[INFO] updating cached repository avranju/rust-mandelbrot
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/avranju/rust-mandelbrot
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/avranju/rust-mandelbrot" "work/ex/clippy-test-run/sources/stable/gh/avranju/rust-mandelbrot"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable/gh/avranju/rust-mandelbrot'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/avranju/rust-mandelbrot" "work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/avranju/rust-mandelbrot"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/avranju/rust-mandelbrot'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] f3387cf0807fbe71c466df8a6c16c9e47fe7a17b
[INFO] sha for GitHub repo avranju/rust-mandelbrot: f3387cf0807fbe71c466df8a6c16c9e47fe7a17b
[INFO] validating manifest of avranju/rust-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 avranju/rust-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 avranju/rust-mandelbrot
[INFO] finished frobbing avranju/rust-mandelbrot
[INFO] frobbed toml for avranju/rust-mandelbrot written to work/ex/clippy-test-run/sources/stable/gh/avranju/rust-mandelbrot/Cargo.toml
[INFO] started frobbing avranju/rust-mandelbrot
[INFO] finished frobbing avranju/rust-mandelbrot
[INFO] frobbed toml for avranju/rust-mandelbrot written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/avranju/rust-mandelbrot/Cargo.toml
[INFO] crate avranju/rust-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 avranju/rust-mandelbrot against stable for clippy-test-run
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/clippy-test-run/worker-7/stable:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/clippy-test-run/sources/stable/gh/avranju/rust-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] c02c2f30ec5640b1335ba7b9aec27c58d89527a74775abd4d5de3225af253a56
[INFO] running `"docker" "start" "-a" "c02c2f30ec5640b1335ba7b9aec27c58d89527a74775abd4d5de3225af253a56"`
[INFO] [stderr]     Checking crossbeam v0.3.0
[INFO] [stderr]     Checking rayon-core v1.3.0
[INFO] [stderr]     Checking rayon v0.8.2
[INFO] [stderr]     Checking jpeg-decoder v0.1.13
[INFO] [stderr]     Checking image v0.17.0
[INFO] [stderr]     Checking mandelbrot v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: use of `writeln!(stderr(), ...).unwrap()`. Consider using `eprintln!` instead
[INFO] [stderr]   --> src/main.rs:17:9
[INFO] [stderr]    |
[INFO] [stderr] 17 | /         writeln!(
[INFO] [stderr] 18 | |             std::io::stderr(),
[INFO] [stderr] 19 | |             "Usage: {} FILE PIXELS UPPERLEFT LOWERRIGHT",
[INFO] [stderr] 20 | |             args[0]
[INFO] [stderr] 21 | |         ).unwrap();
[INFO] [stderr]    | |__________________^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::explicit_write)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#explicit_write
[INFO] [stderr] 
[INFO] [stderr] warning: use of `writeln!(stderr(), ...).unwrap()`. Consider using `eprintln!` instead
[INFO] [stderr]   --> src/main.rs:22:9
[INFO] [stderr]    |
[INFO] [stderr] 22 | /         writeln!(
[INFO] [stderr] 23 | |             std::io::stderr(),
[INFO] [stderr] 24 | |             "Example: {} mandel.png 1000x750 -1.20,0.35 -1,0.20",
[INFO] [stderr] 25 | |             args[0]
[INFO] [stderr] 26 | |         ).unwrap();
[INFO] [stderr]    | |__________________^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#explicit_write
[INFO] [stderr] 
[INFO] [stderr] warning: use of `writeln!(stderr(), ...).unwrap()`. Consider using `eprintln!` instead
[INFO] [stderr]   --> src/main.rs:17:9
[INFO] [stderr]    |
[INFO] [stderr] 17 | /         writeln!(
[INFO] [stderr] 18 | |             std::io::stderr(),
[INFO] [stderr] 19 | |             "Usage: {} FILE PIXELS UPPERLEFT LOWERRIGHT",
[INFO] [stderr] 20 | |             args[0]
[INFO] [stderr] 21 | |         ).unwrap();
[INFO] [stderr]    | |__________________^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::explicit_write)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#explicit_write
[INFO] [stderr] 
[INFO] [stderr] warning: use of `writeln!(stderr(), ...).unwrap()`. Consider using `eprintln!` instead
[INFO] [stderr]   --> src/main.rs:22:9
[INFO] [stderr]    |
[INFO] [stderr] 22 | /         writeln!(
[INFO] [stderr] 23 | |             std::io::stderr(),
[INFO] [stderr] 24 | |             "Example: {} mandel.png 1000x750 -1.20,0.35 -1,0.20",
[INFO] [stderr] 25 | |             args[0]
[INFO] [stderr] 26 | |         ).unwrap();
[INFO] [stderr]    | |__________________^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#explicit_write
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 13.49s
[INFO] running `"docker" "inspect" "c02c2f30ec5640b1335ba7b9aec27c58d89527a74775abd4d5de3225af253a56"`
[INFO] running `"docker" "rm" "-f" "c02c2f30ec5640b1335ba7b9aec27c58d89527a74775abd4d5de3225af253a56"`
[INFO] [stdout] c02c2f30ec5640b1335ba7b9aec27c58d89527a74775abd4d5de3225af253a56