[INFO] updating cached repository terakun/spanning_tree_maze
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/terakun/spanning_tree_maze
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/terakun/spanning_tree_maze" "work/ex/clippy-test-run/sources/stable/gh/terakun/spanning_tree_maze"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable/gh/terakun/spanning_tree_maze'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/terakun/spanning_tree_maze" "work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/terakun/spanning_tree_maze"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/terakun/spanning_tree_maze'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 7d76ea3667cf2b8d531d7634fb620d8387038961
[INFO] sha for GitHub repo terakun/spanning_tree_maze: 7d76ea3667cf2b8d531d7634fb620d8387038961
[INFO] validating manifest of terakun/spanning_tree_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 terakun/spanning_tree_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 terakun/spanning_tree_maze
[INFO] finished frobbing terakun/spanning_tree_maze
[INFO] frobbed toml for terakun/spanning_tree_maze written to work/ex/clippy-test-run/sources/stable/gh/terakun/spanning_tree_maze/Cargo.toml
[INFO] started frobbing terakun/spanning_tree_maze
[INFO] finished frobbing terakun/spanning_tree_maze
[INFO] frobbed toml for terakun/spanning_tree_maze written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/terakun/spanning_tree_maze/Cargo.toml
[INFO] crate terakun/spanning_tree_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 terakun/spanning_tree_maze against stable+rustflags=-Dclippy::into_iter_on_array for clippy-test-run
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/clippy-test-run/worker-3/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/terakun/spanning_tree_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 -Dclippy::into_iter_on_array" "-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] 7ca164b9858828cbabfe244abb680134f8e599e434ecaaea484b4fa78c4c308e
[INFO] running `"docker" "start" "-a" "7ca164b9858828cbabfe244abb680134f8e599e434ecaaea484b4fa78c4c308e"`
[INFO] [stderr]     Checking spanning_tree_maze v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]   --> src/maze/mod.rs:75:13
[INFO] [stderr]    |
[INFO] [stderr] 75 |             rows: rows,
[INFO] [stderr]    |             ^^^^^^^^^^ help: replace it with: `rows`
[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/maze/mod.rs:76:13
[INFO] [stderr]    |
[INFO] [stderr] 76 |             cols: cols,
[INFO] [stderr]    |             ^^^^^^^^^^ help: replace it with: `cols`
[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/maze/mod.rs:77:13
[INFO] [stderr]    |
[INFO] [stderr] 77 |             map: map,
[INFO] [stderr]    |             ^^^^^^^^ help: replace it with: `map`
[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: using `println!("")`
[INFO] [stderr]   --> src/maze/mod.rs:90:13
[INFO] [stderr]    |
[INFO] [stderr] 90 |             println!("");
[INFO] [stderr]    |             ^^^^^^^^^^^^ help: replace it with: `println!()`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::println_empty_string)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#println_empty_string
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]   --> src/maze/mod.rs:75:13
[INFO] [stderr]    |
[INFO] [stderr] 75 |             rows: rows,
[INFO] [stderr]    |             ^^^^^^^^^^ help: replace it with: `rows`
[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/maze/mod.rs:76:13
[INFO] [stderr]    |
[INFO] [stderr] 76 |             cols: cols,
[INFO] [stderr]    |             ^^^^^^^^^^ help: replace it with: `cols`
[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/maze/mod.rs:77:13
[INFO] [stderr]    |
[INFO] [stderr] 77 |             map: map,
[INFO] [stderr]    |             ^^^^^^^^ help: replace it with: `map`
[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: using `println!("")`
[INFO] [stderr]   --> src/maze/mod.rs:90:13
[INFO] [stderr]    |
[INFO] [stderr] 90 |             println!("");
[INFO] [stderr]    |             ^^^^^^^^^^^^ help: replace it with: `println!()`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::println_empty_string)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#println_empty_string
[INFO] [stderr] 
[INFO] [stderr] warning: manual implementation of an assign operation
[INFO] [stderr]   --> src/maze/mod.rs:16:5
[INFO] [stderr]    |
[INFO] [stderr] 16 |     *pass = *pass | d as usize;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `*pass |= d as usize`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::assign_op_pattern)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#assign_op_pattern
[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/maze/mod.rs:30:49
[INFO] [stderr]    |
[INFO] [stderr] 30 |     pub fn new(rows: usize, cols: usize, edges: &Vec<Edge>) -> Self {
[INFO] [stderr]    |                                                 ^^^^^^^^^^ help: change this to: `&[Edge]`
[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: the loop variable `i` is only used to index `map`.
[INFO] [stderr]   --> src/maze/mod.rs:48:18
[INFO] [stderr]    |
[INFO] [stderr] 48 |         for i in 0..rows * 2 + 1 {
[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] 48 |         for <item> in map.iter_mut().take(rows * 2 + 1) {
[INFO] [stderr]    |             ^^^^^^    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: an inclusive range would be more readable
[INFO] [stderr]   --> src/maze/mod.rs:48:18
[INFO] [stderr]    |
[INFO] [stderr] 48 |         for i in 0..rows * 2 + 1 {
[INFO] [stderr]    |                  ^^^^^^^^^^^^^^^ help: use: `0..=rows * 2`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::range_plus_one)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#range_plus_one
[INFO] [stderr] 
[INFO] [stderr] warning: an inclusive range would be more readable
[INFO] [stderr]   --> src/maze/mod.rs:82:18
[INFO] [stderr]    |
[INFO] [stderr] 82 |         for r in 0..self.rows * 2 + 1 {
[INFO] [stderr]    |                  ^^^^^^^^^^^^^^^^^^^^ help: use: `0..=self.rows * 2`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#range_plus_one
[INFO] [stderr] 
[INFO] [stderr] warning: an inclusive range would be more readable
[INFO] [stderr]   --> src/maze/mod.rs:83:22
[INFO] [stderr]    |
[INFO] [stderr] 83 |             for c in 0..self.cols * 2 + 1 {
[INFO] [stderr]    |                      ^^^^^^^^^^^^^^^^^^^^ help: use: `0..=self.cols * 2`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#range_plus_one
[INFO] [stderr] 
[INFO] [stderr] warning: manual implementation of an assign operation
[INFO] [stderr]   --> src/maze/mod.rs:16:5
[INFO] [stderr]    |
[INFO] [stderr] 16 |     *pass = *pass | d as usize;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `*pass |= d as usize`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::assign_op_pattern)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#assign_op_pattern
[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/maze/mod.rs:30:49
[INFO] [stderr]    |
[INFO] [stderr] 30 |     pub fn new(rows: usize, cols: usize, edges: &Vec<Edge>) -> Self {
[INFO] [stderr]    |                                                 ^^^^^^^^^^ help: change this to: `&[Edge]`
[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: the loop variable `i` is only used to index `map`.
[INFO] [stderr]   --> src/maze/mod.rs:48:18
[INFO] [stderr]    |
[INFO] [stderr] 48 |         for i in 0..rows * 2 + 1 {
[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] 48 |         for <item> in map.iter_mut().take(rows * 2 + 1) {
[INFO] [stderr]    |             ^^^^^^    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: an inclusive range would be more readable
[INFO] [stderr]   --> src/maze/mod.rs:48:18
[INFO] [stderr]    |
[INFO] [stderr] 48 |         for i in 0..rows * 2 + 1 {
[INFO] [stderr]    |                  ^^^^^^^^^^^^^^^ help: use: `0..=rows * 2`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::range_plus_one)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#range_plus_one
[INFO] [stderr] 
[INFO] [stderr] warning: an inclusive range would be more readable
[INFO] [stderr]   --> src/maze/mod.rs:82:18
[INFO] [stderr]    |
[INFO] [stderr] 82 |         for r in 0..self.rows * 2 + 1 {
[INFO] [stderr]    |                  ^^^^^^^^^^^^^^^^^^^^ help: use: `0..=self.rows * 2`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#range_plus_one
[INFO] [stderr] 
[INFO] [stderr] warning: an inclusive range would be more readable
[INFO] [stderr]   --> src/maze/mod.rs:83:22
[INFO] [stderr]    |
[INFO] [stderr] 83 |             for c in 0..self.cols * 2 + 1 {
[INFO] [stderr]    |                      ^^^^^^^^^^^^^^^^^^^^ help: use: `0..=self.cols * 2`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#range_plus_one
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.74s
[INFO] running `"docker" "inspect" "7ca164b9858828cbabfe244abb680134f8e599e434ecaaea484b4fa78c4c308e"`
[INFO] running `"docker" "rm" "-f" "7ca164b9858828cbabfe244abb680134f8e599e434ecaaea484b4fa78c4c308e"`
[INFO] [stdout] 7ca164b9858828cbabfe244abb680134f8e599e434ecaaea484b4fa78c4c308e