[Pkg-rust-maintainers] Bug#842634: Bug#842634: rustc: FTBFS (sys_common::net::tests::no_lookup_host_duplicates fails)

[Santiago Vila]

Hi.

After I removed the ::1 line from /etc/hosts, rustc builds ok again.

I wonder, however, why two lines like this in /etc/hosts

127.0.0.1       localhost
127.0.0.1       localhost ip6-localhost ip6-loopback

should make rustc build to fail at all.

Could you please quote the relevant standard?

The tests that are performed after a program has been compiled are
supposed to check that the program is ok, not to check that the
machine is ok, unless, of course, problems in the machine are known to
affect the build itself.

Please tell me: How does the existence of two lines having 127.0.0.1
(both being "localhost") affect any of the other tests?

Thanks.