[INFO] cloning repository https://github.com/audiodog301/learning
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/audiodog301/learning" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Faudiodog301%2Flearning", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Faudiodog301%2Flearning'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 5e8613f7118f23291f14690f1d7843e5ce2a6d4e
[INFO] testing audiodog301/learning against 1.60.0 for beta-1.61-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Faudiodog301%2Flearning" "/workspace/builds/worker-11/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-11/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/audiodog301/learning on toolchain 1.60.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/audiodog301/learning
[INFO] finished tweaking git repo https://github.com/audiodog301/learning
[INFO] tweaked toml for git repo https://github.com/audiodog301/learning written to /workspace/builds/worker-11/source/Cargo.toml
[INFO] crate git repo https://github.com/audiodog301/learning already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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" "+1.60.0" "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] f76e09a2fb7118c8503a5f322d6d234c5474182de18ece17ebf6c1f57efd37b5
[INFO] running `Command { std: "docker" "start" "-a" "f76e09a2fb7118c8503a5f322d6d234c5474182de18ece17ebf6c1f57efd37b5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f76e09a2fb7118c8503a5f322d6d234c5474182de18ece17ebf6c1f57efd37b5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f76e09a2fb7118c8503a5f322d6d234c5474182de18ece17ebf6c1f57efd37b5", kill_on_drop: false }`
[INFO] [stdout] f76e09a2fb7118c8503a5f322d6d234c5474182de18ece17ebf6c1f57efd37b5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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" "+1.60.0" "build" "--frozen" "--message-format=json", 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] e0c43c8cdcbccf2ac8d5ca14a4e41bc3002c6a6ef85755146a5d24d99ac13af9
[INFO] running `Command { std: "docker" "start" "-a" "e0c43c8cdcbccf2ac8d5ca14a4e41bc3002c6a6ef85755146a5d24d99ac13af9", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.53
[INFO] [stderr]    Compiling smallvec v1.5.0
[INFO] [stderr]    Compiling futures-sink v0.3.8
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[INFO] [stderr]    Compiling either v1.6.1
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[INFO] [stderr]    Compiling typed-arena v2.0.1
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[INFO] [stderr]    Compiling svg_fmt v0.4.1
[INFO] [stderr]    Compiling cpal v0.13.1
[INFO] [stderr]    Compiling anyhow v1.0.34
[INFO] [stderr]    Compiling libloading v0.6.5
[INFO] [stderr]    Compiling wayland-sys v0.28.2
[INFO] [stderr]    Compiling nom v6.0.1
[INFO] [stderr]    Compiling futures-task v0.3.8
[INFO] [stderr]    Compiling servo-fontconfig-sys v4.0.9
[INFO] [stderr]    Compiling x11 v2.18.2
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[INFO] [stderr]    Compiling wayland-client v0.28.2
[INFO] [stderr]    Compiling wayland-protocols v0.28.2
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[INFO] [stderr]    Compiling servo-freetype-sys v4.0.5
[INFO] [stderr]    Compiling expat-sys v2.1.6
[INFO] [stderr]    Compiling xcursor v0.3.3
[INFO] [stderr]    Compiling glyph_brush_layout v0.2.1
[INFO] [stderr]    Compiling gfx-descriptor v0.2.0
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[INFO] [stderr]    Compiling freetype v0.4.1
[INFO] [stderr]    Compiling wayland-commons v0.28.2
[INFO] [stderr]    Compiling calloop v0.6.5
[INFO] [stderr]    Compiling servo-fontconfig v0.4.0
[INFO] [stderr]    Compiling font-kit v0.8.0
[INFO] [stderr]    Compiling glyph_brush_draw_cache v0.1.3
[INFO] [stderr]    Compiling glyph_brush v0.7.0
[INFO] [stderr]    Compiling synstructure v0.12.4
[INFO] [stderr]    Compiling wayland-cursor v0.28.2
[INFO] [stderr]    Compiling pin-project-internal v1.0.2
[INFO] [stderr]    Compiling futures-macro v0.3.8
[INFO] [stderr]    Compiling thiserror-impl v1.0.22
[INFO] [stderr]    Compiling bytemuck_derive v1.0.1
[INFO] [stderr]    Compiling zerocopy-derive v0.2.0
[INFO] [stderr]    Compiling clipboard_x11 v0.1.0
[INFO] [stderr]    Compiling bytemuck v1.4.1
[INFO] [stderr]    Compiling zerocopy v0.3.0
[INFO] [stderr]    Compiling thiserror v1.0.22
[INFO] [stderr]    Compiling pin-project v1.0.2
[INFO] [stderr]    Compiling futures-util v0.3.8
[INFO] [stderr]    Compiling naga v0.2.0
[INFO] [stderr]    Compiling gfx-backend-vulkan v0.6.5
[INFO] [stderr]    Compiling wgpu-core v0.6.5
[INFO] [stderr]    Compiling futures-executor v0.3.8
[INFO] [stderr]    Compiling futures v0.3.8
[INFO] [stderr]    Compiling iced_futures v0.2.0
[INFO] [stderr]    Compiling iced_native v0.3.0
[INFO] [stderr]    Compiling iced_graphics v0.1.0
[INFO] [stderr]    Compiling wgpu v0.6.2
[INFO] [stderr]    Compiling wgpu_glyph v0.10.0
[INFO] [stderr]    Compiling iced_wgpu v0.3.0
[INFO] [stderr]    Compiling smithay-client-toolkit v0.12.0
[INFO] [stderr]    Compiling smithay-clipboard v0.6.1
[INFO] [stderr]    Compiling clipboard_wayland v0.1.2
[INFO] [stderr]    Compiling window_clipboard v0.1.3
[INFO] [stderr]    Compiling iced_winit v0.2.0
[INFO] [stderr]    Compiling iced v0.2.0
[INFO] [stderr]    Compiling learning v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]    --> src/main.rs:164:5
[INFO] [stdout]     |
[INFO] [stdout] 162 |     loop {}
[INFO] [stdout]     |     ------- any code following this expression is unreachable
[INFO] [stdout] 163 | 
[INFO] [stdout] 164 |     Ok(())
[INFO] [stdout]     |     ^^^^^^ unreachable expression
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unreachable_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `sample_rate`
[INFO] [stdout]    --> src/main.rs:141:9
[INFO] [stdout]     |
[INFO] [stdout] 141 |     let sample_rate = config.sample_rate.0 as f32;
[INFO] [stdout]     |         ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_sample_rate`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `set_frequency`
[INFO] [stdout]   --> src/main.rs:16:6
[INFO] [stdout]    |
[INFO] [stdout] 16 |   fn set_frequency(&mut self, freq: &f32) {
[INFO] [stdout]    |      ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Voice`
[INFO] [stdout]   --> src/main.rs:39:8
[INFO] [stdout]    |
[INFO] [stdout] 39 | struct Voice {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `note_on`
[INFO] [stdout]   --> src/main.rs:46:8
[INFO] [stdout]    |
[INFO] [stdout] 46 |     fn note_on(&mut self) {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `note_off`
[INFO] [stdout]   --> src/main.rs:49:8
[INFO] [stdout]    |
[INFO] [stdout] 49 |     fn note_off(&mut self) {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `set_freq`
[INFO] [stdout]   --> src/main.rs:52:8
[INFO] [stdout]    |
[INFO] [stdout] 52 |     fn set_freq(&mut self, freq: &f32) {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Poly`
[INFO] [stdout]   --> src/main.rs:58:8
[INFO] [stdout]    |
[INFO] [stdout] 58 | struct Poly {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `next_sample`
[INFO] [stdout]   --> src/main.rs:66:8
[INFO] [stdout]    |
[INFO] [stdout] 66 |     fn next_sample(&mut self) -> f32 {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new_note`
[INFO] [stdout]   --> src/main.rs:73:8
[INFO] [stdout]    |
[INFO] [stdout] 73 |     fn new_note(&mut self, frequency: &f32) {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 10 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4m 30s
[INFO] running `Command { std: "docker" "inspect" "e0c43c8cdcbccf2ac8d5ca14a4e41bc3002c6a6ef85755146a5d24d99ac13af9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e0c43c8cdcbccf2ac8d5ca14a4e41bc3002c6a6ef85755146a5d24d99ac13af9", kill_on_drop: false }`
[INFO] [stdout] e0c43c8cdcbccf2ac8d5ca14a4e41bc3002c6a6ef85755146a5d24d99ac13af9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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" "+1.60.0" "test" "--frozen" "--no-run" "--message-format=json", 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] 8837d097a365d04bf088d1d4f89fd4bb290d7d8bbebd47ba9ad11f33c4a8b570
[INFO] running `Command { std: "docker" "start" "-a" "8837d097a365d04bf088d1d4f89fd4bb290d7d8bbebd47ba9ad11f33c4a8b570", kill_on_drop: false }`
[INFO] [stderr]    Compiling learning v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]    --> src/main.rs:164:5
[INFO] [stdout]     |
[INFO] [stdout] 162 |     loop {}
[INFO] [stdout]     |     ------- any code following this expression is unreachable
[INFO] [stdout] 163 | 
[INFO] [stdout] 164 |     Ok(())
[INFO] [stdout]     |     ^^^^^^ unreachable expression
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unreachable_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `sample_rate`
[INFO] [stdout]    --> src/main.rs:141:9
[INFO] [stdout]     |
[INFO] [stdout] 141 |     let sample_rate = config.sample_rate.0 as f32;
[INFO] [stdout]     |         ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_sample_rate`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `set_frequency`
[INFO] [stdout]   --> src/main.rs:16:6
[INFO] [stdout]    |
[INFO] [stdout] 16 |   fn set_frequency(&mut self, freq: &f32) {
[INFO] [stdout]    |      ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Voice`
[INFO] [stdout]   --> src/main.rs:39:8
[INFO] [stdout]    |
[INFO] [stdout] 39 | struct Voice {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `note_on`
[INFO] [stdout]   --> src/main.rs:46:8
[INFO] [stdout]    |
[INFO] [stdout] 46 |     fn note_on(&mut self) {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `note_off`
[INFO] [stdout]   --> src/main.rs:49:8
[INFO] [stdout]    |
[INFO] [stdout] 49 |     fn note_off(&mut self) {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `set_freq`
[INFO] [stdout]   --> src/main.rs:52:8
[INFO] [stdout]    |
[INFO] [stdout] 52 |     fn set_freq(&mut self, freq: &f32) {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Poly`
[INFO] [stdout]   --> src/main.rs:58:8
[INFO] [stdout]    |
[INFO] [stdout] 58 | struct Poly {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `next_sample`
[INFO] [stdout]   --> src/main.rs:66:8
[INFO] [stdout]    |
[INFO] [stdout] 66 |     fn next_sample(&mut self) -> f32 {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new_note`
[INFO] [stdout]   --> src/main.rs:73:8
[INFO] [stdout]    |
[INFO] [stdout] 73 |     fn new_note(&mut self, frequency: &f32) {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 10 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 2.41s
[INFO] running `Command { std: "docker" "inspect" "8837d097a365d04bf088d1d4f89fd4bb290d7d8bbebd47ba9ad11f33c4a8b570", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8837d097a365d04bf088d1d4f89fd4bb290d7d8bbebd47ba9ad11f33c4a8b570", kill_on_drop: false }`
[INFO] [stdout] 8837d097a365d04bf088d1d4f89fd4bb290d7d8bbebd47ba9ad11f33c4a8b570
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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" "+1.60.0" "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] 845d2df8cd5e12065238b32af13d2d4b83035046466dde5a47d07a5891798371
[INFO] running `Command { std: "docker" "start" "-a" "845d2df8cd5e12065238b32af13d2d4b83035046466dde5a47d07a5891798371", kill_on_drop: false }`
[INFO] [stderr] warning: unreachable expression
[INFO] [stderr]    --> src/main.rs:164:5
[INFO] [stderr]     |
[INFO] [stderr] 162 |     loop {}
[INFO] [stderr]     |     ------- any code following this expression is unreachable
[INFO] [stderr] 163 | 
[INFO] [stderr] 164 |     Ok(())
[INFO] [stderr]     |     ^^^^^^ unreachable expression
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unreachable_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `sample_rate`
[INFO] [stderr]    --> src/main.rs:141:9
[INFO] [stderr]     |
[INFO] [stderr] 141 |     let sample_rate = config.sample_rate.0 as f32;
[INFO] [stderr]     |         ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_sample_rate`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `set_frequency`
[INFO] [stderr]   --> src/main.rs:16:6
[INFO] [stderr]    |
[INFO] [stderr] 16 |   fn set_frequency(&mut self, freq: &f32) {
[INFO] [stderr]    |      ^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Voice`
[INFO] [stderr]   --> src/main.rs:39:8
[INFO] [stderr]    |
[INFO] [stderr] 39 | struct Voice {
[INFO] [stderr]    |        ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `note_on`
[INFO] [stderr]   --> src/main.rs:46:8
[INFO] [stderr]    |
[INFO] [stderr] 46 |     fn note_on(&mut self) {
[INFO] [stderr]    |        ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `note_off`
[INFO] [stderr]   --> src/main.rs:49:8
[INFO] [stderr]    |
[INFO] [stderr] 49 |     fn note_off(&mut self) {
[INFO] [stderr]    |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `set_freq`
[INFO] [stderr]   --> src/main.rs:52:8
[INFO] [stderr]    |
[INFO] [stderr] 52 |     fn set_freq(&mut self, freq: &f32) {
[INFO] [stderr]    |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Poly`
[INFO] [stderr]   --> src/main.rs:58:8
[INFO] [stderr]    |
[INFO] [stderr] 58 | struct Poly {
[INFO] [stderr]    |        ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `next_sample`
[INFO] [stderr]   --> src/main.rs:66:8
[INFO] [stderr]    |
[INFO] [stderr] 66 |     fn next_sample(&mut self) -> f32 {
[INFO] [stderr]    |        ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `new_note`
[INFO] [stderr]   --> src/main.rs:73:8
[INFO] [stderr]    |
[INFO] [stderr] 73 |     fn new_note(&mut self, frequency: &f32) {
[INFO] [stderr]    |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `learning` (bin "learning" test) generated 10 warnings
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.34s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/learning-108526452bba5282)
[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" "845d2df8cd5e12065238b32af13d2d4b83035046466dde5a47d07a5891798371", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "845d2df8cd5e12065238b32af13d2d4b83035046466dde5a47d07a5891798371", kill_on_drop: false }`
[INFO] [stdout] 845d2df8cd5e12065238b32af13d2d4b83035046466dde5a47d07a5891798371