From: "Elias Mårtenson" <lokedhs@gmail.com>
To: Eli Zaretskii <eliz@gnu.org>
Cc: raeburn@raeburn.org, Tino Calancha <tino.calancha@gmail.com>,
25247@debbugs.gnu.org
Subject: bug#25247: 26.0.50; Concurrency crashes with XLib
Date: Fri, 30 Dec 2016 19:21:08 +0800 [thread overview]
Message-ID: <CADtN0WJgMaF8FWGVu60Moc0yjBXwbTySbCrZ+FcTM9b=Bg-5zQ@mail.gmail.com> (raw)
In-Reply-To: <834m1lu16d.fsf@gnu.org>
[-- Attachment #1: Type: text/plain, Size: 1937 bytes --]
On 30 December 2016 at 19:05, Eli Zaretskii <eliz@gnu.org> wrote:
> I open IELM in one window, and an empty buffer "z" in another, and type
> the
> > following:
> >
> > (loop
> > repeat 10
> > do (make-thread (lambda ()
> > (let ((n (random 10)))
> > (with-current-buffer "z"
> > (sleep-for n)
> > (insert (format "Foo:%d\n" n)))))))
> >
> > Here, I'd expect to see the "z" buffer being updated at the corresponding
> > times. I.e. the message "Foo:4" should be displayed after 4 seconds. This
> > is not what I see. Instead the messages appear in batches (i.e. several
> > rows appearing at the same time).
>
> And what do the messages that appear together say in the %d part? Do
> they all show the same value?
>
No. They show wildly different values. For example, during one test, after
roughly 8 seconds, I got 7 or so messages with number ranging from 2 to 8.
One interesting fact is that if I replace ‘sleep-for’ with ‘sit-for’, then
the updates come at exactly the expected time. In other words, the
unpredictable behaviour where keypresses would randomly make the ‘sit-for’
expire doesn't happen anymore.
> The following seems to be a problem with lexically bound lambda functions
> > used in a thread. The following example illustrates the problem:
> >
> > (let ((x "test"))
> > (make-thread (lambda ()
> > (with-current-buffer "z"
> > (insert x)))))
> >
> > I would expect this to insert "test" into the buffer, but instead nothing
> > happens. Removing the reference to the variable "x" in the lambda makes
> it
> > work.
>
> Isn't the above expected? If not, why not?
>
Never mind. This one was caused by me. Please ignore it.
The problem was that ‘lexical-binding’ was set to nil in my IELM buffer.
Regards,
Elias
[-- Attachment #2: Type: text/html, Size: 2842 bytes --]
next prev parent reply other threads:[~2016-12-30 11:21 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-12-22 10:20 bug#25247: 26.0.50; Concurrency crashes Tino Calancha
2016-12-22 17:28 ` Eli Zaretskii
2016-12-23 3:34 ` Tino Calancha
2016-12-23 8:34 ` Eli Zaretskii
2016-12-23 11:32 ` Tino Calancha
2016-12-23 14:14 ` Eli Zaretskii
2016-12-29 11:37 ` bug#25247: 26.0.50; Concurrency crashes with XLib Tino Calancha
2016-12-29 17:44 ` Eli Zaretskii
2016-12-30 3:13 ` Tino Calancha
2016-12-30 7:19 ` Ken Raeburn
2016-12-30 8:37 ` Eli Zaretskii
2016-12-30 9:41 ` Eli Zaretskii
2016-12-30 10:30 ` Elias Mårtenson
2016-12-30 11:05 ` Eli Zaretskii
2016-12-30 11:21 ` Elias Mårtenson [this message]
2016-12-30 18:54 ` Eli Zaretskii
2016-12-30 20:40 ` Eli Zaretskii
2016-12-31 11:05 ` Eli Zaretskii
2016-12-31 15:34 ` Elias Mårtenson
2016-12-31 15:51 ` Eli Zaretskii
2016-12-31 16:24 ` Elias Mårtenson
2016-12-31 17:18 ` Eli Zaretskii
2016-12-31 17:28 ` Elias Mårtenson
2016-12-31 18:06 ` Eli Zaretskii
2016-12-31 18:16 ` Elias Mårtenson
2016-12-31 18:29 ` Eli Zaretskii
2016-12-31 18:38 ` Eli Zaretskii
2016-12-30 13:45 ` Tino Calancha
2016-12-30 16:57 ` Eli Zaretskii
2017-01-06 0:03 ` npostavs
2017-01-06 7:48 ` Eli Zaretskii
2016-12-23 9:34 ` bug#25247: 26.0.50; Concurrency crashes Ken Raeburn
2016-12-23 10:04 ` Eli Zaretskii
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to='CADtN0WJgMaF8FWGVu60Moc0yjBXwbTySbCrZ+FcTM9b=Bg-5zQ@mail.gmail.com' \
--to=lokedhs@gmail.com \
--cc=25247@debbugs.gnu.org \
--cc=eliz@gnu.org \
--cc=raeburn@raeburn.org \
--cc=tino.calancha@gmail.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
Code repositories for project(s) associated with this external index
https://git.savannah.gnu.org/cgit/emacs.git
https://git.savannah.gnu.org/cgit/emacs/org-mode.git
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.