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[INFO] [stderr]    Compiling rsynth-core v0.1.0 (/opt/rustwide/workdir/crates/core)
[INFO] [stderr]    Compiling rsynth-lang v0.1.0 (/opt/rustwide/workdir/crates/lang)
[INFO] [stderr]    Compiling rsynth-engine v0.1.0 (/opt/rustwide/workdir/crates/engine)
[INFO] [stdout] warning: unused imports: `Arc` and `Mutex`
[INFO] [stdout]  --> crates/engine/src/playback.rs:5:17
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::sync::{Arc, Mutex};
[INFO] [stdout]   |                 ^^^  ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `create_instrument_synth`
[INFO] [stdout]  --> crates/engine/src/export.rs:1:44
[INFO] [stdout]   |
[INFO] [stdout] 1 | use rsynth_core::{Song, InstrumentLibrary, create_instrument_synth};
[INFO] [stdout]   |                                            ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `SynthNode` and `create_instrument_synth`
[INFO] [stdout]  --> crates/engine/src/sequencer.rs:1:44
[INFO] [stdout]   |
[INFO] [stdout] 1 | use rsynth_core::{Song, InstrumentLibrary, create_instrument_synth, SynthNode};
[INFO] [stdout]   |                                            ^^^^^^^^^^^^^^^^^^^^^^^  ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `debug`
[INFO] [stdout]  --> crates/engine/src/sequencer.rs:5:21
[INFO] [stdout]   |
[INFO] [stdout] 5 | use tracing::{info, debug};
[INFO] [stdout]   |                     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Envelope`, `FilterType`, and `WaveformType`
[INFO] [stdout]  --> crates/lang/src/parser.rs:5:19
[INFO] [stdout]   |
[INFO] [stdout] 5 | use rsynth_core::{WaveformType, Envelope, FilterType, InstrumentDefinition};
[INFO] [stdout]   |                   ^^^^^^^^^^^^  ^^^^^^^^  ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Envelope`, `FilterType`, and `WaveformType`
[INFO] [stdout]  --> crates/lang/src/ast.rs:1:63
[INFO] [stdout]   |
[INFO] [stdout] 1 | use rsynth_core::{InstrumentDefinition, Pattern, Song, Track, WaveformType, Envelope, FilterType};
[INFO] [stdout]   |                                                               ^^^^^^^^^^^^  ^^^^^^^^  ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `fundsp::prelude`
[INFO] [stdout]  --> crates/engine/src/export.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use fundsp::prelude::*;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `instruments`
[INFO] [stdout]   --> crates/engine/src/export.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 |     instruments: &InstrumentLibrary,
[INFO] [stdout]    |     ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_instruments`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> crates/engine/src/playback.rs:26:14
[INFO] [stdout]    |
[INFO] [stdout] 26 |         let (mut sequencer, command_tx) = Sequencer::new(song, instruments, sample_rate);
[INFO] [stdout]    |              ----^^^^^^^^^
[INFO] [stdout]    |              |
[INFO] [stdout]    |              help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `beat`
[INFO] [stdout]   --> crates/engine/src/sequencer.rs:84:17
[INFO] [stdout]    |
[INFO] [stdout] 84 |             let beat = (time * 2.0) as usize;
[INFO] [stdout]    |                 ^^^^ help: if this is intentional, prefix it with an underscore: `_beat`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `channels`
[INFO] [stdout]   --> crates/engine/src/playback.rs:53:13
[INFO] [stdout]    |
[INFO] [stdout] 53 |         let channels = config.channels as usize;
[INFO] [stdout]    |             ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_channels`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `instruments` and `mixer` are never read
[INFO] [stdout]   --> crates/engine/src/sequencer.rs:16:5
[INFO] [stdout]    |
[INFO] [stdout] 14 | pub struct Sequencer {
[INFO] [stdout]    |            --------- fields in this struct
[INFO] [stdout] 15 |     song: Arc<Mutex<Song>>,
[INFO] [stdout] 16 |     instruments: Arc<InstrumentLibrary>,
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 22 |     mixer: Box<dyn AudioUnit>,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling synthesis-examples v0.1.0 (/opt/rustwide/workdir/examples/synthesis)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> crates/lang/src/parser.rs:102:9
[INFO] [stdout]     |
[INFO] [stdout] 102 |     let mut inner = pair.into_inner();
[INFO] [stdout]     |         ----^^^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `name` is never used
[INFO] [stdout]   --> examples/synthesis/../prototype2_modular.rs:12:8
[INFO] [stdout]    |
[INFO] [stdout]  8 | trait Module: Send {
[INFO] [stdout]    |       ------ method in this trait
[INFO] [stdout] ...
[INFO] [stdout] 12 |     fn name(&self) -> &str;
[INFO] [stdout]    |        ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `hihat_open` is never used
[INFO] [stdout]   --> examples/synthesis/../prototype1_functional.rs:49:4
[INFO] [stdout]    |
[INFO] [stdout] 49 | fn hihat_open() -> impl AudioUnit + Clone {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling rsynth-cli v0.1.0 (/opt/rustwide/workdir/crates/cli)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1m 50s
[INFO] running `Command { std: "docker" "inspect" "7a488a289518ec73372dfd8a5214fa516396f836419b4b354c78237371020135", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7a488a289518ec73372dfd8a5214fa516396f836419b4b354c78237371020135", kill_on_drop: false }`
[INFO] [stdout] 7a488a289518ec73372dfd8a5214fa516396f836419b4b354c78237371020135
[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" "-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+4987e9d4227139400384ab59296ffee3b0fb1183" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0edf1f5ca29297885ff735831fb7044b0deee532939c9368ca4149f05d31f832
[INFO] running `Command { std: "docker" "start" "-a" "0edf1f5ca29297885ff735831fb7044b0deee532939c9368ca4149f05d31f832", kill_on_drop: false }`
[INFO] [stdout] warning: unused imports: `Arc` and `Mutex`
[INFO] [stdout]  --> crates/engine/src/playback.rs:5:17
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::sync::{Arc, Mutex};
[INFO] [stdout]   |                 ^^^  ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `create_instrument_synth`
[INFO] [stdout]  --> crates/engine/src/export.rs:1:44
[INFO] [stdout]   |
[INFO] [stdout] 1 | use rsynth_core::{Song, InstrumentLibrary, create_instrument_synth};
[INFO] [stdout]   |                                            ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `SynthNode` and `create_instrument_synth`
[INFO] [stdout]  --> crates/engine/src/sequencer.rs:1:44
[INFO] [stdout]   |
[INFO] [stdout] 1 | use rsynth_core::{Song, InstrumentLibrary, create_instrument_synth, SynthNode};
[INFO] [stdout]   |                                            ^^^^^^^^^^^^^^^^^^^^^^^  ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `debug`
[INFO] [stdout]  --> crates/engine/src/sequencer.rs:5:21
[INFO] [stdout]   |
[INFO] [stdout] 5 | use tracing::{info, debug};
[INFO] [stdout]   |                     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `fundsp::prelude`
[INFO] [stdout]  --> crates/engine/src/export.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use fundsp::prelude::*;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `instruments`
[INFO] [stdout]   --> crates/engine/src/export.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 |     instruments: &InstrumentLibrary,
[INFO] [stdout]    |     ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_instruments`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> crates/engine/src/playback.rs:26:14
[INFO] [stdout]    |
[INFO] [stdout] 26 |         let (mut sequencer, command_tx) = Sequencer::new(song, instruments, sample_rate);
[INFO] [stdout]    |              ----^^^^^^^^^
[INFO] [stdout]    |              |
[INFO] [stdout]    |              help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `beat`
[INFO] [stdout]   --> crates/engine/src/sequencer.rs:84:17
[INFO] [stdout]    |
[INFO] [stdout] 84 |             let beat = (time * 2.0) as usize;
[INFO] [stdout]    |                 ^^^^ help: if this is intentional, prefix it with an underscore: `_beat`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `channels`
[INFO] [stdout]   --> crates/engine/src/playback.rs:53:13
[INFO] [stdout]    |
[INFO] [stdout] 53 |         let channels = config.channels as usize;
[INFO] [stdout]    |             ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_channels`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `instruments` and `mixer` are never read
[INFO] [stdout]   --> crates/engine/src/sequencer.rs:16:5
[INFO] [stdout]    |
[INFO] [stdout] 14 | pub struct Sequencer {
[INFO] [stdout]    |            --------- fields in this struct
[INFO] [stdout] 15 |     song: Arc<Mutex<Song>>,
[INFO] [stdout] 16 |     instruments: Arc<InstrumentLibrary>,
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 22 |     mixer: Box<dyn AudioUnit>,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Envelope`, `FilterType`, and `WaveformType`
[INFO] [stdout]  --> crates/lang/src/parser.rs:5:19
[INFO] [stdout]   |
[INFO] [stdout] 5 | use rsynth_core::{WaveformType, Envelope, FilterType, InstrumentDefinition};
[INFO] [stdout]   |                   ^^^^^^^^^^^^  ^^^^^^^^  ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Envelope`, `FilterType`, and `WaveformType`
[INFO] [stdout]  --> crates/lang/src/ast.rs:1:63
[INFO] [stdout]   |
[INFO] [stdout] 1 | use rsynth_core::{InstrumentDefinition, Pattern, Song, Track, WaveformType, Envelope, FilterType};
[INFO] [stdout]   |                                                               ^^^^^^^^^^^^  ^^^^^^^^  ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> crates/lang/src/parser.rs:102:9
[INFO] [stdout]     |
[INFO] [stdout] 102 |     let mut inner = pair.into_inner();
[INFO] [stdout]     |         ----^^^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling synthesis-examples v0.1.0 (/opt/rustwide/workdir/examples/synthesis)
[INFO] [stderr]    Compiling rsynth-cli v0.1.0 (/opt/rustwide/workdir/crates/cli)
[INFO] [stderr]    Compiling rsynth-engine v0.1.0 (/opt/rustwide/workdir/crates/engine)
[INFO] [stdout] warning: method `name` is never used
[INFO] [stdout]   --> examples/synthesis/../prototype2_modular.rs:12:8
[INFO] [stdout]    |
[INFO] [stdout]  8 | trait Module: Send {
[INFO] [stdout]    |       ------ method in this trait
[INFO] [stdout] ...
[INFO] [stdout] 12 |     fn name(&self) -> &str;
[INFO] [stdout]    |        ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling rsynth-lang v0.1.0 (/opt/rustwide/workdir/crates/lang)
[INFO] [stderr]    Compiling rsynth-core v0.1.0 (/opt/rustwide/workdir/crates/core)
[INFO] [stdout] warning: unused imports: `Arc` and `Mutex`
[INFO] [stdout]  --> crates/engine/src/playback.rs:5:17
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::sync::{Arc, Mutex};
[INFO] [stdout]   |                 ^^^  ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `create_instrument_synth`
[INFO] [stdout]  --> crates/engine/src/export.rs:1:44
[INFO] [stdout]   |
[INFO] [stdout] 1 | use rsynth_core::{Song, InstrumentLibrary, create_instrument_synth};
[INFO] [stdout]   |                                            ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `SynthNode` and `create_instrument_synth`
[INFO] [stdout]  --> crates/engine/src/sequencer.rs:1:44
[INFO] [stdout]   |
[INFO] [stdout] 1 | use rsynth_core::{Song, InstrumentLibrary, create_instrument_synth, SynthNode};
[INFO] [stdout]   |                                            ^^^^^^^^^^^^^^^^^^^^^^^  ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `debug`
[INFO] [stdout]  --> crates/engine/src/sequencer.rs:5:21
[INFO] [stdout]   |
[INFO] [stdout] 5 | use tracing::{info, debug};
[INFO] [stdout]   |                     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Envelope`, `FilterType`, and `WaveformType`
[INFO] [stdout]  --> crates/lang/src/parser.rs:5:19
[INFO] [stdout]   |
[INFO] [stdout] 5 | use rsynth_core::{WaveformType, Envelope, FilterType, InstrumentDefinition};
[INFO] [stdout]   |                   ^^^^^^^^^^^^  ^^^^^^^^  ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Envelope`, `FilterType`, and `WaveformType`
[INFO] [stdout]  --> crates/lang/src/ast.rs:1:63
[INFO] [stdout]   |
[INFO] [stdout] 1 | use rsynth_core::{InstrumentDefinition, Pattern, Song, Track, WaveformType, Envelope, FilterType};
[INFO] [stdout]   |                                                               ^^^^^^^^^^^^  ^^^^^^^^  ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `hihat_open` is never used
[INFO] [stdout]   --> examples/synthesis/../prototype1_functional.rs:49:4
[INFO] [stdout]    |
[INFO] [stdout] 49 | fn hihat_open() -> impl AudioUnit + Clone {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `fundsp::prelude`
[INFO] [stdout]  --> crates/engine/src/export.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use fundsp::prelude::*;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> crates/engine/src/playback.rs:26:14
[INFO] [stdout]    |
[INFO] [stdout] 26 |         let (mut sequencer, command_tx) = Sequencer::new(song, instruments, sample_rate);
[INFO] [stdout]    |              ----^^^^^^^^^
[INFO] [stdout]    |              |
[INFO] [stdout]    |              help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `channels`
[INFO] [stdout]   --> crates/engine/src/playback.rs:53:13
[INFO] [stdout]    |
[INFO] [stdout] 53 |         let channels = config.channels as usize;
[INFO] [stdout]    |             ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_channels`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `instruments`
[INFO] [stdout]   --> crates/engine/src/export.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 |     instruments: &InstrumentLibrary,
[INFO] [stdout]    |     ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_instruments`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `beat`
[INFO] [stdout]   --> crates/engine/src/sequencer.rs:84:17
[INFO] [stdout]    |
[INFO] [stdout] 84 |             let beat = (time * 2.0) as usize;
[INFO] [stdout]    |                 ^^^^ help: if this is intentional, prefix it with an underscore: `_beat`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `instruments` and `mixer` are never read
[INFO] [stdout]   --> crates/engine/src/sequencer.rs:16:5
[INFO] [stdout]    |
[INFO] [stdout] 14 | pub struct Sequencer {
[INFO] [stdout]    |            --------- fields in this struct
[INFO] [stdout] 15 |     song: Arc<Mutex<Song>>,
[INFO] [stdout] 16 |     instruments: Arc<InstrumentLibrary>,
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 22 |     mixer: Box<dyn AudioUnit>,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> crates/lang/src/parser.rs:102:9
[INFO] [stdout]     |
[INFO] [stdout] 102 |     let mut inner = pair.into_inner();
[INFO] [stdout]     |         ----^^^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 4.03s
[INFO] running `Command { std: "docker" "inspect" "0edf1f5ca29297885ff735831fb7044b0deee532939c9368ca4149f05d31f832", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0edf1f5ca29297885ff735831fb7044b0deee532939c9368ca4149f05d31f832", kill_on_drop: false }`
[INFO] [stdout] 0edf1f5ca29297885ff735831fb7044b0deee532939c9368ca4149f05d31f832
