[INFO] cloning repository https://github.com/gespel/GeSynth
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/gespel/GeSynth" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgespel%2FGeSynth", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgespel%2FGeSynth'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] c1a76d3077cce34fb83d80740aa99c35d8435f5d
[INFO] testing gespel/GeSynth against 1.100.0-beta.1 for beta-1.100-2
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgespel%2FGeSynth" "/workspace/builds/worker-0-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/gespel/GeSynth
[INFO] finished tweaking git repo https://github.com/gespel/GeSynth
[INFO] tweaked toml for git repo https://github.com/gespel/GeSynth written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/gespel/GeSynth on toolchain 1.100.0-beta.1
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.100.0-beta.1" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/gespel/GeSynth 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" "+1.100.0-beta.1" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,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" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:3111399a4047eeb3a02b7a90e478d715f38a8c6669b5c4b49d30a17385265909" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] 352ba32d97833ee6c2663a28aa1fe003f93a9a27dbc416a0d0ca7284f5350d51
[INFO] running `Command { std: "docker" "start" "352ba32d97833ee6c2663a28aa1fe003f93a9a27dbc416a0d0ca7284f5350d51", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "352ba32d97833ee6c2663a28aa1fe003f93a9a27dbc416a0d0ca7284f5350d51", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "352ba32d97833ee6c2663a28aa1fe003f93a9a27dbc416a0d0ca7284f5350d51" "/opt/rustwide/cargo-home/bin/cargo" "+1.100.0-beta.1" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "352ba32d97833ee6c2663a28aa1fe003f93a9a27dbc416a0d0ca7284f5350d51", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-w" "/opt/rustwide/workdir" "--user" "0:0" "352ba32d97833ee6c2663a28aa1fe003f93a9a27dbc416a0d0ca7284f5350d51" "/opt/rustwide/cargo-home/bin/cargo" "+1.100.0-beta.1" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.142
[INFO] [stderr]    Compiling pkg-config v0.3.27
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling arrayvec v0.7.2
[INFO] [stderr]    Compiling bytemuck v1.13.1
[INFO] [stderr]    Compiling parking_lot_core v0.9.7
[INFO] [stderr]    Compiling encoding_rs v0.8.32
[INFO] [stderr]    Compiling cpal v0.15.2
[INFO] [stderr]    Compiling byteorder v1.4.3
[INFO] [stderr]    Compiling dasp_sample v0.11.0
[INFO] [stderr]    Compiling claxon v0.4.3
[INFO] [stderr]    Compiling hound v3.5.0
[INFO] [stderr]    Compiling symphonia-core v0.5.2
[INFO] [stderr]    Compiling ogg v0.8.0
[INFO] [stderr]    Compiling alsa-sys v0.3.1
[INFO] [stderr]    Compiling lewton v0.10.2
[INFO] [stderr]    Compiling symphonia-metadata v0.5.2
[INFO] [stderr]    Compiling symphonia-bundle-mp3 v0.5.2
[INFO] [stderr]    Compiling getrandom v0.2.9
[INFO] [stderr]    Compiling nix v0.24.3
[INFO] [stderr]    Compiling rand_core v0.6.4
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]    Compiling alsa v0.7.0
[INFO] [stderr]    Compiling parking_lot v0.12.1
[INFO] [stderr]    Compiling rand v0.8.5
[INFO] [stderr]    Compiling symphonia v0.5.2
[INFO] [stderr]    Compiling rodio v0.17.1
[INFO] [stderr]    Compiling gesynth v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: denote infinite loops with `loop { ... }`
[INFO] [stdout]   --> src/main.rs:98:9
[INFO] [stdout]    |
[INFO] [stdout] 98 |         while true {
[INFO] [stdout]    |         ^^^^^^^^^^ help: use `loop`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(while_true)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:58:17
[INFO] [stdout]    |
[INFO] [stdout] 58 |             let mut pseudo_sample = (2.0 * PI * frequency * t).sin();
[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: value assigned to `sample` is never read
[INFO] [stdout]   --> src/main.rs:59:30
[INFO] [stdout]    |
[INFO] [stdout] 59 |             let mut sample = 0.0;
[INFO] [stdout]    |                              ^^^ this value is reassigned later and never used
[INFO] [stdout] ...
[INFO] [stdout] 67 |                 sample = 0.0;
[INFO] [stdout]    |                 ------------ `sample` is overwritten here before the previous value is read
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `frequency`
[INFO] [stdout]   --> src/main.rs:73:31
[INFO] [stdout]    |
[INFO] [stdout] 73 |     fn calc_sample(&mut self, frequency: f32, phase: f32) -> f32 {
[INFO] [stdout]    |                               ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_frequency`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `playtime`
[INFO] [stdout]   --> src/main.rs:91:24
[INFO] [stdout]    |
[INFO] [stdout] 91 |     fn play(&mut self, playtime: f32) {
[INFO] [stdout]    |                        ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_playtime`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `bs`
[INFO] [stdout]    --> src/main.rs:112:17
[INFO] [stdout]     |
[INFO] [stdout] 112 |             for bs in 0..sample_rate as i32 {
[INFO] [stdout]     |                 ^^ help: if this is intentional, prefix it with an underscore: `_bs`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `calc_buffer` is never used
[INFO] [stdout]  --> src/main.rs:8:8
[INFO] [stdout]   |
[INFO] [stdout] 6 | trait Synthesizer {
[INFO] [stdout]   |       ----------- method in this trait
[INFO] [stdout] 7 |     fn new(playtime: f32, sample_rate: usize) -> Self;
[INFO] [stdout] 8 |     fn calc_buffer(&mut self, frequency: f32) -> Vec<f32>;
[INFO] [stdout]   |        ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `SynthType` is never used
[INFO] [stdout]   --> src/main.rs:11:6
[INFO] [stdout]    |
[INFO] [stdout] 11 | enum SynthType {
[INFO] [stdout]    |      ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `playtime` and `sample_rate` are never read
[INFO] [stdout]   --> src/main.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 16 | struct SineSynth {
[INFO] [stdout]    |        --------- fields in this struct
[INFO] [stdout] 17 |     playtime: f32,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] 18 |     sample_rate: usize
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `SquareSynth` is never constructed
[INFO] [stdout]   --> src/main.rs:42:8
[INFO] [stdout]    |
[INFO] [stdout] 42 | struct SquareSynth {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `sample_rate` is never read
[INFO] [stdout]   --> src/main.rs:81:5
[INFO] [stdout]    |
[INFO] [stdout] 80 | struct GeSynth {
[INFO] [stdout]    |        ------- field in this struct
[INFO] [stdout] 81 |     sample_rate: usize
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] warning: unused dependency `rand`
[INFO] [stderr]  --> Cargo.toml:2:1
[INFO] [stderr]   |
[INFO] [stderr] 2 | rand = "0.8.5"
[INFO] [stderr]   | ^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `cargo::unused_dependencies` is set to `warn` by default
[INFO] [stderr] help: consider removing the dependency on `rand`
[INFO] [stderr] warning: `gesynth` (manifest) generated 1 warning
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 9.97s
[INFO] running `Command { std: "docker" "inspect" "352ba32d97833ee6c2663a28aa1fe003f93a9a27dbc416a0d0ca7284f5350d51", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-w" "/opt/rustwide/workdir" "--user" "0:0" "352ba32d97833ee6c2663a28aa1fe003f93a9a27dbc416a0d0ca7284f5350d51" "/opt/rustwide/cargo-home/bin/cargo" "+1.100.0-beta.1" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr]    Compiling gesynth v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: denote infinite loops with `loop { ... }`
[INFO] [stdout]   --> src/main.rs:98:9
[INFO] [stdout]    |
[INFO] [stdout] 98 |         while true {
[INFO] [stdout]    |         ^^^^^^^^^^ help: use `loop`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(while_true)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:58:17
[INFO] [stdout]    |
[INFO] [stdout] 58 |             let mut pseudo_sample = (2.0 * PI * frequency * t).sin();
[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: value assigned to `sample` is never read
[INFO] [stdout]   --> src/main.rs:59:30
[INFO] [stdout]    |
[INFO] [stdout] 59 |             let mut sample = 0.0;
[INFO] [stdout]    |                              ^^^ this value is reassigned later and never used
[INFO] [stdout] ...
[INFO] [stdout] 67 |                 sample = 0.0;
[INFO] [stdout]    |                 ------------ `sample` is overwritten here before the previous value is read
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `frequency`
[INFO] [stdout]   --> src/main.rs:73:31
[INFO] [stdout]    |
[INFO] [stdout] 73 |     fn calc_sample(&mut self, frequency: f32, phase: f32) -> f32 {
[INFO] [stdout]    |                               ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_frequency`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `playtime`
[INFO] [stdout]   --> src/main.rs:91:24
[INFO] [stdout]    |
[INFO] [stdout] 91 |     fn play(&mut self, playtime: f32) {
[INFO] [stdout]    |                        ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_playtime`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `bs`
[INFO] [stdout]    --> src/main.rs:112:17
[INFO] [stdout]     |
[INFO] [stdout] 112 |             for bs in 0..sample_rate as i32 {
[INFO] [stdout]     |                 ^^ help: if this is intentional, prefix it with an underscore: `_bs`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `calc_buffer` is never used
[INFO] [stdout]  --> src/main.rs:8:8
[INFO] [stdout]   |
[INFO] [stdout] 6 | trait Synthesizer {
[INFO] [stdout]   |       ----------- method in this trait
[INFO] [stdout] 7 |     fn new(playtime: f32, sample_rate: usize) -> Self;
[INFO] [stdout] 8 |     fn calc_buffer(&mut self, frequency: f32) -> Vec<f32>;
[INFO] [stdout]   |        ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `SynthType` is never used
[INFO] [stdout]   --> src/main.rs:11:6
[INFO] [stdout]    |
[INFO] [stdout] 11 | enum SynthType {
[INFO] [stdout]    |      ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `playtime` and `sample_rate` are never read
[INFO] [stdout]   --> src/main.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 16 | struct SineSynth {
[INFO] [stdout]    |        --------- fields in this struct
[INFO] [stdout] 17 |     playtime: f32,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] 18 |     sample_rate: usize
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `SquareSynth` is never constructed
[INFO] [stdout]   --> src/main.rs:42:8
[INFO] [stdout]    |
[INFO] [stdout] 42 | struct SquareSynth {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `sample_rate` is never read
[INFO] [stdout]   --> src/main.rs:81:5
[INFO] [stdout]    |
[INFO] [stdout] 80 | struct GeSynth {
[INFO] [stdout]    |        ------- field in this struct
[INFO] [stdout] 81 |     sample_rate: usize
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] warning: unused dependency `rand`
[INFO] [stderr]  --> Cargo.toml:2:1
[INFO] [stderr]   |
[INFO] [stderr] 2 | rand = "0.8.5"
[INFO] [stderr]   | ^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `cargo::unused_dependencies` is set to `warn` by default
[INFO] [stderr] help: consider removing the dependency on `rand`
[INFO] [stderr] warning: `gesynth` (manifest) generated 1 warning
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.57s
[INFO] running `Command { std: "docker" "inspect" "352ba32d97833ee6c2663a28aa1fe003f93a9a27dbc416a0d0ca7284f5350d51", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-w" "/opt/rustwide/workdir" "--user" "0:0" "352ba32d97833ee6c2663a28aa1fe003f93a9a27dbc416a0d0ca7284f5350d51" "/opt/rustwide/cargo-home/bin/cargo" "+1.100.0-beta.1" "test" "--frozen", kill_on_drop: false }`
[INFO] [stderr] warning: denote infinite loops with `loop { ... }`
[INFO] [stderr]   --> src/main.rs:98:9
[INFO] [stderr]    |
[INFO] [stderr] 98 |         while true {
[INFO] [stderr]    |         ^^^^^^^^^^ help: use `loop`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(while_true)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:58:17
[INFO] [stderr]    |
[INFO] [stderr] 58 |             let mut pseudo_sample = (2.0 * PI * frequency * t).sin();
[INFO] [stderr]    |                 ----^^^^^^^^^^^^^
[INFO] [stderr]    |                 |
[INFO] [stderr]    |                 help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `sample` is never read
[INFO] [stderr]   --> src/main.rs:59:30
[INFO] [stderr]    |
[INFO] [stderr] 59 |             let mut sample = 0.0;
[INFO] [stderr]    |                              ^^^ this value is reassigned later and never used
[INFO] [stderr] ...
[INFO] [stderr] 67 |                 sample = 0.0;
[INFO] [stderr]    |                 ------------ `sample` is overwritten here before the previous value is read
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `frequency`
[INFO] [stderr]   --> src/main.rs:73:31
[INFO] [stderr]    |
[INFO] [stderr] 73 |     fn calc_sample(&mut self, frequency: f32, phase: f32) -> f32 {
[INFO] [stderr]    |                               ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_frequency`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `playtime`
[INFO] [stderr]   --> src/main.rs:91:24
[INFO] [stderr]    |
[INFO] [stderr] 91 |     fn play(&mut self, playtime: f32) {
[INFO] [stderr]    |                        ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_playtime`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `bs`
[INFO] [stderr]    --> src/main.rs:112:17
[INFO] [stderr]     |
[INFO] [stderr] 112 |             for bs in 0..sample_rate as i32 {
[INFO] [stderr]     |                 ^^ help: if this is intentional, prefix it with an underscore: `_bs`
[INFO] [stderr] 
[INFO] [stderr] warning: method `calc_buffer` is never used
[INFO] [stderr]  --> src/main.rs:8:8
[INFO] [stderr]   |
[INFO] [stderr] 6 | trait Synthesizer {
[INFO] [stderr]   |       ----------- method in this trait
[INFO] [stderr] 7 |     fn new(playtime: f32, sample_rate: usize) -> Self;
[INFO] [stderr] 8 |     fn calc_buffer(&mut self, frequency: f32) -> Vec<f32>;
[INFO] [stderr]   |        ^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: enum `SynthType` is never used
[INFO] [stderr]   --> src/main.rs:11:6
[INFO] [stderr]    |
[INFO] [stderr] 11 | enum SynthType {
[INFO] [stderr]    |      ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: fields `playtime` and `sample_rate` are never read
[INFO] [stderr]   --> src/main.rs:17:5
[INFO] [stderr]    |
[INFO] [stderr] 16 | struct SineSynth {
[INFO] [stderr]    |        --------- fields in this struct
[INFO] [stderr] 17 |     playtime: f32,
[INFO] [stderr]    |     ^^^^^^^^
[INFO] [stderr] 18 |     sample_rate: usize
[INFO] [stderr]    |     ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `SquareSynth` is never constructed
[INFO] [stderr]   --> src/main.rs:42:8
[INFO] [stderr]    |
[INFO] [stderr] 42 | struct SquareSynth {
[INFO] [stderr]    |        ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field `sample_rate` is never read
[INFO] [stderr]   --> src/main.rs:81:5
[INFO] [stderr]    |
[INFO] [stderr] 80 | struct GeSynth {
[INFO] [stderr]    |        ------- field in this struct
[INFO] [stderr] 81 |     sample_rate: usize
[INFO] [stderr]    |     ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `gesynth` (bin "gesynth" test) generated 11 warnings (run `cargo fix --bin "gesynth" -p gesynth --tests` to apply 5 suggestions)
[INFO] [stderr] warning: unused dependency `rand`
[INFO] [stderr]  --> Cargo.toml:2:1
[INFO] [stderr]   |
[INFO] [stderr] 2 | rand = "0.8.5"
[INFO] [stderr]   | ^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `cargo::unused_dependencies` is set to `warn` by default
[INFO] [stderr] help: consider removing the dependency on `rand`
[INFO] [stderr] warning: `gesynth` (manifest) generated 1 warning
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.08s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/build/gesynth/e322e8aec1701557/out/gesynth-e322e8aec1701557)
[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] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/build/gesynth/3080382595839a5a/out/gesynth-3080382595839a5a)
[INFO] [stderr]    Doc-tests gesynth
[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] [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" "352ba32d97833ee6c2663a28aa1fe003f93a9a27dbc416a0d0ca7284f5350d51", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "352ba32d97833ee6c2663a28aa1fe003f93a9a27dbc416a0d0ca7284f5350d51", kill_on_drop: false }`
[INFO] [stdout] 352ba32d97833ee6c2663a28aa1fe003f93a9a27dbc416a0d0ca7284f5350d51
