[INFO] cloning repository https://github.com/tswett/ambrose
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/tswett/ambrose" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftswett%2Fambrose", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftswett%2Fambrose'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] eeb68e7b95791284a22151d691914649d009c243
[INFO] testing tswett/ambrose against beta-2022-04-10 for beta-1.61-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftswett%2Fambrose" "/workspace/builds/worker-4/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/tswett/ambrose on toolchain beta-2022-04-10
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/tswett/ambrose
[INFO] finished tweaking git repo https://github.com/tswett/ambrose
[INFO] tweaked toml for git repo https://github.com/tswett/ambrose written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/tswett/ambrose already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 615c4f071845e7b1863d6f1cb6bb1f625fc99651abb2dc2ceea4a9d8676d0636
[INFO] running `Command { std: "docker" "start" "-a" "615c4f071845e7b1863d6f1cb6bb1f625fc99651abb2dc2ceea4a9d8676d0636", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "615c4f071845e7b1863d6f1cb6bb1f625fc99651abb2dc2ceea4a9d8676d0636", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "615c4f071845e7b1863d6f1cb6bb1f625fc99651abb2dc2ceea4a9d8676d0636", kill_on_drop: false }`
[INFO] [stdout] 615c4f071845e7b1863d6f1cb6bb1f625fc99651abb2dc2ceea4a9d8676d0636
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 58abe9de87ed5d02e3dec4df79c81f710caa4046d90dfb31c17293be7fb41b20
[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" "58abe9de87ed5d02e3dec4df79c81f710caa4046d90dfb31c17293be7fb41b20", kill_on_drop: false }`
[INFO] [stderr]    Compiling ambrose v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function is never used: `note`
[INFO] [stdout]   --> src/main.rs:38:4
[INFO] [stdout]    |
[INFO] [stdout] 38 | fn note(next_note_index: u32, motor_id: u8, frequency: u32, length: u32) -> NoteInfo {
[INFO] [stdout]    |    ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `play_pachelbel`
[INFO] [stdout]   --> src/main.rs:70:4
[INFO] [stdout]    |
[INFO] [stdout] 70 | fn play_pachelbel() -> Result<(), Box<dyn Error>> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `slur`
[INFO] [stdout]   --> src/notes.rs:18:12
[INFO] [stdout]    |
[INFO] [stdout] 18 |     pub fn slur(self) -> Self {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `BEAT_DURATION`
[INFO] [stdout]  --> src/songs/peaceofmind.rs:4:1
[INFO] [stdout]   |
[INFO] [stdout] 4 | const BEAT_DURATION: u64 = 117188;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `note`
[INFO] [stdout]  --> src/songs/peaceofmind.rs:6:4
[INFO] [stdout]   |
[INFO] [stdout] 6 | fn note(octave: i16, pitch: i16, duration: u64) -> NoteInfo {
[INFO] [stdout]   |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `build_song`
[INFO] [stdout]   --> src/songs/peaceofmind.rs:21:8
[INFO] [stdout]    |
[INFO] [stdout] 21 | pub fn build_song() -> SongBuilder {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.40s
[INFO] running `Command { std: "docker" "inspect" "58abe9de87ed5d02e3dec4df79c81f710caa4046d90dfb31c17293be7fb41b20", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "58abe9de87ed5d02e3dec4df79c81f710caa4046d90dfb31c17293be7fb41b20", kill_on_drop: false }`
[INFO] [stdout] 58abe9de87ed5d02e3dec4df79c81f710caa4046d90dfb31c17293be7fb41b20
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1d24068750d461c040d0aee8c2568a9f2053054eb6dad0b8bfb0744cef079524
[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" "1d24068750d461c040d0aee8c2568a9f2053054eb6dad0b8bfb0744cef079524", kill_on_drop: false }`
[INFO] [stderr]    Compiling ambrose v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function is never used: `note`
[INFO] [stdout]   --> src/main.rs:38:4
[INFO] [stdout]    |
[INFO] [stdout] 38 | fn note(next_note_index: u32, motor_id: u8, frequency: u32, length: u32) -> NoteInfo {
[INFO] [stdout]    |    ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `play_pachelbel`
[INFO] [stdout]   --> src/main.rs:70:4
[INFO] [stdout]    |
[INFO] [stdout] 70 | fn play_pachelbel() -> Result<(), Box<dyn Error>> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `slur`
[INFO] [stdout]   --> src/notes.rs:18:12
[INFO] [stdout]    |
[INFO] [stdout] 18 |     pub fn slur(self) -> Self {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `BEAT_DURATION`
[INFO] [stdout]  --> src/songs/peaceofmind.rs:4:1
[INFO] [stdout]   |
[INFO] [stdout] 4 | const BEAT_DURATION: u64 = 117188;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `note`
[INFO] [stdout]  --> src/songs/peaceofmind.rs:6:4
[INFO] [stdout]   |
[INFO] [stdout] 6 | fn note(octave: i16, pitch: i16, duration: u64) -> NoteInfo {
[INFO] [stdout]   |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `build_song`
[INFO] [stdout]   --> src/songs/peaceofmind.rs:21:8
[INFO] [stdout]    |
[INFO] [stdout] 21 | pub fn build_song() -> SongBuilder {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.10s
[INFO] [stderr]   Executable unittests src/main.rs (/opt/rustwide/target/debug/deps/ambrose-6037a7f6212a9153)
[INFO] running `Command { std: "docker" "inspect" "1d24068750d461c040d0aee8c2568a9f2053054eb6dad0b8bfb0744cef079524", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1d24068750d461c040d0aee8c2568a9f2053054eb6dad0b8bfb0744cef079524", kill_on_drop: false }`
[INFO] [stdout] 1d24068750d461c040d0aee8c2568a9f2053054eb6dad0b8bfb0744cef079524
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "test" "--frozen", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 2151c7f41a087931b2aca007dd1412019b9ede4d1c1c4b5d1f3eafb22b54bce6
[INFO] running `Command { std: "docker" "start" "-a" "2151c7f41a087931b2aca007dd1412019b9ede4d1c1c4b5d1f3eafb22b54bce6", kill_on_drop: false }`
[INFO] [stderr] warning: function is never used: `note`
[INFO] [stderr]   --> src/main.rs:38:4
[INFO] [stderr]    |
[INFO] [stderr] 38 | fn note(next_note_index: u32, motor_id: u8, frequency: u32, length: u32) -> NoteInfo {
[INFO] [stderr]    |    ^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `play_pachelbel`
[INFO] [stderr]   --> src/main.rs:70:4
[INFO] [stderr]    |
[INFO] [stderr] 70 | fn play_pachelbel() -> Result<(), Box<dyn Error>> {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `slur`
[INFO] [stderr]   --> src/notes.rs:18:12
[INFO] [stderr]    |
[INFO] [stderr] 18 |     pub fn slur(self) -> Self {
[INFO] [stderr]    |            ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant is never used: `BEAT_DURATION`
[INFO] [stderr]  --> src/songs/peaceofmind.rs:4:1
[INFO] [stderr]   |
[INFO] [stderr] 4 | const BEAT_DURATION: u64 = 117188;
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `note`
[INFO] [stderr]  --> src/songs/peaceofmind.rs:6:4
[INFO] [stderr]   |
[INFO] [stderr] 6 | fn note(octave: i16, pitch: i16, duration: u64) -> NoteInfo {
[INFO] [stderr]   |    ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `build_song`
[INFO] [stderr]   --> src/songs/peaceofmind.rs:21:8
[INFO] [stderr]    |
[INFO] [stderr] 21 | pub fn build_song() -> SongBuilder {
[INFO] [stderr]    |        ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `ambrose` (bin "ambrose" test) generated 6 warnings
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.10s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/ambrose-6037a7f6212a9153)
[INFO] [stdout] running 1 test
[INFO] [stdout] test motor::tests::can_create_test_motor ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "2151c7f41a087931b2aca007dd1412019b9ede4d1c1c4b5d1f3eafb22b54bce6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2151c7f41a087931b2aca007dd1412019b9ede4d1c1c4b5d1f3eafb22b54bce6", kill_on_drop: false }`
[INFO] [stdout] 2151c7f41a087931b2aca007dd1412019b9ede4d1c1c4b5d1f3eafb22b54bce6