[INFO] cloning repository https://github.com/ArturMarschenkulov/rusty_neural_networks
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ArturMarschenkulov/rusty_neural_networks" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FArturMarschenkulov%2Frusty_neural_networks", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FArturMarschenkulov%2Frusty_neural_networks'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] c916d9b012f9b4a95c5c2cd2bab8ca98742c726d
[INFO] checking ArturMarschenkulov/rusty_neural_networks/c916d9b012f9b4a95c5c2cd2bab8ca98742c726d against master#ab869e094a907cc5d19b4080f22eccaf347f1f95 for pr-129604
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FArturMarschenkulov%2Frusty_neural_networks" "/workspace/builds/worker-3-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ArturMarschenkulov/rusty_neural_networks on toolchain ab869e094a907cc5d19b4080f22eccaf347f1f95
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/ArturMarschenkulov/rusty_neural_networks
[INFO] finished tweaking git repo https://github.com/ArturMarschenkulov/rusty_neural_networks
[INFO] tweaked toml for git repo https://github.com/ArturMarschenkulov/rusty_neural_networks written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/ArturMarschenkulov/rusty_neural_networks 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" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded serde v1.0.150
[INFO] [stderr]   Downloaded matrixmultiply v0.3.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
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[INFO] [stderr]    Compiling libc v0.2.138
[INFO] [stderr]    Compiling num-traits v0.2.15
[INFO] [stderr]    Compiling memchr v2.5.0
[INFO] [stderr]    Compiling serde v1.0.150
[INFO] [stderr]    Compiling num-integer v0.1.45
[INFO] [stderr]     Checking regex-automata v0.1.10
[INFO] [stderr]     Checking ppv-lite86 v0.2.17
[INFO] [stderr]     Checking matrixmultiply v0.3.2
[INFO] [stderr]     Checking itoa v0.4.8
[INFO] [stderr]     Checking ryu v1.0.11
[INFO] [stderr]     Checking getrandom v0.2.8
[INFO] [stderr]     Checking csv-core v0.1.10
[INFO] [stderr]     Checking num-complex v0.4.2
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking ndarray v0.15.6
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking bstr v0.2.17
[INFO] [stderr]     Checking csv v1.1.6
[INFO] [stderr]     Checking rusty_neural_networks v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `previous_layer`
[INFO] [stdout]   --> src/network.rs:17:24
[INFO] [stdout]    |
[INFO] [stdout] 17 |     fn backprop(&self, previous_layer: &Layer) -> Layer {
[INFO] [stdout]    |                        ^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_previous_layer`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `previous_layer`
[INFO] [stdout]   --> src/network.rs:17:24
[INFO] [stdout]    |
[INFO] [stdout] 17 |     fn backprop(&self, previous_layer: &Layer) -> Layer {
[INFO] [stdout]    |                        ^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_previous_layer`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `ss`
[INFO] [stdout]   --> src/main.rs:33:9
[INFO] [stdout]    |
[INFO] [stdout] 33 |     let ss = nd::Array2::<f64>::from_shape_vec((4, 1), vec![1., 2., 3., 4.]).unwrap();
[INFO] [stdout]    |         ^^ help: if this is intentional, prefix it with an underscore: `_ss`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `ss`
[INFO] [stdout]   --> src/main.rs:33:9
[INFO] [stdout]    |
[INFO] [stdout] 33 |     let ss = nd::Array2::<f64>::from_shape_vec((4, 1), vec![1., 2., 3., 4.]).unwrap();
[INFO] [stdout]    |         ^^ help: if this is intentional, prefix it with an underscore: `_ss`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `test_labels`
[INFO] [stdout]   --> src/main.rs:53:9
[INFO] [stdout]    |
[INFO] [stdout] 53 |     let test_labels = data_test.slice(nd::s![0, ..]);
[INFO] [stdout]    |         ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_test_labels`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `test_pixels`
[INFO] [stdout]   --> src/main.rs:55:9
[INFO] [stdout]    |
[INFO] [stdout] 55 |     let test_pixels = test_pixels.map(|x| *x / 255.0);
[INFO] [stdout]    |         ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_test_pixels`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Relu`, `Identity`, `Sigmoid`, and `Tanh` are never constructed
[INFO] [stdout]  --> src/activation.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub enum Activation {
[INFO] [stdout]   |          ---------- variants in this enum
[INFO] [stdout] 5 |     Relu,
[INFO] [stdout]   |     ^^^^
[INFO] [stdout] 6 |     LeakyRelu,
[INFO] [stdout] 7 |     Identity,
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout] 8 |     Sigmoid,
[INFO] [stdout]   |     ^^^^^^^
[INFO] [stdout] 9 |     Tanh,
[INFO] [stdout]   |     ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Activation` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `test_labels`
[INFO] [stdout]   --> src/main.rs:53:9
[INFO] [stdout]    |
[INFO] [stdout] 53 |     let test_labels = data_test.slice(nd::s![0, ..]);
[INFO] [stdout]    |         ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_test_labels`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `test_pixels`
[INFO] [stdout]   --> src/main.rs:55:9
[INFO] [stdout]    |
[INFO] [stdout] 55 |     let test_pixels = test_pixels.map(|x| *x / 255.0);
[INFO] [stdout]    |         ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_test_pixels`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Relu`, `Identity`, `Sigmoid`, and `Tanh` are never constructed
[INFO] [stdout]  --> src/activation.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub enum Activation {
[INFO] [stdout]   |          ---------- variants in this enum
[INFO] [stdout] 5 |     Relu,
[INFO] [stdout]   |     ^^^^
[INFO] [stdout] 6 |     LeakyRelu,
[INFO] [stdout] 7 |     Identity,
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout] 8 |     Sigmoid,
[INFO] [stdout]   |     ^^^^^^^
[INFO] [stdout] 9 |     Tanh,
[INFO] [stdout]   |     ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Activation` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `backprop` is never used
[INFO] [stdout]   --> src/network.rs:17:8
[INFO] [stdout]    |
[INFO] [stdout] 11 | impl Layer {
[INFO] [stdout]    | ---------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 17 |     fn backprop(&self, previous_layer: &Layer) -> Layer {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `layers_num` is never read
[INFO] [stdout]   --> src/network.rs:42:5
[INFO] [stdout]    |
[INFO] [stdout] 41 | pub struct Network {
[INFO] [stdout]    |            ------- field in this struct
[INFO] [stdout] 42 |     layers_num: usize,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `make_prediction` is never used
[INFO] [stdout]    --> src/network.rs:157:12
[INFO] [stdout]     |
[INFO] [stdout] 48  | impl Network {
[INFO] [stdout]     | ------------ method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 157 |     pub fn make_prediction(&self, x: &nd::Array2<f64>) -> nd::Array1<u64> {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `backprop` is never used
[INFO] [stdout]   --> src/network.rs:17:8
[INFO] [stdout]    |
[INFO] [stdout] 11 | impl Layer {
[INFO] [stdout]    | ---------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 17 |     fn backprop(&self, previous_layer: &Layer) -> Layer {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `layers_num` is never read
[INFO] [stdout]   --> src/network.rs:42:5
[INFO] [stdout]    |
[INFO] [stdout] 41 | pub struct Network {
[INFO] [stdout]    |            ------- field in this struct
[INFO] [stdout] 42 |     layers_num: usize,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `make_prediction` is never used
[INFO] [stdout]    --> src/network.rs:157:12
[INFO] [stdout]     |
[INFO] [stdout] 48  | impl Network {
[INFO] [stdout]     | ------------ method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 157 |     pub fn make_prediction(&self, x: &nd::Array2<f64>) -> nd::Array1<u64> {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 10.85s
[INFO] running `Command { std: "docker" "inspect" "544f95af6b0fb2b79856bbe0cb170e7113cca4265042f9bd25f3f398675c53f6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "544f95af6b0fb2b79856bbe0cb170e7113cca4265042f9bd25f3f398675c53f6", kill_on_drop: false }`
[INFO] [stdout] 544f95af6b0fb2b79856bbe0cb170e7113cca4265042f9bd25f3f398675c53f6