[INFO] updating cached repository howeih/Day-17-Perceptron
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/howeih/Day-17-Perceptron
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/howeih/Day-17-Perceptron" "work/ex/clippy-test-run/sources/stable/gh/howeih/Day-17-Perceptron"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable/gh/howeih/Day-17-Perceptron'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/howeih/Day-17-Perceptron" "work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/howeih/Day-17-Perceptron"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/howeih/Day-17-Perceptron'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 53d4c0593b6cceda67b0271785dcd3e43c988abc
[INFO] sha for GitHub repo howeih/Day-17-Perceptron: 53d4c0593b6cceda67b0271785dcd3e43c988abc
[INFO] validating manifest of howeih/Day-17-Perceptron on toolchain stable
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of howeih/Day-17-Perceptron on toolchain stable+rustflags=-Dclippy::into_iter_on_array
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing howeih/Day-17-Perceptron
[INFO] finished frobbing howeih/Day-17-Perceptron
[INFO] frobbed toml for howeih/Day-17-Perceptron written to work/ex/clippy-test-run/sources/stable/gh/howeih/Day-17-Perceptron/Cargo.toml
[INFO] started frobbing howeih/Day-17-Perceptron
[INFO] finished frobbing howeih/Day-17-Perceptron
[INFO] frobbed toml for howeih/Day-17-Perceptron written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/howeih/Day-17-Perceptron/Cargo.toml
[INFO] crate howeih/Day-17-Perceptron has a lockfile. skipping
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] linting howeih/Day-17-Perceptron against stable for clippy-test-run
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/clippy-test-run/worker-2/stable:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/clippy-test-run/sources/stable/gh/howeih/Day-17-Perceptron:/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" "+stable" "clippy" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] ba5a43359d98b365b65c4d5debcb208c37eb77f260fda2e696a5d10734438638
[INFO] running `"docker" "start" "-a" "ba5a43359d98b365b65c4d5debcb208c37eb77f260fda2e696a5d10734438638"`
[INFO] [stderr]     Checking num-complex v0.1.43
[INFO] [stderr]     Checking ndarray v0.11.2
[INFO] [stderr]     Checking perceptron v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: 5th binding whose name is just one char
[INFO] [stderr]   --> src/main.rs:32:13
[INFO] [stderr]    |
[INFO] [stderr] 32 |         let h = perceptron(&xr.to_owned(), &w.to_owned());
[INFO] [stderr]    |             ^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::many_single_char_names)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr] warning: 5th binding whose name is just one char
[INFO] [stderr]   --> src/main.rs:32:13
[INFO] [stderr]    |
[INFO] [stderr] 32 |         let h = perceptron(&xr.to_owned(), &w.to_owned());
[INFO] [stderr]    |             ^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::many_single_char_names)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr] warning: the variable `i` is used as a loop counter. Consider using `for (i, item) in x.genrows().enumerate()` or similar iterators
[INFO] [stderr]   --> src/main.rs:31:15
[INFO] [stderr]    |
[INFO] [stderr] 31 |     for xr in x.genrows() {
[INFO] [stderr]    |               ^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::explicit_counter_loop)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#explicit_counter_loop
[INFO] [stderr] 
[INFO] [stderr] error: strict comparison of f32 or f64
[INFO] [stderr]   --> src/main.rs:33:12
[INFO] [stderr]    |
[INFO] [stderr] 33 |         if h != y[i] {
[INFO] [stderr]    |            ^^^^^^^^^ help: consider comparing them within some error: `(h - y[i]).abs() < error`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[deny(clippy::float_cmp)] on by default
[INFO] [stderr] note: std::f32::EPSILON and std::f64::EPSILON are available.
[INFO] [stderr]   --> src/main.rs:33:12
[INFO] [stderr]    |
[INFO] [stderr] 33 |         if h != y[i] {
[INFO] [stderr]    |            ^^^^^^^^^
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#float_cmp
[INFO] [stderr] 
[INFO] [stderr] warning: `if _ { .. } else { .. }` is an expression
[INFO] [stderr]   --> src/main.rs:34:13
[INFO] [stderr]    |
[INFO] [stderr] 34 | /             let pos;
[INFO] [stderr] 35 | |             if y[i] == 1.0 {
[INFO] [stderr] 36 | |                 pos = w.to_owned() + xr.to_owned(); // xr+w;
[INFO] [stderr] 37 | |             } else {
[INFO] [stderr] 38 | |                 pos = w.to_owned() - xr.to_owned(); // xr+w;
[INFO] [stderr] 39 | |             }
[INFO] [stderr]    | |_____________^ help: it is more idiomatic to write: `let pos = if y[i] == 1.0 { w.to_owned() + xr.to_owned() } else { w.to_owned() - xr.to_owned() };`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::useless_let_if_seq)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_let_if_seq
[INFO] [stderr] 
[INFO] [stderr] error: strict comparison of f32 or f64
[INFO] [stderr]   --> src/main.rs:35:16
[INFO] [stderr]    |
[INFO] [stderr] 35 |             if y[i] == 1.0 {
[INFO] [stderr]    |                ^^^^^^^^^^^ help: consider comparing them within some error: `(y[i] - 1.0).abs() < error`
[INFO] [stderr]    |
[INFO] [stderr] note: std::f32::EPSILON and std::f64::EPSILON are available.
[INFO] [stderr]   --> src/main.rs:35:16
[INFO] [stderr]    |
[INFO] [stderr] 35 |             if y[i] == 1.0 {
[INFO] [stderr]    |                ^^^^^^^^^^^
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#float_cmp
[INFO] [stderr] 
[INFO] [stderr] error: strict comparison of f32 or f64
[INFO] [stderr]   --> src/main.rs:53:12
[INFO] [stderr]    |
[INFO] [stderr] 53 |         if h == y {
[INFO] [stderr]    |            ^^^^^^ help: consider comparing them within some error: `(h - y).abs() < error`
[INFO] [stderr]    |
[INFO] [stderr] note: std::f32::EPSILON and std::f64::EPSILON are available.
[INFO] [stderr]   --> src/main.rs:53:12
[INFO] [stderr]    |
[INFO] [stderr] 53 |         if h == y {
[INFO] [stderr]    |            ^^^^^^
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#float_cmp
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 3 previous errors
[INFO] [stderr] 
[INFO] [stderr] error: Could not compile `perceptron`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] warning: the variable `i` is used as a loop counter. Consider using `for (i, item) in x.genrows().enumerate()` or similar iterators
[INFO] [stderr]   --> src/main.rs:31:15
[INFO] [stderr]    |
[INFO] [stderr] 31 |     for xr in x.genrows() {
[INFO] [stderr]    |               ^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::explicit_counter_loop)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#explicit_counter_loop
[INFO] [stderr] 
[INFO] [stderr] error: strict comparison of f32 or f64
[INFO] [stderr]   --> src/main.rs:33:12
[INFO] [stderr]    |
[INFO] [stderr] 33 |         if h != y[i] {
[INFO] [stderr]    |            ^^^^^^^^^ help: consider comparing them within some error: `(h - y[i]).abs() < error`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[deny(clippy::float_cmp)] on by default
[INFO] [stderr] note: std::f32::EPSILON and std::f64::EPSILON are available.
[INFO] [stderr]   --> src/main.rs:33:12
[INFO] [stderr]    |
[INFO] [stderr] 33 |         if h != y[i] {
[INFO] [stderr]    |            ^^^^^^^^^
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#float_cmp
[INFO] [stderr] 
[INFO] [stderr] warning: `if _ { .. } else { .. }` is an expression
[INFO] [stderr]   --> src/main.rs:34:13
[INFO] [stderr]    |
[INFO] [stderr] 34 | /             let pos;
[INFO] [stderr] 35 | |             if y[i] == 1.0 {
[INFO] [stderr] 36 | |                 pos = w.to_owned() + xr.to_owned(); // xr+w;
[INFO] [stderr] 37 | |             } else {
[INFO] [stderr] 38 | |                 pos = w.to_owned() - xr.to_owned(); // xr+w;
[INFO] [stderr] 39 | |             }
[INFO] [stderr]    | |_____________^ help: it is more idiomatic to write: `let pos = if y[i] == 1.0 { w.to_owned() + xr.to_owned() } else { w.to_owned() - xr.to_owned() };`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::useless_let_if_seq)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_let_if_seq
[INFO] [stderr] 
[INFO] [stderr] error: strict comparison of f32 or f64
[INFO] [stderr]   --> src/main.rs:35:16
[INFO] [stderr]    |
[INFO] [stderr] 35 |             if y[i] == 1.0 {
[INFO] [stderr]    |                ^^^^^^^^^^^ help: consider comparing them within some error: `(y[i] - 1.0).abs() < error`
[INFO] [stderr]    |
[INFO] [stderr] note: std::f32::EPSILON and std::f64::EPSILON are available.
[INFO] [stderr]   --> src/main.rs:35:16
[INFO] [stderr]    |
[INFO] [stderr] 35 |             if y[i] == 1.0 {
[INFO] [stderr]    |                ^^^^^^^^^^^
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#float_cmp
[INFO] [stderr] 
[INFO] [stderr] error: strict comparison of f32 or f64
[INFO] [stderr]   --> src/main.rs:53:12
[INFO] [stderr]    |
[INFO] [stderr] 53 |         if h == y {
[INFO] [stderr]    |            ^^^^^^ help: consider comparing them within some error: `(h - y).abs() < error`
[INFO] [stderr]    |
[INFO] [stderr] note: std::f32::EPSILON and std::f64::EPSILON are available.
[INFO] [stderr]   --> src/main.rs:53:12
[INFO] [stderr]    |
[INFO] [stderr] 53 |         if h == y {
[INFO] [stderr]    |            ^^^^^^
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#float_cmp
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 3 previous errors
[INFO] [stderr] 
[INFO] [stderr] error: Could not compile `perceptron`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "ba5a43359d98b365b65c4d5debcb208c37eb77f260fda2e696a5d10734438638"`
[INFO] running `"docker" "rm" "-f" "ba5a43359d98b365b65c4d5debcb208c37eb77f260fda2e696a5d10734438638"`
[INFO] [stdout] ba5a43359d98b365b65c4d5debcb208c37eb77f260fda2e696a5d10734438638