[INFO] updating cached repository DogLi/mandelbrot
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/DogLi/mandelbrot
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/DogLi/mandelbrot" "work/ex/clippy-test-run/sources/stable/gh/DogLi/mandelbrot"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable/gh/DogLi/mandelbrot'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/DogLi/mandelbrot" "work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/DogLi/mandelbrot"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/DogLi/mandelbrot'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] f1acadc97a90751a22262ab4d3750ee3a76a196d
[INFO] sha for GitHub repo DogLi/mandelbrot: f1acadc97a90751a22262ab4d3750ee3a76a196d
[INFO] validating manifest of DogLi/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 DogLi/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 DogLi/mandelbrot
[INFO] finished frobbing DogLi/mandelbrot
[INFO] frobbed toml for DogLi/mandelbrot written to work/ex/clippy-test-run/sources/stable/gh/DogLi/mandelbrot/Cargo.toml
[INFO] started frobbing DogLi/mandelbrot
[INFO] finished frobbing DogLi/mandelbrot
[INFO] frobbed toml for DogLi/mandelbrot written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/DogLi/mandelbrot/Cargo.toml
[INFO] crate DogLi/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 DogLi/mandelbrot against stable for clippy-test-run
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/clippy-test-run/worker-5/stable:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/clippy-test-run/sources/stable/gh/DogLi/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] 19f128d800b4df4bc18e8750e0f1ad77ca93ff58ceb8086ff10b56054f6e576b
[INFO] running `"docker" "start" "-a" "19f128d800b4df4bc18e8750e0f1ad77ca93ff58ceb8086ff10b56054f6e576b"`
[INFO] [stderr]     Checking image v0.17.0
[INFO] [stderr]     Checking mandelbrot v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: casting u32 to f64 may become silently lossy if types change
[INFO] [stderr]   --> src/color.rs:37:26
[INFO] [stderr]    |
[INFO] [stderr] 37 |             let mut v = (i as f64 + R - z.norm_sqr().sqrt().log2().log2()).log2() / 5.0;
[INFO] [stderr]    |                          ^^^^^^^^ help: try: `f64::from(i)`
[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 u32 to f64 may become silently lossy if types change
[INFO] [stderr]   --> src/color.rs:37:26
[INFO] [stderr]    |
[INFO] [stderr] 37 |             let mut v = (i as f64 + R - z.norm_sqr().sqrt().log2().log2()).log2() / 5.0;
[INFO] [stderr]    |                          ^^^^^^^^ help: try: `f64::from(i)`
[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]     Finished dev [unoptimized + debuginfo] target(s) in 13.03s
[INFO] running `"docker" "inspect" "19f128d800b4df4bc18e8750e0f1ad77ca93ff58ceb8086ff10b56054f6e576b"`
[INFO] running `"docker" "rm" "-f" "19f128d800b4df4bc18e8750e0f1ad77ca93ff58ceb8086ff10b56054f6e576b"`
[INFO] [stdout] 19f128d800b4df4bc18e8750e0f1ad77ca93ff58ceb8086ff10b56054f6e576b