[INFO] updating cached repository mankinskin/neuralnet
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/mankinskin/neuralnet
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/mankinskin/neuralnet" "work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/mankinskin/neuralnet"`
[INFO] [stderr] Cloning into 'work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/mankinskin/neuralnet'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/mankinskin/neuralnet" "work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/mankinskin/neuralnet"`
[INFO] [stderr] Cloning into 'work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/mankinskin/neuralnet'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 406df86db73559d1dae723715976e11f9ba4b9f2
[INFO] sha for GitHub repo mankinskin/neuralnet: 406df86db73559d1dae723715976e11f9ba4b9f2
[INFO] validating manifest of mankinskin/neuralnet on toolchain master#60960a260f7b5c695fd0717311d72ce62dd4eb43
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+60960a260f7b5c695fd0717311d72ce62dd4eb43-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of mankinskin/neuralnet on toolchain try#266783e4e09e4e9d5307c1c8e695659c58bbcac7
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing mankinskin/neuralnet
[INFO] finished frobbing mankinskin/neuralnet
[INFO] frobbed toml for mankinskin/neuralnet written to work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/mankinskin/neuralnet/Cargo.toml
[INFO] started frobbing mankinskin/neuralnet
[INFO] finished frobbing mankinskin/neuralnet
[INFO] frobbed toml for mankinskin/neuralnet written to work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/mankinskin/neuralnet/Cargo.toml
[INFO] crate mankinskin/neuralnet already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+60960a260f7b5c695fd0717311d72ce62dd4eb43-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] checking mankinskin/neuralnet against try#266783e4e09e4e9d5307c1c8e695659c58bbcac7 for pr-63376
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-63376/worker-4/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/mankinskin/neuralnet:/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=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" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] e57b4a2a1f0145b8ca5e1654d0d2baa4cb30e088ce9871d0d3ae1dfa7a2d1463
[INFO] running `"docker" "start" "-a" "e57b4a2a1f0145b8ca5e1654d0d2baa4cb30e088ce9871d0d3ae1dfa7a2d1463"`
[INFO] [stderr]     Checking threadpool v1.7.1
[INFO] [stderr]     Checking nalgebra v0.17.2
[INFO] [stderr] warning[E0502]: cannot borrow `*self` as immutable because it is also borrowed as mutable
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/nalgebra-0.17.2/src/base/cg.rs:297:44
[INFO] [stderr]     |
[INFO] [stderr] 297 |                 self[(j, i)] += shift[j] * self[(D::dim() - 1, i)];
[INFO] [stderr]     |                 ---------------------------^^^^-------------------
[INFO] [stderr]     |                 |                          |
[INFO] [stderr]     |                 |                          immutable borrow occurs here
[INFO] [stderr]     |                 mutable borrow occurs here
[INFO] [stderr]     |                 mutable borrow later used here
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this error has been downgraded to a warning for backwards compatibility with previous releases
[INFO] [stderr]     = warning: this represents potential undefined behavior in your code and this warning will become a hard error in the future
[INFO] [stderr]     = note: for more information, try `rustc --explain E0729`
[INFO] [stderr] 
[INFO] [stderr]     Checking neuralnet v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused `#[macro_use]` import
[INFO] [stderr]  --> src/main.rs:4:1
[INFO] [stderr]   |
[INFO] [stderr] 4 | #[macro_use]
[INFO] [stderr]   | ^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::iter::Zip`
[INFO] [stderr]   --> src/main.rs:16:5
[INFO] [stderr]    |
[INFO] [stderr] 16 | use std::iter::Zip;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `Distribution`, `Normal`, `uniform::Uniform`
[INFO] [stderr]   --> src/main.rs:17:27
[INFO] [stderr]    |
[INFO] [stderr] 17 | use rand::distributions::{uniform::Uniform, Normal, Distribution};
[INFO] [stderr]    |                           ^^^^^^^^^^^^^^^^  ^^^^^^  ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `f64`
[INFO] [stderr]   --> src/main.rs:18:11
[INFO] [stderr]    |
[INFO] [stderr] 18 | use std::{f64, f32};
[INFO] [stderr]    |           ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around assigned value
[INFO] [stderr]   --> src/neural.rs:56:17
[INFO] [stderr]    |
[INFO] [stderr] 56 |     let layer = (vec![vec![0.0; width]; width]);//.iter_mut()
[INFO] [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `for` head expression
[INFO] [stderr]    --> src/neural.rs:126:19
[INFO] [stderr]     |
[INFO] [stderr] 126 |         for ni in (0..self.weights[0].len()) { // index of neuron
[INFO] [stderr]     |                   ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `for` head expression
[INFO] [stderr]    --> src/neural.rs:127:23
[INFO] [stderr]     |
[INFO] [stderr] 127 |             for wi in (0..self.weights[0][0].len()) { // index of weight
[INFO] [stderr]     |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `for` head expression
[INFO] [stderr]    --> src/neural.rs:128:27
[INFO] [stderr]     |
[INFO] [stderr] 128 |                 for li in (0..self.weights.len()-1) { // layer
[INFO] [stderr]     |                           ^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Rng`
[INFO] [stderr]  --> src/genetic.rs:2:12
[INFO] [stderr]   |
[INFO] [stderr] 2 | use rand::{Rng};
[INFO] [stderr]   |            ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `for` head expression
[INFO] [stderr]   --> src/main.rs:57:14
[INFO] [stderr]    |
[INFO] [stderr] 57 |     for i in (0..MAX_NUMBER) {
[INFO] [stderr]    |              ^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unused `#[macro_use]` import
[INFO] [stderr]  --> src/main.rs:4:1
[INFO] [stderr]   |
[INFO] [stderr] 4 | #[macro_use]
[INFO] [stderr]   | ^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::iter::Zip`
[INFO] [stderr]   --> src/main.rs:16:5
[INFO] [stderr]    |
[INFO] [stderr] 16 | use std::iter::Zip;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `Distribution`, `Normal`, `uniform::Uniform`
[INFO] [stderr]   --> src/main.rs:17:27
[INFO] [stderr]    |
[INFO] [stderr] 17 | use rand::distributions::{uniform::Uniform, Normal, Distribution};
[INFO] [stderr]    |                           ^^^^^^^^^^^^^^^^  ^^^^^^  ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `f64`
[INFO] [stderr]   --> src/main.rs:18:11
[INFO] [stderr]    |
[INFO] [stderr] 18 | use std::{f64, f32};
[INFO] [stderr]    |           ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around assigned value
[INFO] [stderr]   --> src/neural.rs:56:17
[INFO] [stderr]    |
[INFO] [stderr] 56 |     let layer = (vec![vec![0.0; width]; width]);//.iter_mut()
[INFO] [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `for` head expression
[INFO] [stderr]    --> src/neural.rs:126:19
[INFO] [stderr]     |
[INFO] [stderr] 126 |         for ni in (0..self.weights[0].len()) { // index of neuron
[INFO] [stderr]     |                   ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `for` head expression
[INFO] [stderr]    --> src/neural.rs:127:23
[INFO] [stderr]     |
[INFO] [stderr] 127 |             for wi in (0..self.weights[0][0].len()) { // index of weight
[INFO] [stderr]     |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `for` head expression
[INFO] [stderr]    --> src/neural.rs:128:27
[INFO] [stderr]     |
[INFO] [stderr] 128 |                 for li in (0..self.weights.len()-1) { // layer
[INFO] [stderr]     |                           ^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Rng`
[INFO] [stderr]  --> src/genetic.rs:2:12
[INFO] [stderr]   |
[INFO] [stderr] 2 | use rand::{Rng};
[INFO] [stderr]   |            ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `for` head expression
[INFO] [stderr]   --> src/main.rs:57:14
[INFO] [stderr]    |
[INFO] [stderr] 57 |     for i in (0..MAX_NUMBER) {
[INFO] [stderr]    |              ^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'rand::Rng::choose': use SliceRandom::choose instead
[INFO] [stderr]    --> src/neural.rs:182:34
[INFO] [stderr]     |
[INFO] [stderr] 182 |                         *w = rng.choose::<f32>(&[0.0, 1.0]).unwrap().clone();//gen_range(-1.0f32, 1.0f32);
[INFO] [stderr]     |                                  ^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `l`
[INFO] [stderr]   --> src/neural.rs:98:14
[INFO] [stderr]    |
[INFO] [stderr] 98 |         for (l, weightlayer) in self.weights.iter().enumerate() {
[INFO] [stderr]    |              ^ help: consider prefixing with an underscore: `_l`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:104:13
[INFO] [stderr]     |
[INFO] [stderr] 104 |         let mut total_error: f32 = scores.iter().sum();
[INFO] [stderr]     |             ----^^^^^^^^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] warning: use of deprecated item 'rand::Rng::choose': use SliceRandom::choose instead
[INFO] [stderr]    --> src/neural.rs:182:34
[INFO] [stderr]     |
[INFO] [stderr] 182 |                         *w = rng.choose::<f32>(&[0.0, 1.0]).unwrap().clone();//gen_range(-1.0f32, 1.0f32);
[INFO] [stderr]     |                                  ^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:105:13
[INFO] [stderr]     |
[INFO] [stderr] 105 |         let mut selection_error: f32 = (&scores[..SELECTION_COUNT]).iter().sum::<f32>();
[INFO] [stderr]     |             ----^^^^^^^^^^^^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `l`
[INFO] [stderr]   --> src/neural.rs:98:14
[INFO] [stderr]    |
[INFO] [stderr] 98 |         for (l, weightlayer) in self.weights.iter().enumerate() {
[INFO] [stderr]    |              ^ help: consider prefixing with an underscore: `_l`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/neural.rs:178:13
[INFO] [stderr]     |
[INFO] [stderr] 178 |         for mut layer in self.weights.iter_mut() {
[INFO] [stderr]     |             ----^^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/neural.rs:179:17
[INFO] [stderr]     |
[INFO] [stderr] 179 |             for mut weights in layer.iter_mut() {
[INFO] [stderr]     |                 ----^^^^^^^
[INFO] [stderr]     |                 |
[INFO] [stderr]     |                 help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/neural.rs:180:21
[INFO] [stderr]     |
[INFO] [stderr] 180 |                 for mut w in weights.iter_mut() {
[INFO] [stderr]     |                     ----^
[INFO] [stderr]     |                     |
[INFO] [stderr]     |                     help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/neural.rs:193:14
[INFO] [stderr]     |
[INFO] [stderr] 193 |         for (mut new_layer, (layer_a, layer_b))
[INFO] [stderr]     |              ----^^^^^^^^^
[INFO] [stderr]     |              |
[INFO] [stderr]     |              help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/neural.rs:196:18
[INFO] [stderr]     |
[INFO] [stderr] 196 |             for (mut new_weights, (weights_a, weights_b))
[INFO] [stderr]     |                  ----^^^^^^^^^^^
[INFO] [stderr]     |                  |
[INFO] [stderr]     |                  help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/neural.rs:199:22
[INFO] [stderr]     |
[INFO] [stderr] 199 |                 for (mut w, (&a, &b))
[INFO] [stderr]     |                      ----^
[INFO] [stderr]     |                      |
[INFO] [stderr]     |                      help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: private type `neural::Neuron` in public interface (error E0446)
[INFO] [stderr]    --> src/neural.rs:91:9
[INFO] [stderr]     |
[INFO] [stderr] 91  | /         pub fn process(&self, input: Layer) -> Layer {
[INFO] [stderr] 92  | |         assert!(input.len() == self.width);
[INFO] [stderr] 93  | |         let mut layer = input;
[INFO] [stderr] 94  | |
[INFO] [stderr] ...   |
[INFO] [stderr] 111 | |         layer
[INFO] [stderr] 112 | |     }
[INFO] [stderr]     | |_____^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(private_in_public)]` on by default
[INFO] [stderr]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stderr]     = note: for more information, see issue #34537 <https://github.com/rust-lang/rust/issues/34537>
[INFO] [stderr] 
[INFO] [stderr] warning: private type `neural::Neuron` in public interface (error E0446)
[INFO] [stderr]    --> src/neural.rs:91:9
[INFO] [stderr]     |
[INFO] [stderr] 91  | /         pub fn process(&self, input: Layer) -> Layer {
[INFO] [stderr] 92  | |         assert!(input.len() == self.width);
[INFO] [stderr] 93  | |         let mut layer = input;
[INFO] [stderr] 94  | |
[INFO] [stderr] ...   |
[INFO] [stderr] 111 | |         layer
[INFO] [stderr] 112 | |     }
[INFO] [stderr]     | |_____^
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stderr]     = note: for more information, see issue #34537 <https://github.com/rust-lang/rust/issues/34537>
[INFO] [stderr] 
[INFO] [stderr] warning: type alias is never used: `Layers`
[INFO] [stderr]   --> src/neural.rs:46:1
[INFO] [stderr]    |
[INFO] [stderr] 46 | type Layers = Vec<Layer>;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `print`
[INFO] [stderr]    --> src/neural.rs:125:5
[INFO] [stderr]     |
[INFO] [stderr] 125 |     pub fn print(&self) {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `weight_count`
[INFO] [stderr]    --> src/neural.rs:137:5
[INFO] [stderr]     |
[INFO] [stderr] 137 |     fn weight_count(&self) -> usize {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: the feature `range_contains` has been stable since 1.35.0 and no longer requires an attribute to enable
[INFO] [stderr]  --> src/main.rs:1:12
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(range_contains)]
[INFO] [stderr]   |            ^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(stable_features)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable `POP_SIZE` should have a snake case name
[INFO] [stderr]   --> src/main.rs:76:9
[INFO] [stderr]    |
[INFO] [stderr] 76 |     let POP_SIZE: usize = gaussian_sum(SELECTION_COUNT);
[INFO] [stderr]    |         ^^^^^^^^ help: convert the identifier to snake case: `pop_size`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:104:13
[INFO] [stderr]     |
[INFO] [stderr] 104 |         let mut total_error: f32 = scores.iter().sum();
[INFO] [stderr]     |             ----^^^^^^^^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:105:13
[INFO] [stderr]     |
[INFO] [stderr] 105 |         let mut selection_error: f32 = (&scores[..SELECTION_COUNT]).iter().sum::<f32>();
[INFO] [stderr]     |             ----^^^^^^^^^^^^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/neural.rs:178:13
[INFO] [stderr]     |
[INFO] [stderr] 178 |         for mut layer in self.weights.iter_mut() {
[INFO] [stderr]     |             ----^^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/neural.rs:179:17
[INFO] [stderr]     |
[INFO] [stderr] 179 |             for mut weights in layer.iter_mut() {
[INFO] [stderr]     |                 ----^^^^^^^
[INFO] [stderr]     |                 |
[INFO] [stderr]     |                 help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/neural.rs:180:21
[INFO] [stderr]     |
[INFO] [stderr] 180 |                 for mut w in weights.iter_mut() {
[INFO] [stderr]     |                     ----^
[INFO] [stderr]     |                     |
[INFO] [stderr]     |                     help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/neural.rs:193:14
[INFO] [stderr]     |
[INFO] [stderr] 193 |         for (mut new_layer, (layer_a, layer_b))
[INFO] [stderr]     |              ----^^^^^^^^^
[INFO] [stderr]     |              |
[INFO] [stderr]     |              help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/neural.rs:196:18
[INFO] [stderr]     |
[INFO] [stderr] 196 |             for (mut new_weights, (weights_a, weights_b))
[INFO] [stderr]     |                  ----^^^^^^^^^^^
[INFO] [stderr]     |                  |
[INFO] [stderr]     |                  help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/neural.rs:199:22
[INFO] [stderr]     |
[INFO] [stderr] 199 |                 for (mut w, (&a, &b))
[INFO] [stderr]     |                      ----^
[INFO] [stderr]     |                      |
[INFO] [stderr]     |                      help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: private type `neural::Neuron` in public interface (error E0446)
[INFO] [stderr]    --> src/neural.rs:91:9
[INFO] [stderr]     |
[INFO] [stderr] 91  | /         pub fn process(&self, input: Layer) -> Layer {
[INFO] [stderr] 92  | |         assert!(input.len() == self.width);
[INFO] [stderr] 93  | |         let mut layer = input;
[INFO] [stderr] 94  | |
[INFO] [stderr] ...   |
[INFO] [stderr] 111 | |         layer
[INFO] [stderr] 112 | |     }
[INFO] [stderr]     | |_____^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(private_in_public)]` on by default
[INFO] [stderr]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stderr]     = note: for more information, see issue #34537 <https://github.com/rust-lang/rust/issues/34537>
[INFO] [stderr] 
[INFO] [stderr] warning: private type `neural::Neuron` in public interface (error E0446)
[INFO] [stderr]    --> src/neural.rs:91:9
[INFO] [stderr]     |
[INFO] [stderr] 91  | /         pub fn process(&self, input: Layer) -> Layer {
[INFO] [stderr] 92  | |         assert!(input.len() == self.width);
[INFO] [stderr] 93  | |         let mut layer = input;
[INFO] [stderr] 94  | |
[INFO] [stderr] ...   |
[INFO] [stderr] 111 | |         layer
[INFO] [stderr] 112 | |     }
[INFO] [stderr]     | |_____^
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stderr]     = note: for more information, see issue #34537 <https://github.com/rust-lang/rust/issues/34537>
[INFO] [stderr] 
[INFO] [stderr] warning: type alias is never used: `Layers`
[INFO] [stderr]   --> src/neural.rs:46:1
[INFO] [stderr]    |
[INFO] [stderr] 46 | type Layers = Vec<Layer>;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `print`
[INFO] [stderr]    --> src/neural.rs:125:5
[INFO] [stderr]     |
[INFO] [stderr] 125 |     pub fn print(&self) {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `weight_count`
[INFO] [stderr]    --> src/neural.rs:137:5
[INFO] [stderr]     |
[INFO] [stderr] 137 |     fn weight_count(&self) -> usize {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: the feature `range_contains` has been stable since 1.35.0 and no longer requires an attribute to enable
[INFO] [stderr]  --> src/main.rs:1:12
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(range_contains)]
[INFO] [stderr]   |            ^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(stable_features)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable `POP_SIZE` should have a snake case name
[INFO] [stderr]   --> src/main.rs:76:9
[INFO] [stderr]    |
[INFO] [stderr] 76 |     let POP_SIZE: usize = gaussian_sum(SELECTION_COUNT);
[INFO] [stderr]    |         ^^^^^^^^ help: convert the identifier to snake case: `pop_size`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 35.04s
[INFO] running `"docker" "inspect" "e57b4a2a1f0145b8ca5e1654d0d2baa4cb30e088ce9871d0d3ae1dfa7a2d1463"`
[INFO] running `"docker" "rm" "-f" "e57b4a2a1f0145b8ca5e1654d0d2baa4cb30e088ce9871d0d3ae1dfa7a2d1463"`
[INFO] [stdout] e57b4a2a1f0145b8ca5e1654d0d2baa4cb30e088ce9871d0d3ae1dfa7a2d1463