[INFO] fetching crate ping 0.2.0...
[INFO] testing ping-0.2.0 against master#99e3aef02079e9c10583638520cd0c134dc3a01d for pr-85530
[INFO] extracting crate ping 0.2.0 into /workspace/builds/worker-1/source
[INFO] validating manifest of crates.io crate ping 0.2.0 on toolchain 99e3aef02079e9c10583638520cd0c134dc3a01d
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+99e3aef02079e9c10583638520cd0c134dc3a01d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate ping 0.2.0
[INFO] finished tweaking crates.io crate ping 0.2.0
[INFO] tweaked toml for crates.io crate ping 0.2.0 written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+99e3aef02079e9c10583638520cd0c134dc3a01d" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+99e3aef02079e9c10583638520cd0c134dc3a01d" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+99e3aef02079e9c10583638520cd0c134dc3a01d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 11bf2fe945d45527ea0967d31a3858f2bd35bce0a7529f44ffc92980d04cc05c
[INFO] running `Command { std: "docker" "start" "-a" "11bf2fe945d45527ea0967d31a3858f2bd35bce0a7529f44ffc92980d04cc05c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "11bf2fe945d45527ea0967d31a3858f2bd35bce0a7529f44ffc92980d04cc05c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "11bf2fe945d45527ea0967d31a3858f2bd35bce0a7529f44ffc92980d04cc05c", kill_on_drop: false }`
[INFO] [stdout] 11bf2fe945d45527ea0967d31a3858f2bd35bce0a7529f44ffc92980d04cc05c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+99e3aef02079e9c10583638520cd0c134dc3a01d" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f944fc2b1f11a0f08651203c295e661e5ae2340f751ee5ecb65234744efd1cbd
[INFO] running `Command { std: "docker" "start" "-a" "f944fc2b1f11a0f08651203c295e661e5ae2340f751ee5ecb65234744efd1cbd", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.95
[INFO] [stderr]    Compiling cfg-if v1.0.0
[INFO] [stderr]    Compiling cc v1.0.68
[INFO] [stderr]    Compiling miniz_oxide v0.4.4
[INFO] [stderr]    Compiling getrandom v0.1.16
[INFO] [stderr]    Compiling socket2 v0.3.19
[INFO] [stderr]    Compiling backtrace v0.3.60
[INFO] [stderr]    Compiling rand_core v0.5.1
[INFO] [stderr]    Compiling rand_chacha v0.2.2
[INFO] [stderr]    Compiling rand v0.7.3
[INFO] [stderr]    Compiling failure v0.1.8
[INFO] [stderr]    Compiling ping v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/errors.rs:11:32
[INFO] [stdout]    |
[INFO] [stdout] 11 |     fn cause(&self) -> Option<&Fail> {
[INFO] [stdout]    |                                ^^^^ help: use `dyn`: `dyn Fail`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/ping.rs:35:9
[INFO] [stdout]    |
[INFO] [stdout] 35 |         try!(Socket::new(Domain::ipv4(), Type::raw(), Some(Protocol::icmpv4())))
[INFO] [stdout]    |         ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/ping.rs:40:9
[INFO] [stdout]    |
[INFO] [stdout] 40 |         try!(Socket::new(Domain::ipv6(), Type::raw(), Some(Protocol::icmpv6())))
[INFO] [stdout]    |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/ping.rs:45:5
[INFO] [stdout]    |
[INFO] [stdout] 45 |     try!(socket.send_to(&mut buffer, &dest.into()));
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/ping.rs:50:5
[INFO] [stdout]    |
[INFO] [stdout] 50 |     try!(socket.recv_from(&mut buffer));
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `reply`
[INFO] [stdout]   --> src/ping.rs:52:9
[INFO] [stdout]    |
[INFO] [stdout] 52 |     let reply = if dest.is_ipv4() {
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_reply`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.39s
[INFO] running `Command { std: "docker" "inspect" "f944fc2b1f11a0f08651203c295e661e5ae2340f751ee5ecb65234744efd1cbd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f944fc2b1f11a0f08651203c295e661e5ae2340f751ee5ecb65234744efd1cbd", kill_on_drop: false }`
[INFO] [stdout] f944fc2b1f11a0f08651203c295e661e5ae2340f751ee5ecb65234744efd1cbd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+99e3aef02079e9c10583638520cd0c134dc3a01d" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 95ff0ae0517bfa88a4983be6f8bd0ec118f143eaec1d9a6e9c729ea688fa74a7
[INFO] running `Command { std: "docker" "start" "-a" "95ff0ae0517bfa88a4983be6f8bd0ec118f143eaec1d9a6e9c729ea688fa74a7", kill_on_drop: false }`
[INFO] [stderr]    Compiling ping v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/errors.rs:11:32
[INFO] [stdout]    |
[INFO] [stdout] 11 |     fn cause(&self) -> Option<&Fail> {
[INFO] [stdout]    |                                ^^^^ help: use `dyn`: `dyn Fail`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/ping.rs:35:9
[INFO] [stdout]    |
[INFO] [stdout] 35 |         try!(Socket::new(Domain::ipv4(), Type::raw(), Some(Protocol::icmpv4())))
[INFO] [stdout]    |         ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/ping.rs:40:9
[INFO] [stdout]    |
[INFO] [stdout] 40 |         try!(Socket::new(Domain::ipv6(), Type::raw(), Some(Protocol::icmpv6())))
[INFO] [stdout]    |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/ping.rs:45:5
[INFO] [stdout]    |
[INFO] [stdout] 45 |     try!(socket.send_to(&mut buffer, &dest.into()));
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/ping.rs:50:5
[INFO] [stdout]    |
[INFO] [stdout] 50 |     try!(socket.recv_from(&mut buffer));
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `reply`
[INFO] [stdout]   --> src/ping.rs:52:9
[INFO] [stdout]    |
[INFO] [stdout] 52 |     let reply = if dest.is_ipv4() {
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_reply`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/errors.rs:11:32
[INFO] [stdout]    |
[INFO] [stdout] 11 |     fn cause(&self) -> Option<&Fail> {
[INFO] [stdout]    |                                ^^^^ help: use `dyn`: `dyn Fail`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/ping.rs:35:9
[INFO] [stdout]    |
[INFO] [stdout] 35 |         try!(Socket::new(Domain::ipv4(), Type::raw(), Some(Protocol::icmpv4())))
[INFO] [stdout]    |         ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/ping.rs:40:9
[INFO] [stdout]    |
[INFO] [stdout] 40 |         try!(Socket::new(Domain::ipv6(), Type::raw(), Some(Protocol::icmpv6())))
[INFO] [stdout]    |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/ping.rs:45:5
[INFO] [stdout]    |
[INFO] [stdout] 45 |     try!(socket.send_to(&mut buffer, &dest.into()));
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/ping.rs:50:5
[INFO] [stdout]    |
[INFO] [stdout] 50 |     try!(socket.recv_from(&mut buffer));
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `reply`
[INFO] [stdout]   --> src/ping.rs:52:9
[INFO] [stdout]    |
[INFO] [stdout] 52 |     let reply = if dest.is_ipv4() {
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_reply`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.22s
[INFO] running `Command { std: "docker" "inspect" "95ff0ae0517bfa88a4983be6f8bd0ec118f143eaec1d9a6e9c729ea688fa74a7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "95ff0ae0517bfa88a4983be6f8bd0ec118f143eaec1d9a6e9c729ea688fa74a7", kill_on_drop: false }`
[INFO] [stdout] 95ff0ae0517bfa88a4983be6f8bd0ec118f143eaec1d9a6e9c729ea688fa74a7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+99e3aef02079e9c10583638520cd0c134dc3a01d" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 3369c784b9bbf743daf6754d0269f805f99fa3fdbcb788cfd2ad15247a22a196
[INFO] running `Command { std: "docker" "start" "-a" "3369c784b9bbf743daf6754d0269f805f99fa3fdbcb788cfd2ad15247a22a196", kill_on_drop: false }`
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/errors.rs:11:32
[INFO] [stderr]    |
[INFO] [stderr] 11 |     fn cause(&self) -> Option<&Fail> {
[INFO] [stderr]    |                                ^^^^ help: use `dyn`: `dyn Fail`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stderr]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/ping.rs:35:9
[INFO] [stderr]    |
[INFO] [stderr] 35 |         try!(Socket::new(Domain::ipv4(), Type::raw(), Some(Protocol::icmpv4())))
[INFO] [stderr]    |         ^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/ping.rs:40:9
[INFO] [stderr]    |
[INFO] [stderr] 40 |         try!(Socket::new(Domain::ipv6(), Type::raw(), Some(Protocol::icmpv6())))
[INFO] [stderr]    |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/ping.rs:45:5
[INFO] [stderr]    |
[INFO] [stderr] 45 |     try!(socket.send_to(&mut buffer, &dest.into()));
[INFO] [stderr]    |     ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/ping.rs:50:5
[INFO] [stderr]    |
[INFO] [stderr] 50 |     try!(socket.recv_from(&mut buffer));
[INFO] [stderr]    |     ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `reply`
[INFO] [stderr]   --> src/ping.rs:52:9
[INFO] [stderr]    |
[INFO] [stderr] 52 |     let reply = if dest.is_ipv4() {
[INFO] [stderr]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_reply`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 6 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/errors.rs:11:32
[INFO] [stderr]    |
[INFO] [stderr] 11 |     fn cause(&self) -> Option<&Fail> {
[INFO] [stderr]    |                                ^^^^ help: use `dyn`: `dyn Fail`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stderr]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/ping.rs:35:9
[INFO] [stderr]    |
[INFO] [stderr] 35 |         try!(Socket::new(Domain::ipv4(), Type::raw(), Some(Protocol::icmpv4())))
[INFO] [stderr]    |         ^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/ping.rs:40:9
[INFO] [stderr]    |
[INFO] [stderr] 40 |         try!(Socket::new(Domain::ipv6(), Type::raw(), Some(Protocol::icmpv6())))
[INFO] [stderr]    |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/ping.rs:45:5
[INFO] [stderr]    |
[INFO] [stderr] 45 |     try!(socket.send_to(&mut buffer, &dest.into()));
[INFO] [stderr]    |     ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/ping.rs:50:5
[INFO] [stderr]    |
[INFO] [stderr] 50 |     try!(socket.recv_from(&mut buffer));
[INFO] [stderr]    |     ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `reply`
[INFO] [stderr]   --> src/ping.rs:52:9
[INFO] [stderr]    |
[INFO] [stderr] 52 |     let reply = if dest.is_ipv4() {
[INFO] [stderr]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_reply`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 6 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/ping-61c243294fdb8ebe)
[INFO] [stderr]      Running tests/tests.rs (/opt/rustwide/target/debug/deps/tests-f30fe789ecaeb8db)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stderr]    Doc-tests ping
[INFO] [stdout] test basic ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "3369c784b9bbf743daf6754d0269f805f99fa3fdbcb788cfd2ad15247a22a196", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3369c784b9bbf743daf6754d0269f805f99fa3fdbcb788cfd2ad15247a22a196", kill_on_drop: false }`
[INFO] [stdout] 3369c784b9bbf743daf6754d0269f805f99fa3fdbcb788cfd2ad15247a22a196