Subject: bug#27039: (tests guix-download) fails when DNS is bogus

From: <[email-masked]>
Date: Tue, 23 May 2017 19:07:23 +0200 (CEST)

On Tue, 23 May 2017 12:24:31 -0400, Leo Famulari <[email-masked]> wrote:

> The guix-download test includes this snippet:
> 
> ------
> # Make sure it fails here.
> if guix download http://does.not/exist
> then false; else true; fi
> ------
> 
> Unfortunately, many ISPs (such as T-Mobile) return bogus results for
> otherwise unclaimed domain names, causing this test to fail.
> 
> Does anyone know if there is some domain that is designed to fail as a
> "standard", as <http://example.com> is intended to be used for examples
> of good domains?

http://fail.0

fails to resolve with "ping: bad address 'fail.0'. This was run on an OpenNIC connected computer.