GNU bug report logs - #18828
24.4; Early collision warning when 'create-lockfiles' is set to nil

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From: help-debbugs <at> gnu.org (GNU bug Tracking System)
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: tracker <at> debbugs.gnu.org
Subject: bug#18828: closed (24.4; Early collision warning when
 'create-lockfiles' is set to nil)
Date: Fri, 08 May 2015 09:23:02 +0000

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Your message dated Fri, 08 May 2015 12:22:04 +0300
with message-id <83pp6bpgoz.fsf <at> gnu.org>
and subject line Re: bug#18828: 24.4; Early collision warning when 'create-lockfiles' is set to nil
has caused the debbugs.gnu.org bug report #18828,
regarding 24.4; Early collision warning when 'create-lockfiles' is set to nil
to be marked as done.

(If you believe you have received this mail in error, please contact
help-debbugs <at> gnu.org.)


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18828: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=18828
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From: Dani Moncayo <dmoncayo <at> gmail.com>
To: bug-gnu-emacs <bug-gnu-emacs <at> gnu.org>
Subject: 24.4; Early collision warning when 'create-lockfiles' is set to nil
Date: Sat, 25 Oct 2014 17:07:25 +0200

Recipe:
0. emacs -Q
1. Eval: (setq create-lockfiles nil)
2. Visit some file
3. With another program, update the visited file.
4. Try to make some change to the buffer.

------------

Without step 1, Emacs does TRT, i.e., it detects that I'm trying to
make the first change to a buffer whose file has already changed since
it was visited, so it warns me with:

 foo changed on disk; really edit the buffer? (y, n, r or C-h)

But with step 1, Emacs doesn't warn me until I try to save the buffer;
then it shows me this:

  foo has changed since visited or saved.  Save anyway? (yes or no)

(BTW: the above message does not get archived in the *Messages*
buffer.  Why not?  I think it should, as with the first warning)

Well, I think that Emacs should warn me on step 4, regardles of
whether I did step 1 or not.

I set `create-lockfiles' to nil in my init file because I don't want
Emacs to create temporary files of any kind, but obviously I want to
be warned whenever I am about to change a buffer whose file has
changed on disk after it was last read by Emacs.

I observe this bug both with the last 24.4 release and with the trunk.

In GNU Emacs 24.4.1 (i686-pc-mingw32)
 of 2014-10-20 on LEG570
Windowing system distributor `Microsoft Corp.', version 6.3.9600
Important settings:
  value of $LANG: ENU
  locale-coding-system: cp1252

-- 
Dani Moncayo

[Message part 3 (message/rfc822, inline)]

From: Eli Zaretskii <eliz <at> gnu.org>
To: Dani Moncayo <dmoncayo <at> gmail.com>
Cc: 18828-done <at> debbugs.gnu.org
Subject: Re: bug#18828: 24.4;
 Early collision warning when 'create-lockfiles' is set to nil
Date: Fri, 08 May 2015 12:22:04 +0300

> Date: Mon, 4 May 2015 23:12:54 +0200
> From: Dani Moncayo <dmoncayo <at> gmail.com>
> Cc: 18828 <at> debbugs.gnu.org
> 
> > Here you go (if no one objects, I will push this in a few days):
> 
> Hi Eli,
> 
> I've tested your patch and seems to fix the problem.
> 
> Thank you so much.

Thanks, I pushed it.

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