[INFO] updating cached repository fudini/neurust
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/fudini/neurust
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/fudini/neurust" "work/ex/pr-59199/sources/master#bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7/gh/fudini/neurust"`
[INFO] [stderr] Cloning into 'work/ex/pr-59199/sources/master#bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7/gh/fudini/neurust'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/fudini/neurust" "work/ex/pr-59199/sources/try#68fcf881bd1e4dbfc21e22f8c7a56b8a5d8e8f7b/gh/fudini/neurust"`
[INFO] [stderr] Cloning into 'work/ex/pr-59199/sources/try#68fcf881bd1e4dbfc21e22f8c7a56b8a5d8e8f7b/gh/fudini/neurust'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 5dfe883bb281a98eb0e28df1018ab944ed183ac0
[INFO] sha for GitHub repo fudini/neurust: 5dfe883bb281a98eb0e28df1018ab944ed183ac0
[INFO] validating manifest of fudini/neurust on toolchain master#bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of fudini/neurust on toolchain try#68fcf881bd1e4dbfc21e22f8c7a56b8a5d8e8f7b
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+68fcf881bd1e4dbfc21e22f8c7a56b8a5d8e8f7b-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing fudini/neurust
[INFO] finished frobbing fudini/neurust
[INFO] frobbed toml for fudini/neurust written to work/ex/pr-59199/sources/master#bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7/gh/fudini/neurust/Cargo.toml
[INFO] started frobbing fudini/neurust
[INFO] finished frobbing fudini/neurust
[INFO] frobbed toml for fudini/neurust written to work/ex/pr-59199/sources/try#68fcf881bd1e4dbfc21e22f8c7a56b8a5d8e8f7b/gh/fudini/neurust/Cargo.toml
[INFO] crate fudini/neurust already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+68fcf881bd1e4dbfc21e22f8c7a56b8a5d8e8f7b-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking fudini/neurust against try#68fcf881bd1e4dbfc21e22f8c7a56b8a5d8e8f7b for pr-59199
[INFO] running `"docker" "create" "-v" "/mnt/crater-raid/crater/work/local/target-dirs/pr-59199/worker-6/try#68fcf881bd1e4dbfc21e22f8c7a56b8a5d8e8f7b:/opt/crater/target:rw,Z" "-v" "/mnt/crater-raid/crater/work/ex/pr-59199/sources/try#68fcf881bd1e4dbfc21e22f8c7a56b8a5d8e8f7b/gh/fudini/neurust:/opt/crater/workdir:ro,Z" "-v" "/mnt/crater-raid/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/crater-raid/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=forbid" "-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" "+68fcf881bd1e4dbfc21e22f8c7a56b8a5d8e8f7b-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] e406902d6900714dfe32bb350e83c320cdd14bd3eec57cd549b169ab3ece0d86
[INFO] running `"docker" "start" "-a" "e406902d6900714dfe32bb350e83c320cdd14bd3eec57cd549b169ab3ece0d86"`
[INFO] [stderr]     Checking time v0.1.36
[INFO] [stderr]     Checking neurust v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `Neuron`
[INFO] [stderr]  --> src/main.rs:9:30
[INFO] [stderr]   |
[INFO] [stderr] 9 | use neural::{ NeuralNetwork, Neuron };
[INFO] [stderr]   |                              ^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Neuron`
[INFO] [stderr]  --> src/main.rs:9:30
[INFO] [stderr]   |
[INFO] [stderr] 9 | use neural::{ NeuralNetwork, Neuron };
[INFO] [stderr]   |                              ^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `error` is never read
[INFO] [stderr]   --> src/main.rs:36:13
[INFO] [stderr]    |
[INFO] [stderr] 36 |     let mut error = 0.0;
[INFO] [stderr]    |             ^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_assignments)] on by default
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `error` is never read
[INFO] [stderr]   --> src/main.rs:36:13
[INFO] [stderr]    |
[INFO] [stderr] 36 |     let mut error = 0.0;
[INFO] [stderr]    |             ^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_assignments)] on by default
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Data`
[INFO] [stderr]   --> src/neural.rs:36:1
[INFO] [stderr]    |
[INFO] [stderr] 36 | pub struct Data {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `import`
[INFO] [stderr]    --> src/neural.rs:180:5
[INFO] [stderr]     |
[INFO] [stderr] 180 |     pub fn import(data: Data) -> NeuralNetwork {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `export`
[INFO] [stderr]    --> src/neural.rs:198:5
[INFO] [stderr]     |
[INFO] [stderr] 198 |     pub fn export(&self) -> Data { 
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `render_digit`
[INFO] [stderr]    --> src/mnist.rs:136:1
[INFO] [stderr]     |
[INFO] [stderr] 136 | pub fn render_digit(pixels: &Vec<f64>) {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `tanh_activation`
[INFO] [stderr]   --> src/functions.rs:16:5
[INFO] [stderr]    |
[INFO] [stderr] 16 |     fn tanh_activation(x: f64) -> f64 {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `tanh_derivative`
[INFO] [stderr]   --> src/functions.rs:20:5
[INFO] [stderr]    |
[INFO] [stderr] 20 |     fn tanh_derivative(o: f64) -> f64 {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: static item is never used: `TANH`
[INFO] [stderr]   --> src/functions.rs:26:5
[INFO] [stderr]    |
[INFO] [stderr] 26 |     pub static TANH: ActivationFn = (tanh_activation, tanh_derivative);
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `run_xor`
[INFO] [stderr]   --> src/main.rs:88:1
[INFO] [stderr]    |
[INFO] [stderr] 88 | fn run_xor () {
[INFO] [stderr]    | ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/mnist.rs:34:5
[INFO] [stderr]    |
[INFO] [stderr] 34 |     file.read_exact(&mut buffer);
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_must_use)] on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/mnist.rs:89:9
[INFO] [stderr]    |
[INFO] [stderr] 89 |         images_reader.seek(SeekFrom::Start(16 + (i * image_size) as u64));
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/mnist.rs:93:9
[INFO] [stderr]    |
[INFO] [stderr] 93 |         labels_reader.seek(SeekFrom::Start(8 + i as u64));
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Data`
[INFO] [stderr]   --> src/neural.rs:36:1
[INFO] [stderr]    |
[INFO] [stderr] 36 | pub struct Data {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `with_layers`
[INFO] [stderr]    --> src/neural.rs:128:5
[INFO] [stderr]     |
[INFO] [stderr] 128 | /     pub fn with_layers(
[INFO] [stderr] 129 | |             layers: Vec<Vec<RefCell<Neuron>>>,
[INFO] [stderr] 130 | |             learning_rate: f64,
[INFO] [stderr] 131 | |             activation_fn: ActivationFn,
[INFO] [stderr] ...   |
[INFO] [stderr] 144 | |         }
[INFO] [stderr] 145 | |     }
[INFO] [stderr]     | |_____^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `import`
[INFO] [stderr]    --> src/neural.rs:180:5
[INFO] [stderr]     |
[INFO] [stderr] 180 |     pub fn import(data: Data) -> NeuralNetwork {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `export`
[INFO] [stderr]    --> src/neural.rs:198:5
[INFO] [stderr]     |
[INFO] [stderr] 198 |     pub fn export(&self) -> Data { 
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `render_digit`
[INFO] [stderr]    --> src/mnist.rs:136:1
[INFO] [stderr]     |
[INFO] [stderr] 136 | pub fn render_digit(pixels: &Vec<f64>) {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `tanh_activation`
[INFO] [stderr]   --> src/functions.rs:16:5
[INFO] [stderr]    |
[INFO] [stderr] 16 |     fn tanh_activation(x: f64) -> f64 {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `tanh_derivative`
[INFO] [stderr]   --> src/functions.rs:20:5
[INFO] [stderr]    |
[INFO] [stderr] 20 |     fn tanh_derivative(o: f64) -> f64 {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: static item is never used: `TANH`
[INFO] [stderr]   --> src/functions.rs:26:5
[INFO] [stderr]    |
[INFO] [stderr] 26 |     pub static TANH: ActivationFn = (tanh_activation, tanh_derivative);
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `run_xor`
[INFO] [stderr]   --> src/main.rs:88:1
[INFO] [stderr]    |
[INFO] [stderr] 88 | fn run_xor () {
[INFO] [stderr]    | ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/mnist.rs:34:5
[INFO] [stderr]    |
[INFO] [stderr] 34 |     file.read_exact(&mut buffer);
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_must_use)] on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/mnist.rs:89:9
[INFO] [stderr]    |
[INFO] [stderr] 89 |         images_reader.seek(SeekFrom::Start(16 + (i * image_size) as u64));
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/mnist.rs:93:9
[INFO] [stderr]    |
[INFO] [stderr] 93 |         labels_reader.seek(SeekFrom::Start(8 + i as u64));
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.38s
[INFO] running `"docker" "inspect" "e406902d6900714dfe32bb350e83c320cdd14bd3eec57cd549b169ab3ece0d86"`
[INFO] running `"docker" "rm" "-f" "e406902d6900714dfe32bb350e83c320cdd14bd3eec57cd549b169ab3ece0d86"`
[INFO] [stdout] e406902d6900714dfe32bb350e83c320cdd14bd3eec57cd549b169ab3ece0d86