[INFO] updating cached repository tinrab/rusty-neuron
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/tinrab/rusty-neuron
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/tinrab/rusty-neuron" "work/ex/beta-1.37-6/sources/1.36.0/gh/tinrab/rusty-neuron"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/tinrab/rusty-neuron'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/tinrab/rusty-neuron" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/tinrab/rusty-neuron"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/tinrab/rusty-neuron'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 355d4dc7bcf2c24bdd3e52c4e36650b0db23f5a8
[INFO] sha for GitHub repo tinrab/rusty-neuron: 355d4dc7bcf2c24bdd3e52c4e36650b0db23f5a8
[INFO] validating manifest of tinrab/rusty-neuron on toolchain 1.36.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of tinrab/rusty-neuron on toolchain beta-2019-07-23
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing tinrab/rusty-neuron
[INFO] finished frobbing tinrab/rusty-neuron
[INFO] frobbed toml for tinrab/rusty-neuron written to work/ex/beta-1.37-6/sources/1.36.0/gh/tinrab/rusty-neuron/Cargo.toml
[INFO] started frobbing tinrab/rusty-neuron
[INFO] finished frobbing tinrab/rusty-neuron
[INFO] frobbed toml for tinrab/rusty-neuron written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/tinrab/rusty-neuron/Cargo.toml
[INFO] crate tinrab/rusty-neuron already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing tinrab/rusty-neuron against 1.36.0 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-5/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/tinrab/rusty-neuron:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+1.36.0" "build" "--frozen"`
[INFO] [stdout] 13d1233f37cae2a61ed09e5919ef2a49bc6fb60e5d336097377b60c12e0acd0b
[INFO] running `"docker" "start" "-a" "13d1233f37cae2a61ed09e5919ef2a49bc6fb60e5d336097377b60c12e0acd0b"`
[INFO] [stderr]    Compiling rusty-neuron v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `activation::*`
[INFO] [stderr]  --> src/synapse.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use activation::*;
[INFO] [stderr]   |     ^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `activation::*`
[INFO] [stderr]  --> src/network.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use activation::*;
[INFO] [stderr]   |     ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `error::*`
[INFO] [stderr]  --> src/network.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use error::*;
[INFO] [stderr]   |     ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `regularization::*`
[INFO] [stderr]  --> src/network.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use regularization::*;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `neuron::*`
[INFO] [stderr]  --> src/network.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use neuron::*;
[INFO] [stderr]   |     ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `x`
[INFO] [stderr]   --> src/activation.rs:13:23
[INFO] [stderr]    |
[INFO] [stderr] 13 |     fn derivative(&self, x: f64) -> f64 {
[INFO] [stderr]    |                          ^ help: consider prefixing with an underscore: `_x`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `structure`
[INFO] [stderr]  --> src/network.rs:9:13
[INFO] [stderr]   |
[INFO] [stderr] 9 |     pub fn new(structure: &[u32]) -> Network {
[INFO] [stderr]   |                ^^^^^^^^^ help: consider prefixing with an underscore: `_structure`
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `ReLUActivationFunction`
[INFO] [stderr]   --> src/activation.rs:18:1
[INFO] [stderr]    |
[INFO] [stderr] 18 | pub struct ReLUActivationFunction {}
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `SigmoidActivationFunction`
[INFO] [stderr]   --> src/activation.rs:34:1
[INFO] [stderr]    |
[INFO] [stderr] 34 | pub struct SigmoidActivationFunction {}
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `TanhActivationFunction`
[INFO] [stderr]   --> src/activation.rs:47:1
[INFO] [stderr]    |
[INFO] [stderr] 47 | pub struct TanhActivationFunction {}
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `SquareErrorFunction`
[INFO] [stderr]  --> src/error.rs:6:1
[INFO] [stderr]   |
[INFO] [stderr] 6 | pub struct SquareErrorFunction {}
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `L1RegularizationFunction`
[INFO] [stderr]  --> src/regularization.rs:6:1
[INFO] [stderr]   |
[INFO] [stderr] 6 | pub struct L1RegularizationFunction {}
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `L2RegularizationFunction`
[INFO] [stderr]   --> src/regularization.rs:18:1
[INFO] [stderr]    |
[INFO] [stderr] 18 | pub struct L2RegularizationFunction {}
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `activation`
[INFO] [stderr]  --> src/neuron.rs:4:2
[INFO] [stderr]   |
[INFO] [stderr] 4 |     activation: Box<ActivationFunction>,
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `bias`
[INFO] [stderr]  --> src/neuron.rs:5:2
[INFO] [stderr]   |
[INFO] [stderr] 5 |     bias: f64,
[INFO] [stderr]   |     ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `input`
[INFO] [stderr]  --> src/neuron.rs:6:2
[INFO] [stderr]   |
[INFO] [stderr] 6 |     input: f64,
[INFO] [stderr]   |     ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `output`
[INFO] [stderr]  --> src/neuron.rs:7:2
[INFO] [stderr]   |
[INFO] [stderr] 7 |     output: f64,
[INFO] [stderr]   |     ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `output_derivative`
[INFO] [stderr]  --> src/neuron.rs:8:2
[INFO] [stderr]   |
[INFO] [stderr] 8 |     output_derivative: f64,
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `input_derivative`
[INFO] [stderr]  --> src/neuron.rs:9:2
[INFO] [stderr]   |
[INFO] [stderr] 9 |     input_derivative: f64,
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `input_derivative_sum`
[INFO] [stderr]   --> src/neuron.rs:10:2
[INFO] [stderr]    |
[INFO] [stderr] 10 |     input_derivative_sum: f64,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `input_derivative_count`
[INFO] [stderr]   --> src/neuron.rs:11:2
[INFO] [stderr]    |
[INFO] [stderr] 11 |     input_derivative_count: u32,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/neuron.rs:30:2
[INFO] [stderr]    |
[INFO] [stderr] 30 |     pub fn new(activation: Box<ActivationFunction>) -> Self {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `reset`
[INFO] [stderr]   --> src/neuron.rs:37:2
[INFO] [stderr]    |
[INFO] [stderr] 37 |     pub fn reset(&mut self) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `update`
[INFO] [stderr]   --> src/neuron.rs:41:2
[INFO] [stderr]    |
[INFO] [stderr] 41 |     pub fn update(&mut self) -> f64 {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Synapse`
[INFO] [stderr]  --> src/synapse.rs:6:1
[INFO] [stderr]   |
[INFO] [stderr] 6 | pub struct Synapse<'a> {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/synapse.rs:17:2
[INFO] [stderr]    |
[INFO] [stderr] 17 |     pub fn new(source: &'a Neuron, target: &'a Neuron, regularization: Box<RegularizationFunction>) -> Self {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Network`
[INFO] [stderr]  --> src/network.rs:6:1
[INFO] [stderr]   |
[INFO] [stderr] 6 | pub struct Network {}
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]  --> src/network.rs:9:2
[INFO] [stderr]   |
[INFO] [stderr] 9 |     pub fn new(structure: &[u32]) -> Network {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.62s
[INFO] running `"docker" "inspect" "13d1233f37cae2a61ed09e5919ef2a49bc6fb60e5d336097377b60c12e0acd0b"`
[INFO] running `"docker" "rm" "-f" "13d1233f37cae2a61ed09e5919ef2a49bc6fb60e5d336097377b60c12e0acd0b"`
[INFO] [stdout] 13d1233f37cae2a61ed09e5919ef2a49bc6fb60e5d336097377b60c12e0acd0b
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-5/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/tinrab/rusty-neuron:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+1.36.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] 335a72db03cd73877e9c0342d6297c75069f8ec17d32298748e36e2785e7ee60
[INFO] running `"docker" "start" "-a" "335a72db03cd73877e9c0342d6297c75069f8ec17d32298748e36e2785e7ee60"`
[INFO] [stderr]    Compiling rusty-neuron v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `activation::*`
[INFO] [stderr]  --> src/synapse.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use activation::*;
[INFO] [stderr]   |     ^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `activation::*`
[INFO] [stderr]  --> src/network.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use activation::*;
[INFO] [stderr]   |     ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `error::*`
[INFO] [stderr]  --> src/network.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use error::*;
[INFO] [stderr]   |     ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `regularization::*`
[INFO] [stderr]  --> src/network.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use regularization::*;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `neuron::*`
[INFO] [stderr]  --> src/network.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use neuron::*;
[INFO] [stderr]   |     ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `super::*`
[INFO] [stderr]   --> src/network.rs:16:6
[INFO] [stderr]    |
[INFO] [stderr] 16 |     use super::*;
[INFO] [stderr]    |         ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `x`
[INFO] [stderr]   --> src/activation.rs:13:23
[INFO] [stderr]    |
[INFO] [stderr] 13 |     fn derivative(&self, x: f64) -> f64 {
[INFO] [stderr]    |                          ^ help: consider prefixing with an underscore: `_x`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `structure`
[INFO] [stderr]  --> src/network.rs:9:13
[INFO] [stderr]   |
[INFO] [stderr] 9 |     pub fn new(structure: &[u32]) -> Network {
[INFO] [stderr]   |                ^^^^^^^^^ help: consider prefixing with an underscore: `_structure`
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `ReLUActivationFunction`
[INFO] [stderr]   --> src/activation.rs:18:1
[INFO] [stderr]    |
[INFO] [stderr] 18 | pub struct ReLUActivationFunction {}
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `SigmoidActivationFunction`
[INFO] [stderr]   --> src/activation.rs:34:1
[INFO] [stderr]    |
[INFO] [stderr] 34 | pub struct SigmoidActivationFunction {}
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `TanhActivationFunction`
[INFO] [stderr]   --> src/activation.rs:47:1
[INFO] [stderr]    |
[INFO] [stderr] 47 | pub struct TanhActivationFunction {}
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `SquareErrorFunction`
[INFO] [stderr]  --> src/error.rs:6:1
[INFO] [stderr]   |
[INFO] [stderr] 6 | pub struct SquareErrorFunction {}
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `L1RegularizationFunction`
[INFO] [stderr]  --> src/regularization.rs:6:1
[INFO] [stderr]   |
[INFO] [stderr] 6 | pub struct L1RegularizationFunction {}
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `L2RegularizationFunction`
[INFO] [stderr]   --> src/regularization.rs:18:1
[INFO] [stderr]    |
[INFO] [stderr] 18 | pub struct L2RegularizationFunction {}
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `activation`
[INFO] [stderr]  --> src/neuron.rs:4:2
[INFO] [stderr]   |
[INFO] [stderr] 4 |     activation: Box<ActivationFunction>,
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `bias`
[INFO] [stderr]  --> src/neuron.rs:5:2
[INFO] [stderr]   |
[INFO] [stderr] 5 |     bias: f64,
[INFO] [stderr]   |     ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `input`
[INFO] [stderr]  --> src/neuron.rs:6:2
[INFO] [stderr]   |
[INFO] [stderr] 6 |     input: f64,
[INFO] [stderr]   |     ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `output`
[INFO] [stderr]  --> src/neuron.rs:7:2
[INFO] [stderr]   |
[INFO] [stderr] 7 |     output: f64,
[INFO] [stderr]   |     ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `output_derivative`
[INFO] [stderr]  --> src/neuron.rs:8:2
[INFO] [stderr]   |
[INFO] [stderr] 8 |     output_derivative: f64,
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `input_derivative`
[INFO] [stderr]  --> src/neuron.rs:9:2
[INFO] [stderr]   |
[INFO] [stderr] 9 |     input_derivative: f64,
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `input_derivative_sum`
[INFO] [stderr]   --> src/neuron.rs:10:2
[INFO] [stderr]    |
[INFO] [stderr] 10 |     input_derivative_sum: f64,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `input_derivative_count`
[INFO] [stderr]   --> src/neuron.rs:11:2
[INFO] [stderr]    |
[INFO] [stderr] 11 |     input_derivative_count: u32,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/neuron.rs:30:2
[INFO] [stderr]    |
[INFO] [stderr] 30 |     pub fn new(activation: Box<ActivationFunction>) -> Self {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `reset`
[INFO] [stderr]   --> src/neuron.rs:37:2
[INFO] [stderr]    |
[INFO] [stderr] 37 |     pub fn reset(&mut self) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `update`
[INFO] [stderr]   --> src/neuron.rs:41:2
[INFO] [stderr]    |
[INFO] [stderr] 41 |     pub fn update(&mut self) -> f64 {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Synapse`
[INFO] [stderr]  --> src/synapse.rs:6:1
[INFO] [stderr]   |
[INFO] [stderr] 6 | pub struct Synapse<'a> {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/synapse.rs:17:2
[INFO] [stderr]    |
[INFO] [stderr] 17 |     pub fn new(source: &'a Neuron, target: &'a Neuron, regularization: Box<RegularizationFunction>) -> Self {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Network`
[INFO] [stderr]  --> src/network.rs:6:1
[INFO] [stderr]   |
[INFO] [stderr] 6 | pub struct Network {}
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]  --> src/network.rs:9:2
[INFO] [stderr]   |
[INFO] [stderr] 9 |     pub fn new(structure: &[u32]) -> Network {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.96s
[INFO] running `"docker" "inspect" "335a72db03cd73877e9c0342d6297c75069f8ec17d32298748e36e2785e7ee60"`
[INFO] running `"docker" "rm" "-f" "335a72db03cd73877e9c0342d6297c75069f8ec17d32298748e36e2785e7ee60"`
[INFO] [stdout] 335a72db03cd73877e9c0342d6297c75069f8ec17d32298748e36e2785e7ee60
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-5/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/tinrab/rusty-neuron:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+1.36.0" "test" "--frozen"`
[INFO] [stdout] 7d2ea10d1c18d4cce8026cf9648ef50d909d84c5baef21e6d6262f6a30811985
[INFO] running `"docker" "start" "-a" "7d2ea10d1c18d4cce8026cf9648ef50d909d84c5baef21e6d6262f6a30811985"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/rusty_neuron-e43dd92c3f200c0c
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test network::tests::network ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests rusty-neuron
[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
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "7d2ea10d1c18d4cce8026cf9648ef50d909d84c5baef21e6d6262f6a30811985"`
[INFO] running `"docker" "rm" "-f" "7d2ea10d1c18d4cce8026cf9648ef50d909d84c5baef21e6d6262f6a30811985"`
[INFO] [stdout] 7d2ea10d1c18d4cce8026cf9648ef50d909d84c5baef21e6d6262f6a30811985