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bug#29363: Single test failure building Guix


From: Marius Bakke
Subject: bug#29363: Single test failure building Guix
Date: Tue, 21 Nov 2017 01:31:04 +0100
User-agent: Notmuch/0.25.2 (https://notmuchmail.org) Emacs/25.3.1 (x86_64-pc-linux-gnu)

Hi Rutger,

Rutger Helling <address@hidden> 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?

From bdc7b5310111e21801529ea57e290f6eb72ac6ed Mon Sep 17 00:00:00 2001
From: Marius Bakke <address@hidden>
Date: Tue, 21 Nov 2017 00:27:08 +0100
Subject: [PATCH] gnu: guix: Disable test that fails on Btrfs.

Works around <https://bugs.gnu.org/29363>.
Reported by Rutger Helling <address@hidden>.

* gnu/packages/package-management.scm (guix)[arguments]: Rename
'disable-container-tests' phase to 'disable-failing-tests' and add substitution
to disable "dead path can be explicitly collected" test.
---
 gnu/packages/package-management.scm | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/gnu/packages/package-management.scm 
b/gnu/packages/package-management.scm
index 4f1f7f577..3321ab1eb 100644
--- a/gnu/packages/package-management.scm
+++ b/gnu/packages/package-management.scm
@@ -169,8 +169,7 @@
                         (copy "armhf")
                         (copy "aarch64")
                         #t))
-                    (add-after
-                        'unpack 'disable-container-tests
+                    (add-after 'unpack 'disable-failing-tests
                       ;; XXX FIXME: These tests fail within the build 
container.
                       (lambda _
                         (substitute* "tests/syscalls.scm"
@@ -183,6 +182,11 @@
                           (substitute* "tests/guix-environment-container.sh"
                             (("guix environment --version")
                              "exit 77\n")))
+                        ;; XXX: This test may fail on some file systems.
+                        ;; See <https://bugs.gnu.org/29363>.
+                        (substitute* "tests/store.scm"
+                          (("^(.*dead path can be explicitly collected\")" all)
+                           (string-append "(test-skip 1)\n" all)))
                         #t))
                     (add-before 'check 'set-SHELL
                       (lambda _
-- 
2.15.0

Ludo, WDYT?

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