GNU logs - #76959, boring messages

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Subject: bug#76959: Empty Scheme files in system generation, breaks `guix system` and boot
Resent-From: Leo Famulari <leo@HIDDEN>
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From: Leo Famulari <leo@HIDDEN>
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In recent days, I reconfigured my system in the same way that I always
do it.

The resulting system was malformed, preventing boot and the use of `guix
system`.

Specifically, the files that make up the system itself --- such as
'/var/guix/profiles/system-NNN-link/parameters' --- are empty! Zero
bytes.

IIRC, I was able to work around it by running the activation scripts
from an older generation "by hand", but I don't remember for sure if
this was sufficient or not. For example:

`guile -s /var/guix/profiles/system-NNN-link/activate`

I didn't report this to bug-guix (although I did complain on #guix),
because I thought it was just me, but now another user on #guix has the
same problem:

https://logs.guix.gnu.org/guix/2025-03-11.log#205907

`guix gc --verify=contents` reported all the broken files. Repair was
not possible for most of them.

`btrfs scrub` was successful, and memtest86+ passed 9 times, so I'm
relatively confident in the filesystem and the hardware.

I don't have a handle on the relevant details, but here is some system
information:

------
# cat /etc/fstab 
# This file was generated from your Guix configuration.  Any changes
# will be lost upon reboot or reconfiguration.

UUID=287d4ed7-7fc8-4726-8882-fbe1f71fe7cd       /       btrfs   defaults
UUID=3A45-1EB8  /boot/efi       vfat    defaults
# guix system describe
Generation 92   Mar 10 2025 14:02:20    (current)
  file name: /var/guix/profiles/system-92-link
  canonical file name: /gnu/store/ws8gp0ylxppqxbraac14r0crk1jam7n3-system
  label: GNU with Linux 6.13.6
  bootloader: grub-efi
  root device: UUID: 287d4ed7-7fc8-4726-8882-fbe1f71fe7cd
  kernel: /gnu/store/bk469qvagzgxjvxbvj7myplyxzqa9qk0-linux-6.13.6/bzImage
  channels:
    nonguix:
      repository URL: https://gitlab.com/nonguix/nonguix
      branch: master
      commit: 944619c1947ba59823f4ad6d8b13842b7e162d76
    guix:
      repository URL: https://git.savannah.gnu.org/git/guix.git
      branch: kernel-updates
      commit: ccf4b131e489f6845a041d566bbd1ce929324faa
  configuration file: /gnu/store/aa5dq0j4ag28zf2vlr3n0jv8p2wi5y4s-configuration.scm
------

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From: help-debbugs@HIDDEN (GNU bug Tracking System)
To: Leo Famulari <leo@HIDDEN>
Subject: bug#76959: Acknowledgement (Empty Scheme files in system
 generation, breaks `guix system` and boot)
Message-ID: <handler.76959.B.174172505815167.ack <at> debbugs.gnu.org>
References: <Z9CdNwX8vaD5UPtG@HIDDEN>
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Date: Tue, 11 Mar 2025 20:31:02 +0000

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From: Felix Lechner <felix.lechner@HIDDEN>
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Subject: May prevent reboots, ergo grave
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severity 76959 grave
thanks

Message sent to bug-guix@HIDDEN:

Subject: bug#76959: Empty Scheme files in system generation, breaks `guix system` and boot
Resent-From: Tomas Volf <~@wolfsden.cz>
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To: Leo Famulari <leo@HIDDEN>
Cc: 76959 <at> debbugs.gnu.org
From: Tomas Volf <~@wolfsden.cz>
In-Reply-To: <Z9CdNwX8vaD5UPtG@HIDDEN> (Leo Famulari's message of "Tue,
 11 Mar 2025 16:29:43 -0400")
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Date: Tue, 11 Mar 2025 21:43:38 +0100
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--=-=-=
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Leo Famulari <leo@HIDDEN> writes:

> I didn't report this to bug-guix (although I did complain on #guix),
> because I thought it was just me, but now another user on #guix has the
> same problem:
>
> https://logs.guix.gnu.org/guix/2025-03-11.log#205907
>
> `guix gc --verify=3Dcontents` reported all the broken files. Repair was
> not possible for most of them.

I do not really have any useful information to add, but this was
happening to me as well over the past *months*.  Happens occasionally,
both in QEMU and on real HW.  BTRFS scrub is always fine, and just (some
of) *new* items copied during the deploy are corrupted.

Since no one else reported anything, I assumed it was just me.  I cannot
really reproduce it, so I have just assumed I keep "holding it wrong".

The trick with running the activation script by hand is much
appreciated, usually the recovery was fairly painful process.

Tomas

=2D-=20
There are only two hard things in Computer Science:
cache invalidation, naming things and off-by-one errors.

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