[INFO] updating cached repository shmutalov/growingtree-maze
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/shmutalov/growingtree-maze
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/shmutalov/growingtree-maze" "work/ex/clippy-test-run/sources/stable/gh/shmutalov/growingtree-maze"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable/gh/shmutalov/growingtree-maze'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/shmutalov/growingtree-maze" "work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/shmutalov/growingtree-maze"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/shmutalov/growingtree-maze'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 52d79d954b1aaf81899d599e1452d4428547cc0a
[INFO] sha for GitHub repo shmutalov/growingtree-maze: 52d79d954b1aaf81899d599e1452d4428547cc0a
[INFO] validating manifest of shmutalov/growingtree-maze 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 shmutalov/growingtree-maze 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 shmutalov/growingtree-maze
[INFO] finished frobbing shmutalov/growingtree-maze
[INFO] frobbed toml for shmutalov/growingtree-maze written to work/ex/clippy-test-run/sources/stable/gh/shmutalov/growingtree-maze/Cargo.toml
[INFO] started frobbing shmutalov/growingtree-maze
[INFO] finished frobbing shmutalov/growingtree-maze
[INFO] frobbed toml for shmutalov/growingtree-maze written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/shmutalov/growingtree-maze/Cargo.toml
[INFO] crate shmutalov/growingtree-maze 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 shmutalov/growingtree-maze against stable for clippy-test-run
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/clippy-test-run/worker-4/stable:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/clippy-test-run/sources/stable/gh/shmutalov/growingtree-maze:/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] 9f172d88d8a3fc563493700d7ba8954f1015f75506f4b385c7023f29becedb68
[INFO] running `"docker" "start" "-a" "9f172d88d8a3fc563493700d7ba8954f1015f75506f4b385c7023f29becedb68"`
[INFO] [stderr]     Checking libc v0.2.24
[INFO] [stderr]     Checking rand v0.3.15
[INFO] [stderr]     Checking growingtree-maze v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]   --> src/growing_tree_maze.rs:38:13
[INFO] [stderr]    |
[INFO] [stderr] 38 |             width: width,
[INFO] [stderr]    |             ^^^^^^^^^^^^ help: replace it with: `width`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::redundant_field_names)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]   --> src/growing_tree_maze.rs:39:13
[INFO] [stderr]    |
[INFO] [stderr] 39 |             height: height,
[INFO] [stderr]    |             ^^^^^^^^^^^^^^ help: replace it with: `height`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]   --> src/growing_tree_maze.rs:38:13
[INFO] [stderr]    |
[INFO] [stderr] 38 |             width: width,
[INFO] [stderr]    |             ^^^^^^^^^^^^ help: replace it with: `width`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::redundant_field_names)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]   --> src/growing_tree_maze.rs:39:13
[INFO] [stderr]    |
[INFO] [stderr] 39 |             height: height,
[INFO] [stderr]    |             ^^^^^^^^^^^^^^ help: replace it with: `height`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/growing_tree_maze.rs:162:13
[INFO] [stderr]     |
[INFO] [stderr] 162 |             return [1, 2, 4, 8].contains(&edgestate)
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `[1, 2, 4, 8].contains(&edgestate)`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::needless_return)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/growing_tree_maze.rs:162:13
[INFO] [stderr]     |
[INFO] [stderr] 162 |             return [1, 2, 4, 8].contains(&edgestate)
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `[1, 2, 4, 8].contains(&edgestate)`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::needless_return)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: length comparison to zero
[INFO] [stderr]    --> src/growing_tree_maze.rs:177:15
[INFO] [stderr]     |
[INFO] [stderr] 177 |         while frontier.len() > 0 {
[INFO] [stderr]     |               ^^^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `!frontier.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: length comparison to zero
[INFO] [stderr]    --> src/growing_tree_maze.rs:177:15
[INFO] [stderr]     |
[INFO] [stderr] 177 |         while frontier.len() > 0 {
[INFO] [stderr]     |               ^^^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `!frontier.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]     Finished dev [unoptimized + debuginfo] target(s) in 4.17s
[INFO] running `"docker" "inspect" "9f172d88d8a3fc563493700d7ba8954f1015f75506f4b385c7023f29becedb68"`
[INFO] running `"docker" "rm" "-f" "9f172d88d8a3fc563493700d7ba8954f1015f75506f4b385c7023f29becedb68"`
[INFO] [stdout] 9f172d88d8a3fc563493700d7ba8954f1015f75506f4b385c7023f29becedb68