[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] 293764cb651b4638f003971bdccdac2e9c06b1b2
[INFO] checking tswett/ambrose against try#f3dc08d20a1589b87bde75bb82ee6423307f9bde for pr-135733
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftswett%2Fambrose" "/workspace/builds/worker-1-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/tswett/ambrose on toolchain f3dc08d20a1589b87bde75bb82ee6423307f9bde
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+f3dc08d20a1589b87bde75bb82ee6423307f9bde" "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-1-tc2/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: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+f3dc08d20a1589b87bde75bb82ee6423307f9bde" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded rppal v0.12.0
[INFO] [stderr]   Downloaded combine v4.6.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/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@sha256:3959728d45483eb673ba100a951a6b9f5012970368db2a9e08e0ac9b67c8a5ad" "/opt/rustwide/cargo-home/bin/cargo" "+f3dc08d20a1589b87bde75bb82ee6423307f9bde" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e1522fbefd5bc102e9e46ff3ae703bfe35c501ff5397d881b5bf87d77297ffce
[INFO] running `Command { std: "docker" "start" "-a" "e1522fbefd5bc102e9e46ff3ae703bfe35c501ff5397d881b5bf87d77297ffce", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e1522fbefd5bc102e9e46ff3ae703bfe35c501ff5397d881b5bf87d77297ffce", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e1522fbefd5bc102e9e46ff3ae703bfe35c501ff5397d881b5bf87d77297ffce", kill_on_drop: false }`
[INFO] [stdout] e1522fbefd5bc102e9e46ff3ae703bfe35c501ff5397d881b5bf87d77297ffce
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/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" "RUSTDOCFLAGS=--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@sha256:3959728d45483eb673ba100a951a6b9f5012970368db2a9e08e0ac9b67c8a5ad" "/opt/rustwide/cargo-home/bin/cargo" "+f3dc08d20a1589b87bde75bb82ee6423307f9bde" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ae3be57ed577090cab1d5e74ffe01d29ad1a68285a25272869b971d2376e9291
[INFO] running `Command { std: "docker" "start" "-a" "ae3be57ed577090cab1d5e74ffe01d29ad1a68285a25272869b971d2376e9291", kill_on_drop: false }`
[INFO] [stderr]     Checking ambrose v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function `note` is never used
[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 `play_pachelbel` is never used
[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: method `slur` is never used
[INFO] [stdout]   --> src/notes.rs:18:12
[INFO] [stdout]    |
[INFO] [stdout] 17 | impl NoteInfo {
[INFO] [stdout]    | ------------- method in this implementation
[INFO] [stdout] 18 |     pub fn slur(self) -> Self {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `BEAT_DURATION` is never used
[INFO] [stdout]  --> src/songs/peaceofmind.rs:4:7
[INFO] [stdout]   |
[INFO] [stdout] 4 | const BEAT_DURATION: u64 = 117188;
[INFO] [stdout]   |       ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `note` is never used
[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 `build_song` is never used
[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: function `note` is never used
[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 `play_pachelbel` is never used
[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: method `slur` is never used
[INFO] [stdout]   --> src/notes.rs:18:12
[INFO] [stdout]    |
[INFO] [stdout] 17 | impl NoteInfo {
[INFO] [stdout]    | ------------- method in this implementation
[INFO] [stdout] 18 |     pub fn slur(self) -> Self {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `BEAT_DURATION` is never used
[INFO] [stdout]  --> src/songs/peaceofmind.rs:4:7
[INFO] [stdout]   |
[INFO] [stdout] 4 | const BEAT_DURATION: u64 = 117188;
[INFO] [stdout]   |       ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `note` is never used
[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 `build_song` is never used
[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] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.23s
[INFO] running `Command { std: "docker" "inspect" "ae3be57ed577090cab1d5e74ffe01d29ad1a68285a25272869b971d2376e9291", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ae3be57ed577090cab1d5e74ffe01d29ad1a68285a25272869b971d2376e9291", kill_on_drop: false }`
[INFO] [stdout] ae3be57ed577090cab1d5e74ffe01d29ad1a68285a25272869b971d2376e9291