[INFO] cloning repository https://github.com/loboyd/nn-from-scratch-in-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/loboyd/nn-from-scratch-in-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Floboyd%2Fnn-from-scratch-in-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Floboyd%2Fnn-from-scratch-in-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e4ab62e401d54ce74d0cee6ccc16a6b8af9ba222
[INFO] testing loboyd/nn-from-scratch-in-rust against try#8de4c7234dd9b97c9d76b58671343fdbbc9a433e+target=x86_64-unknown-linux-musl for musl_upgrade_1_2_5_with_getrandom_patch_0
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Floboyd%2Fnn-from-scratch-in-rust" "/workspace/builds/worker-5-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/loboyd/nn-from-scratch-in-rust
[INFO] finished tweaking git repo https://github.com/loboyd/nn-from-scratch-in-rust
[INFO] tweaked toml for git repo https://github.com/loboyd/nn-from-scratch-in-rust written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/loboyd/nn-from-scratch-in-rust on toolchain 8de4c7234dd9b97c9d76b58671343fdbbc9a433e
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/loboyd/nn-from-scratch-in-rust 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" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 9a1d3d30790d45747411bff424546e33defd1113ca0efaa652300dc0f29c8230
[INFO] running `Command { std: "docker" "start" "-a" "9a1d3d30790d45747411bff424546e33defd1113ca0efaa652300dc0f29c8230", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9a1d3d30790d45747411bff424546e33defd1113ca0efaa652300dc0f29c8230", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9a1d3d30790d45747411bff424546e33defd1113ca0efaa652300dc0f29c8230", kill_on_drop: false }`
[INFO] [stdout] 9a1d3d30790d45747411bff424546e33defd1113ca0efaa652300dc0f29c8230
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "build" "--frozen" "--message-format=json" "--target" "x86_64-unknown-linux-musl", kill_on_drop: false }`
[INFO] [stdout] b4ae380aa2a346e82172db96485da12bce349810b05106a363ac64f92781b1b4
[INFO] running `Command { std: "docker" "start" "-a" "b4ae380aa2a346e82172db96485da12bce349810b05106a363ac64f92781b1b4", kill_on_drop: false }`
[INFO] [stderr]    Compiling nn v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `output`
[INFO] [stdout]   --> src/perceptron.rs:89:13
[INFO] [stdout]    |
[INFO] [stdout] 89 |         let output = self.feed_forward_train(&mut training_cache, input);
[INFO] [stdout]    |             ^^^^^^ help: if this is intentional, prefix it with an underscore: `_output`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `last_layer_error`
[INFO] [stdout]    --> src/perceptron.rs:106:13
[INFO] [stdout]     |
[INFO] [stdout] 106 |         let last_layer_error = grad_cost_wrt_last_layer_activation
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_last_layer_error`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `label`
[INFO] [stdout]   --> src/perceptron.rs:84:42
[INFO] [stdout]    |
[INFO] [stdout] 84 |     fn grad(&mut self, input: &Vec<f32>, label: Vec<f32>) {
[INFO] [stdout]    |                                          ^^^^^ help: if this is intentional, prefix it with an underscore: `_label`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `n_inputs`, `n_outputs`, and `n_layers` are never read
[INFO] [stdout]  --> src/perceptron.rs:6:9
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub struct Perceptron {
[INFO] [stdout]   |            ---------- fields in this struct
[INFO] [stdout] 6 |     pub n_inputs: usize,
[INFO] [stdout]   |         ^^^^^^^^
[INFO] [stdout] 7 |     pub n_outputs: usize,
[INFO] [stdout]   |         ^^^^^^^^^
[INFO] [stdout] 8 |     pub layers: Vec<Matrix>,
[INFO] [stdout] 9 |     n_layers: usize,
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Perceptron` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `TrainingCache` is never constructed
[INFO] [stdout]   --> src/perceptron.rs:13:8
[INFO] [stdout]    |
[INFO] [stdout] 13 | struct TrainingCache(Vec<LayerTrainingCache>);
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `TrainingCache` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `LayerTrainingCache` is never constructed
[INFO] [stdout]   --> src/perceptron.rs:16:8
[INFO] [stdout]    |
[INFO] [stdout] 16 | struct LayerTrainingCache {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `LayerTrainingCache` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `feed_forward_train`, `cost`, `grad_cost_last_layer`, and `grad` are never used
[INFO] [stdout]   --> src/perceptron.rs:47:8
[INFO] [stdout]    |
[INFO] [stdout] 21 | impl Perceptron {
[INFO] [stdout]    | --------------- associated items in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 47 |     fn feed_forward_train(&self, training_cache: &mut TrainingCache, input: &Vec<f32>) -> Vec<f32> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 71 |     fn cost(&self, input: &Vec<f32>, label: Vec<f32>) -> f32 {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 80 |     fn grad_cost_last_layer(input: f32, last_layer_activation: f32) -> f32 {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 84 |     fn grad(&mut self, input: &Vec<f32>, label: Vec<f32>) {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `sigmoid_derivative` is never used
[INFO] [stdout]  --> src/utils.rs:5:8
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub fn sigmoid_derivative(x: f32) -> f32 {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `sigmoid_derivative_vector` is never used
[INFO] [stdout]  --> src/utils.rs:9:8
[INFO] [stdout]   |
[INFO] [stdout] 9 | pub fn sigmoid_derivative_vector(x: &Vec<f32>) -> Vec<f32> {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.47s
[INFO] running `Command { std: "docker" "inspect" "b4ae380aa2a346e82172db96485da12bce349810b05106a363ac64f92781b1b4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b4ae380aa2a346e82172db96485da12bce349810b05106a363ac64f92781b1b4", kill_on_drop: false }`
[INFO] [stdout] b4ae380aa2a346e82172db96485da12bce349810b05106a363ac64f92781b1b4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "test" "--frozen" "--no-run" "--message-format=json" "--target" "x86_64-unknown-linux-musl", kill_on_drop: false }`
[INFO] [stdout] 6b95c70a4329bc2c2d9f53fbc9e323a76ca807a6a398623517b1da2cd9b4885e
[INFO] running `Command { std: "docker" "start" "-a" "6b95c70a4329bc2c2d9f53fbc9e323a76ca807a6a398623517b1da2cd9b4885e", kill_on_drop: false }`
[INFO] [stderr]    Compiling nn v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `output`
[INFO] [stdout]   --> src/perceptron.rs:89:13
[INFO] [stdout]    |
[INFO] [stdout] 89 |         let output = self.feed_forward_train(&mut training_cache, input);
[INFO] [stdout]    |             ^^^^^^ help: if this is intentional, prefix it with an underscore: `_output`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `last_layer_error`
[INFO] [stdout]    --> src/perceptron.rs:106:13
[INFO] [stdout]     |
[INFO] [stdout] 106 |         let last_layer_error = grad_cost_wrt_last_layer_activation
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_last_layer_error`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `label`
[INFO] [stdout]   --> src/perceptron.rs:84:42
[INFO] [stdout]    |
[INFO] [stdout] 84 |     fn grad(&mut self, input: &Vec<f32>, label: Vec<f32>) {
[INFO] [stdout]    |                                          ^^^^^ help: if this is intentional, prefix it with an underscore: `_label`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `n_inputs`, `n_outputs`, and `n_layers` are never read
[INFO] [stdout]  --> src/perceptron.rs:6:9
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub struct Perceptron {
[INFO] [stdout]   |            ---------- fields in this struct
[INFO] [stdout] 6 |     pub n_inputs: usize,
[INFO] [stdout]   |         ^^^^^^^^
[INFO] [stdout] 7 |     pub n_outputs: usize,
[INFO] [stdout]   |         ^^^^^^^^^
[INFO] [stdout] 8 |     pub layers: Vec<Matrix>,
[INFO] [stdout] 9 |     n_layers: usize,
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Perceptron` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `TrainingCache` is never constructed
[INFO] [stdout]   --> src/perceptron.rs:13:8
[INFO] [stdout]    |
[INFO] [stdout] 13 | struct TrainingCache(Vec<LayerTrainingCache>);
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `TrainingCache` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `LayerTrainingCache` is never constructed
[INFO] [stdout]   --> src/perceptron.rs:16:8
[INFO] [stdout]    |
[INFO] [stdout] 16 | struct LayerTrainingCache {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `LayerTrainingCache` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `feed_forward_train`, `cost`, `grad_cost_last_layer`, and `grad` are never used
[INFO] [stdout]   --> src/perceptron.rs:47:8
[INFO] [stdout]    |
[INFO] [stdout] 21 | impl Perceptron {
[INFO] [stdout]    | --------------- associated items in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 47 |     fn feed_forward_train(&self, training_cache: &mut TrainingCache, input: &Vec<f32>) -> Vec<f32> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 71 |     fn cost(&self, input: &Vec<f32>, label: Vec<f32>) -> f32 {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 80 |     fn grad_cost_last_layer(input: f32, last_layer_activation: f32) -> f32 {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 84 |     fn grad(&mut self, input: &Vec<f32>, label: Vec<f32>) {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `sigmoid_derivative_vector` is never used
[INFO] [stdout]  --> src/utils.rs:9:8
[INFO] [stdout]   |
[INFO] [stdout] 9 | pub fn sigmoid_derivative_vector(x: &Vec<f32>) -> Vec<f32> {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.58s
[INFO] running `Command { std: "docker" "inspect" "6b95c70a4329bc2c2d9f53fbc9e323a76ca807a6a398623517b1da2cd9b4885e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6b95c70a4329bc2c2d9f53fbc9e323a76ca807a6a398623517b1da2cd9b4885e", kill_on_drop: false }`
[INFO] [stdout] 6b95c70a4329bc2c2d9f53fbc9e323a76ca807a6a398623517b1da2cd9b4885e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "test" "--frozen" "--target" "x86_64-unknown-linux-musl", kill_on_drop: false }`
[INFO] [stdout] e15eaa373a3d238337953329068e2e27b108feb5d7aaba29580975ad5cfd8d8d
[INFO] running `Command { std: "docker" "start" "-a" "e15eaa373a3d238337953329068e2e27b108feb5d7aaba29580975ad5cfd8d8d", kill_on_drop: false }`
[INFO] [stderr] warning: unused variable: `output`
[INFO] [stderr]   --> src/perceptron.rs:89:13
[INFO] [stderr]    |
[INFO] [stderr] 89 |         let output = self.feed_forward_train(&mut training_cache, input);
[INFO] [stderr]    |             ^^^^^^ help: if this is intentional, prefix it with an underscore: `_output`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `last_layer_error`
[INFO] [stderr]    --> src/perceptron.rs:106:13
[INFO] [stderr]     |
[INFO] [stderr] 106 |         let last_layer_error = grad_cost_wrt_last_layer_activation
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_last_layer_error`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `label`
[INFO] [stderr]   --> src/perceptron.rs:84:42
[INFO] [stderr]    |
[INFO] [stderr] 84 |     fn grad(&mut self, input: &Vec<f32>, label: Vec<f32>) {
[INFO] [stderr]    |                                          ^^^^^ help: if this is intentional, prefix it with an underscore: `_label`
[INFO] [stderr] 
[INFO] [stderr] warning: fields `n_inputs`, `n_outputs`, and `n_layers` are never read
[INFO] [stderr]  --> src/perceptron.rs:6:9
[INFO] [stderr]   |
[INFO] [stderr] 5 | pub struct Perceptron {
[INFO] [stderr]   |            ---------- fields in this struct
[INFO] [stderr] 6 |     pub n_inputs: usize,
[INFO] [stderr]   |         ^^^^^^^^
[INFO] [stderr] 7 |     pub n_outputs: usize,
[INFO] [stderr]   |         ^^^^^^^^^
[INFO] [stderr] 8 |     pub layers: Vec<Matrix>,
[INFO] [stderr] 9 |     n_layers: usize,
[INFO] [stderr]   |     ^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `Perceptron` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: struct `TrainingCache` is never constructed
[INFO] [stderr]   --> src/perceptron.rs:13:8
[INFO] [stderr]    |
[INFO] [stderr] 13 | struct TrainingCache(Vec<LayerTrainingCache>);
[INFO] [stderr]    |        ^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `TrainingCache` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr] 
[INFO] [stderr] warning: struct `LayerTrainingCache` is never constructed
[INFO] [stderr]   --> src/perceptron.rs:16:8
[INFO] [stderr]    |
[INFO] [stderr] 16 | struct LayerTrainingCache {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `LayerTrainingCache` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr] 
[INFO] [stderr] warning: associated items `feed_forward_train`, `cost`, `grad_cost_last_layer`, and `grad` are never used
[INFO] [stderr]   --> src/perceptron.rs:47:8
[INFO] [stderr]    |
[INFO] [stderr] 21 | impl Perceptron {
[INFO] [stderr]    | --------------- associated items in this implementation
[INFO] [stderr] ...
[INFO] [stderr] 47 |     fn feed_forward_train(&self, training_cache: &mut TrainingCache, input: &Vec<f32>) -> Vec<f32> {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 71 |     fn cost(&self, input: &Vec<f32>, label: Vec<f32>) -> f32 {
[INFO] [stderr]    |        ^^^^
[INFO] [stderr] ...
[INFO] [stderr] 80 |     fn grad_cost_last_layer(input: f32, last_layer_activation: f32) -> f32 {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 84 |     fn grad(&mut self, input: &Vec<f32>, label: Vec<f32>) {
[INFO] [stderr]    |        ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `sigmoid_derivative_vector` is never used
[INFO] [stderr]  --> src/utils.rs:9:8
[INFO] [stderr]   |
[INFO] [stderr] 9 | pub fn sigmoid_derivative_vector(x: &Vec<f32>) -> Vec<f32> {
[INFO] [stderr]   |        ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `nn` (bin "nn" test) generated 8 warnings
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/x86_64-unknown-linux-musl/debug/deps/nn-e898300ed1fe9c17)
[INFO] [stdout] 
[INFO] [stdout] running 7 tests
[INFO] [stdout] test utils::sigmoid_derivative_0_0point5 ... ok
[INFO] [stdout] test utils::sigmoid_singleton_0_0point5 ... ok
[INFO] [stdout] test matrix::matrix_transpose_check ... ok
[INFO] [stdout] test utils::sigmoid_singleton_999_1 ... ok
[INFO] [stdout] test utils::sigmoid_singleton_neg999_0 ... ok
[INFO] [stdout] test utils::sigmoid_derivative_neg999_0 ... ok
[INFO] [stdout] test utils::sigmoid_derivative_999_0 ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 7 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "e15eaa373a3d238337953329068e2e27b108feb5d7aaba29580975ad5cfd8d8d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e15eaa373a3d238337953329068e2e27b108feb5d7aaba29580975ad5cfd8d8d", kill_on_drop: false }`
[INFO] [stdout] e15eaa373a3d238337953329068e2e27b108feb5d7aaba29580975ad5cfd8d8d