GNU bug report logs - #6355
24.0.50; sit-for 0.0 returns nil without user input

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Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: "Drew Adams" <drew.adams <at> oracle.com>
To: <bug-gnu-emacs <at> gnu.org>
Subject: 24.0.50; sit-for 0.0 returns nil without user input
Date: Sat, 5 Jun 2010 08:17:39 -0700

I see this problem systematically starting with Emacs 22 but never with
Emacs 20 or 21.
 
If the sit-for value is 0.0, then it can return nil even without user
input.  If the value is ever so slightly more than 0.0, e.g. 0.001, then
there is no problem.
 
This is using source code, not byte-compiled code, so it's not a
byte-compiler optimization that is causing the problem.
 
I do not have an emacs -Q recipe.  If you just eval (sit-for 0.0) it
returns t.  Executing some of the surrounding code I use also does not
reproduce the problem.  But in my setup (too much to reproduce) it
always returns nil for 0.0.
 
Dunno if maybe it's picking up some non-user event as if it were input.
I do know that without user input the return value is nil (in my
context).

In GNU Emacs 24.0.50.1 (i386-mingw-nt5.1.2600)
 of 2010-05-23 on G41R2F1
Windowing system distributor `Microsoft Corp.', version 5.1.2600
configured using `configure --with-gcc (3.4) --no-opt --cflags -Ic:/xpm/include'
 

Message #8 received at 6355 <at> debbugs.gnu.org (full text, mbox):

From: Lars Ingebrigtsen <larsi <at> gnus.org>
To: "Drew Adams" <drew.adams <at> oracle.com>
Cc: 6355 <at> debbugs.gnu.org
Subject: Re: bug#6355: 24.0.50; sit-for 0.0 returns nil without user input
Date: Sat, 01 Feb 2014 01:07:44 -0800

"Drew Adams" <drew.adams <at> oracle.com> writes:

> I do not have an emacs -Q recipe.  If you just eval (sit-for 0.0) it
> returns t.  Executing some of the surrounding code I use also does not
> reproduce the problem.  But in my setup (too much to reproduce) it
> always returns nil for 0.0.
>
> Dunno if maybe it's picking up some non-user event as if it were input.
> I do know that without user input the return value is nil (in my
> context).

Is this still a problem?  I'm unable to reproduce it.

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

Message #13 received at 6355 <at> debbugs.gnu.org (full text, mbox):

From: Lars Ingebrigtsen <larsi <at> gnus.org>
To: "Drew Adams" <drew.adams <at> oracle.com>
Cc: 6355 <at> debbugs.gnu.org
Subject: Re: bug#6355: 24.0.50; sit-for 0.0 returns nil without user input
Date: Sat, 26 Dec 2015 00:05:04 +0100

Lars Ingebrigtsen <larsi <at> gnus.org> writes:

> "Drew Adams" <drew.adams <at> oracle.com> writes:
>
>> I do not have an emacs -Q recipe.  If you just eval (sit-for 0.0) it
>> returns t.  Executing some of the surrounding code I use also does not
>> reproduce the problem.  But in my setup (too much to reproduce) it
>> always returns nil for 0.0.
>>
>> Dunno if maybe it's picking up some non-user event as if it were input.
>> I do know that without user input the return value is nil (in my
>> context).
>
> Is this still a problem?  I'm unable to reproduce it.

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

Message #18 received at 6355 <at> debbugs.gnu.org (full text, mbox):

From: Drew Adams <drew.adams <at> oracle.com>
To: Lars Ingebrigtsen <larsi <at> gnus.org>
Cc: 6355 <at> debbugs.gnu.org
Subject: RE: bug#6355: 24.0.50; sit-for 0.0 returns nil without user input
Date: Fri, 25 Dec 2015 15:12:35 -0800 (PST)

> More information was requested, but no response was given within a few
> months, so I'm closing this bug report.

Yes, it was requested _4 years_ after it was reported, in 2010.  (And
the bug report already made clear that no more info was available.)

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