[INFO] crate superpixel 0.1.1 is already in cache
[INFO] extracting crate superpixel 0.1.1 into work/ex/clippy-test-run/sources/stable/reg/superpixel/0.1.1
[INFO] extracting crate superpixel 0.1.1 into work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/reg/superpixel/0.1.1
[INFO] validating manifest of superpixel-0.1.1 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 superpixel-0.1.1 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 superpixel-0.1.1
[INFO] finished frobbing superpixel-0.1.1
[INFO] frobbed toml for superpixel-0.1.1 written to work/ex/clippy-test-run/sources/stable/reg/superpixel/0.1.1/Cargo.toml
[INFO] started frobbing superpixel-0.1.1
[INFO] finished frobbing superpixel-0.1.1
[INFO] frobbed toml for superpixel-0.1.1 written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/reg/superpixel/0.1.1/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[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 superpixel-0.1.1 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/reg/superpixel/0.1.1:/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] b2bb38afef8fe0cc358cb12254d9b35550c3cdbc3d880729fa6fba64a8e4c35a
[INFO] running `"docker" "start" "-a" "b2bb38afef8fe0cc358cb12254d9b35550c3cdbc3d880729fa6fba64a8e4c35a"`
[INFO] [stderr]     Checking superpixel v0.1.1 (/opt/crater/workdir)
[INFO] [stderr] warning: 5th binding whose name is just one char
[INFO] [stderr]    --> src/lib.rs:263:29
[INFO] [stderr]     |
[INFO] [stderr] 263 |                         let b = lab_vec[i].b;
[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: 6th binding whose name is just one char
[INFO] [stderr]    --> src/lib.rs:265:33
[INFO] [stderr]     |
[INFO] [stderr] 265 |                         let ref c = s.lab;
[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/lib.rs:263:29
[INFO] [stderr]     |
[INFO] [stderr] 263 |                         let b = lab_vec[i].b;
[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: 6th binding whose name is just one char
[INFO] [stderr]    --> src/lib.rs:265:33
[INFO] [stderr]     |
[INFO] [stderr] 265 |                         let ref c = s.lab;
[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: unneeded return statement
[INFO] [stderr]   --> src/lib.rs:54:5
[INFO] [stderr]    |
[INFO] [stderr] 54 | /     return if val <= 0.04045 {
[INFO] [stderr] 55 | |             val/12.92
[INFO] [stderr] 56 | |         } else {
[INFO] [stderr] 57 | |             ((val+0.055)/1.055).powf(2.4)
[INFO] [stderr] 58 | |         };
[INFO] [stderr]    | |__________^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::needless_return)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] help: remove `return` as shown
[INFO] [stderr]    |
[INFO] [stderr] 54 |     if val <= 0.04045 {
[INFO] [stderr] 55 |             val/12.92
[INFO] [stderr] 56 |         } else {
[INFO] [stderr] 57 |             ((val+0.055)/1.055).powf(2.4)
[INFO] [stderr] 58 |         }
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: long literal lacking separators
[INFO] [stderr]   --> src/lib.rs:74:14
[INFO] [stderr]    |
[INFO] [stderr] 74 |         x: r*0.4124564 + g*0.3575761 + b*0.1804375,
[INFO] [stderr]    |              ^^^^^^^^^ help: consider: `0.412_456_4`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::unreadable_literal)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unreadable_literal
[INFO] [stderr] 
[INFO] [stderr] warning: long literal lacking separators
[INFO] [stderr]   --> src/lib.rs:74:28
[INFO] [stderr]    |
[INFO] [stderr] 74 |         x: r*0.4124564 + g*0.3575761 + b*0.1804375,
[INFO] [stderr]    |                            ^^^^^^^^^ help: consider: `0.357_576_1`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unreadable_literal
[INFO] [stderr] 
[INFO] [stderr] warning: long literal lacking separators
[INFO] [stderr]   --> src/lib.rs:74:42
[INFO] [stderr]    |
[INFO] [stderr] 74 |         x: r*0.4124564 + g*0.3575761 + b*0.1804375,
[INFO] [stderr]    |                                          ^^^^^^^^^ help: consider: `0.180_437_5`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unreadable_literal
[INFO] [stderr] 
[INFO] [stderr] warning: long literal lacking separators
[INFO] [stderr]   --> src/lib.rs:75:14
[INFO] [stderr]    |
[INFO] [stderr] 75 |         y: r*0.2126729 + g*0.7151522 + b*0.0721750,
[INFO] [stderr]    |              ^^^^^^^^^ help: consider: `0.212_672_9`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unreadable_literal
[INFO] [stderr] 
[INFO] [stderr] warning: long literal lacking separators
[INFO] [stderr]   --> src/lib.rs:75:28
[INFO] [stderr]    |
[INFO] [stderr] 75 |         y: r*0.2126729 + g*0.7151522 + b*0.0721750,
[INFO] [stderr]    |                            ^^^^^^^^^ help: consider: `0.715_152_2`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unreadable_literal
[INFO] [stderr] 
[INFO] [stderr] warning: long literal lacking separators
[INFO] [stderr]   --> src/lib.rs:75:42
[INFO] [stderr]    |
[INFO] [stderr] 75 |         y: r*0.2126729 + g*0.7151522 + b*0.0721750,
[INFO] [stderr]    |                                          ^^^^^^^^^ help: consider: `0.072_175_0`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unreadable_literal
[INFO] [stderr] 
[INFO] [stderr] warning: long literal lacking separators
[INFO] [stderr]   --> src/lib.rs:76:14
[INFO] [stderr]    |
[INFO] [stderr] 76 |         z: r*0.0193339 + g*0.1191920 + b*0.9503041,
[INFO] [stderr]    |              ^^^^^^^^^ help: consider: `0.019_333_9`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unreadable_literal
[INFO] [stderr] 
[INFO] [stderr] warning: long literal lacking separators
[INFO] [stderr]   --> src/lib.rs:76:28
[INFO] [stderr]    |
[INFO] [stderr] 76 |         z: r*0.0193339 + g*0.1191920 + b*0.9503041,
[INFO] [stderr]    |                            ^^^^^^^^^ help: consider: `0.119_192_0`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unreadable_literal
[INFO] [stderr] 
[INFO] [stderr] warning: long literal lacking separators
[INFO] [stderr]   --> src/lib.rs:76:42
[INFO] [stderr]    |
[INFO] [stderr] 76 |         z: r*0.0193339 + g*0.1191920 + b*0.9503041,
[INFO] [stderr]    |                                          ^^^^^^^^^ help: consider: `0.950_304_1`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unreadable_literal
[INFO] [stderr] 
[INFO] [stderr] warning: long literal lacking separators
[INFO] [stderr]   --> src/lib.rs:87:19
[INFO] [stderr]    |
[INFO] [stderr] 87 |     let epsilon = 0.008856;
[INFO] [stderr]    |                   ^^^^^^^^ help: consider: `0.008_856`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unreadable_literal
[INFO] [stderr] 
[INFO] [stderr] warning: long literal lacking separators
[INFO] [stderr]   --> src/lib.rs:91:34
[INFO] [stderr]    |
[INFO] [stderr] 91 |     let xyz_white = XYZColor{x : 0.950456, y: 1.0, z: 1.088754};
[INFO] [stderr]    |                                  ^^^^^^^^ help: consider: `0.950_456`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unreadable_literal
[INFO] [stderr] 
[INFO] [stderr] warning: long literal lacking separators
[INFO] [stderr]   --> src/lib.rs:91:55
[INFO] [stderr]    |
[INFO] [stderr] 91 |     let xyz_white = XYZColor{x : 0.950456, y: 1.0, z: 1.088754};
[INFO] [stderr]    |                                                       ^^^^^^^^ help: consider: `1.088_754`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unreadable_literal
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/lib.rs:550:5
[INFO] [stderr]     |
[INFO] [stderr] 550 |     return *numlabels;
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `*numlabels`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/lib.rs:566:5
[INFO] [stderr]     |
[INFO] [stderr] 566 | /     return do_segmentation_with_superpixel_size(
[INFO] [stderr] 567 | |         img, lab_vec, width, height, klabels, &mut numlabels, superpixel_size as u32, compactness, iterations);
[INFO] [stderr]     | |_______________________________________________________________________________________________________________^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] help: remove `return` as shown
[INFO] [stderr]     |
[INFO] [stderr] 566 |     do_segmentation_with_superpixel_size(
[INFO] [stderr] 567 |         img, lab_vec, width, height, klabels, &mut numlabels, superpixel_size as u32, compactness, iterations)
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `idx`
[INFO] [stderr]    --> src/lib.rs:451:17
[INFO] [stderr]     |
[INFO] [stderr] 451 |             let idx = y * width + x;
[INFO] [stderr]     |                 ^^^ help: consider using `_idx` instead
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `klabels`
[INFO] [stderr]    --> src/lib.rs:438:5
[INFO] [stderr]     |
[INFO] [stderr] 438 |     klabels: &Vec<i32>,
[INFO] [stderr]     |     ^^^^^^^ help: consider using `_klabels` instead
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `outline_color`
[INFO] [stderr]    --> src/lib.rs:440:5
[INFO] [stderr]     |
[INFO] [stderr] 440 |     outline_color: &image::Rgb<u8>
[INFO] [stderr]     |     ^^^^^^^^^^^^^ help: consider using `_outline_color` instead
[INFO] [stderr] 
[INFO] [stderr] warning: casting u8 to f64 may become silently lossy if types change
[INFO] [stderr]   --> src/lib.rs:65:23
[INFO] [stderr]    |
[INFO] [stderr] 65 |     let mut r : f64 = (sr as f64) / 255.0;
[INFO] [stderr]    |                       ^^^^^^^^^^^ help: try: `f64::from(sr)`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::cast_lossless)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: casting u8 to f64 may become silently lossy if types change
[INFO] [stderr]   --> src/lib.rs:66:23
[INFO] [stderr]    |
[INFO] [stderr] 66 |     let mut g : f64 = (sg as f64) / 255.0;
[INFO] [stderr]    |                       ^^^^^^^^^^^ help: try: `f64::from(sg)`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: casting u8 to f64 may become silently lossy if types change
[INFO] [stderr]   --> src/lib.rs:67:23
[INFO] [stderr]    |
[INFO] [stderr] 67 |     let mut b : f64 = (sb as f64) / 255.0;
[INFO] [stderr]    |                       ^^^^^^^^^^^ help: try: `f64::from(sb)`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[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/lib.rs:141:14
[INFO] [stderr]     |
[INFO] [stderr] 141 |     lab_vec: & Vec<LABColor>,
[INFO] [stderr]     |              ^^^^^^^^^^^^^^^ help: change this to: `&[LABColor]`
[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: casting i32 to f64 may become silently lossy if types change
[INFO] [stderr]    --> src/lib.rs:145:13
[INFO] [stderr]     |
[INFO] [stderr] 145 |     let s = step as f64;
[INFO] [stderr]     |             ^^^^^^^^^^^ help: try: `f64::from(step)`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: casting i32 to f64 may become silently lossy if types change
[INFO] [stderr]    --> src/lib.rs:147:30
[INFO] [stderr]     |
[INFO] [stderr] 147 |     let mut xstrips = (0.5 + (width as f64)/s) as i32;
[INFO] [stderr]     |                              ^^^^^^^^^^^^^^ help: try: `f64::from(width)`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: casting i32 to f64 may become silently lossy if types change
[INFO] [stderr]    --> src/lib.rs:148:30
[INFO] [stderr]     |
[INFO] [stderr] 148 |     let mut ystrips = (0.5 + (height as f64)/s) as i32;
[INFO] [stderr]     |                              ^^^^^^^^^^^^^^^ help: try: `f64::from(height)`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: casting i32 to f64 may become silently lossy if types change
[INFO] [stderr]    --> src/lib.rs:162:24
[INFO] [stderr]     |
[INFO] [stderr] 162 |     let xerrperstrip = (xerr as f64)/(xstrips as f64);
[INFO] [stderr]     |                        ^^^^^^^^^^^^^ help: try: `f64::from(xerr)`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: casting i32 to f64 may become silently lossy if types change
[INFO] [stderr]    --> src/lib.rs:162:38
[INFO] [stderr]     |
[INFO] [stderr] 162 |     let xerrperstrip = (xerr as f64)/(xstrips as f64);
[INFO] [stderr]     |                                      ^^^^^^^^^^^^^^^^ help: try: `f64::from(xstrips)`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: casting i32 to f64 may become silently lossy if types change
[INFO] [stderr]    --> src/lib.rs:163:24
[INFO] [stderr]     |
[INFO] [stderr] 163 |     let yerrperstrip = (yerr as f64)/(ystrips as f64);
[INFO] [stderr]     |                        ^^^^^^^^^^^^^ help: try: `f64::from(yerr)`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: casting i32 to f64 may become silently lossy if types change
[INFO] [stderr]    --> src/lib.rs:163:38
[INFO] [stderr]     |
[INFO] [stderr] 163 |     let yerrperstrip = (yerr as f64)/(ystrips as f64);
[INFO] [stderr]     |                                      ^^^^^^^^^^^^^^^^ help: try: `f64::from(ystrips)`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: casting i32 to f64 may become silently lossy if types change
[INFO] [stderr]    --> src/lib.rs:178:19
[INFO] [stderr]     |
[INFO] [stderr] 178 |         let ye = ((y as f64) * yerrperstrip) as i32;
[INFO] [stderr]     |                   ^^^^^^^^^^ help: try: `f64::from(y)`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: casting i32 to f64 may become silently lossy if types change
[INFO] [stderr]    --> src/lib.rs:182:23
[INFO] [stderr]     |
[INFO] [stderr] 182 |             let xe = ((x as f64) * xerrperstrip) as i32;
[INFO] [stderr]     |                       ^^^^^^^^^^ help: try: `f64::from(x)`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: casting i32 to f64 may become silently lossy if types change
[INFO] [stderr]    --> src/lib.rs:188:20
[INFO] [stderr]     |
[INFO] [stderr] 188 |                 x: (x*step+xoff+xe) as f64,
[INFO] [stderr]     |                    ^^^^^^^^^^^^^^^^^^^^^^^ help: try: `f64::from(x*step+xoff+xe)`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: casting i32 to f64 may become silently lossy if types change
[INFO] [stderr]    --> src/lib.rs:189:20
[INFO] [stderr]     |
[INFO] [stderr] 189 |                 y: (y*step+yoff+ye) as f64,
[INFO] [stderr]     |                    ^^^^^^^^^^^^^^^^^^^^^^^ help: try: `f64::from(y*step+yoff+ye)`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[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/lib.rs:199:14
[INFO] [stderr]     |
[INFO] [stderr] 199 |     lab_vec: & Vec<LABColor>,
[INFO] [stderr]     |              ^^^^^^^^^^^^^^^ help: change this to: `&[LABColor]`
[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: unneeded return statement
[INFO] [stderr]   --> src/lib.rs:54:5
[INFO] [stderr]    |
[INFO] [stderr] 54 | /     return if val <= 0.04045 {
[INFO] [stderr] 55 | |             val/12.92
[INFO] [stderr] 56 | |         } else {
[INFO] [stderr] 57 | |             ((val+0.055)/1.055).powf(2.4)
[INFO] [stderr] 58 | |         };
[INFO] [stderr]    | |__________^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::needless_return)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] help: remove `return` as shown
[INFO] [stderr]    |
[INFO] [stderr] 54 |     if val <= 0.04045 {
[INFO] [stderr] 55 |             val/12.92
[INFO] [stderr] 56 |         } else {
[INFO] [stderr] 57 |             ((val+0.055)/1.055).powf(2.4)
[INFO] [stderr] 58 |         }
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: long literal lacking separators
[INFO] [stderr]   --> src/lib.rs:74:14
[INFO] [stderr]    |
[INFO] [stderr] 74 |         x: r*0.4124564 + g*0.3575761 + b*0.1804375,
[INFO] [stderr]    |              ^^^^^^^^^ help: consider: `0.412_456_4`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::unreadable_literal)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unreadable_literal
[INFO] [stderr] 
[INFO] [stderr] warning: long literal lacking separators
[INFO] [stderr]   --> src/lib.rs:74:28
[INFO] [stderr]    |
[INFO] [stderr] 74 |         x: r*0.4124564 + g*0.3575761 + b*0.1804375,
[INFO] [stderr]    |                            ^^^^^^^^^ help: consider: `0.357_576_1`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unreadable_literal
[INFO] [stderr] 
[INFO] [stderr] warning: long literal lacking separators
[INFO] [stderr]   --> src/lib.rs:74:42
[INFO] [stderr]    |
[INFO] [stderr] 74 |         x: r*0.4124564 + g*0.3575761 + b*0.1804375,
[INFO] [stderr]    |                                          ^^^^^^^^^ help: consider: `0.180_437_5`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unreadable_literal
[INFO] [stderr] 
[INFO] [stderr] warning: long literal lacking separators
[INFO] [stderr]   --> src/lib.rs:75:14
[INFO] [stderr]    |
[INFO] [stderr] 75 |         y: r*0.2126729 + g*0.7151522 + b*0.0721750,
[INFO] [stderr]    |              ^^^^^^^^^ help: consider: `0.212_672_9`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unreadable_literal
[INFO] [stderr] 
[INFO] [stderr] warning: long literal lacking separators
[INFO] [stderr]   --> src/lib.rs:75:28
[INFO] [stderr]    |
[INFO] [stderr] 75 |         y: r*0.2126729 + g*0.7151522 + b*0.0721750,
[INFO] [stderr]    |                            ^^^^^^^^^ help: consider: `0.715_152_2`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unreadable_literal
[INFO] [stderr] 
[INFO] [stderr] warning: long literal lacking separators
[INFO] [stderr]   --> src/lib.rs:75:42
[INFO] [stderr]    |
[INFO] [stderr] 75 |         y: r*0.2126729 + g*0.7151522 + b*0.0721750,
[INFO] [stderr]    |                                          ^^^^^^^^^ help: consider: `0.072_175_0`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unreadable_literal
[INFO] [stderr] 
[INFO] [stderr] warning: long literal lacking separators
[INFO] [stderr]   --> src/lib.rs:76:14
[INFO] [stderr]    |
[INFO] [stderr] 76 |         z: r*0.0193339 + g*0.1191920 + b*0.9503041,
[INFO] [stderr]    |              ^^^^^^^^^ help: consider: `0.019_333_9`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unreadable_literal
[INFO] [stderr] 
[INFO] [stderr] warning: long literal lacking separators
[INFO] [stderr]   --> src/lib.rs:76:28
[INFO] [stderr]    |
[INFO] [stderr] 76 |         z: r*0.0193339 + g*0.1191920 + b*0.9503041,
[INFO] [stderr]    |                            ^^^^^^^^^ help: consider: `0.119_192_0`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unreadable_literal
[INFO] [stderr] 
[INFO] [stderr] warning: long literal lacking separators
[INFO] [stderr]   --> src/lib.rs:76:42
[INFO] [stderr]    |
[INFO] [stderr] 76 |         z: r*0.0193339 + g*0.1191920 + b*0.9503041,
[INFO] [stderr]    |                                          ^^^^^^^^^ help: consider: `0.950_304_1`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unreadable_literal
[INFO] [stderr] 
[INFO] [stderr] warning: long literal lacking separators
[INFO] [stderr]   --> src/lib.rs:87:19
[INFO] [stderr]    |
[INFO] [stderr] 87 |     let epsilon = 0.008856;
[INFO] [stderr]    |                   ^^^^^^^^ help: consider: `0.008_856`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unreadable_literal
[INFO] [stderr] 
[INFO] [stderr] warning: long literal lacking separators
[INFO] [stderr]   --> src/lib.rs:91:34
[INFO] [stderr]    |
[INFO] [stderr] 91 |     let xyz_white = XYZColor{x : 0.950456, y: 1.0, z: 1.088754};
[INFO] [stderr]    |                                  ^^^^^^^^ help: consider: `0.950_456`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unreadable_literal
[INFO] [stderr] 
[INFO] [stderr] warning: long literal lacking separators
[INFO] [stderr]   --> src/lib.rs:91:55
[INFO] [stderr]    |
[INFO] [stderr] 91 |     let xyz_white = XYZColor{x : 0.950456, y: 1.0, z: 1.088754};
[INFO] [stderr]    |                                                       ^^^^^^^^ help: consider: `1.088_754`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unreadable_literal
[INFO] [stderr] 
[INFO] [stderr] warning: casting i32 to f64 may become silently lossy if types change
[INFO] [stderr]    --> src/lib.rs:230:25
[INFO] [stderr]     |
[INFO] [stderr] 230 |     let invwt = 1.0 / ((step as f64/compactness)*(step as f64/compactness));
[INFO] [stderr]     |                         ^^^^^^^^^^^ help: try: `f64::from(step)`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: casting i32 to f64 may become silently lossy if types change
[INFO] [stderr]    --> src/lib.rs:230:51
[INFO] [stderr]     |
[INFO] [stderr] 230 |     let invwt = 1.0 / ((step as f64/compactness)*(step as f64/compactness));
[INFO] [stderr]     |                                                   ^^^^^^^^^^^ help: try: `f64::from(step)`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/lib.rs:550:5
[INFO] [stderr]     |
[INFO] [stderr] 550 |     return *numlabels;
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `*numlabels`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/lib.rs:566:5
[INFO] [stderr]     |
[INFO] [stderr] 566 | /     return do_segmentation_with_superpixel_size(
[INFO] [stderr] 567 | |         img, lab_vec, width, height, klabels, &mut numlabels, superpixel_size as u32, compactness, iterations);
[INFO] [stderr]     | |_______________________________________________________________________________________________________________^
[INFO] [stderr] warning: the loop variable `n` is used to index `seeds_vec`
[INFO] [stderr]    --> src/lib.rs:241:18
[INFO] [stderr]     |
[INFO] [stderr] 241 |         for n in 0..numk
[INFO] [stderr]     |                  ^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::needless_range_loop)] on by default
[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: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] help: consider using an iterator
[INFO] [stderr] help: remove `return` as shown
[INFO] [stderr]     |
[INFO] [stderr] 566 |     do_segmentation_with_superpixel_size(
[INFO] [stderr] 567 |         img, lab_vec, width, height, klabels, &mut numlabels, superpixel_size as u32, compactness, iterations)
[INFO] [stderr]     |
[INFO] [stderr]     |
[INFO] [stderr] 241 |         for (n, <item>) in seeds_vec.iter().enumerate().take(numk)
[INFO] [stderr]     |             ^^^^^^^^^^^    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] 
[INFO] [stderr] warning: `ref` on an entire `let` pattern is discouraged, take a reference with `&` instead
[INFO] [stderr]    --> src/lib.rs:243:17
[INFO] [stderr]     |
[INFO] [stderr] 243 |             let ref s = seeds_vec[n];
[INFO] [stderr]     |             ----^^^^^---------------- help: try: `let s = &seeds_vec[n];`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::toplevel_ref_arg)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#toplevel_ref_arg
[INFO] [stderr] 
[INFO] [stderr] warning: long literal lacking separators
[INFO] [stderr]    --> src/lib.rs:588:26
[INFO] [stderr]     |
[INFO] [stderr] 588 |         almost_eq(xyz.x, 0.7714801);
[INFO] [stderr]     |                          ^^^^^^^^^ help: consider: `0.771_480_1`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unreadable_literal
[INFO] [stderr] 
[INFO] [stderr] warning: long literal lacking separators
[INFO] [stderr]    --> src/lib.rs:589:26
[INFO] [stderr]     |
[INFO] [stderr] 589 |         almost_eq(xyz.y, 0.9284041);
[INFO] [stderr]     |                          ^^^^^^^^^ help: consider: `0.928_404_1`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unreadable_literal
[INFO] [stderr] 
[INFO] [stderr] warning: long literal lacking separators
[INFO] [stderr]    --> src/lib.rs:590:26
[INFO] [stderr]     |
[INFO] [stderr] 590 |         almost_eq(xyz.z, 0.1461503);
[INFO] [stderr]     |                          ^^^^^^^^^ help: consider: `0.146_150_3`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unreadable_literal
[INFO] [stderr] 
[INFO] [stderr] warning: long literal lacking separators
[INFO] [stderr]    --> src/lib.rs:600:26
[INFO] [stderr]     |
[INFO] [stderr] 600 |         almost_eq(lab.l, 97.1627998);
[INFO] [stderr]     |                          ^^^^^^^^^^ help: consider: `97.162_799_8`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unreadable_literal
[INFO] [stderr] 
[INFO] [stderr] warning: long literal lacking separators
[INFO] [stderr]    --> src/lib.rs:601:27
[INFO] [stderr]     |
[INFO] [stderr] 601 |         almost_eq(lab.a, -21.3609707);
[INFO] [stderr]     |                           ^^^^^^^^^^ help: consider: `21.360_970_7`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unreadable_literal
[INFO] [stderr] 
[INFO] [stderr] warning: long literal lacking separators
[INFO] [stderr]    --> src/lib.rs:602:26
[INFO] [stderr]     |
[INFO] [stderr] 602 |         almost_eq(lab.b, 92.7035375);
[INFO] [stderr]     |                          ^^^^^^^^^^ help: consider: `92.703_537_5`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unreadable_literal
[INFO] [stderr] 
[INFO] [stderr] warning: `ref` on an entire `let` pattern is discouraged, take a reference with `&` instead
[INFO] [stderr]    --> src/lib.rs:265:29
[INFO] [stderr]     |
[INFO] [stderr] 265 |                         let ref c = s.lab;
[INFO] [stderr]     |                         ----^^^^^--------- help: try: `let c = &s.lab;`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#toplevel_ref_arg
[INFO] [stderr] 
[INFO] [stderr] warning: casting u32 to f64 may become silently lossy if types change
[INFO] [stderr]    --> src/lib.rs:271:39
[INFO] [stderr]     |
[INFO] [stderr] 271 |                         dist_xyz =        ((x as f64 - s.x)*(x as f64 - s.x) +
[INFO] [stderr]     |                                             ^^^^^^^^ help: try: `f64::from(x)`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: casting u32 to f64 may become silently lossy if types change
[INFO] [stderr]    --> src/lib.rs:271:56
[INFO] [stderr]     |
[INFO] [stderr] 271 |                         dist_xyz =        ((x as f64 - s.x)*(x as f64 - s.x) +
[INFO] [stderr]     |                                                              ^^^^^^^^ help: try: `f64::from(x)`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: casting u32 to f64 may become silently lossy if types change
[INFO] [stderr]    --> src/lib.rs:272:42
[INFO] [stderr]     |
[INFO] [stderr] 272 |                                         (y as f64 - s.y)*(y as f64 - s.y) +
[INFO] [stderr]     |                                          ^^^^^^^^ help: try: `f64::from(y)`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: casting u32 to f64 may become silently lossy if types change
[INFO] [stderr]    --> src/lib.rs:272:59
[INFO] [stderr]     |
[INFO] [stderr] 272 |                                         (y as f64 - s.y)*(y as f64 - s.y) +
[INFO] [stderr]     |                                                           ^^^^^^^^ help: try: `f64::from(y)`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: casting u32 to f64 may become silently lossy if types change
[INFO] [stderr]    --> src/lib.rs:273:42
[INFO] [stderr]     |
[INFO] [stderr] 273 |                                         (z as f64 - s.z)*(z as f64 - s.z)) as f64;
[INFO] [stderr]     |                                          ^^^^^^^^ help: try: `f64::from(z)`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: casting u32 to f64 may become silently lossy if types change
[INFO] [stderr]    --> src/lib.rs:273:59
[INFO] [stderr]     |
[INFO] [stderr] 273 |                                         (z as f64 - s.z)*(z as f64 - s.z)) as f64;
[INFO] [stderr]     |                                                           ^^^^^^^^ help: try: `f64::from(z)`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: casting i32 to f64 may become silently lossy if types change
[INFO] [stderr]    --> src/lib.rs:307:35
[INFO] [stderr]     |
[INFO] [stderr] 307 |                     sigma_x[l] += c as f64;
[INFO] [stderr]     |                                   ^^^^^^^^ help: try: `f64::from(c)`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: casting i32 to f64 may become silently lossy if types change
[INFO] [stderr]    --> src/lib.rs:308:35
[INFO] [stderr]     |
[INFO] [stderr] 308 |                     sigma_y[l] += r as f64;
[INFO] [stderr]     |                                   ^^^^^^^^ help: try: `f64::from(r)`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: casting i32 to f64 may become silently lossy if types change
[INFO] [stderr]    --> src/lib.rs:309:35
[INFO] [stderr]     |
[INFO] [stderr] 309 |                     sigma_z[l] += d as f64;
[INFO] [stderr]     |                                   ^^^^^^^^ help: try: `f64::from(d)`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: this argument is passed by reference, but would be more efficient if passed by value
[INFO] [stderr]    --> src/lib.rs:344:11
[INFO] [stderr]     |
[INFO] [stderr] 344 |     step: &usize
[INFO] [stderr]     |           ^^^^^^ help: consider passing by value instead: `usize`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::trivially_copy_pass_by_ref)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#trivially_copy_pass_by_ref
[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/lib.rs:438:14
[INFO] [stderr]     |
[INFO] [stderr] 438 |     klabels: &Vec<i32>,
[INFO] [stderr]     |              ^^^^^^^^^ help: change this to: `&[i32]`
[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: this argument is passed by reference, but would be more efficient if passed by value
[INFO] [stderr]    --> src/lib.rs:440:20
[INFO] [stderr]     |
[INFO] [stderr] 440 |     outline_color: &image::Rgb<u8>
[INFO] [stderr]     |                    ^^^^^^^^^^^^^^^ help: consider passing by value instead: `image::Rgb<u8>`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#trivially_copy_pass_by_ref
[INFO] [stderr] 
[INFO] [stderr] warning: this let-binding has unit value. Consider omitting `let _ =`
[INFO] [stderr]    --> src/lib.rs:458:5
[INFO] [stderr]     |
[INFO] [stderr] 458 |     let _ = mean_img.save(&Path::new(out_fn)).unwrap();
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::let_unit_value)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#let_unit_value
[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/lib.rs:464:14
[INFO] [stderr]     |
[INFO] [stderr] 464 |     klabels: &Vec<i32>,
[INFO] [stderr]     |              ^^^^^^^^^ help: change this to: `&[i32]`
[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: this argument is passed by reference, but would be more efficient if passed by value
[INFO] [stderr]    --> src/lib.rs:466:20
[INFO] [stderr]     |
[INFO] [stderr] 466 |     outline_color: &image::Rgb<u8>
[INFO] [stderr]     |                    ^^^^^^^^^^^^^^^ help: consider passing by value instead: `image::Rgb<u8>`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#trivially_copy_pass_by_ref
[INFO] [stderr] 
[INFO] [stderr] error: this `if` has identical blocks
[INFO] [stderr]    --> src/lib.rs:494:75
[INFO] [stderr]     |
[INFO] [stderr] 494 |               } else if klabels[left_idx as usize] != klabels[idx as usize] {
[INFO] [stderr]     |  ___________________________________________________________________________^
[INFO] [stderr] 495 | |                 contour.put_pixel(x, y, *outline_color);
[INFO] [stderr] 496 | |             } else {
[INFO] [stderr]     | |_____________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[deny(clippy::if_same_then_else)] on by default
[INFO] [stderr] note: same as this
[INFO] [stderr]    --> src/lib.rs:492:66
[INFO] [stderr]     |
[INFO] [stderr] 492 |               if klabels[up_idx as usize] != klabels[idx as usize] {
[INFO] [stderr]     |  __________________________________________________________________^
[INFO] [stderr] 493 | |                 contour.put_pixel(x, y, *outline_color);
[INFO] [stderr] 494 | |             } else if klabels[left_idx as usize] != klabels[idx as usize] {
[INFO] [stderr]     | |_____________^
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#if_same_then_else
[INFO] [stderr] 
[INFO] [stderr] warning: this let-binding has unit value. Consider omitting `let _ =`
[INFO] [stderr]    --> src/lib.rs:504:5
[INFO] [stderr]     |
[INFO] [stderr] 504 |     let _ = contour.save(&Path::new(out_fn)).unwrap();
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#let_unit_value
[INFO] [stderr] 
[INFO] [stderr] warning: this function has too many arguments (9/7)
[INFO] [stderr]    --> src/lib.rs:507:1
[INFO] [stderr]     |
[INFO] [stderr] 507 | / pub fn do_segmentation_with_superpixel_size(
[INFO] [stderr] 508 | |     img: & image::RgbImage,
[INFO] [stderr] 509 | |     lab_vec: &mut Vec<LABColor>,
[INFO] [stderr] 510 | |     width: u32,
[INFO] [stderr] ...   |
[INFO] [stderr] 550 | |     return *numlabels;
[INFO] [stderr] 551 | | }
[INFO] [stderr]     | |_^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::too_many_arguments)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#too_many_arguments
[INFO] [stderr] 
[INFO] [stderr] warning: casting u32 to f64 may become silently lossy if types change
[INFO] [stderr]    --> src/lib.rs:520:22
[INFO] [stderr]     |
[INFO] [stderr] 520 |     let step: u32 = ((superpixel_size as f64).sqrt()+0.5) as u32;
[INFO] [stderr]     |                      ^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `f64::from(superpixel_size)`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: it looks like you're manually copying between slices
[INFO] [stderr]    --> src/lib.rs:545:14
[INFO] [stderr]     |
[INFO] [stderr] 545 |     for x in 0usize..(sz as usize) {
[INFO] [stderr]     |              ^^^^^^^^^^^^^^^^^^^^^ help: try replacing the loop by: `klabels[0usize..(sz as usize)].clone_from_slice(&new_labels[0usize..(sz as usize)])`
[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: this function has too many arguments (8/7)
[INFO] [stderr]    --> src/lib.rs:553:1
[INFO] [stderr]     |
[INFO] [stderr] 553 | / pub fn do_segmentation_with_num_superpixels(
[INFO] [stderr] 554 | |     img: & image::RgbImage,
[INFO] [stderr] 555 | |     lab_vec: &mut Vec<LABColor>,
[INFO] [stderr] 556 | |     width: u32,
[INFO] [stderr] ...   |
[INFO] [stderr] 567 | |         img, lab_vec, width, height, klabels, &mut numlabels, superpixel_size as u32, compactness, iterations);
[INFO] [stderr] 568 | | }
[INFO] [stderr]     | |_^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#too_many_arguments
[INFO] [stderr] 
[INFO] [stderr] warning: casting u32 to f64 may become silently lossy if types change
[INFO] [stderr]    --> src/lib.rs:565:39
[INFO] [stderr]     |
[INFO] [stderr] 565 |     let superpixel_size : f64 = 0.5 + (width*height) as f64 / num_superpixels as f64;
[INFO] [stderr]     |                                       ^^^^^^^^^^^^^^^^^^^^^ help: try: `f64::from(width*height)`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: casting u32 to f64 may become silently lossy if types change
[INFO] [stderr]    --> src/lib.rs:565:63
[INFO] [stderr]     |
[INFO] [stderr] 565 |     let superpixel_size : f64 = 0.5 + (width*height) as f64 / num_superpixels as f64;
[INFO] [stderr]     |                                                               ^^^^^^^^^^^^^^^^^^^^^^ help: try: `f64::from(num_superpixels)`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] error: Could not compile `superpixel`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] warning: unused variable: `idx`
[INFO] [stderr]    --> src/lib.rs:451:17
[INFO] [stderr]     |
[INFO] [stderr] 451 |             let idx = y * width + x;
[INFO] [stderr]     |                 ^^^ help: consider using `_idx` instead
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `klabels`
[INFO] [stderr]    --> src/lib.rs:438:5
[INFO] [stderr]     |
[INFO] [stderr] 438 |     klabels: &Vec<i32>,
[INFO] [stderr]     |     ^^^^^^^ help: consider using `_klabels` instead
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `outline_color`
[INFO] [stderr]    --> src/lib.rs:440:5
[INFO] [stderr]     |
[INFO] [stderr] 440 |     outline_color: &image::Rgb<u8>
[INFO] [stderr]     |     ^^^^^^^^^^^^^ help: consider using `_outline_color` instead
[INFO] [stderr] 
[INFO] [stderr] warning: casting u8 to f64 may become silently lossy if types change
[INFO] [stderr]   --> src/lib.rs:65:23
[INFO] [stderr]    |
[INFO] [stderr] 65 |     let mut r : f64 = (sr as f64) / 255.0;
[INFO] [stderr]    |                       ^^^^^^^^^^^ help: try: `f64::from(sr)`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::cast_lossless)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: casting u8 to f64 may become silently lossy if types change
[INFO] [stderr]   --> src/lib.rs:66:23
[INFO] [stderr]    |
[INFO] [stderr] 66 |     let mut g : f64 = (sg as f64) / 255.0;
[INFO] [stderr]    |                       ^^^^^^^^^^^ help: try: `f64::from(sg)`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: casting u8 to f64 may become silently lossy if types change
[INFO] [stderr]   --> src/lib.rs:67:23
[INFO] [stderr]    |
[INFO] [stderr] 67 |     let mut b : f64 = (sb as f64) / 255.0;
[INFO] [stderr]    |                       ^^^^^^^^^^^ help: try: `f64::from(sb)`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[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/lib.rs:141:14
[INFO] [stderr]     |
[INFO] [stderr] 141 |     lab_vec: & Vec<LABColor>,
[INFO] [stderr]     |              ^^^^^^^^^^^^^^^ help: change this to: `&[LABColor]`
[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: casting i32 to f64 may become silently lossy if types change
[INFO] [stderr]    --> src/lib.rs:145:13
[INFO] [stderr]     |
[INFO] [stderr] 145 |     let s = step as f64;
[INFO] [stderr]     |             ^^^^^^^^^^^ help: try: `f64::from(step)`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: casting i32 to f64 may become silently lossy if types change
[INFO] [stderr]    --> src/lib.rs:147:30
[INFO] [stderr]     |
[INFO] [stderr] 147 |     let mut xstrips = (0.5 + (width as f64)/s) as i32;
[INFO] [stderr]     |                              ^^^^^^^^^^^^^^ help: try: `f64::from(width)`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: casting i32 to f64 may become silently lossy if types change
[INFO] [stderr]    --> src/lib.rs:148:30
[INFO] [stderr]     |
[INFO] [stderr] 148 |     let mut ystrips = (0.5 + (height as f64)/s) as i32;
[INFO] [stderr]     |                              ^^^^^^^^^^^^^^^ help: try: `f64::from(height)`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: casting i32 to f64 may become silently lossy if types change
[INFO] [stderr]    --> src/lib.rs:162:24
[INFO] [stderr]     |
[INFO] [stderr] 162 |     let xerrperstrip = (xerr as f64)/(xstrips as f64);
[INFO] [stderr]     |                        ^^^^^^^^^^^^^ help: try: `f64::from(xerr)`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: casting i32 to f64 may become silently lossy if types change
[INFO] [stderr]    --> src/lib.rs:162:38
[INFO] [stderr]     |
[INFO] [stderr] 162 |     let xerrperstrip = (xerr as f64)/(xstrips as f64);
[INFO] [stderr]     |                                      ^^^^^^^^^^^^^^^^ help: try: `f64::from(xstrips)`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: casting i32 to f64 may become silently lossy if types change
[INFO] [stderr]    --> src/lib.rs:163:24
[INFO] [stderr]     |
[INFO] [stderr] 163 |     let yerrperstrip = (yerr as f64)/(ystrips as f64);
[INFO] [stderr]     |                        ^^^^^^^^^^^^^ help: try: `f64::from(yerr)`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: casting i32 to f64 may become silently lossy if types change
[INFO] [stderr]    --> src/lib.rs:163:38
[INFO] [stderr]     |
[INFO] [stderr] 163 |     let yerrperstrip = (yerr as f64)/(ystrips as f64);
[INFO] [stderr]     |                                      ^^^^^^^^^^^^^^^^ help: try: `f64::from(ystrips)`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: casting i32 to f64 may become silently lossy if types change
[INFO] [stderr]    --> src/lib.rs:178:19
[INFO] [stderr]     |
[INFO] [stderr] 178 |         let ye = ((y as f64) * yerrperstrip) as i32;
[INFO] [stderr]     |                   ^^^^^^^^^^ help: try: `f64::from(y)`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: casting i32 to f64 may become silently lossy if types change
[INFO] [stderr]    --> src/lib.rs:182:23
[INFO] [stderr]     |
[INFO] [stderr] 182 |             let xe = ((x as f64) * xerrperstrip) as i32;
[INFO] [stderr]     |                       ^^^^^^^^^^ help: try: `f64::from(x)`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: casting i32 to f64 may become silently lossy if types change
[INFO] [stderr]    --> src/lib.rs:188:20
[INFO] [stderr]     |
[INFO] [stderr] 188 |                 x: (x*step+xoff+xe) as f64,
[INFO] [stderr]     |                    ^^^^^^^^^^^^^^^^^^^^^^^ help: try: `f64::from(x*step+xoff+xe)`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: casting i32 to f64 may become silently lossy if types change
[INFO] [stderr]    --> src/lib.rs:189:20
[INFO] [stderr]     |
[INFO] [stderr] 189 |                 y: (y*step+yoff+ye) as f64,
[INFO] [stderr]     |                    ^^^^^^^^^^^^^^^^^^^^^^^ help: try: `f64::from(y*step+yoff+ye)`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[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/lib.rs:199:14
[INFO] [stderr]     |
[INFO] [stderr] 199 |     lab_vec: & Vec<LABColor>,
[INFO] [stderr]     |              ^^^^^^^^^^^^^^^ help: change this to: `&[LABColor]`
[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: casting i32 to f64 may become silently lossy if types change
[INFO] [stderr]    --> src/lib.rs:230:25
[INFO] [stderr]     |
[INFO] [stderr] 230 |     let invwt = 1.0 / ((step as f64/compactness)*(step as f64/compactness));
[INFO] [stderr]     |                         ^^^^^^^^^^^ help: try: `f64::from(step)`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: casting i32 to f64 may become silently lossy if types change
[INFO] [stderr]    --> src/lib.rs:230:51
[INFO] [stderr]     |
[INFO] [stderr] 230 |     let invwt = 1.0 / ((step as f64/compactness)*(step as f64/compactness));
[INFO] [stderr]     |                                                   ^^^^^^^^^^^ help: try: `f64::from(step)`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: the loop variable `n` is used to index `seeds_vec`
[INFO] [stderr]    --> src/lib.rs:241:18
[INFO] [stderr]     |
[INFO] [stderr] 241 |         for n in 0..numk
[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] 241 |         for (n, <item>) in seeds_vec.iter().enumerate().take(numk)
[INFO] [stderr]     |             ^^^^^^^^^^^    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `ref` on an entire `let` pattern is discouraged, take a reference with `&` instead
[INFO] [stderr]    --> src/lib.rs:243:17
[INFO] [stderr]     |
[INFO] [stderr] 243 |             let ref s = seeds_vec[n];
[INFO] [stderr]     |             ----^^^^^---------------- help: try: `let s = &seeds_vec[n];`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::toplevel_ref_arg)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#toplevel_ref_arg
[INFO] [stderr] 
[INFO] [stderr] warning: `ref` on an entire `let` pattern is discouraged, take a reference with `&` instead
[INFO] [stderr]    --> src/lib.rs:265:29
[INFO] [stderr]     |
[INFO] [stderr] 265 |                         let ref c = s.lab;
[INFO] [stderr]     |                         ----^^^^^--------- help: try: `let c = &s.lab;`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#toplevel_ref_arg
[INFO] [stderr] 
[INFO] [stderr] warning: casting u32 to f64 may become silently lossy if types change
[INFO] [stderr]    --> src/lib.rs:271:39
[INFO] [stderr]     |
[INFO] [stderr] 271 |                         dist_xyz =        ((x as f64 - s.x)*(x as f64 - s.x) +
[INFO] [stderr]     |                                             ^^^^^^^^ help: try: `f64::from(x)`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: casting u32 to f64 may become silently lossy if types change
[INFO] [stderr]    --> src/lib.rs:271:56
[INFO] [stderr]     |
[INFO] [stderr] 271 |                         dist_xyz =        ((x as f64 - s.x)*(x as f64 - s.x) +
[INFO] [stderr]     |                                                              ^^^^^^^^ help: try: `f64::from(x)`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: casting u32 to f64 may become silently lossy if types change
[INFO] [stderr]    --> src/lib.rs:272:42
[INFO] [stderr]     |
[INFO] [stderr] 272 |                                         (y as f64 - s.y)*(y as f64 - s.y) +
[INFO] [stderr]     |                                          ^^^^^^^^ help: try: `f64::from(y)`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: casting u32 to f64 may become silently lossy if types change
[INFO] [stderr]    --> src/lib.rs:272:59
[INFO] [stderr]     |
[INFO] [stderr] 272 |                                         (y as f64 - s.y)*(y as f64 - s.y) +
[INFO] [stderr]     |                                                           ^^^^^^^^ help: try: `f64::from(y)`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: casting u32 to f64 may become silently lossy if types change
[INFO] [stderr]    --> src/lib.rs:273:42
[INFO] [stderr]     |
[INFO] [stderr] 273 |                                         (z as f64 - s.z)*(z as f64 - s.z)) as f64;
[INFO] [stderr]     |                                          ^^^^^^^^ help: try: `f64::from(z)`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: casting u32 to f64 may become silently lossy if types change
[INFO] [stderr]    --> src/lib.rs:273:59
[INFO] [stderr]     |
[INFO] [stderr] 273 |                                         (z as f64 - s.z)*(z as f64 - s.z)) as f64;
[INFO] [stderr]     |                                                           ^^^^^^^^ help: try: `f64::from(z)`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: casting i32 to f64 may become silently lossy if types change
[INFO] [stderr]    --> src/lib.rs:307:35
[INFO] [stderr]     |
[INFO] [stderr] 307 |                     sigma_x[l] += c as f64;
[INFO] [stderr]     |                                   ^^^^^^^^ help: try: `f64::from(c)`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: casting i32 to f64 may become silently lossy if types change
[INFO] [stderr]    --> src/lib.rs:308:35
[INFO] [stderr]     |
[INFO] [stderr] 308 |                     sigma_y[l] += r as f64;
[INFO] [stderr]     |                                   ^^^^^^^^ help: try: `f64::from(r)`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: casting i32 to f64 may become silently lossy if types change
[INFO] [stderr]    --> src/lib.rs:309:35
[INFO] [stderr]     |
[INFO] [stderr] 309 |                     sigma_z[l] += d as f64;
[INFO] [stderr]     |                                   ^^^^^^^^ help: try: `f64::from(d)`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: this argument is passed by reference, but would be more efficient if passed by value
[INFO] [stderr]    --> src/lib.rs:344:11
[INFO] [stderr]     |
[INFO] [stderr] 344 |     step: &usize
[INFO] [stderr]     |           ^^^^^^ help: consider passing by value instead: `usize`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::trivially_copy_pass_by_ref)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#trivially_copy_pass_by_ref
[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/lib.rs:438:14
[INFO] [stderr]     |
[INFO] [stderr] 438 |     klabels: &Vec<i32>,
[INFO] [stderr]     |              ^^^^^^^^^ help: change this to: `&[i32]`
[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: this argument is passed by reference, but would be more efficient if passed by value
[INFO] [stderr]    --> src/lib.rs:440:20
[INFO] [stderr]     |
[INFO] [stderr] 440 |     outline_color: &image::Rgb<u8>
[INFO] [stderr]     |                    ^^^^^^^^^^^^^^^ help: consider passing by value instead: `image::Rgb<u8>`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#trivially_copy_pass_by_ref
[INFO] [stderr] 
[INFO] [stderr] warning: this let-binding has unit value. Consider omitting `let _ =`
[INFO] [stderr]    --> src/lib.rs:458:5
[INFO] [stderr]     |
[INFO] [stderr] 458 |     let _ = mean_img.save(&Path::new(out_fn)).unwrap();
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::let_unit_value)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#let_unit_value
[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/lib.rs:464:14
[INFO] [stderr]     |
[INFO] [stderr] 464 |     klabels: &Vec<i32>,
[INFO] [stderr]     |              ^^^^^^^^^ help: change this to: `&[i32]`
[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: this argument is passed by reference, but would be more efficient if passed by value
[INFO] [stderr]    --> src/lib.rs:466:20
[INFO] [stderr]     |
[INFO] [stderr] 466 |     outline_color: &image::Rgb<u8>
[INFO] [stderr]     |                    ^^^^^^^^^^^^^^^ help: consider passing by value instead: `image::Rgb<u8>`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#trivially_copy_pass_by_ref
[INFO] [stderr] 
[INFO] [stderr] error: this `if` has identical blocks
[INFO] [stderr]    --> src/lib.rs:494:75
[INFO] [stderr]     |
[INFO] [stderr] 494 |               } else if klabels[left_idx as usize] != klabels[idx as usize] {
[INFO] [stderr]     |  ___________________________________________________________________________^
[INFO] [stderr] 495 | |                 contour.put_pixel(x, y, *outline_color);
[INFO] [stderr] 496 | |             } else {
[INFO] [stderr]     | |_____________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[deny(clippy::if_same_then_else)] on by default
[INFO] [stderr] note: same as this
[INFO] [stderr]    --> src/lib.rs:492:66
[INFO] [stderr]     |
[INFO] [stderr] 492 |               if klabels[up_idx as usize] != klabels[idx as usize] {
[INFO] [stderr]     |  __________________________________________________________________^
[INFO] [stderr] 493 | |                 contour.put_pixel(x, y, *outline_color);
[INFO] [stderr] 494 | |             } else if klabels[left_idx as usize] != klabels[idx as usize] {
[INFO] [stderr]     | |_____________^
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#if_same_then_else
[INFO] [stderr] 
[INFO] [stderr] warning: this let-binding has unit value. Consider omitting `let _ =`
[INFO] [stderr]    --> src/lib.rs:504:5
[INFO] [stderr]     |
[INFO] [stderr] 504 |     let _ = contour.save(&Path::new(out_fn)).unwrap();
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#let_unit_value
[INFO] [stderr] 
[INFO] [stderr] warning: this function has too many arguments (9/7)
[INFO] [stderr]    --> src/lib.rs:507:1
[INFO] [stderr]     |
[INFO] [stderr] 507 | / pub fn do_segmentation_with_superpixel_size(
[INFO] [stderr] 508 | |     img: & image::RgbImage,
[INFO] [stderr] 509 | |     lab_vec: &mut Vec<LABColor>,
[INFO] [stderr] 510 | |     width: u32,
[INFO] [stderr] ...   |
[INFO] [stderr] 550 | |     return *numlabels;
[INFO] [stderr] 551 | | }
[INFO] [stderr]     | |_^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::too_many_arguments)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#too_many_arguments
[INFO] [stderr] 
[INFO] [stderr] warning: casting u32 to f64 may become silently lossy if types change
[INFO] [stderr]    --> src/lib.rs:520:22
[INFO] [stderr]     |
[INFO] [stderr] 520 |     let step: u32 = ((superpixel_size as f64).sqrt()+0.5) as u32;
[INFO] [stderr]     |                      ^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `f64::from(superpixel_size)`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: it looks like you're manually copying between slices
[INFO] [stderr]    --> src/lib.rs:545:14
[INFO] [stderr]     |
[INFO] [stderr] 545 |     for x in 0usize..(sz as usize) {
[INFO] [stderr]     |              ^^^^^^^^^^^^^^^^^^^^^ help: try replacing the loop by: `klabels[0usize..(sz as usize)].clone_from_slice(&new_labels[0usize..(sz as usize)])`
[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: this function has too many arguments (8/7)
[INFO] [stderr]    --> src/lib.rs:553:1
[INFO] [stderr]     |
[INFO] [stderr] 553 | / pub fn do_segmentation_with_num_superpixels(
[INFO] [stderr] 554 | |     img: & image::RgbImage,
[INFO] [stderr] 555 | |     lab_vec: &mut Vec<LABColor>,
[INFO] [stderr] 556 | |     width: u32,
[INFO] [stderr] ...   |
[INFO] [stderr] 567 | |         img, lab_vec, width, height, klabels, &mut numlabels, superpixel_size as u32, compactness, iterations);
[INFO] [stderr] 568 | | }
[INFO] [stderr]     | |_^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#too_many_arguments
[INFO] [stderr] 
[INFO] [stderr] warning: casting u32 to f64 may become silently lossy if types change
[INFO] [stderr]    --> src/lib.rs:565:39
[INFO] [stderr]     |
[INFO] [stderr] 565 |     let superpixel_size : f64 = 0.5 + (width*height) as f64 / num_superpixels as f64;
[INFO] [stderr]     |                                       ^^^^^^^^^^^^^^^^^^^^^ help: try: `f64::from(width*height)`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: casting u32 to f64 may become silently lossy if types change
[INFO] [stderr]    --> src/lib.rs:565:63
[INFO] [stderr]     |
[INFO] [stderr] 565 |     let superpixel_size : f64 = 0.5 + (width*height) as f64 / num_superpixels as f64;
[INFO] [stderr]     |                                                               ^^^^^^^^^^^^^^^^^^^^^^ help: try: `f64::from(num_superpixels)`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] error: Could not compile `superpixel`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "b2bb38afef8fe0cc358cb12254d9b35550c3cdbc3d880729fa6fba64a8e4c35a"`
[INFO] running `"docker" "rm" "-f" "b2bb38afef8fe0cc358cb12254d9b35550c3cdbc3d880729fa6fba64a8e4c35a"`
[INFO] [stdout] b2bb38afef8fe0cc358cb12254d9b35550c3cdbc3d880729fa6fba64a8e4c35a