Re: Test failure when building libarchive-3.1.2

[ludo@gnu.org (Ludovic Courtès)]

Jan Synáček <jan.synacek@gmail.com> skribis:

> On Sat, Nov 14, 2015 at 12:40 PM, Ludovic Courtès <ludo@gnu.org> wrote:
>> Jan Synáček <jan.synacek@gmail.com> skribis:
>>
>>> Reference files will be read from:
>>> /tmp/nix-build-libarchive-3.1.2.drv-0/libarchive-3.1.2/tar/test
>>> Running tests on:
>>> "/tmp/nix-build-libarchive-3.1.2.drv-0/libarchive-3.1.2/./bsdtar"
>>> Exercising: bsdtar 3.1.2 - libarchive 3.1.2
>>
>> [...]
>>
>>>  17: test_option_b                                     FAIL
>>
>> Ricardo reported the same issue a while back:
>>
>>   https://lists.gnu.org/archive/html/guix-devel/2015-03/msg00182.html
>>
>> What platform is this on, i686?
>>
>> It would be nice to see if this systematically fails.  If it is
>> non-deterministic, we should build it with --keep-failed until it fails
>> (removing successful builds with ‘guix gc -d’), collect useful info from
>> the build tree, and debug.
>>
>> (You can also work around it by enabling substitutes since Hydra had no
>> problems building it.)
>>
>> Ludo’.
>
> In my case the build fails always. I'm running guix on Fedora 23, x86_64.

What file system is this on?

I’ve run several builds on my x86_64 GuixSD, ext4, but I’ve failed to
reproduce the test failure.

I noticed that libarchive uses ‘readdir’ calls as-is, without sorting
directory entries afterwards.  Thus, the order of directory entries is
effectively non-deterministic and may change depending on the phase of
the moon.

This has been reported at:

  https://github.com/libarchive/libarchive/issues/602

Could you add the patch that’s given at that URL to the ‘patches’ field
or libarchive’s ‘origin’ form and see if the problem shows up again,
preferably building several times in a row?

At any rate we’ll probably apply the patch.

Thanks,
Ludo’.