'make check' fails on a machine with IPv6 disabled.

[trustin]

During a make check run, I see the following failures:

    io::net::tcp::test::multiple_connect_serial_ip6::green
    io::net::tcp::test::multiple_connect_serial_ip6::native
    io::net::tcp::test::read_eof_twice_ip6::green
    io::net::tcp::test::read_eof_twice_ip6::native
    io::net::tcp::test::smoke_test_ip6::green
    io::net::tcp::test::smoke_test_ip6::native
    io::net::tcp::test::socket_and_peer_name_ip6::green
    io::net::tcp::test::socket_and_peer_name_ip6::native
    io::net::tcp::test::tcp_clone_two_read::green
    io::net::tcp::test::tcp_clone_two_read::native
    io::net::tcp::test::write_close_ip6::green
    io::net::tcp::test::write_close_ip6::native
    io::net::udp::test::socket_name_ip6::green
    io::net::udp::test::socket_name_ip6::native
    io::net::udp::test::socket_smoke_test_ip6::green
    io::net::udp::test::socket_smoke_test_ip6::native
    io::net::udp::test::stream_smoke_test_ip6::green
    io::net::udp::test::stream_smoke_test_ip6::native

.. which seems obviously related with IPv6, which is disabled on my machine. Perhaps these tests could be ignored if the system has no IPv6.

(master, Arch Linux 64-bit 3.10.32-1-lts)

[alexcrichton]

Detecting whether ipv6 is enabled/disabled on a machine is very platform specific, and likely not worth it. Disabling ipv6 support these days is likely manual, so I imagine that the test failures are fairly self-evident.

The tests properly fail and don't cause any badness with other parts of the system, so they're failing properly if you have ipv6 disabled. Closing because I think that handling this isn't quite worth it and everything is working as intended.

tl;dr: ignore this; it's just to add more info so it's easier to find this issue.

Just in case someone else is searching for the text of the error(instead of ip6 or ipv6), I would like to add it here:

`Err` value: Address family not supported by protocol'

Actual output (of command time make check):

...
test rand::bench::rand_std ... ignored
test rand::bench::rand_xorshift ... ignored

failures:

---- io::net::tcp::test::clone_while_reading stdout ----
thread 'io::net::tcp::test::clone_while_reading' panicked at 'called `Result::unwrap()` on an `Err` value: Address family not supported by protocol', /home/emacs/build/rust/src/libcore/result.rs:742


---- io::net::tcp::test::connect_ip6_loopback stdout ----
thread 'io::net::tcp::test::connect_ip6_loopback' panicked at 'called `Result::unwrap()` on an `Err` value: Address family not supported by protocol', /home/emacs/build/rust/src/libcore/result.rs:742


---- io::net::tcp::test::multiple_connect_serial_ip6 stdout ----
thread 'io::net::tcp::test::multiple_connect_serial_ip6' panicked at 'called `Result::unwrap()` on an `Err` value: Address family not supported by protocol', /home/emacs/build/rust/src/libcore/result.rs:742


---- io::net::tcp::test::read_timeouts stdout ----
thread 'io::net::tcp::test::read_timeouts' panicked at 'called `Result::unwrap()` on an `Err` value: Address family not supported by protocol', /home/emacs/build/rust/src/libcore/result.rs:742


---- io::net::tcp::test::readwrite_timeouts stdout ----
thread 'io::net::tcp::test::readwrite_timeouts' panicked at 'called `Result::unwrap()` on an `Err` value: Address family not supported by protocol', /home/emacs/build/rust/src/libcore/result.rs:742


---- io::net::tcp::test::socket_and_peer_name_ip6 stdout ----
thread 'io::net::tcp::test::socket_and_peer_name_ip6' panicked at 'called `Result::unwrap()` on an `Err` value: Address family not supported by protocol', /home/emacs/build/rust/src/libcore/result.rs:742


---- io::net::tcp::test::smoke_test_ip6 stdout ----
thread 'io::net::tcp::test::smoke_test_ip6' panicked at 'called `Result::unwrap()` on an `Err` value: Address family not supported by protocol', /home/emacs/build/rust/src/libcore/result.rs:742


---- io::net::tcp::test::tcp_clone_two_read stdout ----
thread 'io::net::tcp::test::tcp_clone_two_read' panicked at 'called `Result::unwrap()` on an `Err` value: Address family not supported by protocol', /home/emacs/build/rust/src/libcore/result.rs:742


---- io::net::tcp::test::timeout_concurrent_read stdout ----
thread 'io::net::tcp::test::timeout_concurrent_read' panicked at 'called `Result::unwrap()` on an `Err` value: Address family not supported by protocol', /home/emacs/build/rust/src/libcore/result.rs:742


---- io::net::tcp::test::write_timeouts stdout ----
thread 'io::net::tcp::test::write_timeouts' panicked at 'called `Result::unwrap()` on an `Err` value: Address family not supported by protocol', /home/emacs/build/rust/src/libcore/result.rs:742



failures:
io::net::tcp::test::clone_while_reading
io::net::tcp::test::connect_ip6_loopback
io::net::tcp::test::multiple_connect_serial_ip6
io::net::tcp::test::read_eof_twice_ip6
io::net::tcp::test::read_timeouts
io::net::tcp::test::readwrite_timeouts
io::net::tcp::test::smoke_test_ip6
io::net::tcp::test::socket_and_peer_name_ip6
io::net::tcp::test::tcp_clone_two_read
io::net::tcp::test::timeout_concurrent_read
io::net::tcp::test::write_close_ip6
io::net::tcp::test::write_timeouts
io::net::udp::test::socket_name_ip6
io::net::udp::test::socket_smoke_test_ip6

test result: FAILED. 744 passed; 14 failed; 62 ignored; 0 measured

thread '' panicked at 'Some tests failed', /home/emacs/build/rust/src/libtest/lib.rs:251
/home/emacs/build/rust/mk/tests.mk:457: recipe for target 'tmp/check-stage2-T-x86_64-unknown-linux-gnu-H-x86_64-unknown-linux-gnu-std.ok' failed
make: *** [tmp/check-stage2-T-x86_64-unknown-linux-gnu-H-x86_64-unknown-linux-gnu-std.ok] Error 101

real 29m30.325s
user 43m22.983s
sys 3m56.053s

I have ipv6.disable=1 on kernel cmdline and also ipv6 is disabled at compilation time of the kernel.

tested with (latest)commit: 4be79d6