[INFO] updating cached repository https://github.com/antage/netcat
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune", kill_on_drop: false }`
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 17229a5c79e074b37a3836deb24e24b178f091b0
[INFO] testing antage/netcat against try#03a1ea71b075ab964b5278bc6e74cd6c52c36ee0 for pr-74409
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fantage%2Fnetcat" "/workspace/builds/worker-3/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/antage/netcat on toolchain 03a1ea71b075ab964b5278bc6e74cd6c52c36ee0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+03a1ea71b075ab964b5278bc6e74cd6c52c36ee0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/antage/netcat
[INFO] finished tweaking git repo https://github.com/antage/netcat
[INFO] tweaked toml for git repo https://github.com/antage/netcat written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate git repo https://github.com/antage/netcat already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+03a1ea71b075ab964b5278bc6e74cd6c52c36ee0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] error: the lock file /workspace/builds/worker-3/source/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] [stderr] If you want to try to generate the lock file without accessing the network, use the --offline flag.
[INFO] the lockfile is outdated, regenerating it
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+03a1ea71b075ab964b5278bc6e74cd6c52c36ee0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+03a1ea71b075ab964b5278bc6e74cd6c52c36ee0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:d9fbb4e2287ab3795bdefaf705efb7541a8875c13bce71e067d6b01dc5ed759b" "/opt/rustwide/cargo-home/bin/cargo" "+03a1ea71b075ab964b5278bc6e74cd6c52c36ee0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] fbda887f3c091beb3f06e2f6c9945fab7968c2be5bc8dfeacb8b3f882c01f8b2
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "fbda887f3c091beb3f06e2f6c9945fab7968c2be5bc8dfeacb8b3f882c01f8b2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fbda887f3c091beb3f06e2f6c9945fab7968c2be5bc8dfeacb8b3f882c01f8b2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fbda887f3c091beb3f06e2f6c9945fab7968c2be5bc8dfeacb8b3f882c01f8b2", kill_on_drop: false }`
[INFO] [stdout] fbda887f3c091beb3f06e2f6c9945fab7968c2be5bc8dfeacb8b3f882c01f8b2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:d9fbb4e2287ab3795bdefaf705efb7541a8875c13bce71e067d6b01dc5ed759b" "/opt/rustwide/cargo-home/bin/cargo" "+03a1ea71b075ab964b5278bc6e74cd6c52c36ee0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c82708f8a88b9b14bba115866b9d7bbb1cc7e5bdb81130a18c6dd899011eca43
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "c82708f8a88b9b14bba115866b9d7bbb1cc7e5bdb81130a18c6dd899011eca43", kill_on_drop: false }`
[INFO] [stderr]    Compiling getopts v0.2.21
[INFO] [stderr]    Compiling netcat v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]   --> src/netcat/mod.rs:22:17
[INFO] [stdout]    |
[INFO] [stdout] 22 |     let listener = try!(std::net::TcpListener::bind(("0.0.0.0", port)));
[INFO] [stdout]    |                    ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]   --> src/netcat/mod.rs:23:24
[INFO] [stdout]    |
[INFO] [stdout] 23 |     let (mut stream, _) = try!(listener.accept());
[INFO] [stdout]    |                           ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]   --> src/netcat/mod.rs:24:2
[INFO] [stdout]    |
[INFO] [stdout] 24 |     try!(std::io::copy(&mut stream, &mut std::io::stdout()));
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]   --> src/netcat/mod.rs:29:19
[INFO] [stdout]    |
[INFO] [stdout] 29 |     let mut stream = try!(std::net::TcpStream::connect((hostname, port)));
[INFO] [stdout]    |                      ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]   --> src/netcat/mod.rs:30:2
[INFO] [stdout]    |
[INFO] [stdout] 30 |     try!(std::io::copy(&mut std::io::stdin(), &mut stream));
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]   --> src/netcat/mod.rs:42:16
[INFO] [stdout]    |
[INFO] [stdout] 42 |     let matches = try!(opts.parse(&args[1..]));
[INFO] [stdout]    |                   ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]   --> src/netcat/mod.rs:49:4
[INFO] [stdout]    |
[INFO] [stdout] 49 |             try!(
[INFO] [stdout]    |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]   --> src/netcat/mod.rs:50:5
[INFO] [stdout]    |
[INFO] [stdout] 50 |                 try!(
[INFO] [stdout]    |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]   --> src/netcat/mod.rs:66:20
[INFO] [stdout]    |
[INFO] [stdout] 66 |             let port: u16 = try!(matches.free[1].parse());
[INFO] [stdout]    |                             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/netcat/error.rs:39:29
[INFO] [stdout]    |
[INFO] [stdout] 39 |     fn cause(&self) -> Option<&std::error::Error> {
[INFO] [stdout]    |                                ^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn std::error::Error`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'std::error::Error::description': use the Display impl or to_string()
[INFO] [stdout]   --> src/netcat/error.rs:34:33
[INFO] [stdout]    |
[INFO] [stdout] 34 |             Error::PortParse(ref err) => std::error::Error::description(err),
[INFO] [stdout]    |                                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'std::error::Error::description': use the Display impl or to_string()
[INFO] [stdout]   --> src/netcat/error.rs:31:39
[INFO] [stdout]    |
[INFO] [stdout] 31 |             Error::GetoptsFail(ref err) => err.description(),
[INFO] [stdout]    |                                                ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'std::error::Error::description': use the Display impl or to_string()
[INFO] [stdout]   --> src/netcat/error.rs:35:30
[INFO] [stdout]    |
[INFO] [stdout] 35 |             Error::IO(ref err) => err.description()
[INFO] [stdout]    |                                       ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 13 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.56s
[INFO] running `Command { std: "docker" "inspect" "c82708f8a88b9b14bba115866b9d7bbb1cc7e5bdb81130a18c6dd899011eca43", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c82708f8a88b9b14bba115866b9d7bbb1cc7e5bdb81130a18c6dd899011eca43", kill_on_drop: false }`
[INFO] [stdout] c82708f8a88b9b14bba115866b9d7bbb1cc7e5bdb81130a18c6dd899011eca43
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:d9fbb4e2287ab3795bdefaf705efb7541a8875c13bce71e067d6b01dc5ed759b" "/opt/rustwide/cargo-home/bin/cargo" "+03a1ea71b075ab964b5278bc6e74cd6c52c36ee0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4172690b3f54ab93189fd11d4aa7cd968516a88aaff2cfde0e75af7da9861c66
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "4172690b3f54ab93189fd11d4aa7cd968516a88aaff2cfde0e75af7da9861c66", kill_on_drop: false }`
[INFO] [stderr]    Compiling netcat v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]   --> src/netcat/mod.rs:22:17
[INFO] [stdout]    |
[INFO] [stdout] 22 |     let listener = try!(std::net::TcpListener::bind(("0.0.0.0", port)));
[INFO] [stdout]    |                    ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]   --> src/netcat/mod.rs:23:24
[INFO] [stdout]    |
[INFO] [stdout] 23 |     let (mut stream, _) = try!(listener.accept());
[INFO] [stdout]    |                           ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]   --> src/netcat/mod.rs:24:2
[INFO] [stdout]    |
[INFO] [stdout] 24 |     try!(std::io::copy(&mut stream, &mut std::io::stdout()));
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]   --> src/netcat/mod.rs:29:19
[INFO] [stdout]    |
[INFO] [stdout] 29 |     let mut stream = try!(std::net::TcpStream::connect((hostname, port)));
[INFO] [stdout]    |                      ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]   --> src/netcat/mod.rs:30:2
[INFO] [stdout]    |
[INFO] [stdout] 30 |     try!(std::io::copy(&mut std::io::stdin(), &mut stream));
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]   --> src/netcat/mod.rs:42:16
[INFO] [stdout]    |
[INFO] [stdout] 42 |     let matches = try!(opts.parse(&args[1..]));
[INFO] [stdout]    |                   ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]   --> src/netcat/mod.rs:49:4
[INFO] [stdout]    |
[INFO] [stdout] 49 |             try!(
[INFO] [stdout]    |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]   --> src/netcat/mod.rs:50:5
[INFO] [stdout]    |
[INFO] [stdout] 50 |                 try!(
[INFO] [stdout]    |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]   --> src/netcat/mod.rs:66:20
[INFO] [stdout]    |
[INFO] [stdout] 66 |             let port: u16 = try!(matches.free[1].parse());
[INFO] [stdout]    |                             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/netcat/error.rs:39:29
[INFO] [stdout]    |
[INFO] [stdout] 39 |     fn cause(&self) -> Option<&std::error::Error> {
[INFO] [stdout]    |                                ^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn std::error::Error`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'std::error::Error::description': use the Display impl or to_string()
[INFO] [stdout]   --> src/netcat/error.rs:34:33
[INFO] [stdout]    |
[INFO] [stdout] 34 |             Error::PortParse(ref err) => std::error::Error::description(err),
[INFO] [stdout]    |                                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'std::error::Error::description': use the Display impl or to_string()
[INFO] [stdout]   --> src/netcat/error.rs:31:39
[INFO] [stdout]    |
[INFO] [stdout] 31 |             Error::GetoptsFail(ref err) => err.description(),
[INFO] [stdout]    |                                                ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'std::error::Error::description': use the Display impl or to_string()
[INFO] [stdout]   --> src/netcat/error.rs:35:30
[INFO] [stdout]    |
[INFO] [stdout] 35 |             Error::IO(ref err) => err.description()
[INFO] [stdout]    |                                       ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 13 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.70s
[INFO] running `Command { std: "docker" "inspect" "4172690b3f54ab93189fd11d4aa7cd968516a88aaff2cfde0e75af7da9861c66", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4172690b3f54ab93189fd11d4aa7cd968516a88aaff2cfde0e75af7da9861c66", kill_on_drop: false }`
[INFO] [stdout] 4172690b3f54ab93189fd11d4aa7cd968516a88aaff2cfde0e75af7da9861c66
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:d9fbb4e2287ab3795bdefaf705efb7541a8875c13bce71e067d6b01dc5ed759b" "/opt/rustwide/cargo-home/bin/cargo" "+03a1ea71b075ab964b5278bc6e74cd6c52c36ee0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 992ce00c899e3c1c084b1a45acbe748005864dba5a5c2bcb06af4195947ca917
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "992ce00c899e3c1c084b1a45acbe748005864dba5a5c2bcb06af4195947ca917", kill_on_drop: false }`
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/netcat/mod.rs:22:17
[INFO] [stderr]    |
[INFO] [stderr] 22 |     let listener = try!(std::net::TcpListener::bind(("0.0.0.0", port)));
[INFO] [stderr]    |                    ^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/netcat/mod.rs:23:24
[INFO] [stderr]    |
[INFO] [stderr] 23 |     let (mut stream, _) = try!(listener.accept());
[INFO] [stderr]    |                           ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/netcat/mod.rs:24:2
[INFO] [stderr]    |
[INFO] [stderr] 24 |     try!(std::io::copy(&mut stream, &mut std::io::stdout()));
[INFO] [stderr]    |     ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/netcat/mod.rs:29:19
[INFO] [stderr]    |
[INFO] [stderr] 29 |     let mut stream = try!(std::net::TcpStream::connect((hostname, port)));
[INFO] [stderr]    |                      ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/netcat/mod.rs:30:2
[INFO] [stderr]    |
[INFO] [stderr] 30 |     try!(std::io::copy(&mut std::io::stdin(), &mut stream));
[INFO] [stderr]    |     ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/netcat/mod.rs:42:16
[INFO] [stderr]    |
[INFO] [stderr] 42 |     let matches = try!(opts.parse(&args[1..]));
[INFO] [stderr]    |                   ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/netcat/mod.rs:49:4
[INFO] [stderr]    |
[INFO] [stderr] 49 |             try!(
[INFO] [stderr]    |             ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/netcat/mod.rs:50:5
[INFO] [stderr]    |
[INFO] [stderr] 50 |                 try!(
[INFO] [stderr]    |                 ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/netcat/mod.rs:66:20
[INFO] [stderr]    |
[INFO] [stderr] 66 |             let port: u16 = try!(matches.free[1].parse());
[INFO] [stderr]    |                             ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/netcat/error.rs:39:29
[INFO] [stderr]    |
[INFO] [stderr] 39 |     fn cause(&self) -> Option<&std::error::Error> {
[INFO] [stderr]    |                                ^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn std::error::Error`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::error::Error::description': use the Display impl or to_string()
[INFO] [stderr]   --> src/netcat/error.rs:34:33
[INFO] [stderr]    |
[INFO] [stderr] 34 |             Error::PortParse(ref err) => std::error::Error::description(err),
[INFO] [stderr]    |                                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::error::Error::description': use the Display impl or to_string()
[INFO] [stderr]   --> src/netcat/error.rs:31:39
[INFO] [stderr]    |
[INFO] [stderr] 31 |             Error::GetoptsFail(ref err) => err.description(),
[INFO] [stderr]    |                                                ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::error::Error::description': use the Display impl or to_string()
[INFO] [stderr]   --> src/netcat/error.rs:35:30
[INFO] [stderr]    |
[INFO] [stderr] 35 |             Error::IO(ref err) => err.description()
[INFO] [stderr]    |                                       ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 13 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.05s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/netcat-b2804c217b070694
[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
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "992ce00c899e3c1c084b1a45acbe748005864dba5a5c2bcb06af4195947ca917", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "992ce00c899e3c1c084b1a45acbe748005864dba5a5c2bcb06af4195947ca917", kill_on_drop: false }`
[INFO] [stdout] 992ce00c899e3c1c084b1a45acbe748005864dba5a5c2bcb06af4195947ca917