bug#41042: Compilation (Comint) is consistently killed when run with default directory /sudo::root

bug#41042: Compilation (Comint) is consistently killed when run with default directory /sudo::root

[akater]

[-- Attachment #1: Type: text/plain, Size: 574 bytes --]

I'm using Emacs 28.0.50 (build 1, x86_64-pc-linux-uclibc) of 2020-05-03.

Compilation processes started with #'compile are killed after some time
when default-directory is let-bound to /sudo::/

Example:

emacs -Q

(require 'tramp)
(require 'compile)
(let ((default-directory "/sudo::/")) (compile "sleep 300"))

This started to happen between January 1 and April 30 (most likely
between March 1 and April 15 but I can't be completely sure).  I'm
calling such code regularly; it is used by ebuild-mode package in the
main Gentoo repository.

(compile "sudo ..") works fine.

[-- Attachment #2: signature.asc --]
[-- Type: application/pgp-signature, Size: 800 bytes --]

bug#41042: Compilation (Comint) is consistently killed when run with default directory /sudo::root

[Michael Albinus]

akater <nuclearspace@gmail.com> writes:

Hi,

> I'm using Emacs 28.0.50 (build 1, x86_64-pc-linux-uclibc) of 2020-05-03.
>
> Compilation processes started with #'compile are killed after some time
> when default-directory is let-bound to /sudo::/
>
> Example:
>
> emacs -Q
>
> (require 'tramp)
> (require 'compile)
> (let ((default-directory "/sudo::/")) (compile "sleep 300"))
>
> This started to happen between January 1 and April 30 (most likely
> between March 1 and April 15 but I can't be completely sure).  I'm
> calling such code regularly; it is used by ebuild-mode package in the
> main Gentoo repository.

Well, this is hit by a recent change, that tramp-cleanup-connection
kills now *all* connection related processes. This should not happen for
remote asynchronous processes belonging to a connection with a session
timeout like "sudo". I've fixed this in master, could you please check?

Best regards, Michael.

bug#41042: Compilation (Comint) is consistently killed when run with default directory /sudo::root

[akater]

[-- Attachment #1: Type: text/plain, Size: 236 bytes --]


Thank you, everything is fine now.

It looks like not many users of live Emacs builds also use compile over
tramp feature, as this haven't been reported earlier.  That's
unexpected.  (I build and install ≈everything this way.)

[-- Attachment #2: signature.asc --]
[-- Type: application/pgp-signature, Size: 800 bytes --]

bug#41042: Compilation (Comint) is consistently killed when run with default directory /sudo::root

[Michael Albinus]

akater <nuclearspace@gmail.com> writes:

Hi,

> Thank you, everything is fine now.

Thanks for the confirmation, I'm closing the bug.

> It looks like not many users of live Emacs builds also use compile over
> tramp feature, as this haven't been reported earlier.  That's
> unexpected.  (I build and install ≈everything this way.)

Well, this happens only for Tramp connections which have a session
timeout (sudo, doas) and for compilations which run longer than the
timeout (300 sec per default). Perhaps this doesn't happen for the
majority of users.

Best regards, Michael.