[INFO] cloning repository https://github.com/LelouBil/RustPerceptron
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/LelouBil/RustPerceptron" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLelouBil%2FRustPerceptron", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLelouBil%2FRustPerceptron'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 45d448240e66ba40bcee89fc31ea4daee0c0cbfb
[INFO] checking LelouBil/RustPerceptron against 1.95.0 for pr-155915
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLelouBil%2FRustPerceptron" "/workspace/builds/worker-6-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/LelouBil/RustPerceptron
[INFO] finished tweaking git repo https://github.com/LelouBil/RustPerceptron
[INFO] tweaked toml for git repo https://github.com/LelouBil/RustPerceptron written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/LelouBil/RustPerceptron on toolchain 1.95.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.95.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/LelouBil/RustPerceptron 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" "+1.95.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
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[INFO] [stdout] 12e658d88cb0a8feb09f18153d0f0dcfa01a92346a78d4da666d9effc6bdea58
[INFO] running `Command { std: "docker" "start" "-a" "12e658d88cb0a8feb09f18153d0f0dcfa01a92346a78d4da666d9effc6bdea58", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "12e658d88cb0a8feb09f18153d0f0dcfa01a92346a78d4da666d9effc6bdea58", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "12e658d88cb0a8feb09f18153d0f0dcfa01a92346a78d4da666d9effc6bdea58", kill_on_drop: false }`
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1.95.0" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3bdb206bed41f0182aaef1576d269bf59bd47578ea3ab7fdb5faec99bde6365b
[INFO] running `Command { std: "docker" "start" "-a" "3bdb206bed41f0182aaef1576d269bf59bd47578ea3ab7fdb5faec99bde6365b", kill_on_drop: false }`
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[INFO] [stderr]    Compiling cmake v0.1.48
[INFO] [stderr]    Compiling libc v0.2.118
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling ucd-trie v0.1.3
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[INFO] [stderr]    Compiling num-rational v0.3.2
[INFO] [stderr]    Compiling num-iter v0.1.42
[INFO] [stderr]    Compiling memchr v2.4.1
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[INFO] [stderr]    Compiling serde v1.0.136
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[INFO] [stderr]    Compiling anyhow v1.0.53
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[INFO] [stderr]    Compiling semver-parser v0.10.2
[INFO] [stderr]    Compiling semver v0.11.0
[INFO] [stderr]    Compiling rustc_version v0.3.3
[INFO] [stderr]    Compiling pathfinder_simd v0.5.1
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[INFO] [stderr]     Checking pathfinder_geometry v0.5.1
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[INFO] [stderr]    Compiling thiserror-impl v1.0.30
[INFO] [stderr]     Checking csv v1.1.6
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[INFO] [stderr]     Checking Perceptron v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `Array2`
[INFO] [stdout]  --> src/record.rs:1:23
[INFO] [stdout]   |
[INFO] [stdout] 1 | use ndarray::{Array1, Array2};
[INFO] [stdout]   |                       ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::error::Error`
[INFO] [stdout]  --> src/data_loading.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::error::Error;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Display` and `Formatter`
[INFO] [stdout]  --> src/data_loading.rs:2:16
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::fmt::{Display, Formatter};
[INFO] [stdout]   |                ^^^^^^^  ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::fs::read`
[INFO] [stdout]  --> src/data_loading.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::fs::read;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `csv::ErrorKind`
[INFO] [stdout]  --> src/data_loading.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use csv::ErrorKind;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Chunk` and `Itertools`
[INFO] [stdout]  --> src/data_loading.rs:5:17
[INFO] [stdout]   |
[INFO] [stdout] 5 | use itertools::{Chunk, Itertools};
[INFO] [stdout]   |                 ^^^^^  ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `itertools::IntoChunks`
[INFO] [stdout]  --> src/data_loading.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use itertools::IntoChunks;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::record`
[INFO] [stdout]  --> src/data_loading.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use crate::record;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `PerceptronLabel`
[INFO] [stdout]  --> src/data_loading.rs:8:40
[INFO] [stdout]   |
[INFO] [stdout] 8 | use crate::record::{PerceptronDataset, PerceptronLabel, PerceptronRecord};
[INFO] [stdout]   |                                        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Map`
[INFO] [stdout]  --> src/data_loading.rs:9:31
[INFO] [stdout]   |
[INFO] [stdout] 9 | use std::iter::{IntoIterator, Map};
[INFO] [stdout]   |                               ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::num::ParseFloatError`
[INFO] [stdout]   --> src/data_loading.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | use std::num::ParseFloatError;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::str::FromStr`
[INFO] [stdout]   --> src/data_loading.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | use std::str::FromStr;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Array2`
[INFO] [stdout]  --> src/record.rs:1:23
[INFO] [stdout]   |
[INFO] [stdout] 1 | use ndarray::{Array1, Array2};
[INFO] [stdout]   |                       ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::error::Error`
[INFO] [stdout]  --> src/data_loading.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::error::Error;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Display` and `Formatter`
[INFO] [stdout]  --> src/data_loading.rs:2:16
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::fmt::{Display, Formatter};
[INFO] [stdout]   |                ^^^^^^^  ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::fs::read`
[INFO] [stdout]  --> src/data_loading.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::fs::read;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `csv::ErrorKind`
[INFO] [stdout]  --> src/data_loading.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use csv::ErrorKind;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Chunk` and `Itertools`
[INFO] [stdout]  --> src/data_loading.rs:5:17
[INFO] [stdout]   |
[INFO] [stdout] 5 | use itertools::{Chunk, Itertools};
[INFO] [stdout]   |                 ^^^^^  ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `itertools::IntoChunks`
[INFO] [stdout]  --> src/data_loading.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use itertools::IntoChunks;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::record`
[INFO] [stdout]  --> src/data_loading.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use crate::record;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `PerceptronLabel`
[INFO] [stdout]  --> src/data_loading.rs:8:40
[INFO] [stdout]   |
[INFO] [stdout] 8 | use crate::record::{PerceptronDataset, PerceptronLabel, PerceptronRecord};
[INFO] [stdout]   |                                        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Map`
[INFO] [stdout]  --> src/data_loading.rs:9:31
[INFO] [stdout]   |
[INFO] [stdout] 9 | use std::iter::{IntoIterator, Map};
[INFO] [stdout]   |                               ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::num::ParseFloatError`
[INFO] [stdout]   --> src/data_loading.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | use std::num::ParseFloatError;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::str::FromStr`
[INFO] [stdout]   --> src/data_loading.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | use std::str::FromStr;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `thiserror::Error`
[INFO] [stdout]   --> src/data_loading.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 13 | use thiserror::Error;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Add`, `Deref`, and `Mul`
[INFO] [stdout]  --> src/train_perceptron.rs:1:16
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::ops::{Add, Deref, Mul};
[INFO] [stdout]   |                ^^^  ^^^^^  ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `ArrayBase`, `ArrayView1`, `Dim`, `Ix2`, `Ix`, `OwnedRepr`, `Shape`, and `StrideShape`
[INFO] [stdout]  --> src/train_perceptron.rs:3:23
[INFO] [stdout]   |
[INFO] [stdout] 3 | ...2, ArrayBase, ArrayView1, ArrayView2, Axis, concatenate, Dim, Ix, Ix2, OwnedRepr, Shape, ShapeBuilder, ShapeError, StrideShape};
[INFO] [stdout]   |       ^^^^^^^^^  ^^^^^^^^^^                                 ^^^  ^^  ^^^  ^^^^^^^^^  ^^^^^                            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `#[macro_use]` import
[INFO] [stdout]  --> src/main.rs:6:1
[INFO] [stdout]   |
[INFO] [stdout] 6 | #[macro_use]
[INFO] [stdout]   | ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `ndarray::Array2`
[INFO] [stdout]  --> src/main.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 | use ndarray::Array2;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `thiserror::Error`
[INFO] [stdout]   --> src/data_loading.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 13 | use thiserror::Error;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Add`, `Deref`, and `Mul`
[INFO] [stdout]  --> src/train_perceptron.rs:1:16
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::ops::{Add, Deref, Mul};
[INFO] [stdout]   |                ^^^  ^^^^^  ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `ArrayBase`, `ArrayView1`, `Dim`, `Ix2`, `Ix`, `OwnedRepr`, `Shape`, and `StrideShape`
[INFO] [stdout]  --> src/train_perceptron.rs:3:23
[INFO] [stdout]   |
[INFO] [stdout] 3 | ...2, ArrayBase, ArrayView1, ArrayView2, Axis, concatenate, Dim, Ix, Ix2, OwnedRepr, Shape, ShapeBuilder, ShapeError, StrideShape};
[INFO] [stdout]   |       ^^^^^^^^^  ^^^^^^^^^^                                 ^^^  ^^  ^^^  ^^^^^^^^^  ^^^^^                            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `#[macro_use]` import
[INFO] [stdout]  --> src/main.rs:6:1
[INFO] [stdout]   |
[INFO] [stdout] 6 | #[macro_use]
[INFO] [stdout]   | ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `ndarray::Array2`
[INFO] [stdout]  --> src/main.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 | use ndarray::Array2;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> src/train_perceptron.rs:22:22
[INFO] [stdout]    |
[INFO] [stdout] 22 |             .find(|((i,j),elem) : &((usize,usize),&f64)| elem < &&0.0);
[INFO] [stdout]    |                      ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `j`
[INFO] [stdout]   --> src/train_perceptron.rs:22:24
[INFO] [stdout]    |
[INFO] [stdout] 22 |             .find(|((i,j),elem) : &((usize,usize),&f64)| elem < &&0.0);
[INFO] [stdout]    |                        ^ help: if this is intentional, prefix it with an underscore: `_j`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `j`
[INFO] [stdout]   --> src/train_perceptron.rs:24:26
[INFO] [stdout]    |
[INFO] [stdout] 24 |         if let Some(((i, j), value)) = pabien {
[INFO] [stdout]    |                          ^ help: if this is intentional, prefix it with an underscore: `_j`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `value`
[INFO] [stdout]   --> src/train_perceptron.rs:24:30
[INFO] [stdout]    |
[INFO] [stdout] 24 |         if let Some(((i, j), value)) = pabien {
[INFO] [stdout]    |                              ^^^^^ help: if this is intentional, prefix it with an underscore: `_value`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> src/train_perceptron.rs:22:22
[INFO] [stdout]    |
[INFO] [stdout] 22 |             .find(|((i,j),elem) : &((usize,usize),&f64)| elem < &&0.0);
[INFO] [stdout]    |                      ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `j`
[INFO] [stdout]   --> src/train_perceptron.rs:22:24
[INFO] [stdout]    |
[INFO] [stdout] 22 |             .find(|((i,j),elem) : &((usize,usize),&f64)| elem < &&0.0);
[INFO] [stdout]    |                        ^ help: if this is intentional, prefix it with an underscore: `_j`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `j`
[INFO] [stdout]   --> src/train_perceptron.rs:24:26
[INFO] [stdout]    |
[INFO] [stdout] 24 |         if let Some(((i, j), value)) = pabien {
[INFO] [stdout]    |                          ^ help: if this is intentional, prefix it with an underscore: `_j`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `value`
[INFO] [stdout]   --> src/train_perceptron.rs:24:30
[INFO] [stdout]    |
[INFO] [stdout] 24 |         if let Some(((i, j), value)) = pabien {
[INFO] [stdout]    |                              ^^^^^ help: if this is intentional, prefix it with an underscore: `_value`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `X` should have a snake case name
[INFO] [stdout]  --> src/train_perceptron.rs:9:10
[INFO] [stdout]   |
[INFO] [stdout] 9 |     let (X, Y) = to_matrix(dataset).map(|(x, y)| (x.mapv(|e| *e), y.mapv(|e| e as f64)))?;
[INFO] [stdout]   |          ^ help: convert the identifier to snake case (notice the capitalization): `x`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_snake_case)]` (part of `#[warn(nonstandard_style)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `Y` should have a snake case name
[INFO] [stdout]  --> src/train_perceptron.rs:9:13
[INFO] [stdout]   |
[INFO] [stdout] 9 |     let (X, Y) = to_matrix(dataset).map(|(x, y)| (x.mapv(|e| *e), y.mapv(|e| e as f64)))?;
[INFO] [stdout]   |             ^ help: convert the identifier to snake case (notice the capitalization): `y`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `X` should have a snake case name
[INFO] [stdout]  --> src/train_perceptron.rs:9:10
[INFO] [stdout]   |
[INFO] [stdout] 9 |     let (X, Y) = to_matrix(dataset).map(|(x, y)| (x.mapv(|e| *e), y.mapv(|e| e as f64)))?;
[INFO] [stdout]   |          ^ help: convert the identifier to snake case (notice the capitalization): `x`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_snake_case)]` (part of `#[warn(nonstandard_style)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `Y` should have a snake case name
[INFO] [stdout]  --> src/train_perceptron.rs:9:13
[INFO] [stdout]   |
[INFO] [stdout] 9 |     let (X, Y) = to_matrix(dataset).map(|(x, y)| (x.mapv(|e| *e), y.mapv(|e| e as f64)))?;
[INFO] [stdout]   |             ^ help: convert the identifier to snake case (notice the capitalization): `y`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 14.50s
[INFO] running `Command { std: "docker" "inspect" "3bdb206bed41f0182aaef1576d269bf59bd47578ea3ab7fdb5faec99bde6365b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3bdb206bed41f0182aaef1576d269bf59bd47578ea3ab7fdb5faec99bde6365b", kill_on_drop: false }`
[INFO] [stdout] 3bdb206bed41f0182aaef1576d269bf59bd47578ea3ab7fdb5faec99bde6365b
