[INFO] updating cached repository weirdev/spectral-graph-partitioning
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/weirdev/spectral-graph-partitioning
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/weirdev/spectral-graph-partitioning" "work/ex/clippy-test-run/sources/stable/gh/weirdev/spectral-graph-partitioning"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable/gh/weirdev/spectral-graph-partitioning'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/weirdev/spectral-graph-partitioning" "work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/weirdev/spectral-graph-partitioning"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/weirdev/spectral-graph-partitioning'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] d240ed374d9acf7a64545adf4c60dae6911ce3a7
[INFO] sha for GitHub repo weirdev/spectral-graph-partitioning: d240ed374d9acf7a64545adf4c60dae6911ce3a7
[INFO] validating manifest of weirdev/spectral-graph-partitioning 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 weirdev/spectral-graph-partitioning 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 weirdev/spectral-graph-partitioning
[INFO] finished frobbing weirdev/spectral-graph-partitioning
[INFO] frobbed toml for weirdev/spectral-graph-partitioning written to work/ex/clippy-test-run/sources/stable/gh/weirdev/spectral-graph-partitioning/Cargo.toml
[INFO] started frobbing weirdev/spectral-graph-partitioning
[INFO] finished frobbing weirdev/spectral-graph-partitioning
[INFO] frobbed toml for weirdev/spectral-graph-partitioning written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/weirdev/spectral-graph-partitioning/Cargo.toml
[INFO] crate weirdev/spectral-graph-partitioning 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 weirdev/spectral-graph-partitioning against stable for clippy-test-run
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/clippy-test-run/worker-6/stable:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/clippy-test-run/sources/stable/gh/weirdev/spectral-graph-partitioning:/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] 99538ad9b5df2ad93c180f40dcc021c82ed32a6613fda801ff745e209a295db5
[INFO] running `"docker" "start" "-a" "99538ad9b5df2ad93c180f40dcc021c82ed32a6613fda801ff745e209a295db5"`
[INFO] [stderr]     Checking rand_isaac v0.1.0
[INFO] [stderr]    Compiling rand v0.6.0
[INFO] [stderr]     Checking ralgographpart v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: 5th binding whose name is just one char
[INFO] [stderr]   --> src/graph.rs:60:17
[INFO] [stderr]    |
[INFO] [stderr] 60 |         let mut b = (&(&itr * &w).unwrap() * &s).unwrap();
[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: redundant field names in struct initialization
[INFO] [stderr]   --> src/matrix.rs:17:13
[INFO] [stderr]    |
[INFO] [stderr] 17 |             r: r,
[INFO] [stderr]    |             ^^^^ help: replace it with: `r`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::redundant_field_names)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]   --> src/matrix.rs:18:13
[INFO] [stderr]    |
[INFO] [stderr] 18 |             c: c,
[INFO] [stderr]    |             ^^^^ help: replace it with: `c`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]   --> src/matrix.rs:74:13
[INFO] [stderr]    |
[INFO] [stderr] 74 |             r: r,
[INFO] [stderr]    |             ^^^^ help: replace it with: `r`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]   --> src/matrix.rs:75:13
[INFO] [stderr]    |
[INFO] [stderr] 75 |             c: c,
[INFO] [stderr]    |             ^^^^ help: replace it with: `c`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]   --> src/matrix.rs:76:13
[INFO] [stderr]    |
[INFO] [stderr] 76 |             elements: elements
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^ help: replace it with: `elements`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: using `write!()` with a format string that ends in a single newline, consider using `writeln!()` instead
[INFO] [stderr]    --> src/matrix.rs:421:13
[INFO] [stderr]     |
[INFO] [stderr] 421 |             write!(f, "\n")?;
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::write_with_newline)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#write_with_newline
[INFO] [stderr] 
[INFO] [stderr] warning: 5th binding whose name is just one char
[INFO] [stderr]    --> src/matrix.rs:460:13
[INFO] [stderr]     |
[INFO] [stderr] 460 |         let b = 2.0 * v[0].powi(2) / (s + v[0].powi(2));
[INFO] [stderr]     |             ^
[INFO] [stderr]     |
[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/graph.rs:60:17
[INFO] [stderr]    |
[INFO] [stderr] 60 |         let mut b = (&(&itr * &w).unwrap() * &s).unwrap();
[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: redundant field names in struct initialization
[INFO] [stderr]   --> src/matrix.rs:17:13
[INFO] [stderr]    |
[INFO] [stderr] 17 |             r: r,
[INFO] [stderr]    |             ^^^^ help: replace it with: `r`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::redundant_field_names)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]   --> src/matrix.rs:18:13
[INFO] [stderr]    |
[INFO] [stderr] 18 |             c: c,
[INFO] [stderr]    |             ^^^^ help: replace it with: `c`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]   --> src/matrix.rs:74:13
[INFO] [stderr]    |
[INFO] [stderr] 74 |             r: r,
[INFO] [stderr]    |             ^^^^ help: replace it with: `r`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]   --> src/matrix.rs:75:13
[INFO] [stderr]    |
[INFO] [stderr] 75 |             c: c,
[INFO] [stderr]    |             ^^^^ help: replace it with: `c`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]   --> src/matrix.rs:76:13
[INFO] [stderr]    |
[INFO] [stderr] 76 |             elements: elements
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^ help: replace it with: `elements`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: using `write!()` with a format string that ends in a single newline, consider using `writeln!()` instead
[INFO] [stderr]    --> src/matrix.rs:421:13
[INFO] [stderr]     |
[INFO] [stderr] 421 |             write!(f, "\n")?;
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::write_with_newline)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#write_with_newline
[INFO] [stderr] 
[INFO] [stderr] warning: 5th binding whose name is just one char
[INFO] [stderr]    --> src/matrix.rs:460:13
[INFO] [stderr]     |
[INFO] [stderr] 460 |         let b = 2.0 * v[0].powi(2) / (s + v[0].powi(2));
[INFO] [stderr]     |             ^
[INFO] [stderr]     |
[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: unused import: `matrix::Matrix`
[INFO] [stderr]   --> src/main.rs:10:5
[INFO] [stderr]    |
[INFO] [stderr] 10 | use matrix::Matrix;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `matrix::Matrix`
[INFO] [stderr]   --> src/main.rs:10:5
[INFO] [stderr]    |
[INFO] [stderr] 10 | use matrix::Matrix;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `laplacian`
[INFO] [stderr]   --> src/graph.rs:42:5
[INFO] [stderr]    |
[INFO] [stderr] 42 |     pub fn laplacian(&self) -> Matrix {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `create_pairwise_connected`
[INFO] [stderr]   --> src/graph.rs:72:1
[INFO] [stderr]    |
[INFO] [stderr] 72 | pub fn create_pairwise_connected(pairs: usize) -> Graph {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `create_bipartite`
[INFO] [stderr]   --> src/graph.rs:80:1
[INFO] [stderr]    |
[INFO] [stderr] 80 | pub fn create_bipartite(half_size: usize) -> Graph {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `create_from_2d_points`
[INFO] [stderr]   --> src/graph.rs:90:1
[INFO] [stderr]    |
[INFO] [stderr] 90 | pub fn create_from_2d_points(x: Vec<f64>, y: Vec<f64>) -> Result<Graph, &'static str> {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `variance`
[INFO] [stderr]    --> src/graph.rs:123:1
[INFO] [stderr]     |
[INFO] [stderr] 123 | fn variance(x: &Vec<f64>) -> Result<f64, &'static str> {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `mean`
[INFO] [stderr]    --> src/graph.rs:136:1
[INFO] [stderr]     |
[INFO] [stderr] 136 | fn mean(x: &Vec<f64>) -> f64 {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `to_square`
[INFO] [stderr]    --> src/matrix.rs:299:5
[INFO] [stderr]     |
[INFO] [stderr] 299 |     pub fn to_square(self) -> Matrix {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `golub_kahan_svd_iteration`
[INFO] [stderr]    --> src/matrix.rs:469:1
[INFO] [stderr]     |
[INFO] [stderr] 469 | pub fn golub_kahan_svd_iteration(d: Vec<f64>, f: Vec<f64>) {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: writing `&Vec<_>` instead of `&[_]` involves one more reference and cannot be used with non-Vec-based slices.
[INFO] [stderr]    --> src/graph.rs:123:16
[INFO] [stderr]     |
[INFO] [stderr] 123 | fn variance(x: &Vec<f64>) -> Result<f64, &'static str> {
[INFO] [stderr]     |                ^^^^^^^^^ help: change this to: `&[f64]`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::ptr_arg)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#ptr_arg
[INFO] [stderr] 
[INFO] [stderr] warning: length comparison to zero
[INFO] [stderr]    --> src/graph.rs:124:8
[INFO] [stderr]     |
[INFO] [stderr] 124 |     if x.len() == 0 {
[INFO] [stderr]     |        ^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `x.is_empty()`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::len_zero)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_zero
[INFO] [stderr] 
[INFO] [stderr] warning: writing `&Vec<_>` instead of `&[_]` involves one more reference and cannot be used with non-Vec-based slices.
[INFO] [stderr]    --> src/graph.rs:136:12
[INFO] [stderr]     |
[INFO] [stderr] 136 | fn mean(x: &Vec<f64>) -> f64 {
[INFO] [stderr]     |            ^^^^^^^^^ help: change this to: `&[f64]`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#ptr_arg
[INFO] [stderr] 
[INFO] [stderr] warning: length comparison to zero
[INFO] [stderr]    --> src/graph.rs:137:8
[INFO] [stderr]     |
[INFO] [stderr] 137 |     if x.len() > 0 {
[INFO] [stderr]     |        ^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `!x.is_empty()`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_zero
[INFO] [stderr] 
[INFO] [stderr] warning: it looks like you're manually copying between slices
[INFO] [stderr]   --> src/matrix.rs:25:18
[INFO] [stderr]    |
[INFO] [stderr] 25 |         for i in 0..diagonals.len() {
[INFO] [stderr]    |                  ^^^^^^^^^^^^^^^^^^ help: try replacing the loop by: `mat[i][..diagonals.len()].clone_from_slice(&diagonals[..])`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::manual_memcpy)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#manual_memcpy
[INFO] [stderr] 
[INFO] [stderr] warning: the loop variable `i` is only used to index `mat`.
[INFO] [stderr]   --> src/matrix.rs:35:18
[INFO] [stderr]    |
[INFO] [stderr] 35 |         for i in 0..r {
[INFO] [stderr]    |                  ^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::needless_range_loop)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_range_loop
[INFO] [stderr] help: consider using an iterator
[INFO] [stderr]    |
[INFO] [stderr] 35 |         for <item> in mat.iter_mut().take(r) {
[INFO] [stderr]    |             ^^^^^^    ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: writing `&Vec<_>` instead of `&[_]` involves one more reference and cannot be used with non-Vec-based slices.
[INFO] [stderr]   --> src/matrix.rs:44:24
[INFO] [stderr]    |
[INFO] [stderr] 44 |     pub fn from_vec(v: &Vec<f64>) -> Matrix {
[INFO] [stderr]    |                        ^^^^^^^^^ help: change this to: `&[f64]`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#ptr_arg
[INFO] [stderr] 
[INFO] [stderr] warning: the loop variable `i` is used to index `mat`
[INFO] [stderr]   --> src/matrix.rs:56:18
[INFO] [stderr]    |
[INFO] [stderr] 56 |         for i in 0..n {
[INFO] [stderr]    |                  ^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_range_loop
[INFO] [stderr] help: consider using an iterator
[INFO] [stderr]    |
[INFO] [stderr] 56 |         for (i, <item>) in mat.iter_mut().enumerate().take(n) {
[INFO] [stderr]    |             ^^^^^^^^^^^    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: the loop variable `i` is only used to index `elements`.
[INFO] [stderr]   --> src/matrix.rs:67:22
[INFO] [stderr]    |
[INFO] [stderr] 67 |             for i in 1..r {
[INFO] [stderr]    |                      ^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_range_loop
[INFO] [stderr] help: consider using an iterator
[INFO] [stderr]    |
[INFO] [stderr] 67 |             for <item> in elements.iter().take(r).skip(1) {
[INFO] [stderr]    |                 ^^^^^^    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: the loop variable `i` is used to index `self`
[INFO] [stderr]   --> src/matrix.rs:93:18
[INFO] [stderr]    |
[INFO] [stderr] 93 |         for i in 0..cmp::min(self.r, self.c) {
[INFO] [stderr]    |                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_range_loop
[INFO] [stderr] help: consider using an iterator
[INFO] [stderr]    |
[INFO] [stderr] 93 |         for (i, <item>) in self.iter().enumerate().take(cmp::min(self.r, self.c)) {
[INFO] [stderr]    |             ^^^^^^^^^^^    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: the loop variable `i` is only used to index `self`.
[INFO] [stderr]    --> src/matrix.rs:101:18
[INFO] [stderr]     |
[INFO] [stderr] 101 |         for i in 0..self.r {
[INFO] [stderr]     |                  ^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_range_loop
[INFO] [stderr] help: consider using an iterator
[INFO] [stderr]     |
[INFO] [stderr] 101 |         for <item> in self.iter().take(self.r) {
[INFO] [stderr]     |             ^^^^^^    ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: it looks like you're manually copying between slices
[INFO] [stderr]    --> src/matrix.rs:109:22
[INFO] [stderr]     |
[INFO] [stderr] 109 |             for j in 0..sub.c {
[INFO] [stderr]     |                      ^^^^^^^^ help: try replacing the loop by: `self[row + i][column..(sub.c + column)].clone_from_slice(&sub[i][..sub.c])`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#manual_memcpy
[INFO] [stderr] 
[INFO] [stderr] warning: the loop variable `j` is used to index `mat`
[INFO] [stderr]    --> src/matrix.rs:118:22
[INFO] [stderr]     |
[INFO] [stderr] 118 |             for j in 0..self.c {
[INFO] [stderr]     |                      ^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_range_loop
[INFO] [stderr] help: consider using an iterator
[INFO] [stderr]     |
[INFO] [stderr] 118 |             for (j, <item>) in mat.iter_mut().enumerate().take(self.c) {
[INFO] [stderr]     |                 ^^^^^^^^^^^    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: the loop variable `i` is only used to index `bin`.
[INFO] [stderr]    --> src/matrix.rs:135:22
[INFO] [stderr]     |
[INFO] [stderr] 135 |             for i in 1..bin.len() {
[INFO] [stderr]     |                      ^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_range_loop
[INFO] [stderr] help: consider using an iterator
[INFO] [stderr]     |
[INFO] [stderr] 135 |             for <item> in bin.iter().skip(1) {
[INFO] [stderr]     |                 ^^^^^^    ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: the loop variable `i` is only used to index `self`.
[INFO] [stderr]    --> src/matrix.rs:157:22
[INFO] [stderr]     |
[INFO] [stderr] 157 |             for i in j..self.r {
[INFO] [stderr]     |                      ^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_range_loop
[INFO] [stderr] help: consider using an iterator
[INFO] [stderr]     |
[INFO] [stderr] 157 |             for <item> in self.iter().take(self.r).skip(j) {
[INFO] [stderr]     |                 ^^^^^^    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: it looks like you're manually copying between slices
[INFO] [stderr]    --> src/matrix.rs:199:22
[INFO] [stderr]     |
[INFO] [stderr] 199 |             for j in i..self.c {
[INFO] [stderr]     |                      ^^^^^^^^^ help: try replacing the loop by: `r[i][i..self.c].clone_from_slice(&self[i][i..self.c])`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#manual_memcpy
[INFO] [stderr] 
[INFO] [stderr] warning: the loop variable `i` is only used to index `self`.
[INFO] [stderr]    --> src/matrix.rs:222:22
[INFO] [stderr]     |
[INFO] [stderr] 222 |             for i in j..self.r {
[INFO] [stderr]     |                      ^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_range_loop
[INFO] [stderr] help: consider using an iterator
[INFO] [stderr]     |
[INFO] [stderr] 222 |             for <item> in self.iter().take(self.r).skip(j) {
[INFO] [stderr]     |                 ^^^^^^    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: methods called `to_*` usually take self by reference; consider choosing a less ambiguous name
[INFO] [stderr]    --> src/matrix.rs:299:22
[INFO] [stderr]     |
[INFO] [stderr] 299 |     pub fn to_square(self) -> Matrix {
[INFO] [stderr]     |                      ^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::wrong_self_convention)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#wrong_self_convention
[INFO] [stderr] 
[INFO] [stderr] warning: explicit lifetimes given in parameter types where they could be elided (or replaced with `'_` if needed by type declaration)
[INFO] [stderr]    --> src/matrix.rs:339:5
[INFO] [stderr]     |
[INFO] [stderr] 339 | /     fn index<'a>(&'a self, index: usize) -> &'a Self::Output {
[INFO] [stderr] 340 | |         &self.elements[index]
[INFO] [stderr] 341 | |     }
[INFO] [stderr]     | |_____^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::needless_lifetimes)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_lifetimes
[INFO] [stderr] 
[INFO] [stderr] warning: explicit lifetimes given in parameter types where they could be elided (or replaced with `'_` if needed by type declaration)
[INFO] [stderr]    --> src/matrix.rs:345:5
[INFO] [stderr]     |
[INFO] [stderr] 345 | /     fn index_mut<'a>(&'a mut self, index: usize) -> &'a mut Self::Output {
[INFO] [stderr] 346 | |         &mut self.elements[index]
[INFO] [stderr] 347 | |     }
[INFO] [stderr]     | |_____^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_lifetimes
[INFO] [stderr] 
[INFO] [stderr] warning: the loop variable `x` is used to index `rhs`
[INFO] [stderr]    --> src/matrix.rs:378:26
[INFO] [stderr]     |
[INFO] [stderr] 378 |                 for x in 0..self.c {
[INFO] [stderr]     |                          ^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_range_loop
[INFO] [stderr] help: consider using an iterator
[INFO] [stderr]     |
[INFO] [stderr] 378 |                 for (x, <item>) in rhs.iter().enumerate().take(self.c) {
[INFO] [stderr]     |                     ^^^^^^^^^^^    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: the loop variable `r` is only used to index `self`.
[INFO] [stderr]    --> src/matrix.rs:417:18
[INFO] [stderr]     |
[INFO] [stderr] 417 |         for r in 0..self.r-1 {
[INFO] [stderr]     |                  ^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_range_loop
[INFO] [stderr] help: consider using an iterator
[INFO] [stderr]     |
[INFO] [stderr] 417 |         for <item> in self.iter().take(self.r-1) {
[INFO] [stderr]     |             ^^^^^^    ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: the loop variable `i` is only used to index `x`.
[INFO] [stderr]    --> src/matrix.rs:446:14
[INFO] [stderr]     |
[INFO] [stderr] 446 |     for i in 1..x.len() {
[INFO] [stderr]     |              ^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_range_loop
[INFO] [stderr] help: consider using an iterator
[INFO] [stderr]     |
[INFO] [stderr] 446 |     for <item> in x.iter().skip(1) {
[INFO] [stderr]     |         ^^^^^^    ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: the loop variable `m` is only used to index `points_per_cluster`.
[INFO] [stderr]   --> src/cluster.rs:39:14
[INFO] [stderr]    |
[INFO] [stderr] 39 |     for m in 1..centroids.len() {
[INFO] [stderr]    |              ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_range_loop
[INFO] [stderr] help: consider using an iterator
[INFO] [stderr]    |
[INFO] [stderr] 39 |     for <item> in points_per_cluster.iter_mut().take(centroids.len()).skip(1) {
[INFO] [stderr]    |         ^^^^^^    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `laplacian`
[INFO] [stderr]   --> src/graph.rs:42:5
[INFO] [stderr]    |
[INFO] [stderr] 42 |     pub fn laplacian(&self) -> Matrix {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `create_pairwise_connected`
[INFO] [stderr]   --> src/graph.rs:72:1
[INFO] [stderr]    |
[INFO] [stderr] 72 | pub fn create_pairwise_connected(pairs: usize) -> Graph {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `create_bipartite`
[INFO] [stderr]   --> src/graph.rs:80:1
[INFO] [stderr]    |
[INFO] [stderr] 80 | pub fn create_bipartite(half_size: usize) -> Graph {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `create_from_2d_points`
[INFO] [stderr]   --> src/graph.rs:90:1
[INFO] [stderr]    |
[INFO] [stderr] 90 | pub fn create_from_2d_points(x: Vec<f64>, y: Vec<f64>) -> Result<Graph, &'static str> {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `variance`
[INFO] [stderr]    --> src/graph.rs:123:1
[INFO] [stderr]     |
[INFO] [stderr] 123 | fn variance(x: &Vec<f64>) -> Result<f64, &'static str> {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `mean`
[INFO] [stderr]    --> src/graph.rs:136:1
[INFO] [stderr]     |
[INFO] [stderr] 136 | fn mean(x: &Vec<f64>) -> f64 {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `to_square`
[INFO] [stderr]    --> src/matrix.rs:299:5
[INFO] [stderr]     |
[INFO] [stderr] 299 |     pub fn to_square(self) -> Matrix {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `golub_kahan_svd_iteration`
[INFO] [stderr]    --> src/matrix.rs:469:1
[INFO] [stderr]     |
[INFO] [stderr] 469 | pub fn golub_kahan_svd_iteration(d: Vec<f64>, f: Vec<f64>) {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: writing `&Vec<_>` instead of `&[_]` involves one more reference and cannot be used with non-Vec-based slices.
[INFO] [stderr]    --> src/graph.rs:123:16
[INFO] [stderr]     |
[INFO] [stderr] 123 | fn variance(x: &Vec<f64>) -> Result<f64, &'static str> {
[INFO] [stderr]     |                ^^^^^^^^^ help: change this to: `&[f64]`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::ptr_arg)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#ptr_arg
[INFO] [stderr] 
[INFO] [stderr] warning: length comparison to zero
[INFO] [stderr]    --> src/graph.rs:124:8
[INFO] [stderr]     |
[INFO] [stderr] 124 |     if x.len() == 0 {
[INFO] [stderr]     |        ^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `x.is_empty()`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::len_zero)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_zero
[INFO] [stderr] 
[INFO] [stderr] warning: writing `&Vec<_>` instead of `&[_]` involves one more reference and cannot be used with non-Vec-based slices.
[INFO] [stderr]    --> src/graph.rs:136:12
[INFO] [stderr]     |
[INFO] [stderr] 136 | fn mean(x: &Vec<f64>) -> f64 {
[INFO] [stderr]     |            ^^^^^^^^^ help: change this to: `&[f64]`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#ptr_arg
[INFO] [stderr] 
[INFO] [stderr] warning: length comparison to zero
[INFO] [stderr]    --> src/graph.rs:137:8
[INFO] [stderr]     |
[INFO] [stderr] 137 |     if x.len() > 0 {
[INFO] [stderr]     |        ^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `!x.is_empty()`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_zero
[INFO] [stderr] 
[INFO] [stderr] warning: it looks like you're manually copying between slices
[INFO] [stderr]   --> src/matrix.rs:25:18
[INFO] [stderr]    |
[INFO] [stderr] 25 |         for i in 0..diagonals.len() {
[INFO] [stderr]    |                  ^^^^^^^^^^^^^^^^^^ help: try replacing the loop by: `mat[i][..diagonals.len()].clone_from_slice(&diagonals[..])`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::manual_memcpy)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#manual_memcpy
[INFO] [stderr] 
[INFO] [stderr] warning: the loop variable `i` is only used to index `mat`.
[INFO] [stderr]   --> src/matrix.rs:35:18
[INFO] [stderr]    |
[INFO] [stderr] 35 |         for i in 0..r {
[INFO] [stderr]    |                  ^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::needless_range_loop)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_range_loop
[INFO] [stderr] help: consider using an iterator
[INFO] [stderr]    |
[INFO] [stderr] 35 |         for <item> in mat.iter_mut().take(r) {
[INFO] [stderr]    |             ^^^^^^    ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: writing `&Vec<_>` instead of `&[_]` involves one more reference and cannot be used with non-Vec-based slices.
[INFO] [stderr]   --> src/matrix.rs:44:24
[INFO] [stderr]    |
[INFO] [stderr] 44 |     pub fn from_vec(v: &Vec<f64>) -> Matrix {
[INFO] [stderr]    |                        ^^^^^^^^^ help: change this to: `&[f64]`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#ptr_arg
[INFO] [stderr] 
[INFO] [stderr] warning: the loop variable `i` is used to index `mat`
[INFO] [stderr]   --> src/matrix.rs:56:18
[INFO] [stderr]    |
[INFO] [stderr] 56 |         for i in 0..n {
[INFO] [stderr]    |                  ^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_range_loop
[INFO] [stderr] help: consider using an iterator
[INFO] [stderr]    |
[INFO] [stderr] 56 |         for (i, <item>) in mat.iter_mut().enumerate().take(n) {
[INFO] [stderr]    |             ^^^^^^^^^^^    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: the loop variable `i` is only used to index `elements`.
[INFO] [stderr]   --> src/matrix.rs:67:22
[INFO] [stderr]    |
[INFO] [stderr] 67 |             for i in 1..r {
[INFO] [stderr]    |                      ^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_range_loop
[INFO] [stderr] help: consider using an iterator
[INFO] [stderr]    |
[INFO] [stderr] 67 |             for <item> in elements.iter().take(r).skip(1) {
[INFO] [stderr]    |                 ^^^^^^    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: the loop variable `i` is used to index `self`
[INFO] [stderr]   --> src/matrix.rs:93:18
[INFO] [stderr]    |
[INFO] [stderr] 93 |         for i in 0..cmp::min(self.r, self.c) {
[INFO] [stderr]    |                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_range_loop
[INFO] [stderr] help: consider using an iterator
[INFO] [stderr]    |
[INFO] [stderr] 93 |         for (i, <item>) in self.iter().enumerate().take(cmp::min(self.r, self.c)) {
[INFO] [stderr]    |             ^^^^^^^^^^^    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: the loop variable `i` is only used to index `self`.
[INFO] [stderr]    --> src/matrix.rs:101:18
[INFO] [stderr]     |
[INFO] [stderr] 101 |         for i in 0..self.r {
[INFO] [stderr]     |                  ^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_range_loop
[INFO] [stderr] help: consider using an iterator
[INFO] [stderr]     |
[INFO] [stderr] 101 |         for <item> in self.iter().take(self.r) {
[INFO] [stderr]     |             ^^^^^^    ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: it looks like you're manually copying between slices
[INFO] [stderr]    --> src/matrix.rs:109:22
[INFO] [stderr]     |
[INFO] [stderr] 109 |             for j in 0..sub.c {
[INFO] [stderr]     |                      ^^^^^^^^ help: try replacing the loop by: `self[row + i][column..(sub.c + column)].clone_from_slice(&sub[i][..sub.c])`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#manual_memcpy
[INFO] [stderr] 
[INFO] [stderr] warning: the loop variable `j` is used to index `mat`
[INFO] [stderr]    --> src/matrix.rs:118:22
[INFO] [stderr]     |
[INFO] [stderr] 118 |             for j in 0..self.c {
[INFO] [stderr]     |                      ^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_range_loop
[INFO] [stderr] help: consider using an iterator
[INFO] [stderr]     |
[INFO] [stderr] 118 |             for (j, <item>) in mat.iter_mut().enumerate().take(self.c) {
[INFO] [stderr]     |                 ^^^^^^^^^^^    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: the loop variable `i` is only used to index `bin`.
[INFO] [stderr]    --> src/matrix.rs:135:22
[INFO] [stderr]     |
[INFO] [stderr] 135 |             for i in 1..bin.len() {
[INFO] [stderr]     |                      ^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_range_loop
[INFO] [stderr] help: consider using an iterator
[INFO] [stderr]     |
[INFO] [stderr] 135 |             for <item> in bin.iter().skip(1) {
[INFO] [stderr]     |                 ^^^^^^    ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: the loop variable `i` is only used to index `self`.
[INFO] [stderr]    --> src/matrix.rs:157:22
[INFO] [stderr]     |
[INFO] [stderr] 157 |             for i in j..self.r {
[INFO] [stderr]     |                      ^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_range_loop
[INFO] [stderr] help: consider using an iterator
[INFO] [stderr]     |
[INFO] [stderr] 157 |             for <item> in self.iter().take(self.r).skip(j) {
[INFO] [stderr]     |                 ^^^^^^    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: it looks like you're manually copying between slices
[INFO] [stderr]    --> src/matrix.rs:199:22
[INFO] [stderr]     |
[INFO] [stderr] 199 |             for j in i..self.c {
[INFO] [stderr]     |                      ^^^^^^^^^ help: try replacing the loop by: `r[i][i..self.c].clone_from_slice(&self[i][i..self.c])`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#manual_memcpy
[INFO] [stderr] 
[INFO] [stderr] warning: the loop variable `i` is only used to index `self`.
[INFO] [stderr]    --> src/matrix.rs:222:22
[INFO] [stderr]     |
[INFO] [stderr] 222 |             for i in j..self.r {
[INFO] [stderr]     |                      ^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_range_loop
[INFO] [stderr] help: consider using an iterator
[INFO] [stderr]     |
[INFO] [stderr] 222 |             for <item> in self.iter().take(self.r).skip(j) {
[INFO] [stderr]     |                 ^^^^^^    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: methods called `to_*` usually take self by reference; consider choosing a less ambiguous name
[INFO] [stderr]    --> src/matrix.rs:299:22
[INFO] [stderr]     |
[INFO] [stderr] 299 |     pub fn to_square(self) -> Matrix {
[INFO] [stderr]     |                      ^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::wrong_self_convention)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#wrong_self_convention
[INFO] [stderr] 
[INFO] [stderr] warning: explicit lifetimes given in parameter types where they could be elided (or replaced with `'_` if needed by type declaration)
[INFO] [stderr]    --> src/matrix.rs:339:5
[INFO] [stderr]     |
[INFO] [stderr] 339 | /     fn index<'a>(&'a self, index: usize) -> &'a Self::Output {
[INFO] [stderr] 340 | |         &self.elements[index]
[INFO] [stderr] 341 | |     }
[INFO] [stderr]     | |_____^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::needless_lifetimes)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_lifetimes
[INFO] [stderr] 
[INFO] [stderr] warning: explicit lifetimes given in parameter types where they could be elided (or replaced with `'_` if needed by type declaration)
[INFO] [stderr]    --> src/matrix.rs:345:5
[INFO] [stderr]     |
[INFO] [stderr] 345 | /     fn index_mut<'a>(&'a mut self, index: usize) -> &'a mut Self::Output {
[INFO] [stderr] 346 | |         &mut self.elements[index]
[INFO] [stderr] 347 | |     }
[INFO] [stderr]     | |_____^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_lifetimes
[INFO] [stderr] 
[INFO] [stderr] warning: the loop variable `x` is used to index `rhs`
[INFO] [stderr]    --> src/matrix.rs:378:26
[INFO] [stderr]     |
[INFO] [stderr] 378 |                 for x in 0..self.c {
[INFO] [stderr]     |                          ^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_range_loop
[INFO] [stderr] help: consider using an iterator
[INFO] [stderr]     |
[INFO] [stderr] 378 |                 for (x, <item>) in rhs.iter().enumerate().take(self.c) {
[INFO] [stderr]     |                     ^^^^^^^^^^^    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: the loop variable `r` is only used to index `self`.
[INFO] [stderr]    --> src/matrix.rs:417:18
[INFO] [stderr]     |
[INFO] [stderr] 417 |         for r in 0..self.r-1 {
[INFO] [stderr]     |                  ^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_range_loop
[INFO] [stderr] help: consider using an iterator
[INFO] [stderr]     |
[INFO] [stderr] 417 |         for <item> in self.iter().take(self.r-1) {
[INFO] [stderr]     |             ^^^^^^    ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: the loop variable `i` is only used to index `x`.
[INFO] [stderr]    --> src/matrix.rs:446:14
[INFO] [stderr]     |
[INFO] [stderr] 446 |     for i in 1..x.len() {
[INFO] [stderr]     |              ^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_range_loop
[INFO] [stderr] help: consider using an iterator
[INFO] [stderr]     |
[INFO] [stderr] 446 |     for <item> in x.iter().skip(1) {
[INFO] [stderr]     |         ^^^^^^    ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: the loop variable `m` is only used to index `points_per_cluster`.
[INFO] [stderr]   --> src/cluster.rs:39:14
[INFO] [stderr]    |
[INFO] [stderr] 39 |     for m in 1..centroids.len() {
[INFO] [stderr]    |              ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_range_loop
[INFO] [stderr] help: consider using an iterator
[INFO] [stderr]    |
[INFO] [stderr] 39 |     for <item> in points_per_cluster.iter_mut().take(centroids.len()).skip(1) {
[INFO] [stderr]    |         ^^^^^^    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.75s
[INFO] running `"docker" "inspect" "99538ad9b5df2ad93c180f40dcc021c82ed32a6613fda801ff745e209a295db5"`
[INFO] running `"docker" "rm" "-f" "99538ad9b5df2ad93c180f40dcc021c82ed32a6613fda801ff745e209a295db5"`
[INFO] [stdout] 99538ad9b5df2ad93c180f40dcc021c82ed32a6613fda801ff745e209a295db5