GNU bug report logs - #51110
Native-comp leaks fds open on /dev/ptmx

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From: help-debbugs <at> gnu.org (GNU bug Tracking System)
To: Stephen Gildea <stepheng+emacs <at> gildea.com>
Subject: bug#51110: closed (Re: bug#51110: Native-comp leaks fds open on
 /dev/ptmx)
Date: Wed, 01 Dec 2021 02:29:02 +0000

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Your bug report

#51110: Native-comp leaks fds open on /dev/ptmx

which was filed against the emacs package, has been closed.

The explanation is attached below, along with your original report.
If you require more details, please reply to 51110 <at> debbugs.gnu.org.

-- 
51110: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=51110
GNU Bug Tracking System
Contact help-debbugs <at> gnu.org with problems

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From: Stephen Gildea <stepheng+emacs <at> gildea.com>
To: Eli Zaretskii <eliz <at> gnu.org>, Andrea Corallo <akrl <at> sdf.org>
Cc: 51110-done <at> debbugs.gnu.org
Subject: Re: bug#51110: Native-comp leaks fds open on /dev/ptmx
Date: Tue, 30 Nov 2021 18:28:36 -0800

Eli Zaretskii <eliz <at> gnu.org> wrote:

>   > From: Andrea Corallo <akrl <at> sdf.org>
>   > Cc: stepheng+emacs <at> gildea.com, 51110 <at> debbugs.gnu.org
>   > Date: Tue, 30 Nov 2021 20:24:59 +0000
>   > 
>   > > I don't think there's anything we _can_ do here, and I tried to
>   > > explain why.
>   > 
>   > I agree, I don't think we really want support `invocation-name'
>   > modifications at runtime.
>   > 
>   > Shall we close this bug?
>   
>   I think so.  But before we do, I'd like to let Stephen a chance to
>   convince us otherwise.

I'm happy to see this bug closed, and I hereby do so.
Thank you for the discussion.

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From: Stephen Gildea <stepheng+emacs <at> gildea.com>
To: bug-emacs <at> gnu.org
Subject: Native-comp leaks fds open on /dev/ptmx
Date: Sat, 09 Oct 2021 08:45:25 -0700

Version: 28.0.60
Severity: important

Native-comp leaks fds open on /dev/ptmx if you change 'invocation-name'
and then run a function that loads libraries and causes some compilation.
Emacs seems to compile each file multiple times (16 or more), and it soon
runs out of file descriptors.

To reproduce:

Use a newly built (configure --with-native-compilation) Emacs that has
never (successfully) run MH-E before; if your eln-cache has already been
populated, you will need to delete the cache to repeat the failure:

rm -r ~/.emacs.d/eln-cache

The Emacs must be interactive, and you can reproduce quickly as follows:

src/emacs -Q --eval '(setq invocation-name "emacs-leaks")' --eval '(mh-version)'

In a few seconds the echo area will say: "Creating pipe: Too many open files"

What should appear in the echo area: "nmh 1.7.1 installed as MH variant"
or maybe: "No MH variant found on the system"

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