[INFO] updating cached repository lmwnshn/tutorial-mandelbrot
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/lmwnshn/tutorial-mandelbrot
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/lmwnshn/tutorial-mandelbrot" "work/ex/clippy-test-run/sources/stable/gh/lmwnshn/tutorial-mandelbrot"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable/gh/lmwnshn/tutorial-mandelbrot'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/lmwnshn/tutorial-mandelbrot" "work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/lmwnshn/tutorial-mandelbrot"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/lmwnshn/tutorial-mandelbrot'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] facc58e7559e8ce891776d8ef44347ee298e35fb
[INFO] sha for GitHub repo lmwnshn/tutorial-mandelbrot: facc58e7559e8ce891776d8ef44347ee298e35fb
[INFO] validating manifest of lmwnshn/tutorial-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 lmwnshn/tutorial-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 lmwnshn/tutorial-mandelbrot
[INFO] finished frobbing lmwnshn/tutorial-mandelbrot
[INFO] frobbed toml for lmwnshn/tutorial-mandelbrot written to work/ex/clippy-test-run/sources/stable/gh/lmwnshn/tutorial-mandelbrot/Cargo.toml
[INFO] started frobbing lmwnshn/tutorial-mandelbrot
[INFO] finished frobbing lmwnshn/tutorial-mandelbrot
[INFO] frobbed toml for lmwnshn/tutorial-mandelbrot written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/lmwnshn/tutorial-mandelbrot/Cargo.toml
[INFO] crate lmwnshn/tutorial-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 lmwnshn/tutorial-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/lmwnshn/tutorial-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] b734aecc241a17ebff1de87874aa8000a23d1e6303eaf8fe2fd641884ba7f69d
[INFO] running `"docker" "start" "-a" "b734aecc241a17ebff1de87874aa8000a23d1e6303eaf8fe2fd641884ba7f69d"`
[INFO] [stderr]     Checking num-bigint v0.1.41
[INFO] [stderr]     Checking png v0.7.0
[INFO] [stderr]     Checking num-rational v0.1.40
[INFO] [stderr]     Checking num v0.1.41
[INFO] [stderr]     Checking image v0.13.0
[INFO] [stderr]     Checking tutorial-mandelbrot v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: use of `writeln!(stderr(), ...).unwrap()`. Consider using `eprintln!` instead
[INFO] [stderr]    --> src/main.rs:100:9
[INFO] [stderr]     |
[INFO] [stderr] 100 | /         writeln!(std::io::stderr(),
[INFO] [stderr] 101 | |                  "Usage: mandelbrot FILE PIXELS TOP_LEFT BOT_RIGHT")
[INFO] [stderr] 102 | |             .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:103:9
[INFO] [stderr]     |
[INFO] [stderr] 103 | /         writeln!(std::io::stderr(),
[INFO] [stderr] 104 | |                 "e.g. {} mandel.png 1000x750 -1.20,0.35 -1,0.20",
[INFO] [stderr] 105 | |                 args[0])
[INFO] [stderr] 106 | |             .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:100:9
[INFO] [stderr]     |
[INFO] [stderr] 100 | /         writeln!(std::io::stderr(),
[INFO] [stderr] 101 | |                  "Usage: mandelbrot FILE PIXELS TOP_LEFT BOT_RIGHT")
[INFO] [stderr] 102 | |             .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:103:9
[INFO] [stderr]     |
[INFO] [stderr] 103 | /         writeln!(std::io::stderr(),
[INFO] [stderr] 104 | |                 "e.g. {} mandel.png 1000x750 -1.20,0.35 -1,0.20",
[INFO] [stderr] 105 | |                 args[0])
[INFO] [stderr] 106 | |             .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 12.51s
[INFO] running `"docker" "inspect" "b734aecc241a17ebff1de87874aa8000a23d1e6303eaf8fe2fd641884ba7f69d"`
[INFO] running `"docker" "rm" "-f" "b734aecc241a17ebff1de87874aa8000a23d1e6303eaf8fe2fd641884ba7f69d"`
[INFO] [stdout] b734aecc241a17ebff1de87874aa8000a23d1e6303eaf8fe2fd641884ba7f69d