[INFO] updating cached repository planet0104/edge_detection
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/planet0104/edge_detection
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/planet0104/edge_detection" "work/ex/clippy-test-run/sources/stable/gh/planet0104/edge_detection"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable/gh/planet0104/edge_detection'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/planet0104/edge_detection" "work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/planet0104/edge_detection"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/planet0104/edge_detection'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 308648b1b6a46ec725779e0a4ee15e608d970ac8
[INFO] sha for GitHub repo planet0104/edge_detection: 308648b1b6a46ec725779e0a4ee15e608d970ac8
[INFO] validating manifest of planet0104/edge_detection 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 planet0104/edge_detection 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 planet0104/edge_detection
[INFO] finished frobbing planet0104/edge_detection
[INFO] frobbed toml for planet0104/edge_detection written to work/ex/clippy-test-run/sources/stable/gh/planet0104/edge_detection/Cargo.toml
[INFO] started frobbing planet0104/edge_detection
[INFO] finished frobbing planet0104/edge_detection
[INFO] frobbed toml for planet0104/edge_detection written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/planet0104/edge_detection/Cargo.toml
[INFO] crate planet0104/edge_detection has a lockfile. skipping
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on the registry index
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] linting planet0104/edge_detection against stable+rustflags=-Dclippy::into_iter_on_array for clippy-test-run
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/clippy-test-run/worker-2/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/planet0104/edge_detection:/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 -Dclippy::into_iter_on_array" "-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] 5fcaa95b61fc09d8171b2c1e17c0b70bf3299ff98ad2c09ced9503abd0d2ea46
[INFO] running `"docker" "start" "-a" "5fcaa95b61fc09d8171b2c1e17c0b70bf3299ff98ad2c09ced9503abd0d2ea46"`
[INFO] [stderr]     Checking rgb v0.8.7
[INFO] [stderr]     Checking lodepng v2.1.2
[INFO] [stderr]     Checking image_contrast v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: writing `&Vec<_>` instead of `&[_]` involves one more reference and cannot be used with non-Vec-based slices.
[INFO] [stderr]   --> src/main.rs:20:26
[INFO] [stderr]    |
[INFO] [stderr] 20 | fn edge_detection(buffer:&Vec<RGB<u8>>, width:usize, height:usize, threshold:f32)->Vec<RGB<u8>>{
[INFO] [stderr]    |                          ^^^^^^^^^^^^^ help: change this to: `&[RGB<u8>]`
[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: this argument is passed by reference, but would be more efficient if passed by value
[INFO] [stderr]   --> src/main.rs:48:21
[INFO] [stderr]    |
[INFO] [stderr] 48 | fn calc_pixel(pixel:&RGB<u8>, out:f32, threshold:f32)->f32{
[INFO] [stderr]    |                     ^^^^^^^^ help: consider passing by value instead: `RGB<u8>`
[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: casting u8 to f32 may become silently lossy if types change
[INFO] [stderr]   --> src/main.rs:50:14
[INFO] [stderr]    |
[INFO] [stderr] 50 |     if 0.299*pixel.r as f32+0.587*pixel.g as f32+0.114*pixel.b as f32>threshold{
[INFO] [stderr]    |              ^^^^^^^^^^^^^^ help: try: `f32::from(pixel.r)`
[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 f32 may become silently lossy if types change
[INFO] [stderr]   --> src/main.rs:50:35
[INFO] [stderr]    |
[INFO] [stderr] 50 |     if 0.299*pixel.r as f32+0.587*pixel.g as f32+0.114*pixel.b as f32>threshold{
[INFO] [stderr]    |                                   ^^^^^^^^^^^^^^ help: try: `f32::from(pixel.g)`
[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 f32 may become silently lossy if types change
[INFO] [stderr]   --> src/main.rs:50:56
[INFO] [stderr]    |
[INFO] [stderr] 50 |     if 0.299*pixel.r as f32+0.587*pixel.g as f32+0.114*pixel.b as f32>threshold{
[INFO] [stderr]    |                                                        ^^^^^^^^^^^^^^ help: try: `f32::from(pixel.b)`
[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/main.rs:20:26
[INFO] [stderr]    |
[INFO] [stderr] 20 | fn edge_detection(buffer:&Vec<RGB<u8>>, width:usize, height:usize, threshold:f32)->Vec<RGB<u8>>{
[INFO] [stderr]    |                          ^^^^^^^^^^^^^ help: change this to: `&[RGB<u8>]`
[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: this argument is passed by reference, but would be more efficient if passed by value
[INFO] [stderr]   --> src/main.rs:48:21
[INFO] [stderr]    |
[INFO] [stderr] 48 | fn calc_pixel(pixel:&RGB<u8>, out:f32, threshold:f32)->f32{
[INFO] [stderr]    |                     ^^^^^^^^ help: consider passing by value instead: `RGB<u8>`
[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: casting u8 to f32 may become silently lossy if types change
[INFO] [stderr]   --> src/main.rs:50:14
[INFO] [stderr]    |
[INFO] [stderr] 50 |     if 0.299*pixel.r as f32+0.587*pixel.g as f32+0.114*pixel.b as f32>threshold{
[INFO] [stderr]    |              ^^^^^^^^^^^^^^ help: try: `f32::from(pixel.r)`
[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 f32 may become silently lossy if types change
[INFO] [stderr]   --> src/main.rs:50:35
[INFO] [stderr]    |
[INFO] [stderr] 50 |     if 0.299*pixel.r as f32+0.587*pixel.g as f32+0.114*pixel.b as f32>threshold{
[INFO] [stderr]    |                                   ^^^^^^^^^^^^^^ help: try: `f32::from(pixel.g)`
[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 f32 may become silently lossy if types change
[INFO] [stderr]   --> src/main.rs:50:56
[INFO] [stderr]    |
[INFO] [stderr] 50 |     if 0.299*pixel.r as f32+0.587*pixel.g as f32+0.114*pixel.b as f32>threshold{
[INFO] [stderr]    |                                                        ^^^^^^^^^^^^^^ help: try: `f32::from(pixel.b)`
[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]     Finished dev [unoptimized + debuginfo] target(s) in 3.17s
[INFO] running `"docker" "inspect" "5fcaa95b61fc09d8171b2c1e17c0b70bf3299ff98ad2c09ced9503abd0d2ea46"`
[INFO] running `"docker" "rm" "-f" "5fcaa95b61fc09d8171b2c1e17c0b70bf3299ff98ad2c09ced9503abd0d2ea46"`
[INFO] [stdout] 5fcaa95b61fc09d8171b2c1e17c0b70bf3299ff98ad2c09ced9503abd0d2ea46