[INFO] cloning repository https://github.com/NanXiao/chat
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/NanXiao/chat" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FNanXiao%2Fchat", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FNanXiao%2Fchat'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 0793be2b465e25865c9076fc32616a05d5340c9c
[INFO] testing NanXiao/chat against 1.49.0 for beta-1.50-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FNanXiao%2Fchat" "/workspace/builds/worker-0/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/NanXiao/chat on toolchain 1.49.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/NanXiao/chat
[INFO] finished tweaking git repo https://github.com/NanXiao/chat
[INFO] tweaked toml for git repo https://github.com/NanXiao/chat written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate git repo https://github.com/NanXiao/chat already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "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-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a035483901cef1cbd8559e871cfd34f6ca1dd53a3012592e4e4eef33d21191a2
[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" "a035483901cef1cbd8559e871cfd34f6ca1dd53a3012592e4e4eef33d21191a2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a035483901cef1cbd8559e871cfd34f6ca1dd53a3012592e4e4eef33d21191a2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a035483901cef1cbd8559e871cfd34f6ca1dd53a3012592e4e4eef33d21191a2", kill_on_drop: false }`
[INFO] [stdout] a035483901cef1cbd8559e871cfd34f6ca1dd53a3012592e4e4eef33d21191a2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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=warn" "-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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b6c3aaeecb3758f764b55a64249fda0bc6ab59312912bbe73ed4e0266f4bc874
[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" "b6c3aaeecb3758f764b55a64249fda0bc6ab59312912bbe73ed4e0266f4bc874", kill_on_drop: false }`
[INFO] [stderr]    Compiling chat v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary braces around function argument
[INFO] [stdout]    --> src/main.rs:106:19
[INFO] [stdout]     |
[INFO] [stdout] 106 |     thread::spawn({move || handle_send(send_stream)});
[INFO] [stdout]     |                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these braces
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_braces)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/main.rs:25:51
[INFO] [stdout]    |
[INFO] [stdout] 25 |                 println!("read_line error: {}", e.description());
[INFO] [stdout]    |                                                   ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/main.rs:34:51
[INFO] [stdout]    |
[INFO] [stdout] 34 |                 println!("write_all error: {}", e.description());
[INFO] [stdout]    |                                                   ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/main.rs:49:52
[INFO] [stdout]    |
[INFO] [stdout] 49 |                 println!("read_until error: {}", e.description());
[INFO] [stdout]    |                                                    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/main.rs:61:56
[INFO] [stdout]    |
[INFO] [stdout] 61 |                 println!("str::from_utf8 error: {}", e.description());
[INFO] [stdout]    |                                                        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/main.rs:83:68
[INFO] [stdout]    |
[INFO] [stdout] 83 | ...                   println!("str::from_utf8 error: {}", e.description());
[INFO] [stdout]    |                                                              ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/main.rs:89:56
[INFO] [stdout]    |
[INFO] [stdout] 89 |                     println!("read_until error: {}", e.description());
[INFO] [stdout]    |                                                        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/main.rs:98:51
[INFO] [stdout]    |
[INFO] [stdout] 98 |                 println!("write_all error: {}", e.description());
[INFO] [stdout]    |                                                   ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]    --> src/main.rs:127:61
[INFO] [stdout]     |
[INFO] [stdout] 127 |                 println!("Receive connection failed: {}", e.description());
[INFO] [stdout]     |                                                             ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]    --> src/main.rs:150:55
[INFO] [stdout]     |
[INFO] [stdout] 150 |             println!("Connect {} error: {}.", peer, e.description());
[INFO] [stdout]     |                                                       ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]    --> src/main.rs:170:53
[INFO] [stdout]     |
[INFO] [stdout] 170 |             println!("Bind {} error: {}.", local, e.description());
[INFO] [stdout]     |                                                     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]    --> src/main.rs:182:61
[INFO] [stdout]     |
[INFO] [stdout] 182 |                 println!("Receive connection failed: {}", e.description());
[INFO] [stdout]     |                                                             ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]    --> src/main.rs:192:61
[INFO] [stdout]     |
[INFO] [stdout] 192 |                         println!("Connection error: {}.", e.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 1.53s
[INFO] running `Command { std: "docker" "inspect" "b6c3aaeecb3758f764b55a64249fda0bc6ab59312912bbe73ed4e0266f4bc874", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b6c3aaeecb3758f764b55a64249fda0bc6ab59312912bbe73ed4e0266f4bc874", kill_on_drop: false }`
[INFO] [stdout] b6c3aaeecb3758f764b55a64249fda0bc6ab59312912bbe73ed4e0266f4bc874
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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=warn" "-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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 825a1e0ef93815a69910fcc9ce5a30898ef623bd76dab37a05e78b4dd2977591
[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" "825a1e0ef93815a69910fcc9ce5a30898ef623bd76dab37a05e78b4dd2977591", kill_on_drop: false }`
[INFO] [stderr]    Compiling chat v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary braces around function argument
[INFO] [stdout]    --> src/main.rs:106:19
[INFO] [stdout]     |
[INFO] [stdout] 106 |     thread::spawn({move || handle_send(send_stream)});
[INFO] [stdout]     |                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these braces
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_braces)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/main.rs:25:51
[INFO] [stdout]    |
[INFO] [stdout] 25 |                 println!("read_line error: {}", e.description());
[INFO] [stdout]    |                                                   ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/main.rs:34:51
[INFO] [stdout]    |
[INFO] [stdout] 34 |                 println!("write_all error: {}", e.description());
[INFO] [stdout]    |                                                   ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/main.rs:49:52
[INFO] [stdout]    |
[INFO] [stdout] 49 |                 println!("read_until error: {}", e.description());
[INFO] [stdout]    |                                                    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/main.rs:61:56
[INFO] [stdout]    |
[INFO] [stdout] 61 |                 println!("str::from_utf8 error: {}", e.description());
[INFO] [stdout]    |                                                        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/main.rs:83:68
[INFO] [stdout]    |
[INFO] [stdout] 83 | ...                   println!("str::from_utf8 error: {}", e.description());
[INFO] [stdout]    |                                                              ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/main.rs:89:56
[INFO] [stdout]    |
[INFO] [stdout] 89 |                     println!("read_until error: {}", e.description());
[INFO] [stdout]    |                                                        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/main.rs:98:51
[INFO] [stdout]    |
[INFO] [stdout] 98 |                 println!("write_all error: {}", e.description());
[INFO] [stdout]    |                                                   ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]    --> src/main.rs:127:61
[INFO] [stdout]     |
[INFO] [stdout] 127 |                 println!("Receive connection failed: {}", e.description());
[INFO] [stdout]     |                                                             ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]    --> src/main.rs:150:55
[INFO] [stdout]     |
[INFO] [stdout] 150 |             println!("Connect {} error: {}.", peer, e.description());
[INFO] [stdout]     |                                                       ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]    --> src/main.rs:170:53
[INFO] [stdout]     |
[INFO] [stdout] 170 |             println!("Bind {} error: {}.", local, e.description());
[INFO] [stdout]     |                                                     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]    --> src/main.rs:182:61
[INFO] [stdout]     |
[INFO] [stdout] 182 |                 println!("Receive connection failed: {}", e.description());
[INFO] [stdout]     |                                                             ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]    --> src/main.rs:192:61
[INFO] [stdout]     |
[INFO] [stdout] 192 |                         println!("Connection error: {}.", e.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 1.15s
[INFO] running `Command { std: "docker" "inspect" "825a1e0ef93815a69910fcc9ce5a30898ef623bd76dab37a05e78b4dd2977591", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "825a1e0ef93815a69910fcc9ce5a30898ef623bd76dab37a05e78b4dd2977591", kill_on_drop: false }`
[INFO] [stdout] 825a1e0ef93815a69910fcc9ce5a30898ef623bd76dab37a05e78b4dd2977591
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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=warn" "-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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] cd7159c55dd4445885e750bb59da0533d4f6787f67b7db8b60d4b8b9e630efeb
[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" "cd7159c55dd4445885e750bb59da0533d4f6787f67b7db8b60d4b8b9e630efeb", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stdout] 
[INFO] [stderr] warning: unnecessary braces around function argument
[INFO] [stdout] running 0 tests
[INFO] [stderr]    --> src/main.rs:106:19
[INFO] [stdout] 
[INFO] [stderr]     |
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stderr] 106 |     thread::spawn({move || handle_send(send_stream)});
[INFO] [stdout] 
[INFO] [stderr]     |                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these braces
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_braces)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stderr]   --> src/main.rs:25:51
[INFO] [stderr]    |
[INFO] [stderr] 25 |                 println!("read_line error: {}", e.description());
[INFO] [stderr]    |                                                   ^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stderr]   --> src/main.rs:34:51
[INFO] [stderr]    |
[INFO] [stderr] 34 |                 println!("write_all error: {}", e.description());
[INFO] [stderr]    |                                                   ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stderr]   --> src/main.rs:49:52
[INFO] [stderr]    |
[INFO] [stderr] 49 |                 println!("read_until error: {}", e.description());
[INFO] [stderr]    |                                                    ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stderr]   --> src/main.rs:61:56
[INFO] [stderr]    |
[INFO] [stderr] 61 |                 println!("str::from_utf8 error: {}", e.description());
[INFO] [stderr]    |                                                        ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stderr]   --> src/main.rs:83:68
[INFO] [stderr]    |
[INFO] [stderr] 83 | ...                   println!("str::from_utf8 error: {}", e.description());
[INFO] [stderr]    |                                                              ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stderr]   --> src/main.rs:89:56
[INFO] [stderr]    |
[INFO] [stderr] 89 |                     println!("read_until error: {}", e.description());
[INFO] [stderr]    |                                                        ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stderr]   --> src/main.rs:98:51
[INFO] [stderr]    |
[INFO] [stderr] 98 |                 println!("write_all error: {}", e.description());
[INFO] [stderr]    |                                                   ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stderr]    --> src/main.rs:127:61
[INFO] [stderr]     |
[INFO] [stderr] 127 |                 println!("Receive connection failed: {}", e.description());
[INFO] [stderr]     |                                                             ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stderr]    --> src/main.rs:150:55
[INFO] [stderr]     |
[INFO] [stderr] 150 |             println!("Connect {} error: {}.", peer, e.description());
[INFO] [stderr]     |                                                       ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stderr]    --> src/main.rs:170:53
[INFO] [stderr]     |
[INFO] [stderr] 170 |             println!("Bind {} error: {}.", local, e.description());
[INFO] [stderr]     |                                                     ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stderr]    --> src/main.rs:182:61
[INFO] [stderr]     |
[INFO] [stderr] 182 |                 println!("Receive connection failed: {}", e.description());
[INFO] [stderr]     |                                                             ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stderr]    --> src/main.rs:192:61
[INFO] [stderr]     |
[INFO] [stderr] 192 |                         println!("Connection error: {}.", e.description());
[INFO] [stderr]     |                                                             ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 13 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.72s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/chat-864bf0217f9b0d48
[INFO] running `Command { std: "docker" "inspect" "cd7159c55dd4445885e750bb59da0533d4f6787f67b7db8b60d4b8b9e630efeb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cd7159c55dd4445885e750bb59da0533d4f6787f67b7db8b60d4b8b9e630efeb", kill_on_drop: false }`
[INFO] [stdout] cd7159c55dd4445885e750bb59da0533d4f6787f67b7db8b60d4b8b9e630efeb