Guix segfaults, how do I roll back?

Guix segfaults, how do I roll back?

[Wiktor Żelazny]

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Dear list,

I just ran `guix pull` and the upgraded guix is greeting me with
Segmentation fault. How shall I proceed? Is it a good idea and is it
safe to relink ~/.config/guix/current from
/var/guix/profiles/per-user/$USERNAME/current-guix to the preceding
profile?

I’m on Guix System.

Have a nice weekend,

WŻ

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Re: Guix segfaults, how do I roll back?

[Ricardo Wurmus]

Wiktor Żelazny <wz@freeshell.de> writes:

> I just ran `guix pull` and the upgraded guix is greeting me with
> Segmentation fault. How shall I proceed? Is it a good idea and is it
> safe to relink ~/.config/guix/current from
> /var/guix/profiles/per-user/$USERNAME/current-guix to the preceding
> profile?

You can use the previous Guix to roll back.  Instead of using “guix”
just run
/var/guix/profiles/per-user/$USERNAME/current-guix-110-link/bin/guix
where the number corresponds to one before the current generation.

That said: a segfault is highly unusual.  Make sure that LD_LIBRARY_PATH
is not set.  (It forces potentially incompatible libraries to be loaded,
which is a good way to trigger segfaults due to ABI differences.)

-- 
Ricardo

Re: Guix segfaults, how do I roll back?

[Wiktor Żelazny]

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On Sat, Dec 18, 2021 at 05:01:58PM +0100, Ricardo Wurmus wrote:

> just run
> /var/guix/profiles/per-user/$USERNAME/current-guix-110-link/bin/guix

Thank you, Ricardo, for this simple solution.

> Make sure that LD_LIBRARY_PATH is not set.

It is set, but after `unset LD_LIBRARY_PATH` Guix keeps segfaulting.
However, this

   $ /var/guix/profiles/per-user/$USERNAME/current-guix-152-link/bin/guix shell -C guix -- guix --version
   guix (GNU Guix) 1.3.0-13.8cc099b
   Copyright (C) 2021 the Guix authors
   License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
   This is free software: you are free to change and redistribute it.
   There is NO WARRANTY, to the extent permitted by law.

works, and returns a newer commit than

   $ /var/guix/profiles/per-user/$USERNAME/current-guix-152-link/bin/guix --version
   guix (GNU Guix) b3a801330ed1c126a215fa8e3ff2aea0880eeba8
   Copyright (C) 2021 the Guix authors
   License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
   This is free software: you are free to change and redistribute it.
   There is NO WARRANTY, to the extent permitted by law.

, so I assume that it is the new Guix, without a segfault when in a
container.

WŻ

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