bug#26936: grub_cmd_set_date test sometimes fail

[Marius Bakke <mbakke@fastmail.com>]

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Leo Famulari <leo@famulari.name> writes:

> On Fri, Jun 23, 2017 at 03:30:10PM -0400, Leo Famulari wrote:
>> On Sat, Jun 03, 2017 at 12:54:46AM +0200, Ludovic Courtès wrote:
>> > FAIL: grub_cmd_set_date
>> 
>> > All in all, I’m tempted to think this has to do with running the tests
>> > in parallel.
>> > 
>> > As a stop-gap measure, I’ve committed a change to run tests
>> > sequentially.  With this “guix build grub --rounds=5” passes for on my
>> > x86_64 laptop.  Let’s reopen the bug if we find that’s not enough.
>> 
>> This test just failed for me on x86_64, even with #:parallel-tests? #f.
>> 
>> So, perhaps it's not an inter-test race, or perhaps the tests are still
>> running in parallel, or some other thing.
>
> Spurred by another report of this test failing, here's a patch to
> disable it completely.
> From 71299a035f793c3e2ac723b326cd881e97df6274 Mon Sep 17 00:00:00 2001
> From: Leo Famulari <leo@famulari.name>
> Date: Sat, 24 Jun 2017 13:17:37 -0400
> Subject: [PATCH] gnu: grub: Disable a flaky test.
>
> * gnu/packages/bootloaders.scm (grub)[arguments]: Add 'disable-flaky-test' phase
> and run the tests in parallel.

LGTM.

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