GNU bug report logs - #71183
elogind tests fail on QEMU riscv64-linux but not native with identical derivations

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Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Richard Sent <richard <at> freakingpenguin.com>
To: bug-guix <at> gnu.org
Subject: elogind tests fail on QEMU riscv64-linux but not native with
 identical derivations
Date: Fri, 24 May 2024 23:40:32 -0400

[Message part 1 (text/plain, inline)]

Hi Guix!

Building elogind fails due to a failing test on a QEMU riscv64 build:

--8<---------------cut here---------------start------------->8---
gibraltar :) guix$ guix describe
Generation 77	May 24 2024 00:15:41	(current)
  guix 9901416
    repository URL: https://git.savannah.gnu.org/git/guix.git
    branch: master
    commit: 9901416233867233192b63fde7f616751127b189
gibraltar :) guix$ guix build elogind --system=riscv64-linux
--8<---------------cut here---------------end--------------->8---

I'll attach the full build log to this message. Here's the brief output:

--8<---------------cut here---------------start------------->8---
 85/143 elogind:test / test-mountpoint-util                       FAIL            0.03s   killed by signal 6 SIGABRT
# snip
mnt ids of /gnu/store/vaznv17j32jky10bi6942fdfxh7awl67-python-minimal-3.10.7 are 739 (from /proc/self/mountinfo), 0 (from path_get_mnt_id()).
Assertion 'q = hashmap_get(h, INT_TO_PTR(mnt_id2))' failed at src/test/test-mountpoint-util.c:104, function test_mnt_id(). Aborting.
--8<---------------cut here---------------end--------------->8---

When the build is done natively (thanks for the VisionFive2 image!), it
succeeds even though the derivation hash is the same.

--8<---------------cut here---------------start------------->8---
# QEMU
gibraltar :( guix$ guix build elogind --no-grafts --derivations --system=riscv64-linux
/gnu/store/cjbqi2shgn2a99zmwbiqp1kaa7x0zpik-elogind-252.9.drv
# Native
root <at> visionfive2 ~# guix build elogind --no-grafts --derivations
/gnu/store/cjbqi2shgn2a99zmwbiqp1kaa7x0zpik-elogind-252.9.drv
--8<---------------cut here---------------end--------------->8---

I tried disabling just that one test, but it seemed to cause another
failure. I haven't investigated beyond that.

[bqi2shgn2a99zmwbiqp1kaa7x0zpik-elogind-252.9.drv.gz (application/octet-stream, attachment)]

[bqi2shgn2a99zmwbiqp1kaa7x0zpik-elogind-252.9.drv.gz (application/octet-stream, attachment)]

[Message part 4 (text/plain, inline)]

-- 
Take it easy,
Richard Sent
Making my computer weirder one commit at a time.

Message #12 received at 71183-done <at> debbugs.gnu.org (full text, mbox):

From: Maxim Cournoyer <maxim.cournoyer <at> gmail.com>
To: Richard Sent <richard <at> freakingpenguin.com>
Cc: GNU Debbugs <control <at> debbugs.gnu.org>, 71183-done <at> debbugs.gnu.org
Subject: Re: bug#71183: elogind tests fail on QEMU riscv64-linux but not
 native with identical derivations
Date: Tue, 18 Mar 2025 14:45:41 +0900

tag 71183 + notabug
quit

Hi Richard,

Richard Sent <richard <at> freakingpenguin.com> writes:

> Hi Guix!
>
> Building elogind fails due to a failing test on a QEMU riscv64 build:
>
> gibraltar :) guix$ guix describe
> Generation 77	May 24 2024 00:15:41	(current)
>   guix 9901416
>     repository URL: https://git.savannah.gnu.org/git/guix.git
>     branch: master
>     commit: 9901416233867233192b63fde7f616751127b189
> gibraltar :) guix$ guix build elogind --system=riscv64-linux
>
>
> I'll attach the full build log to this message. Here's the brief output:
>
>  85/143 elogind:test / test-mountpoint-util                       FAIL            0.03s   killed by signal 6 SIGABRT
> # snip
> mnt ids of /gnu/store/vaznv17j32jky10bi6942fdfxh7awl67-python-minimal-3.10.7 are 739 (from /proc/self/mountinfo), 0 (from path_get_mnt_id()).
> Assertion 'q = hashmap_get(h, INT_TO_PTR(mnt_id2))' failed at src/test/test-mountpoint-util.c:104, function test_mnt_id(). Aborting.
>
>
> When the build is done natively (thanks for the VisionFive2 image!), it
> succeeds even though the derivation hash is the same.
>
> # QEMU
> gibraltar :( guix$ guix build elogind --no-grafts --derivations --system=riscv64-linux
> /gnu/store/cjbqi2shgn2a99zmwbiqp1kaa7x0zpik-elogind-252.9.drv
> # Native
> root <at> visionfive2 ~# guix build elogind --no-grafts --derivations
> /gnu/store/cjbqi2shgn2a99zmwbiqp1kaa7x0zpik-elogind-252.9.drv
>
> I tried disabling just that one test, but it seemed to cause another
> failure. I haven't investigated beyond that.

That's not special to elogind; there are quite a few instances where the
emulator behaves differently enough to break tests.  It's interesting,
but it's a QEMU bug, not a Guix bug though.  I encourage you to open the
issue with/engage with upstream QEMU if you have an interest in
resolving it (which would be valuable to Guix as well).

-- 
Thanks,
Maxim

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