Re: How can empty generated files in the store happen? Has someone experienced this?

[Ashish SHUKLA]

El 2025-04-07 21:53, Nicolas Graves escribió:

As in my critical december failure, I happen once again to have empty

path `/gnu/store/31s8mcacwk8mma2kkxak13aawxqp58fg-module-import.drv' was 
modified! expected hash 
`274fd21f99bd7505109a1b348d1c46b93a418cb193710b25463a7b06906e82ce', got 
`77ac62e2629d8e45f624589c0c8bf99e24b3a722349bf1e79bc186008534e246'
path `/gnu/store/5495sw004194zdmmw50s5fgh9ym6p99r-kexec-load-system.scm' was 
modified! expected hash 
`77e18169214f6d9b13a6c6d0b0b451344f46fd07fe75dca8e506fdd75bc00982', got 
`34e00b8592a6ad465851a46a67464e076102fd5106ca6cb33a2f15009d30d590'
error: error parsing derivation 
`/gnu/store/rs1lp7lbb6ab6sf67gg8b91kf4hahhrg-kexec-load-system.scm.drv': 
expected string `Derive(['
error: error parsing derivation 
`/gnu/store/l0hs8cydj71z1l38d79bjzizr2lmarq9-upgrade-shepherd-services.scm.drv':
 expected string `Derive(['
path `/gnu/store/793bzzxy43slryabjqajwi9jri5cby26-module-import-builder' was 
modified! expected hash
`e33b72af5b867cc868e4804ffe6bcbac6693b043777a9dfdd2a92d488c5ac867', got
`77ac62e2629d8e45f624589c0c8bf99e24b3a722349bf1e79bc186008534e246'

How can that even happen?  I have a customized but pretty normal usage
of guix.

I use a btrfs file system, I don't if it can be the culprit, but this is
extremely annoying, as it can even break boots (if a boot configuration file
is empty).

files for files expected in my store:

My two cents:

I noticed it happening a few times with me, on ext4, xfs, and btrfs, with/without LUKS, and 
on amd64/aarch64 real/virtual platforms with linux-libre, and linux-xanmod (from nonguix) 
> 6.10. I had "discard" filesystem mount option enabled (as I'm on a SSD based 
system), which I had to disable in favour of fstrim service.

At Guix days 2025, someone pointed out Samsung drives (which I am using, at 
least on my real) had some known firmware issues in the past.

On my btrfs computer, I enabled snapper service.

And ofcourse, I also decided to stop rebooting my computers, instead choosing 
to shutdown. kexec, and suspend to RAM are not quite deterministic, so reboot 
it's.

Oddly enough, I used NixOS on the same hardware for two years, and it never 
happened there.

--
Ashish SHUKLA | GPG: F682 CDCC 39DC 0FEA E116  20B6 C746 CFA9 E74F A4B0

"If I destroy you, what business is it of yours ?" (Dark Forest, Liu Cixin)

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