[INFO] updating cached repository mokomull/adventofcode_2018
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/mokomull/adventofcode_2018
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/mokomull/adventofcode_2018" "work/ex/clippy-test-run/sources/stable/gh/mokomull/adventofcode_2018"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable/gh/mokomull/adventofcode_2018'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/mokomull/adventofcode_2018" "work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/mokomull/adventofcode_2018"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/mokomull/adventofcode_2018'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 764bdc3b0b39b86d774374de1da9736c222e5bed
[INFO] sha for GitHub repo mokomull/adventofcode_2018: 764bdc3b0b39b86d774374de1da9736c222e5bed
[INFO] validating manifest of mokomull/adventofcode_2018 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 mokomull/adventofcode_2018 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 mokomull/adventofcode_2018
[INFO] finished frobbing mokomull/adventofcode_2018
[INFO] frobbed toml for mokomull/adventofcode_2018 written to work/ex/clippy-test-run/sources/stable/gh/mokomull/adventofcode_2018/Cargo.toml
[INFO] started frobbing mokomull/adventofcode_2018
[INFO] finished frobbing mokomull/adventofcode_2018
[INFO] frobbed toml for mokomull/adventofcode_2018 written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/mokomull/adventofcode_2018/Cargo.toml
[INFO] crate mokomull/adventofcode_2018 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 mokomull/adventofcode_2018 against stable for clippy-test-run
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/clippy-test-run/worker-0/stable:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/clippy-test-run/sources/stable/gh/mokomull/adventofcode_2018:/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] d445c1ce0b74a5ec8fbeab16ca32cdbe595f97245acc279022c587ae8b2843aa
[INFO] running `"docker" "start" "-a" "d445c1ce0b74a5ec8fbeab16ca32cdbe595f97245acc279022c587ae8b2843aa"`
[INFO] [stderr]    Compiling memchr v2.1.1
[INFO] [stderr]     Checking nom v4.1.1
[INFO] [stderr]     Checking adventofcode_2018 v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: the loop variable `y` is only used to index `board`.
[INFO] [stderr]   --> src/bin/day_06.rs:13:18
[INFO] [stderr]    |
[INFO] [stderr] 13 |         for y in 0..=max_y {
[INFO] [stderr]    |                  ^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::needless_range_loop)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_range_loop
[INFO] [stderr] help: consider using an iterator
[INFO] [stderr]    |
[INFO] [stderr] 13 |         for <item> in board.iter_mut().take(max_y + 1) {
[INFO] [stderr]    |             ^^^^^^    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: length comparison to zero
[INFO] [stderr]   --> src/bin/day_06.rs:27:16
[INFO] [stderr]    |
[INFO] [stderr] 27 |             if distances.len() > 0 {
[INFO] [stderr]    |                ^^^^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `!distances.is_empty()`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::len_zero)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_zero
[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/bin/day_06.rs:36:25
[INFO] [stderr]    |
[INFO] [stderr] 36 | fn largest_area(placed: &Vec<Vec<Option<usize>>>) -> usize {
[INFO] [stderr]    |                         ^^^^^^^^^^^^^^^^^^^^^^^^ help: change this to: `&[Vec<Option<usize>>]`
[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: single-character string constant used as pattern
[INFO] [stderr]    --> src/bin/day_06.rs:102:25
[INFO] [stderr]     |
[INFO] [stderr] 102 |                 l.split(",").nth(0).unwrap().parse::<usize>().unwrap(),
[INFO] [stderr]     |                         ^^^ help: try using a char instead: `','`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::single_char_pattern)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_char_pattern
[INFO] [stderr] 
[INFO] [stderr] warning: single-character string constant used as pattern
[INFO] [stderr]    --> src/bin/day_06.rs:103:25
[INFO] [stderr]     |
[INFO] [stderr] 103 |                 l.split(" ").nth(1).unwrap().parse::<usize>().unwrap(),
[INFO] [stderr]     |                         ^^^ help: try using a char instead: `' '`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_char_pattern
[INFO] [stderr] 
[INFO] [stderr] warning: the loop variable `y` is only used to index `board`.
[INFO] [stderr]   --> src/bin/day_06.rs:13:18
[INFO] [stderr]    |
[INFO] [stderr] 13 |         for y in 0..=max_y {
[INFO] [stderr]    |                  ^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::needless_range_loop)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_range_loop
[INFO] [stderr] help: consider using an iterator
[INFO] [stderr]    |
[INFO] [stderr] 13 |         for <item> in board.iter_mut().take(max_y + 1) {
[INFO] [stderr]    |             ^^^^^^    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: length comparison to zero
[INFO] [stderr]   --> src/bin/day_06.rs:27:16
[INFO] [stderr]    |
[INFO] [stderr] 27 |             if distances.len() > 0 {
[INFO] [stderr]    |                ^^^^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `!distances.is_empty()`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::len_zero)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_zero
[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/bin/day_06.rs:36:25
[INFO] [stderr]    |
[INFO] [stderr] 36 | fn largest_area(placed: &Vec<Vec<Option<usize>>>) -> usize {
[INFO] [stderr]    |                         ^^^^^^^^^^^^^^^^^^^^^^^^ help: change this to: `&[Vec<Option<usize>>]`
[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: single-character string constant used as pattern
[INFO] [stderr]    --> src/bin/day_06.rs:102:25
[INFO] [stderr]     |
[INFO] [stderr] 102 |                 l.split(",").nth(0).unwrap().parse::<usize>().unwrap(),
[INFO] [stderr]     |                         ^^^ help: try using a char instead: `','`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::single_char_pattern)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_char_pattern
[INFO] [stderr] 
[INFO] [stderr] warning: single-character string constant used as pattern
[INFO] [stderr]    --> src/bin/day_06.rs:103:25
[INFO] [stderr]     |
[INFO] [stderr] 103 |                 l.split(" ").nth(1).unwrap().parse::<usize>().unwrap(),
[INFO] [stderr]     |                         ^^^ help: try using a char instead: `' '`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_char_pattern
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 6.25s
[INFO] running `"docker" "inspect" "d445c1ce0b74a5ec8fbeab16ca32cdbe595f97245acc279022c587ae8b2843aa"`
[INFO] running `"docker" "rm" "-f" "d445c1ce0b74a5ec8fbeab16ca32cdbe595f97245acc279022c587ae8b2843aa"`
[INFO] [stdout] d445c1ce0b74a5ec8fbeab16ca32cdbe595f97245acc279022c587ae8b2843aa