[INFO] cloning repository https://github.com/qlurkin/synthesizer
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/qlurkin/synthesizer" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fqlurkin%2Fsynthesizer", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fqlurkin%2Fsynthesizer'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 0488fc5593aab240747aa88cb29095f9e6ad2e6e
[INFO] checking qlurkin/synthesizer against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fqlurkin%2Fsynthesizer" "/workspace/builds/worker-6-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/qlurkin/synthesizer
[INFO] finished tweaking git repo https://github.com/qlurkin/synthesizer
[INFO] tweaked toml for git repo https://github.com/qlurkin/synthesizer written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/qlurkin/synthesizer on toolchain 4f260f0f20b3133d20cfb50353c0221943af5796
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/qlurkin/synthesizer 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" "+4f260f0f20b3133d20cfb50353c0221943af5796" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
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[INFO] [stdout] 3d659955e9056cbd714c350125dd6c8299b5be26dcd99ea96be06513866129ac
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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 -Dunmustuse_in_always_ok" "-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 23f86c13b9d9eb46a9492f8fcfc3b09f58f76679de7e87149dca2eb62b527d95
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[INFO] [stdout] warning: unused variable: `track_id`
[INFO] [stdout]    --> src/tracker/mod.rs:363:32
[INFO] [stdout]     |
[INFO] [stdout] 363 |     fn update_track(&mut self, track_id: usize, next_step_time: f32) {}
[INFO] [stdout]     |                                ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_track_id`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `next_step_time`
[INFO] [stdout]    --> src/tracker/mod.rs:363:49
[INFO] [stdout]     |
[INFO] [stdout] 363 |     fn update_track(&mut self, track_id: usize, next_step_time: f32) {}
[INFO] [stdout]     |                                                 ^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_next_step_time`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `track_id`
[INFO] [stdout]    --> src/tracker/mod.rs:363:32
[INFO] [stdout]     |
[INFO] [stdout] 363 |     fn update_track(&mut self, track_id: usize, next_step_time: f32) {}
[INFO] [stdout]     |                                ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_track_id`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `next_step_time`
[INFO] [stdout]    --> src/tracker/mod.rs:363:49
[INFO] [stdout]     |
[INFO] [stdout] 363 |     fn update_track(&mut self, track_id: usize, next_step_time: f32) {}
[INFO] [stdout]     |                                                 ^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_next_step_time`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `tone`, `chains`, and `play_time` are never read
[INFO] [stdout]   --> src/tracker/mod.rs:26:9
[INFO] [stdout]    |
[INFO] [stdout] 25 | pub struct Tracker {
[INFO] [stdout]    |            ------- fields in this struct
[INFO] [stdout] 26 |     pub tone: Tone,
[INFO] [stdout]    |         ^^^^
[INFO] [stdout] 27 |     pub tracks: Vec<Track>,
[INFO] [stdout] 28 |     pub chains: Vec<Option<Chain>>,
[INFO] [stdout]    |         ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 58 |     pub play_time: Duration,
[INFO] [stdout]    |         ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `phrases` is never read
[INFO] [stdout]  --> src/tracker/chain.rs:2:9
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub struct Chain {
[INFO] [stdout]   |            ----- field in this struct
[INFO] [stdout] 2 |     pub phrases: Vec<Option<usize>>,
[INFO] [stdout]   |         ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `None` is never constructed
[INFO] [stdout]   --> src/tracker/envelope.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout]  4 | pub enum Envelope {
[INFO] [stdout]    |          -------- variant in this enum
[INFO] [stdout] ...
[INFO] [stdout] 10 |     None,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Envelope` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `None` is never constructed
[INFO] [stdout]  --> src/tracker/instrument_type.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub enum InstrumentType {
[INFO] [stdout]   |          -------------- variant in this enum
[INFO] [stdout] 6 |     None,
[INFO] [stdout]   |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `instrument` and `velocity` are never read
[INFO] [stdout]  --> src/tracker/step.rs:5:9
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub struct Step {
[INFO] [stdout]   |            ---- fields in this struct
[INFO] [stdout] 4 |     pub tone: Tone,
[INFO] [stdout] 5 |     pub instrument: usize,
[INFO] [stdout]   |         ^^^^^^^^^^
[INFO] [stdout] 6 |     pub velocity: u8,
[INFO] [stdout]   |         ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `chains`, `event_id`, `chain_cursor`, and `phrase_cursor` are never read
[INFO] [stdout]   --> src/tracker/track.rs:4:9
[INFO] [stdout]    |
[INFO] [stdout]  3 | pub struct Track {
[INFO] [stdout]    |            ----- fields in this struct
[INFO] [stdout]  4 |     pub chains: Vec<Option<usize>>,
[INFO] [stdout]    |         ^^^^^^
[INFO] [stdout]  5 |     pub event_id: Option<EventId>,
[INFO] [stdout]    |         ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 11 |     pub chain_cursor: usize,
[INFO] [stdout]    |         ^^^^^^^^^^^^
[INFO] [stdout] 12 |     pub phrase_cursor: usize,
[INFO] [stdout]    |         ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Sine`, `Triangle`, `Square`, and `Pulse` are never constructed
[INFO] [stdout]  --> src/tracker/waveform.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub enum Waveform {
[INFO] [stdout]   |          -------- variants in this enum
[INFO] [stdout] 4 |     Sine,
[INFO] [stdout]   |     ^^^^
[INFO] [stdout] 5 |     Saw,
[INFO] [stdout] 6 |     Triangle,
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout] 7 |     Square,
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout] 8 |     Pulse { duty_cycle: f32 },
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `tone`, `chains`, and `play_time` are never read
[INFO] [stdout]   --> src/tracker/mod.rs:26:9
[INFO] [stdout]    |
[INFO] [stdout] 25 | pub struct Tracker {
[INFO] [stdout]    |            ------- fields in this struct
[INFO] [stdout] 26 |     pub tone: Tone,
[INFO] [stdout]    |         ^^^^
[INFO] [stdout] 27 |     pub tracks: Vec<Track>,
[INFO] [stdout] 28 |     pub chains: Vec<Option<Chain>>,
[INFO] [stdout]    |         ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 58 |     pub play_time: Duration,
[INFO] [stdout]    |         ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `phrases` is never read
[INFO] [stdout]  --> src/tracker/chain.rs:2:9
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub struct Chain {
[INFO] [stdout]   |            ----- field in this struct
[INFO] [stdout] 2 |     pub phrases: Vec<Option<usize>>,
[INFO] [stdout]   |         ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `None` is never constructed
[INFO] [stdout]   --> src/tracker/envelope.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout]  4 | pub enum Envelope {
[INFO] [stdout]    |          -------- variant in this enum
[INFO] [stdout] ...
[INFO] [stdout] 10 |     None,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Envelope` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `None` is never constructed
[INFO] [stdout]  --> src/tracker/instrument_type.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub enum InstrumentType {
[INFO] [stdout]   |          -------------- variant in this enum
[INFO] [stdout] 6 |     None,
[INFO] [stdout]   |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `instrument` and `velocity` are never read
[INFO] [stdout]  --> src/tracker/step.rs:5:9
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub struct Step {
[INFO] [stdout]   |            ---- fields in this struct
[INFO] [stdout] 4 |     pub tone: Tone,
[INFO] [stdout] 5 |     pub instrument: usize,
[INFO] [stdout]   |         ^^^^^^^^^^
[INFO] [stdout] 6 |     pub velocity: u8,
[INFO] [stdout]   |         ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `chains`, `event_id`, `chain_cursor`, and `phrase_cursor` are never read
[INFO] [stdout]   --> src/tracker/track.rs:4:9
[INFO] [stdout]    |
[INFO] [stdout]  3 | pub struct Track {
[INFO] [stdout]    |            ----- fields in this struct
[INFO] [stdout]  4 |     pub chains: Vec<Option<usize>>,
[INFO] [stdout]    |         ^^^^^^
[INFO] [stdout]  5 |     pub event_id: Option<EventId>,
[INFO] [stdout]    |         ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 11 |     pub chain_cursor: usize,
[INFO] [stdout]    |         ^^^^^^^^^^^^
[INFO] [stdout] 12 |     pub phrase_cursor: usize,
[INFO] [stdout]    |         ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Sine`, `Triangle`, `Square`, and `Pulse` are never constructed
[INFO] [stdout]  --> src/tracker/waveform.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub enum Waveform {
[INFO] [stdout]   |          -------- variants in this enum
[INFO] [stdout] 4 |     Sine,
[INFO] [stdout]   |     ^^^^
[INFO] [stdout] 5 |     Saw,
[INFO] [stdout] 6 |     Triangle,
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout] 7 |     Square,
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout] 8 |     Pulse { duty_cycle: f32 },
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 17.70s
[INFO] running `Command { std: "docker" "inspect" "23f86c13b9d9eb46a9492f8fcfc3b09f58f76679de7e87149dca2eb62b527d95", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "23f86c13b9d9eb46a9492f8fcfc3b09f58f76679de7e87149dca2eb62b527d95", kill_on_drop: false }`
[INFO] [stdout] 23f86c13b9d9eb46a9492f8fcfc3b09f58f76679de7e87149dca2eb62b527d95
