From: Li Zhai <mrzhaili@gmail.com>
To: Eli Zaretskii <eliz@gnu.org>
Cc: 13079@debbugs.gnu.org
Subject: bug#13079: 24.3.50; Emacs cannot create subprocess
Date: Wed, 5 Dec 2012 10:26:51 +0800 [thread overview]
Message-ID: <CAPPz3g4RxarEw+P6DHh0ii3LrHOB4Ae8yWvo+sq-bTVZq1yW8Q@mail.gmail.com> (raw)
In-Reply-To: <83ehj5r2gs.fsf@gnu.org>
Sorry. I'll explain more clear. I'm using emacs under windows 7.
I mean, emacs display the messages before the loop ends. And all the
processes are gone, emacs did not wait them to exit.
I've tried two different version from
http://ftp.gnu.org/gnu/emacs/windows/emacs-23.4-bin-i386.zip and
http://alpha.gnu.org/gnu/emacs/windows/emacs-20120917-r110062-bin-i386.zip
Here is how to reproduce the bug:
1. Open the emacs using ``emacs -Q''
2. paste the code into *scratch* buffer:
(progn
(dotimes (i 35)
(call-process-region (point-min) (point-min) "ddeclient" t 0 nil
"SUMATRA" "control")
(message "%d" i)))
the *ONLY* difference between the previous code is I increase the
repeat times to call the function `call-process-region'. Here is 35
times, you could try to increase the number lager if the bug not
reproducing.
3. Eval the code using C-x C-e
4. You should see the emacs report an error:
Debugger entered--Lisp error: (file-error "Spawning child process"
"resource temporarily unavailable")
5. Quit the elisp debugger and execute the code again(press C-x C-e),
this time emacs should report:
Debugger entered--Lisp error: (file-error "Opening output file"
"permission denied" "c:/Users/iot003/Desktop/emacs-24.2.50/bin")
call-process-region(1 1 "ddeclient" t 0 nil "SUMATRA" "control")
6. Quit the elisp debugger. This time, emacs cannot create any
sub-process any more. Try to execute a shell command by press `M-!
ls', you will find it out.
This problem occurred more often on my private build version. I guess
the problem is the default stack size assigned by compiler is too
small.
Thanks for your reply, Eli. Have a good day.
On Wed, Dec 5, 2012 at 4:23 AM, Eli Zaretskii <eliz@gnu.org> wrote:
>> Date: Tue, 4 Dec 2012 16:03:56 +0800
>> From: Li Zhai <mrzhaili@gmail.com>
>>
>> I've noticed emacs cannot create subprocess in some cases:
>>
>> (progn
>> (dotimes (i 25)
>> (call-process-region (point-min) (point-min) "ddeclient" t 0 nil
>> "SUMATRA" "control")
>> (message "%d" i)))
>>
>> After executed above codes, emacs report:
>>
>> "Spawning child process" "resource temporarily unavailable"
>
> I cannot reproduce this here. Does this happen in "emacs -Q"?
> Also, what do you mean "after executing"? Does it mean Emacs displays
> this message before it ends the loop, i.e. before it launches 25
> processes? Or do you mean that after all the 25 processes are
> launched, Emacs cannot start more subprocesses? If the latter, does
> the problem go away after you wait for all the 25 ddeclient
> subprocesses to exit?
next prev parent reply other threads:[~2012-12-05 2:26 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-12-04 8:03 bug#13079: 24.3.50; Emacs cannot create subprocess Li Zhai
2012-12-04 20:23 ` Eli Zaretskii
2012-12-05 2:26 ` Li Zhai [this message]
2012-12-05 17:29 ` Eli Zaretskii
2012-12-06 1:58 ` Li Zhai
2012-12-06 3:54 ` Eli Zaretskii
2012-12-06 8:18 ` Li Zhai
2012-12-06 19:04 ` Eli Zaretskii
2012-12-15 13:41 ` Eli Zaretskii
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