[INFO] cloning repository https://github.com/thara/rust-tcp-echo-server
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/thara/rust-tcp-echo-server" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fthara%2Frust-tcp-echo-server", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fthara%2Frust-tcp-echo-server'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] daf10149772fc8bde32334ae2327ee6db20c7a86
[INFO] testing thara/rust-tcp-echo-server against try#ce59db7a1b1b012fb2793c4641c1bdecad7a128b for pr-85530
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fthara%2Frust-tcp-echo-server" "/workspace/builds/worker-11/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-11/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/thara/rust-tcp-echo-server on toolchain ce59db7a1b1b012fb2793c4641c1bdecad7a128b
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ce59db7a1b1b012fb2793c4641c1bdecad7a128b" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/thara/rust-tcp-echo-server
[INFO] finished tweaking git repo https://github.com/thara/rust-tcp-echo-server
[INFO] tweaked toml for git repo https://github.com/thara/rust-tcp-echo-server written to /workspace/builds/worker-11/source/Cargo.toml
[INFO] crate git repo https://github.com/thara/rust-tcp-echo-server already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ce59db7a1b1b012fb2793c4641c1bdecad7a128b" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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" "+ce59db7a1b1b012fb2793c4641c1bdecad7a128b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8fad1e56bf2c5307f86810feeeafe2b14a920f7f67bba5dfdf54bf1444db716a
[INFO] running `Command { std: "docker" "start" "-a" "8fad1e56bf2c5307f86810feeeafe2b14a920f7f67bba5dfdf54bf1444db716a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8fad1e56bf2c5307f86810feeeafe2b14a920f7f67bba5dfdf54bf1444db716a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8fad1e56bf2c5307f86810feeeafe2b14a920f7f67bba5dfdf54bf1444db716a", kill_on_drop: false }`
[INFO] [stdout] 8fad1e56bf2c5307f86810feeeafe2b14a920f7f67bba5dfdf54bf1444db716a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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" "+ce59db7a1b1b012fb2793c4641c1bdecad7a128b" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] da2d91913b511c5329f559d14f8168f1244899afb485a82429136f329bb264d5
[INFO] running `Command { std: "docker" "start" "-a" "da2d91913b511c5329f559d14f8168f1244899afb485a82429136f329bb264d5", kill_on_drop: false }`
[INFO] [stderr]    Compiling void v1.0.2
[INFO] [stderr]    Compiling libc v0.2.30
[INFO] [stderr]    Compiling bitflags v0.9.1
[INFO] [stderr]    Compiling cfg-if v0.1.2
[INFO] [stderr]    Compiling nix v0.9.0
[INFO] [stderr]    Compiling tcp-echo-server v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/server.rs:11:20
[INFO] [stdout]    |
[INFO] [stdout] 11 |     let listener = try!(TcpListener::bind(addr));
[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/server.rs:15:26
[INFO] [stdout]    |
[INFO] [stdout] 15 |         let mut stream = try!(stream);
[INFO] [stdout]    |                          ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/server.rs:16:37
[INFO] [stdout]    |
[INFO] [stdout] 16 |         println!("{:?} connected.", try!(stream.peer_addr()));
[INFO] [stdout]    |                                     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/server.rs:20:17
[INFO] [stdout]    |
[INFO] [stdout] 20 |         let n = try!(stream.read(&mut bf));
[INFO] [stdout]    |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/server.rs:22:38
[INFO] [stdout]    |
[INFO] [stdout] 22 |             println!("{:?} closed.", try!(stream.peer_addr()));
[INFO] [stdout]    |                                      ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/server.rs:31:13
[INFO] [stdout]    |
[INFO] [stdout] 31 |             try!(stream.write(&bf[0..n]));
[INFO] [stdout]    |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/client.rs:11:22
[INFO] [stdout]    |
[INFO] [stdout] 11 |     let mut stream = try!(TcpStream::connect(addr));
[INFO] [stdout]    |                      ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/client.rs:15:13
[INFO] [stdout]    |
[INFO] [stdout] 15 |     let s = try!(stream.write(msg.as_bytes()));
[INFO] [stdout]    |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/client.rs:16:41
[INFO] [stdout]    |
[INFO] [stdout] 16 |     println!("Write {} bytes to {}", s, try!(stream.peer_addr()));
[INFO] [stdout]    |                                         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/client.rs:19:13
[INFO] [stdout]    |
[INFO] [stdout] 19 |     let n = try!(stream.read(&mut bf));
[INFO] [stdout]    |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/client.rs:21:34
[INFO] [stdout]    |
[INFO] [stdout] 21 |         println!("{:?} closed.", try!(stream.peer_addr()));
[INFO] [stdout]    |                                  ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/client.rs:23:48
[INFO] [stdout]    |
[INFO] [stdout] 23 |         println!("Read {} bytes from {:?}", s, try!(stream.peer_addr()));
[INFO] [stdout]    |                                                ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 12 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.93s
[INFO] running `Command { std: "docker" "inspect" "da2d91913b511c5329f559d14f8168f1244899afb485a82429136f329bb264d5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "da2d91913b511c5329f559d14f8168f1244899afb485a82429136f329bb264d5", kill_on_drop: false }`
[INFO] [stdout] da2d91913b511c5329f559d14f8168f1244899afb485a82429136f329bb264d5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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" "+ce59db7a1b1b012fb2793c4641c1bdecad7a128b" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 49466c19f474df1e679b0ba5a5a0f42609da6cf69105d5d09287b5e538c1575a
[INFO] running `Command { std: "docker" "start" "-a" "49466c19f474df1e679b0ba5a5a0f42609da6cf69105d5d09287b5e538c1575a", kill_on_drop: false }`
[INFO] [stderr]    Compiling tcp-echo-server v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/server.rs:11:20
[INFO] [stdout]    |
[INFO] [stdout] 11 |     let listener = try!(TcpListener::bind(addr));
[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/server.rs:15:26
[INFO] [stdout]    |
[INFO] [stdout] 15 |         let mut stream = try!(stream);
[INFO] [stdout]    |                          ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/server.rs:16:37
[INFO] [stdout]    |
[INFO] [stdout] 16 |         println!("{:?} connected.", try!(stream.peer_addr()));
[INFO] [stdout]    |                                     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/server.rs:20:17
[INFO] [stdout]    |
[INFO] [stdout] 20 |         let n = try!(stream.read(&mut bf));
[INFO] [stdout]    |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/server.rs:22:38
[INFO] [stdout]    |
[INFO] [stdout] 22 |             println!("{:?} closed.", try!(stream.peer_addr()));
[INFO] [stdout]    |                                      ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/server.rs:31:13
[INFO] [stdout]    |
[INFO] [stdout] 31 |             try!(stream.write(&bf[0..n]));
[INFO] [stdout]    |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/client.rs:11:22
[INFO] [stdout]    |
[INFO] [stdout] 11 |     let mut stream = try!(TcpStream::connect(addr));
[INFO] [stdout]    |                      ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/client.rs:15:13
[INFO] [stdout]    |
[INFO] [stdout] 15 |     let s = try!(stream.write(msg.as_bytes()));
[INFO] [stdout]    |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/client.rs:16:41
[INFO] [stdout]    |
[INFO] [stdout] 16 |     println!("Write {} bytes to {}", s, try!(stream.peer_addr()));
[INFO] [stdout]    |                                         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/client.rs:19:13
[INFO] [stdout]    |
[INFO] [stdout] 19 |     let n = try!(stream.read(&mut bf));
[INFO] [stdout]    |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/client.rs:21:34
[INFO] [stdout]    |
[INFO] [stdout] 21 |         println!("{:?} closed.", try!(stream.peer_addr()));
[INFO] [stdout]    |                                  ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/client.rs:23:48
[INFO] [stdout]    |
[INFO] [stdout] 23 |         println!("Read {} bytes from {:?}", s, try!(stream.peer_addr()));
[INFO] [stdout]    |                                                ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 12 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.38s
[INFO] running `Command { std: "docker" "inspect" "49466c19f474df1e679b0ba5a5a0f42609da6cf69105d5d09287b5e538c1575a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "49466c19f474df1e679b0ba5a5a0f42609da6cf69105d5d09287b5e538c1575a", kill_on_drop: false }`
[INFO] [stdout] 49466c19f474df1e679b0ba5a5a0f42609da6cf69105d5d09287b5e538c1575a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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" "+ce59db7a1b1b012fb2793c4641c1bdecad7a128b" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 0d4f765d02105890f134812dcddd451263f392a37a439a8d21a9c7e032ea2fc3
[INFO] running `Command { std: "docker" "start" "-a" "0d4f765d02105890f134812dcddd451263f392a37a439a8d21a9c7e032ea2fc3", kill_on_drop: false }`
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/server.rs:11:20
[INFO] [stderr]    |
[INFO] [stderr] 11 |     let listener = try!(TcpListener::bind(addr));
[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/server.rs:15:26
[INFO] [stderr]    |
[INFO] [stderr] 15 |         let mut stream = try!(stream);
[INFO] [stderr]    |                          ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/server.rs:16:37
[INFO] [stderr]    |
[INFO] [stderr] 16 |         println!("{:?} connected.", try!(stream.peer_addr()));
[INFO] [stderr]    |                                     ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/server.rs:20:17
[INFO] [stderr]    |
[INFO] [stderr] 20 |         let n = try!(stream.read(&mut bf));
[INFO] [stderr]    |                 ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/server.rs:22:38
[INFO] [stderr]    |
[INFO] [stderr] 22 |             println!("{:?} closed.", try!(stream.peer_addr()));
[INFO] [stderr]    |                                      ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/server.rs:31:13
[INFO] [stderr]    |
[INFO] [stderr] 31 |             try!(stream.write(&bf[0..n]));
[INFO] [stderr]    |             ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/client.rs:11:22
[INFO] [stderr]    |
[INFO] [stderr] 11 |     let mut stream = try!(TcpStream::connect(addr));
[INFO] [stderr]    |                      ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/client.rs:15:13
[INFO] [stderr]    |
[INFO] [stderr] 15 |     let s = try!(stream.write(msg.as_bytes()));
[INFO] [stderr]    |             ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/client.rs:16:41
[INFO] [stderr]    |
[INFO] [stderr] 16 |     println!("Write {} bytes to {}", s, try!(stream.peer_addr()));
[INFO] [stderr]    |                                         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/client.rs:19:13
[INFO] [stderr]    |
[INFO] [stderr] 19 |     let n = try!(stream.read(&mut bf));
[INFO] [stderr]    |             ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/client.rs:21:34
[INFO] [stderr]    |
[INFO] [stderr] 21 |         println!("{:?} closed.", try!(stream.peer_addr()));
[INFO] [stderr]    |                                  ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/client.rs:23:48
[INFO] [stderr]    |
[INFO] [stderr] 23 |         println!("Read {} bytes from {:?}", s, try!(stream.peer_addr()));
[INFO] [stderr]    |                                                ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 12 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/tcp_echo_server-e71b0d67d9501975)
[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" "0d4f765d02105890f134812dcddd451263f392a37a439a8d21a9c7e032ea2fc3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0d4f765d02105890f134812dcddd451263f392a37a439a8d21a9c7e032ea2fc3", kill_on_drop: false }`
[INFO] [stdout] 0d4f765d02105890f134812dcddd451263f392a37a439a8d21a9c7e032ea2fc3