC [ > 0 ; 1 3 6 ; 0 c ESC x r e p o r t - e m a TAB 
RET

Recent messages:
("emacs")
For information about GNU Emacs and the GNU system, type C-h C-a.

Load-path shadows:
/usr/local/share/emacs/site-lisp/flim/sha1 hides /usr/local/share/emacs/23.1.92/lisp/sha1
/usr/local/share/emacs/site-lisp/flim/md4 hides /usr/local/share/emacs/23.1.92/lisp/md4
/usr/local/share/emacs/site-lisp/flim/hex-util hides /usr/local/share/emacs/23.1.92/lisp/hex-util
/usr/local/share/emacs/site-lisp/bitmap/po hides /usr/local/share/emacs/23.1.92/lisp/textmodes/po
/usr/local/share/emacs/site-lisp/flim/sasl hides /usr/local/share/emacs/23.1.92/lisp/net/sasl
/usr/local/share/emacs/site-lisp/flim/sasl-ntlm hides /usr/local/share/emacs/23.1.92/lisp/net/sasl-ntlm
/usr/local/share/emacs/site-lisp/flim/sasl-digest hides /usr/local/share/emacs/23.1.92/lisp/net/sasl-digest
/usr/local/share/emacs/site-lisp/flim/sasl-cram hides /usr/local/share/emacs/23.1.92/lisp/net/sasl-cram
/usr/local/share/emacs/site-lisp/flim/ntlm hides /usr/local/share/emacs/23.1.92/lisp/net/ntlm
/usr/local/share/emacs/site-lisp/flim/hmac-md5 hides /usr/local/share/emacs/23.1.92/lisp/net/hmac-md5
/usr/local/share/emacs/site-lisp/flim/hmac-def hides /usr/local/share/emacs/23.1.92/lisp/net/hmac-def
/usr/local/share/emacs/site-lisp/wl/rfc2368 hides /usr/local/share/emacs/23.1.92/lisp/mail/rfc2368
/usr/local/share/emacs/site-lisp/wl/utf7 hides /usr/local/share/emacs/23.1.92/lisp/gnus/utf7

Features:
(shadow sort mail-extr message sendmail regexp-opt ecomplete rfc822 mml
mml-sec password-cache mm-decode mm-bodies mm-encode mailcap mail-parse
rfc2231 rfc2047 rfc2045 qp ietf-drums mailabbrev nnheader gnus-util
netrc time-date mm-util mail-prsvr gmm-utils wid-edit mailheader canlock
sha1 sha1-el hex-util hashcash mail-utils help-mode easymenu view
emacsbug tooltip ediff-hook vc-hooks lisp-float-type mwheel x-win x-dnd
font-setting tool-bar dnd fontset image fringe lisp-mode register page
menu-bar rfn-eshadow timer select scroll-bar mldrag 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 loaddefs button
minibuffer faces cus-face files text-properties overlay md5 base64
format env code-pages mule custom widget hashtable-print-readable
backquote make-network-process dbusbind system-font-setting
font-render-setting gtk x-toolkit x multi-tty emacs)

bug#5637: 23.1.92; Cygwin Emacs hangs after completion of //

[Eli Zaretskii]

> Date: Wed, 24 Feb 2010 18:05:11 +0900
> From: Tetsurou Okazaki <okazaki@be.to>
> Cc: 
> 
>   Emacs in trunk built with Cygwin environment hangs
>   when you try to complete path name after double slashes.
> 
>   M-x find-file
>   (In the minibuffer) //[TAB]

Could it be that it just waits for the network?  If you leave it alone
for a few minutes, does it come back to life?

The // is the beginning of the UNC, so Emacs could be trying to access
the network.  If that's true, it will time-out after a few minutes.

bug#5637: 23.1.92; Cygwin Emacs hangs after completion of //

[Tetsurou Okazaki]

At Wed, 24 Feb 2010 20:30:13 +0200,
Eli Zaretskii wrote:
> 
> > Date: Wed, 24 Feb 2010 18:05:11 +0900
> > From: Tetsurou Okazaki <okazaki@be.to>
> > Cc: 
> > 
> >   Emacs in trunk built with Cygwin environment hangs
> >   when you try to complete path name after double slashes.
> > 
> >   M-x find-file
> >   (In the minibuffer) //[TAB]
> 
> Could it be that it just waits for the network?  If you leave it alone
> for a few minutes, does it come back to life?

No.  Sending QUIT signal from outside the process returns control to Emacs.
Tracing with gdb revealed that Emacs blocks in the function `file_name_completion_stat'
at `stat' call with the argument fullname = "//bin" after the previous `lstat' call
with same arguments returns -1 with errno = EINTR.


> The // is the beginning of the UNC, so Emacs could be trying to access
> the network.  If that's true, it will time-out after a few minutes.



--
Tetsurou

bug#5637: 23.1.92; Cygwin Emacs hangs after completion of //

[Eli Zaretskii]

> Date: Tue, 09 Mar 2010 06:06:35 +0900
> From: Tetsurou Okazaki <okazaki@be.to>
> Cc: Tetsurou Okazaki <okazaki@be.to>, 5637@debbugs.gnu.org
> 
> No.  Sending QUIT signal from outside the process returns control to Emacs.
> Tracing with gdb revealed that Emacs blocks in the function `file_name_completion_stat'
> at `stat' call with the argument fullname = "//bin" after the previous `lstat' call
> with same arguments returns -1 with errno = EINTR.

The errno = EINTR looks strange -- unless you also interrupted it
under GDB.

Could this be a Cygwin issue?  Would it be a good idea to ask on the
Cygwin list about calling `stat' with an argument that begins with two
slashes?

bug#5637: 23.1.92; Cygwin Emacs hangs after completion of //

[Stefan Monnier]

>   Emacs in trunk built with Cygwin environment hangs
>   when you try to complete path name after double slashes.

>   M-x find-file
>   (In the minibuffer) //[TAB]

Does it "hang hard" or can you interrupt the hang with C-g?
Most likely it's just waiting for some network access, in which case the
only/best thing we can do is to make sure C-g lets you interrupt the wait.


        Stefan

bug#5637: 23.1.92; Cygwin Emacs hangs after completion of //

[Lars Magne Ingebrigtsen]

Tetsurou Okazaki <okazaki@be.to> writes:

>   Emacs in trunk built with Cygwin environment hangs
>   when you try to complete path name after double slashes.
>
>   M-x find-file
>   (In the minibuffer) //[TAB]

Is this still a problem with a current Emacs?

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

bug#5637: 23.1.92; Cygwin Emacs hangs after completion of //

[Lars Magne Ingebrigtsen]

Lars Magne Ingebrigtsen <larsi@gnus.org> writes:

> Tetsurou Okazaki <okazaki@be.to> writes:
>
>>   Emacs in trunk built with Cygwin environment hangs
>>   when you try to complete path name after double slashes.
>>
>>   M-x find-file
>>   (In the minibuffer) //[TAB]
>
> Is this still a problem with a current Emacs?

More information was requested, but no response was given within a few
months, so I'm closing this bug report.  If the problem still exists,
please reopen this bug report.

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