Hi Rutger,

Rutger Helling <rhelling@mykolab.com> writes:

> when building Guix with 'guix build guix' I keep running into a single 
> test failure. I've attached the test-suite.log.

Is this a Btrfs system by any chance, possibly on an SSD?

> test-name: dead path can be explicitly collected
> location: /tmp/guix-build-guix-0.13.0-10.0b4c385.drv-0/source/tests/store.scm:178
> source:
> + (test-assert
> +   "dead path can be explicitly collected"
> +   (let ((p (add-text-to-store
> +              %store
> +              "random-text"
> +              (random-text)
> +              '())))
> +     (let-values
> +       (((paths freed) (delete-paths %store (list p))))
> +       (and (equal? paths (list p))
> +            (> freed 0)
> +            (not (file-exists? p))))))
> actual-value: #f
> result: FAIL

I can reproduce this error on two different systems that have
Btrfs+LUKS+SSD, and the problem is that freed == 0.

I suspect it's related to Btrfs' "lazy" reporting of disk space, but
haven't dug very far.

Until we figure out what's going on, I suggest applying the patch
below.  Can you confirm that it works on your system?