[INFO] cloning repository https://github.com/Interfiber/rapd
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Interfiber/rapd" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FInterfiber%2Frapd", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FInterfiber%2Frapd'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 9d2306f3b77faec6174b3b8fdbf642f4ca2ec59c
[INFO] testing Interfiber/rapd against beta-2022-02-22 for beta-1.60-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FInterfiber%2Frapd" "/workspace/builds/worker-5/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Interfiber/rapd on toolchain beta-2022-02-22
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-02-22" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Interfiber/rapd
[INFO] finished tweaking git repo https://github.com/Interfiber/rapd
[INFO] tweaked toml for git repo https://github.com/Interfiber/rapd written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] crate git repo https://github.com/Interfiber/rapd already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-02-22" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 60bf23dd6dbce48afffd350dd722e5a963c617477b455a7ebe28bbce08108606
[INFO] running `Command { std: "docker" "start" "-a" "60bf23dd6dbce48afffd350dd722e5a963c617477b455a7ebe28bbce08108606", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "60bf23dd6dbce48afffd350dd722e5a963c617477b455a7ebe28bbce08108606", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "60bf23dd6dbce48afffd350dd722e5a963c617477b455a7ebe28bbce08108606", kill_on_drop: false }`
[INFO] [stdout] 60bf23dd6dbce48afffd350dd722e5a963c617477b455a7ebe28bbce08108606
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 39b1018227f5a12f9346c38a815fe462df66acc6b9dfb544a18d0cfc9fc2cbc1
[INFO] running `Command { std: "docker" "start" "-a" "39b1018227f5a12f9346c38a815fe462df66acc6b9dfb544a18d0cfc9fc2cbc1", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.117
[INFO] [stderr]    Compiling syn v1.0.86
[INFO] [stderr]    Compiling cpal v0.13.5
[INFO] [stderr]    Compiling regex-syntax v0.6.25
[INFO] [stderr]    Compiling hound v3.4.0
[INFO] [stderr]    Compiling claxon v0.4.3
[INFO] [stderr]    Compiling text_io v0.1.9
[INFO] [stderr]    Compiling home v0.5.3
[INFO] [stderr]    Compiling alsa-sys v0.3.1
[INFO] [stderr]    Compiling indexmap v1.8.0
[INFO] [stderr]    Compiling ogg v0.8.0
[INFO] [stderr]    Compiling os_str_bytes v6.0.0
[INFO] [stderr]    Compiling lewton v0.10.2
[INFO] [stderr]    Compiling regex v1.5.4
[INFO] [stderr]    Compiling jobserver v0.1.24
[INFO] [stderr]    Compiling nix v0.23.1
[INFO] [stderr]    Compiling parking_lot_core v0.8.5
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling slice-deque v0.3.0
[INFO] [stderr]    Compiling dirs-sys v0.3.6
[INFO] [stderr]    Compiling clap v3.0.14
[INFO] [stderr]    Compiling parking_lot v0.11.2
[INFO] [stderr]    Compiling cc v1.0.72
[INFO] [stderr]    Compiling dirs v3.0.2
[INFO] [stderr]    Compiling xdg v2.4.0
[INFO] [stderr]    Compiling env_logger v0.9.0
[INFO] [stderr]    Compiling minimp3-sys v0.3.2
[INFO] [stderr]    Compiling alsa v0.6.0
[INFO] [stderr]    Compiling ctrlc v3.2.1
[INFO] [stderr]    Compiling serde_derive v1.0.136
[INFO] [stderr]    Compiling thiserror-impl v1.0.30
[INFO] [stderr]    Compiling thiserror v1.0.30
[INFO] [stderr]    Compiling minimp3 v0.5.1
[INFO] [stderr]    Compiling rodio v0.15.0
[INFO] [stderr]    Compiling serde v1.0.136
[INFO] [stderr]    Compiling serde_json v1.0.78
[INFO] [stderr]    Compiling toml v0.5.8
[INFO] [stderr]    Compiling rapc v0.1.0 (/opt/rustwide/workdir/rapc)
[INFO] [stderr]    Compiling rapd v0.1.3 (/opt/rustwide/workdir/rapd)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 22.00s
[INFO] running `Command { std: "docker" "inspect" "39b1018227f5a12f9346c38a815fe462df66acc6b9dfb544a18d0cfc9fc2cbc1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "39b1018227f5a12f9346c38a815fe462df66acc6b9dfb544a18d0cfc9fc2cbc1", kill_on_drop: false }`
[INFO] [stdout] 39b1018227f5a12f9346c38a815fe462df66acc6b9dfb544a18d0cfc9fc2cbc1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6910335ce47f517e9a82dcb67be4e459ba46269378729e8252380ecfe66ad652
[INFO] running `Command { std: "docker" "start" "-a" "6910335ce47f517e9a82dcb67be4e459ba46269378729e8252380ecfe66ad652", kill_on_drop: false }`
[INFO] [stderr]    Compiling rapc v0.1.0 (/opt/rustwide/workdir/rapc)
[INFO] [stderr]    Compiling rapd v0.1.3 (/opt/rustwide/workdir/rapd)
[INFO] [stdout] warning: unused variable: `len`
[INFO] [stdout]  --> rapd/examples/rebuild_music_database.rs:8:9
[INFO] [stdout]   |
[INFO] [stdout] 8 |     let len = stream.write(b"{\"request_type\":\"rebuild_music_db\"}\n");
[INFO] [stdout]   |         ^^^ help: if this is intentional, prefix it with an underscore: `_len`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `len`
[INFO] [stdout]   --> rapd/examples/rebuild_music_database.rs:11:9
[INFO] [stdout]    |
[INFO] [stdout] 11 |     let len = reader.read_line(&mut line);
[INFO] [stdout]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_len`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `len`
[INFO] [stdout]  --> rapd/examples/stop_player.rs:8:9
[INFO] [stdout]   |
[INFO] [stdout] 8 |     let len = stream.write(b"{\"request_type\":\"stop_player\" }\n");
[INFO] [stdout]   |         ^^^ help: if this is intentional, prefix it with an underscore: `_len`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `len`
[INFO] [stdout]   --> rapd/examples/stop_player.rs:11:9
[INFO] [stdout]    |
[INFO] [stdout] 11 |     let len = reader.read_line(&mut line);
[INFO] [stdout]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_len`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `len`
[INFO] [stdout]  --> rapd/examples/get_playing.rs:8:9
[INFO] [stdout]   |
[INFO] [stdout] 8 |     let len = stream.write(b"{\"request_type\":\"current_file\", \"full_path\": false}\n");
[INFO] [stdout]   |         ^^^ help: if this is intentional, prefix it with an underscore: `_len`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `len`
[INFO] [stdout]  --> rapd/examples/shutdown.rs:8:9
[INFO] [stdout]   |
[INFO] [stdout] 8 |     let len = stream.write(b"{\"request_type\":\"server_shutdown\"}\n");
[INFO] [stdout]   |         ^^^ help: if this is intentional, prefix it with an underscore: `_len`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `len`
[INFO] [stdout]   --> rapd/examples/get_playing.rs:11:9
[INFO] [stdout]    |
[INFO] [stdout] 11 |     let len = reader.read_line(&mut line);
[INFO] [stdout]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_len`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `len`
[INFO] [stdout]   --> rapd/examples/shutdown.rs:11:9
[INFO] [stdout]    |
[INFO] [stdout] 11 |     let len = reader.read_line(&mut line);
[INFO] [stdout]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_len`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `len`
[INFO] [stdout]  --> rapd/examples/play_audio_file.rs:8:9
[INFO] [stdout]   |
[INFO] [stdout] 8 |     let len = stream.write(b"{\"request_type\":\"play_audio_file\",\"audio_file_path\":\"test.ogg\", \"loop_audio\": true}\n");
[INFO] [stdout]   |         ^^^ help: if this is intentional, prefix it with an underscore: `_len`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `len`
[INFO] [stdout]   --> rapd/examples/play_audio_file.rs:11:9
[INFO] [stdout]    |
[INFO] [stdout] 11 |     let len = reader.read_line(&mut line);
[INFO] [stdout]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_len`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `len`
[INFO] [stdout]  --> rapd/examples/get_music.rs:8:9
[INFO] [stdout]   |
[INFO] [stdout] 8 |     let len = stream.write(b"{\"request_type\":\"get_music\"}\n");
[INFO] [stdout]   |         ^^^ help: if this is intentional, prefix it with an underscore: `_len`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `len`
[INFO] [stdout]   --> rapd/examples/get_music.rs:11:9
[INFO] [stdout]    |
[INFO] [stdout] 11 |     let len = reader.read_line(&mut line);
[INFO] [stdout]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_len`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.55s
[INFO] running `Command { std: "docker" "inspect" "6910335ce47f517e9a82dcb67be4e459ba46269378729e8252380ecfe66ad652", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6910335ce47f517e9a82dcb67be4e459ba46269378729e8252380ecfe66ad652", kill_on_drop: false }`
[INFO] [stdout] 6910335ce47f517e9a82dcb67be4e459ba46269378729e8252380ecfe66ad652
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 946bbd681a1f0933cee988e9564e90994af1057c1cb4f411cca13f0041009ec4
[INFO] running `Command { std: "docker" "start" "-a" "946bbd681a1f0933cee988e9564e90994af1057c1cb4f411cca13f0041009ec4", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stdout] 
[INFO] [stderr] warning: unused variable: `len`
[INFO] [stdout] running 0 tests
[INFO] [stderr]  --> rapd/examples/play_audio_file.rs:8:9
[INFO] [stdout] 
[INFO] [stderr]   |
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stderr] 8 |     let len = stream.write(b"{\"request_type\":\"play_audio_file\",\"audio_file_path\":\"test.ogg\", \"loop_audio\": true}\n");
[INFO] [stdout] 
[INFO] [stderr]   |         ^^^ help: if this is intentional, prefix it with an underscore: `_len`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `len`
[INFO] [stderr]   --> rapd/examples/play_audio_file.rs:11:9
[INFO] [stderr]    |
[INFO] [stderr] 11 |     let len = reader.read_line(&mut line);
[INFO] [stderr]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_len`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `len`
[INFO] [stderr]  --> rapd/examples/get_music.rs:8:9
[INFO] [stderr]   |
[INFO] [stderr] 8 |     let len = stream.write(b"{\"request_type\":\"get_music\"}\n");
[INFO] [stderr]   |         ^^^ help: if this is intentional, prefix it with an underscore: `_len`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `len`
[INFO] [stderr]   --> rapd/examples/get_music.rs:11:9
[INFO] [stderr]    |
[INFO] [stderr] 11 |     let len = reader.read_line(&mut line);
[INFO] [stderr]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_len`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `len`
[INFO] [stderr]  --> rapd/examples/get_playing.rs:8:9
[INFO] [stderr]   |
[INFO] [stderr] 8 |     let len = stream.write(b"{\"request_type\":\"current_file\", \"full_path\": false}\n");
[INFO] [stderr]   |         ^^^ help: if this is intentional, prefix it with an underscore: `_len`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `len`
[INFO] [stderr]   --> rapd/examples/get_playing.rs:11:9
[INFO] [stderr]    |
[INFO] [stderr] 11 |     let len = reader.read_line(&mut line);
[INFO] [stderr]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_len`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `len`
[INFO] [stderr]  --> rapd/examples/stop_player.rs:8:9
[INFO] [stderr]   |
[INFO] [stderr] 8 |     let len = stream.write(b"{\"request_type\":\"stop_player\" }\n");
[INFO] [stderr]   |         ^^^ help: if this is intentional, prefix it with an underscore: `_len`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `len`
[INFO] [stderr]   --> rapd/examples/stop_player.rs:11:9
[INFO] [stderr]    |
[INFO] [stderr] 11 |     let len = reader.read_line(&mut line);
[INFO] [stderr]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_len`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `len`
[INFO] [stderr]  --> rapd/examples/rebuild_music_database.rs:8:9
[INFO] [stderr]   |
[INFO] [stderr] 8 |     let len = stream.write(b"{\"request_type\":\"rebuild_music_db\"}\n");
[INFO] [stderr]   |         ^^^ help: if this is intentional, prefix it with an underscore: `_len`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `len`
[INFO] [stderr]   --> rapd/examples/rebuild_music_database.rs:11:9
[INFO] [stderr]    |
[INFO] [stderr] 11 |     let len = reader.read_line(&mut line);
[INFO] [stderr]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_len`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `len`
[INFO] [stderr]  --> rapd/examples/shutdown.rs:8:9
[INFO] [stderr]   |
[INFO] [stderr] 8 |     let len = stream.write(b"{\"request_type\":\"server_shutdown\"}\n");
[INFO] [stderr]   |         ^^^ help: if this is intentional, prefix it with an underscore: `_len`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `len`
[INFO] [stderr]   --> rapd/examples/shutdown.rs:11:9
[INFO] [stderr]    |
[INFO] [stderr] 11 |     let len = reader.read_line(&mut line);
[INFO] [stderr]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_len`
[INFO] [stderr] 
[INFO] [stderr] warning: `rapd` (example "play_audio_file") generated 2 warnings
[INFO] [stderr] warning: `rapd` (example "get_music") generated 2 warnings
[INFO] [stderr] warning: `rapd` (example "get_playing") generated 2 warnings
[INFO] [stderr] warning: `rapd` (example "stop_player") generated 2 warnings
[INFO] [stderr] warning: `rapd` (example "rebuild_music_database") generated 2 warnings
[INFO] [stderr] warning: `rapd` (example "shutdown") generated 2 warnings
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 2.16s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/rapc-922a3bcde405881b)
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/rapd-f0e0d4b513d3181a)
[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" "946bbd681a1f0933cee988e9564e90994af1057c1cb4f411cca13f0041009ec4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "946bbd681a1f0933cee988e9564e90994af1057c1cb4f411cca13f0041009ec4", kill_on_drop: false }`
[INFO] [stdout] 946bbd681a1f0933cee988e9564e90994af1057c1cb4f411cca13f0041009ec4