[INFO] updating cached repository EarvinKayonga/mandelbrot
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/EarvinKayonga/mandelbrot
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/EarvinKayonga/mandelbrot" "work/ex/clippy-test-run/sources/stable/gh/EarvinKayonga/mandelbrot"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable/gh/EarvinKayonga/mandelbrot'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/EarvinKayonga/mandelbrot" "work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/EarvinKayonga/mandelbrot"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/EarvinKayonga/mandelbrot'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 16094c8eb2baa37fcfb28bd25091c7cfbabe1870
[INFO] sha for GitHub repo EarvinKayonga/mandelbrot: 16094c8eb2baa37fcfb28bd25091c7cfbabe1870
[INFO] validating manifest of EarvinKayonga/mandelbrot 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 EarvinKayonga/mandelbrot 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 EarvinKayonga/mandelbrot
[INFO] finished frobbing EarvinKayonga/mandelbrot
[INFO] frobbed toml for EarvinKayonga/mandelbrot written to work/ex/clippy-test-run/sources/stable/gh/EarvinKayonga/mandelbrot/Cargo.toml
[INFO] started frobbing EarvinKayonga/mandelbrot
[INFO] finished frobbing EarvinKayonga/mandelbrot
[INFO] frobbed toml for EarvinKayonga/mandelbrot written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/EarvinKayonga/mandelbrot/Cargo.toml
[INFO] crate EarvinKayonga/mandelbrot 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 EarvinKayonga/mandelbrot against stable for clippy-test-run
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/clippy-test-run/worker-3/stable:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/clippy-test-run/sources/stable/gh/EarvinKayonga/mandelbrot:/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] 3ff22116b0756b60cf351abe9eb0e43e89861d1ee40506774e4bce9fd82c1ae6
[INFO] running `"docker" "start" "-a" "3ff22116b0756b60cf351abe9eb0e43e89861d1ee40506774e4bce9fd82c1ae6"`
[INFO] [stderr]     Checking num-bigint v0.1.44
[INFO] [stderr]     Checking flate2 v0.2.20
[INFO] [stderr]     Checking jpeg-decoder v0.1.15
[INFO] [stderr]     Checking png v0.5.2
[INFO] [stderr]     Checking num-rational v0.1.42
[INFO] [stderr]     Checking image v0.10.4
[INFO] [stderr]     Checking raster v0.2.0
[INFO] [stderr]     Checking mandelbrot v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: returning the result of a let binding from a block. Consider returning the expression directly.
[INFO] [stderr]   --> src/main.rs:60:5
[INFO] [stderr]    |
[INFO] [stderr] 60 |     color
[INFO] [stderr]    |     ^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::let_and_return)] on by default
[INFO] [stderr] note: this expression can be directly returned
[INFO] [stderr]   --> src/main.rs:59:17
[INFO] [stderr]    |
[INFO] [stderr] 59 |     let color = gray(x as u8);
[INFO] [stderr]    |                 ^^^^^^^^^^^^^
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#let_and_return
[INFO] [stderr] 
[INFO] [stderr] warning: casting i32 to f64 may become silently lossy if types change
[INFO] [stderr]   --> src/main.rs:68:19
[INFO] [stderr]    |
[INFO] [stderr] 68 |     (max - min) * (x as f64) / (total as f64) - max
[INFO] [stderr]    |                   ^^^^^^^^^^ help: try: `f64::from(x)`
[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 i32 to f64 may become silently lossy if types change
[INFO] [stderr]   --> src/main.rs:68:32
[INFO] [stderr]    |
[INFO] [stderr] 68 |     (max - min) * (x as f64) / (total as f64) - max
[INFO] [stderr]    |                                ^^^^^^^^^^^^^^ help: try: `f64::from(total)`
[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: returning the result of a let binding from a block. Consider returning the expression directly.
[INFO] [stderr]   --> src/main.rs:60:5
[INFO] [stderr]    |
[INFO] [stderr] 60 |     color
[INFO] [stderr]    |     ^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::let_and_return)] on by default
[INFO] [stderr] note: this expression can be directly returned
[INFO] [stderr]   --> src/main.rs:59:17
[INFO] [stderr]    |
[INFO] [stderr] 59 |     let color = gray(x as u8);
[INFO] [stderr]    |                 ^^^^^^^^^^^^^
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#let_and_return
[INFO] [stderr] 
[INFO] [stderr] warning: casting i32 to f64 may become silently lossy if types change
[INFO] [stderr]   --> src/main.rs:68:19
[INFO] [stderr]    |
[INFO] [stderr] 68 |     (max - min) * (x as f64) / (total as f64) - max
[INFO] [stderr]    |                   ^^^^^^^^^^ help: try: `f64::from(x)`
[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 i32 to f64 may become silently lossy if types change
[INFO] [stderr]   --> src/main.rs:68:32
[INFO] [stderr]    |
[INFO] [stderr] 68 |     (max - min) * (x as f64) / (total as f64) - max
[INFO] [stderr]    |                                ^^^^^^^^^^^^^^ help: try: `f64::from(total)`
[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 14.83s
[INFO] running `"docker" "inspect" "3ff22116b0756b60cf351abe9eb0e43e89861d1ee40506774e4bce9fd82c1ae6"`
[INFO] running `"docker" "rm" "-f" "3ff22116b0756b60cf351abe9eb0e43e89861d1ee40506774e4bce9fd82c1ae6"`
[INFO] [stdout] 3ff22116b0756b60cf351abe9eb0e43e89861d1ee40506774e4bce9fd82c1ae6