[debbugs-tracker] bug#15990: closed (Bug-report: `sleep-for' doesn't sleep for expected period, maybe after async process invocation.)

[GNU bug Tracking System]

Your message dated Tue, 30 Jun 2015 19:11:47 +0300
with message-id <address@hidden>
and subject line Re: bug#20935: sleep-for wakes prematurely due to process 
output
has caused the debbugs.gnu.org bug report #20935,
regarding Bug-report: `sleep-for' doesn't sleep for expected period, maybe 
after async process invocation.
to be marked as done.

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20935: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=20935
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> --- Begin Message ---
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> Subject: 
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> Bug-report: `sleep-for' doesn't sleep for expected period, maybe after async process invocation.
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> Date: 
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> Thu, 28 Nov 2013 15:52:35 +0900 (JST)
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> Hi, Emacs developers.
>
> * Bug description
> `sleep-for' ends too early, by not sleeping for the expected time. It's 
> speculated that it's caused by a termination of an asynchronous process. [1]
>
> This bug does not always reproduce, but it often does.
>
> [1] 
> http://stackoverflow.com/questions/14698081/elisp-sleep-for-doesnt-block-when-running-a-test-in-ert
>
> * Environment
> Gentoo Linux, Emacs-24.3 and 24.1.
> Debian Linux, Emacs-23.2
>
> MacOS X, too, according to a page. [1]
>
> * Code to reproduce the bug
> Do "emacs -q" and run the code below. It uses an external Unix command "sleep".
> It has a line `(sleep-for 3)', but it *often* ends immediately. The last line 
> judges the result so that you don't need a timer watch to confirm.
>
> As far as I tested, the bug shows 100%, but if the bug doesn't reproduce, well, 
> please try several times, or another environment.  ;-) (With the original code 
> where I first met this problem, the bug occurrence rate exceeds 50%.)
>
> ------------------------------------------------------------------------
> (let ((buf "*sleep-for test*")
>       (now (cadr (current-time))))
>   (start-process "test" buf "sleep" "0.1")
>   (sleep-for 3)
>   (message "This should be t: %s" (< now (- (cadr (current-time)) 3))))
> ------------------------------------------------------------------------
>
> * Others
> The following bug report may be related. Not sure.
> http://debbugs.gnu.org/cgi/bugreport.cgi?bug=6202
>
> I think I can compile the bzr latest snapshot. (But it takes me 20 min. to 
> compile 24.3. :P)
>
> Thank you very much. Best regards,
>
> Teika (Teika kazura)
>
>
>
> --- End Message ---
> --- Begin Message ---
>
>
>
> Subject: 
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> Re: bug#20935: sleep-for wakes prematurely due to process output
>
>
>
>
> Date: 
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> Tue, 30 Jun 2015 19:11:47 +0300
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>
>
>
> > From: Glenn Morris <address@hidden>
> > Date: Mon, 29 Jun 2015 23:41:18 -0400
> > Cc: address@hidden
> > 
> > Francis Litterio wrote:
> > 
> > > On Windows, using the latest sources, function sleep-for is woken
> > > prematurely by process (or network connection) output.  I'm not sure if
> > > this also happens on UNIX,
> > 
> > Yes, it's the unaddressed http://debbugs.gnu.org/15990 .
>
> Sorry, I completely forgot about that problem (it was still in my
> queue).
>
> Now fixed in commit 3bea77f.
>
>
> --- End Message ---