[INFO] updating cached repository jonirrings/conway_s_game_of_life
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/jonirrings/conway_s_game_of_life
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/jonirrings/conway_s_game_of_life" "work/ex/clippy-test-run/sources/stable/gh/jonirrings/conway_s_game_of_life"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable/gh/jonirrings/conway_s_game_of_life'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/jonirrings/conway_s_game_of_life" "work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/jonirrings/conway_s_game_of_life"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/jonirrings/conway_s_game_of_life'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] c04a51342c5c93a9b4bbb8c53ba286d0cb47f9a8
[INFO] sha for GitHub repo jonirrings/conway_s_game_of_life: c04a51342c5c93a9b4bbb8c53ba286d0cb47f9a8
[INFO] validating manifest of jonirrings/conway_s_game_of_life 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 jonirrings/conway_s_game_of_life 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 jonirrings/conway_s_game_of_life
[INFO] finished frobbing jonirrings/conway_s_game_of_life
[INFO] frobbed toml for jonirrings/conway_s_game_of_life written to work/ex/clippy-test-run/sources/stable/gh/jonirrings/conway_s_game_of_life/Cargo.toml
[INFO] started frobbing jonirrings/conway_s_game_of_life
[INFO] finished frobbing jonirrings/conway_s_game_of_life
[INFO] frobbed toml for jonirrings/conway_s_game_of_life written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/jonirrings/conway_s_game_of_life/Cargo.toml
[INFO] crate jonirrings/conway_s_game_of_life 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 jonirrings/conway_s_game_of_life against stable for clippy-test-run
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/clippy-test-run/worker-1/stable:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/clippy-test-run/sources/stable/gh/jonirrings/conway_s_game_of_life:/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] 96acacbcf8df472a356607819686b5065e753f15bb2b40260f8930a0e6468681
[INFO] running `"docker" "start" "-a" "96acacbcf8df472a356607819686b5065e753f15bb2b40260f8930a0e6468681"`
[INFO] [stderr] warning: `panic` setting is ignored for `test` profile
[INFO] [stderr] warning: `panic` setting is ignored for `bench` profile
[INFO] [stderr]    Compiling num-traits v0.2.4
[INFO] [stderr]     Checking void v1.0.2
[INFO] [stderr]     Checking libc v0.2.42
[INFO] [stderr]    Compiling matrixmultiply v0.1.14
[INFO] [stderr]     Checking ucd-util v0.1.1
[INFO] [stderr]     Checking either v1.5.0
[INFO] [stderr]     Checking rawpointer v0.1.0
[INFO] [stderr]    Compiling ndarray v0.11.2
[INFO] [stderr]    Compiling regex v1.0.0
[INFO] [stderr]     Checking lazy_static v1.0.1
[INFO] [stderr]     Checking utf8-ranges v1.0.0
[INFO] [stderr]     Checking unreachable v1.0.0
[INFO] [stderr]     Checking itertools v0.7.8
[INFO] [stderr]     Checking regex-syntax v0.6.0
[INFO] [stderr]     Checking thread_local v0.3.5
[INFO] [stderr]     Checking memchr v2.0.1
[INFO] [stderr]     Checking aho-corasick v0.6.4
[INFO] [stderr]     Checking num-complex v0.1.43
[INFO] [stderr]     Checking num-traits v0.1.43
[INFO] [stderr]     Checking conway_s_game_of_life v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: immediately dereferencing a reference
[INFO] [stderr]   --> src/board.rs:28:33
[INFO] [stderr]    |
[INFO] [stderr] 28 |         expanded_grid.slice_mut(s![1..-1,1..-1]).assign(&grid);
[INFO] [stderr]    |                                 ^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::deref_addrof)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#deref_addrof
[INFO] [stderr]    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: immediately dereferencing a reference
[INFO] [stderr]   --> src/board.rs:37:51
[INFO] [stderr]    |
[INFO] [stderr] 37 |             neighbor_view += &expanded_grid.slice(s![0..-2, 0..-2]); // north west
[INFO] [stderr]    |                                                   ^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#deref_addrof
[INFO] [stderr]    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: immediately dereferencing a reference
[INFO] [stderr]   --> src/board.rs:38:51
[INFO] [stderr]    |
[INFO] [stderr] 38 |             neighbor_view += &expanded_grid.slice(s![0..-2, 1..-1]); // west
[INFO] [stderr]    |                                                   ^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#deref_addrof
[INFO] [stderr]    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: immediately dereferencing a reference
[INFO] [stderr]   --> src/board.rs:39:51
[INFO] [stderr]    |
[INFO] [stderr] 39 |             neighbor_view += &expanded_grid.slice(s![0..-2, 2..  ]); // south west
[INFO] [stderr]    |                                                   ^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#deref_addrof
[INFO] [stderr]    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: immediately dereferencing a reference
[INFO] [stderr]   --> src/board.rs:41:51
[INFO] [stderr]    |
[INFO] [stderr] 41 |             neighbor_view += &expanded_grid.slice(s![1..-1, 0..-2]); // north
[INFO] [stderr]    |                                                   ^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#deref_addrof
[INFO] [stderr]    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: immediately dereferencing a reference
[INFO] [stderr]   --> src/board.rs:42:51
[INFO] [stderr]    |
[INFO] [stderr] 42 |             neighbor_view += &expanded_grid.slice(s![1..-1, 2..  ]); // south
[INFO] [stderr]    |                                                   ^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#deref_addrof
[INFO] [stderr]    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: immediately dereferencing a reference
[INFO] [stderr]   --> src/board.rs:44:51
[INFO] [stderr]    |
[INFO] [stderr] 44 |             neighbor_view += &expanded_grid.slice(s![2.., 0..-2]); // north east
[INFO] [stderr]    |                                                   ^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#deref_addrof
[INFO] [stderr]    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: immediately dereferencing a reference
[INFO] [stderr]   --> src/board.rs:45:51
[INFO] [stderr]    |
[INFO] [stderr] 45 |             neighbor_view += &expanded_grid.slice(s![2.., 1..-1]); // east
[INFO] [stderr]    |                                                   ^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#deref_addrof
[INFO] [stderr]    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: immediately dereferencing a reference
[INFO] [stderr]   --> src/board.rs:46:51
[INFO] [stderr]    |
[INFO] [stderr] 46 |             neighbor_view += &expanded_grid.slice(s![2.., 2..  ]); // south east
[INFO] [stderr]    |                                                   ^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#deref_addrof
[INFO] [stderr]    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: writing `&String` instead of `&str` involves a new object where a slice will do.
[INFO] [stderr]  --> src/config_loader.rs:9:26
[INFO] [stderr]   |
[INFO] [stderr] 9 | pub fn load_config(path: &String) -> Option<Board> {
[INFO] [stderr]   |                          ^^^^^^^ help: change this to: `&str`
[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: called `map(f)` on an Option value where `f` is a unit closure
[INFO] [stderr]   --> src/config_loader.rs:31:25
[INFO] [stderr]    |
[INFO] [stderr] 31 |                            caps.get(1).map(|mat| {
[INFO] [stderr]    |   _________________________^
[INFO] [stderr]    |  |_________________________|
[INFO] [stderr]    | ||
[INFO] [stderr] 32 | ||                             gen = usize::from_str(mat.as_str()).unwrap_or(0);
[INFO] [stderr] 33 | ||                         });
[INFO] [stderr]    | ||__________________________^- help: try this: `if let Some(mat) = caps.get(1) { gen = usize::from_str(mat.as_str()).unwrap_or(0); }`
[INFO] [stderr]    | |___________________________|
[INFO] [stderr]    | 
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::option_map_unit_fn)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#option_map_unit_fn
[INFO] [stderr] 
[INFO] [stderr] warning: called `map(f)` on an Option value where `f` is a unit closure
[INFO] [stderr]   --> src/config_loader.rs:43:25
[INFO] [stderr]    |
[INFO] [stderr] 43 |                            caps.get(1).map(|mat| {
[INFO] [stderr]    |   _________________________^
[INFO] [stderr]    |  |_________________________|
[INFO] [stderr]    | ||
[INFO] [stderr] 44 | ||                             rows = usize::from_str(mat.as_str()).unwrap_or(0);
[INFO] [stderr] 45 | ||                         });
[INFO] [stderr]    | ||__________________________^- help: try this: `if let Some(mat) = caps.get(1) { rows = usize::from_str(mat.as_str()).unwrap_or(0); }`
[INFO] [stderr]    | |___________________________|
[INFO] [stderr]    | 
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#option_map_unit_fn
[INFO] [stderr] 
[INFO] [stderr] warning: called `map(f)` on an Option value where `f` is a unit closure
[INFO] [stderr]   --> src/config_loader.rs:46:25
[INFO] [stderr]    |
[INFO] [stderr] 46 |                            caps.get(2).map(|mat| {
[INFO] [stderr]    |   _________________________^
[INFO] [stderr]    |  |_________________________|
[INFO] [stderr]    | ||
[INFO] [stderr] 47 | ||                             cols = usize::from_str(mat.as_str()).unwrap_or(0);
[INFO] [stderr] 48 | ||                         });
[INFO] [stderr]    | ||__________________________^- help: try this: `if let Some(mat) = caps.get(2) { cols = usize::from_str(mat.as_str()).unwrap_or(0); }`
[INFO] [stderr]    | |___________________________|
[INFO] [stderr]    | 
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#option_map_unit_fn
[INFO] [stderr] 
[INFO] [stderr] warning: length comparison to zero
[INFO] [stderr]   --> src/config_loader.rs:65:46
[INFO] [stderr]    |
[INFO] [stderr] 65 |     if rows == 0 || cols == 0 || gen == 0 || cells.len() == 0 {
[INFO] [stderr]    |                                              ^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `cells.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: `ref` on an entire `let` pattern is discouraged, take a reference with `&` instead
[INFO] [stderr]   --> src/board.rs:25:13
[INFO] [stderr]    |
[INFO] [stderr] 25 |         let ref grid = self.grid;
[INFO] [stderr]    |         ----^^^^^^^^------------- help: try: `let grid = &self.grid;`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::toplevel_ref_arg)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#toplevel_ref_arg
[INFO] [stderr] 
[INFO] [stderr] warning: `ref` on an entire `let` pattern is discouraged, take a reference with `&` instead
[INFO] [stderr]   --> src/board.rs:67:13
[INFO] [stderr]    |
[INFO] [stderr] 67 |         let ref grid = self.grid;
[INFO] [stderr]    |         ----^^^^^^^^------------- help: try: `let grid = &self.grid;`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#toplevel_ref_arg
[INFO] [stderr] 
[INFO] [stderr] warning: immediately dereferencing a reference
[INFO] [stderr]   --> src/board.rs:28:33
[INFO] [stderr]    |
[INFO] [stderr] 28 |         expanded_grid.slice_mut(s![1..-1,1..-1]).assign(&grid);
[INFO] [stderr]    |                                 ^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::deref_addrof)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#deref_addrof
[INFO] [stderr]    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: immediately dereferencing a reference
[INFO] [stderr]   --> src/board.rs:37:51
[INFO] [stderr]    |
[INFO] [stderr] 37 |             neighbor_view += &expanded_grid.slice(s![0..-2, 0..-2]); // north west
[INFO] [stderr]    |                                                   ^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#deref_addrof
[INFO] [stderr]    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: immediately dereferencing a reference
[INFO] [stderr]   --> src/board.rs:38:51
[INFO] [stderr]    |
[INFO] [stderr] 38 |             neighbor_view += &expanded_grid.slice(s![0..-2, 1..-1]); // west
[INFO] [stderr]    |                                                   ^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#deref_addrof
[INFO] [stderr]    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: immediately dereferencing a reference
[INFO] [stderr]   --> src/board.rs:39:51
[INFO] [stderr]    |
[INFO] [stderr] 39 |             neighbor_view += &expanded_grid.slice(s![0..-2, 2..  ]); // south west
[INFO] [stderr]    |                                                   ^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#deref_addrof
[INFO] [stderr]    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: immediately dereferencing a reference
[INFO] [stderr]   --> src/board.rs:41:51
[INFO] [stderr]    |
[INFO] [stderr] 41 |             neighbor_view += &expanded_grid.slice(s![1..-1, 0..-2]); // north
[INFO] [stderr]    |                                                   ^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#deref_addrof
[INFO] [stderr]    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: immediately dereferencing a reference
[INFO] [stderr]   --> src/board.rs:42:51
[INFO] [stderr]    |
[INFO] [stderr] 42 |             neighbor_view += &expanded_grid.slice(s![1..-1, 2..  ]); // south
[INFO] [stderr]    |                                                   ^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#deref_addrof
[INFO] [stderr]    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: immediately dereferencing a reference
[INFO] [stderr]   --> src/board.rs:44:51
[INFO] [stderr]    |
[INFO] [stderr] 44 |             neighbor_view += &expanded_grid.slice(s![2.., 0..-2]); // north east
[INFO] [stderr]    |                                                   ^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#deref_addrof
[INFO] [stderr]    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: immediately dereferencing a reference
[INFO] [stderr]   --> src/board.rs:45:51
[INFO] [stderr]    |
[INFO] [stderr] 45 |             neighbor_view += &expanded_grid.slice(s![2.., 1..-1]); // east
[INFO] [stderr]    |                                                   ^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#deref_addrof
[INFO] [stderr]    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: immediately dereferencing a reference
[INFO] [stderr]   --> src/board.rs:46:51
[INFO] [stderr]    |
[INFO] [stderr] 46 |             neighbor_view += &expanded_grid.slice(s![2.., 2..  ]); // south east
[INFO] [stderr]    |                                                   ^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#deref_addrof
[INFO] [stderr]    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: writing `&String` instead of `&str` involves a new object where a slice will do.
[INFO] [stderr]  --> src/config_loader.rs:9:26
[INFO] [stderr]   |
[INFO] [stderr] 9 | pub fn load_config(path: &String) -> Option<Board> {
[INFO] [stderr]   |                          ^^^^^^^ help: change this to: `&str`
[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: called `map(f)` on an Option value where `f` is a unit closure
[INFO] [stderr]   --> src/config_loader.rs:31:25
[INFO] [stderr]    |
[INFO] [stderr] 31 |                            caps.get(1).map(|mat| {
[INFO] [stderr]    |   _________________________^
[INFO] [stderr]    |  |_________________________|
[INFO] [stderr]    | ||
[INFO] [stderr] 32 | ||                             gen = usize::from_str(mat.as_str()).unwrap_or(0);
[INFO] [stderr] 33 | ||                         });
[INFO] [stderr]    | ||__________________________^- help: try this: `if let Some(mat) = caps.get(1) { gen = usize::from_str(mat.as_str()).unwrap_or(0); }`
[INFO] [stderr]    | |___________________________|
[INFO] [stderr]    | 
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::option_map_unit_fn)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#option_map_unit_fn
[INFO] [stderr] 
[INFO] [stderr] warning: called `map(f)` on an Option value where `f` is a unit closure
[INFO] [stderr]   --> src/config_loader.rs:43:25
[INFO] [stderr]    |
[INFO] [stderr] 43 |                            caps.get(1).map(|mat| {
[INFO] [stderr]    |   _________________________^
[INFO] [stderr]    |  |_________________________|
[INFO] [stderr]    | ||
[INFO] [stderr] 44 | ||                             rows = usize::from_str(mat.as_str()).unwrap_or(0);
[INFO] [stderr] 45 | ||                         });
[INFO] [stderr]    | ||__________________________^- help: try this: `if let Some(mat) = caps.get(1) { rows = usize::from_str(mat.as_str()).unwrap_or(0); }`
[INFO] [stderr]    | |___________________________|
[INFO] [stderr]    | 
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#option_map_unit_fn
[INFO] [stderr] 
[INFO] [stderr] warning: called `map(f)` on an Option value where `f` is a unit closure
[INFO] [stderr]   --> src/config_loader.rs:46:25
[INFO] [stderr]    |
[INFO] [stderr] 46 |                            caps.get(2).map(|mat| {
[INFO] [stderr]    |   _________________________^
[INFO] [stderr]    |  |_________________________|
[INFO] [stderr]    | ||
[INFO] [stderr] 47 | ||                             cols = usize::from_str(mat.as_str()).unwrap_or(0);
[INFO] [stderr] 48 | ||                         });
[INFO] [stderr]    | ||__________________________^- help: try this: `if let Some(mat) = caps.get(2) { cols = usize::from_str(mat.as_str()).unwrap_or(0); }`
[INFO] [stderr]    | |___________________________|
[INFO] [stderr]    | 
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#option_map_unit_fn
[INFO] [stderr] 
[INFO] [stderr] warning: length comparison to zero
[INFO] [stderr]   --> src/config_loader.rs:65:46
[INFO] [stderr]    |
[INFO] [stderr] 65 |     if rows == 0 || cols == 0 || gen == 0 || cells.len() == 0 {
[INFO] [stderr]    |                                              ^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `cells.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: `ref` on an entire `let` pattern is discouraged, take a reference with `&` instead
[INFO] [stderr]   --> src/board.rs:25:13
[INFO] [stderr]    |
[INFO] [stderr] 25 |         let ref grid = self.grid;
[INFO] [stderr]    |         ----^^^^^^^^------------- help: try: `let grid = &self.grid;`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::toplevel_ref_arg)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#toplevel_ref_arg
[INFO] [stderr] 
[INFO] [stderr] warning: `ref` on an entire `let` pattern is discouraged, take a reference with `&` instead
[INFO] [stderr]   --> src/board.rs:67:13
[INFO] [stderr]    |
[INFO] [stderr] 67 |         let ref grid = self.grid;
[INFO] [stderr]    |         ----^^^^^^^^------------- help: try: `let grid = &self.grid;`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#toplevel_ref_arg
[INFO] [stderr] 
[INFO] [stderr] warning: immediately dereferencing a reference
[INFO] [stderr]   --> src/board.rs:28:33
[INFO] [stderr]    |
[INFO] [stderr] 28 |         expanded_grid.slice_mut(s![1..-1,1..-1]).assign(&grid);
[INFO] [stderr]    |                                 ^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::deref_addrof)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#deref_addrof
[INFO] [stderr]    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: immediately dereferencing a reference
[INFO] [stderr]   --> src/board.rs:37:51
[INFO] [stderr]    |
[INFO] [stderr] 37 |             neighbor_view += &expanded_grid.slice(s![0..-2, 0..-2]); // north west
[INFO] [stderr]    |                                                   ^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#deref_addrof
[INFO] [stderr]    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: immediately dereferencing a reference
[INFO] [stderr]   --> src/board.rs:38:51
[INFO] [stderr]    |
[INFO] [stderr] 38 |             neighbor_view += &expanded_grid.slice(s![0..-2, 1..-1]); // west
[INFO] [stderr]    |                                                   ^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#deref_addrof
[INFO] [stderr]    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: immediately dereferencing a reference
[INFO] [stderr]   --> src/board.rs:39:51
[INFO] [stderr]    |
[INFO] [stderr] 39 |             neighbor_view += &expanded_grid.slice(s![0..-2, 2..  ]); // south west
[INFO] [stderr]    |                                                   ^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#deref_addrof
[INFO] [stderr]    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: immediately dereferencing a reference
[INFO] [stderr]   --> src/board.rs:41:51
[INFO] [stderr]    |
[INFO] [stderr] 41 |             neighbor_view += &expanded_grid.slice(s![1..-1, 0..-2]); // north
[INFO] [stderr]    |                                                   ^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#deref_addrof
[INFO] [stderr]    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: immediately dereferencing a reference
[INFO] [stderr]   --> src/board.rs:42:51
[INFO] [stderr]    |
[INFO] [stderr] 42 |             neighbor_view += &expanded_grid.slice(s![1..-1, 2..  ]); // south
[INFO] [stderr]    |                                                   ^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#deref_addrof
[INFO] [stderr]    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: immediately dereferencing a reference
[INFO] [stderr]   --> src/board.rs:44:51
[INFO] [stderr]    |
[INFO] [stderr] 44 |             neighbor_view += &expanded_grid.slice(s![2.., 0..-2]); // north east
[INFO] [stderr]    |                                                   ^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#deref_addrof
[INFO] [stderr]    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: immediately dereferencing a reference
[INFO] [stderr]   --> src/board.rs:45:51
[INFO] [stderr]    |
[INFO] [stderr] 45 |             neighbor_view += &expanded_grid.slice(s![2.., 1..-1]); // east
[INFO] [stderr]    |                                                   ^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#deref_addrof
[INFO] [stderr]    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: immediately dereferencing a reference
[INFO] [stderr]   --> src/board.rs:46:51
[INFO] [stderr]    |
[INFO] [stderr] 46 |             neighbor_view += &expanded_grid.slice(s![2.., 2..  ]); // south east
[INFO] [stderr]    |                                                   ^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#deref_addrof
[INFO] [stderr]    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: writing `&String` instead of `&str` involves a new object where a slice will do.
[INFO] [stderr]  --> src/config_loader.rs:9:26
[INFO] [stderr]   |
[INFO] [stderr] 9 | pub fn load_config(path: &String) -> Option<Board> {
[INFO] [stderr]   |                          ^^^^^^^ help: change this to: `&str`
[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: called `map(f)` on an Option value where `f` is a unit closure
[INFO] [stderr]   --> src/config_loader.rs:31:25
[INFO] [stderr]    |
[INFO] [stderr] 31 |                            caps.get(1).map(|mat| {
[INFO] [stderr]    |   _________________________^
[INFO] [stderr]    |  |_________________________|
[INFO] [stderr]    | ||
[INFO] [stderr] 32 | ||                             gen = usize::from_str(mat.as_str()).unwrap_or(0);
[INFO] [stderr] 33 | ||                         });
[INFO] [stderr]    | ||__________________________^- help: try this: `if let Some(mat) = caps.get(1) { gen = usize::from_str(mat.as_str()).unwrap_or(0); }`
[INFO] [stderr]    | |___________________________|
[INFO] [stderr]    | 
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::option_map_unit_fn)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#option_map_unit_fn
[INFO] [stderr] 
[INFO] [stderr] warning: called `map(f)` on an Option value where `f` is a unit closure
[INFO] [stderr]   --> src/config_loader.rs:43:25
[INFO] [stderr]    |
[INFO] [stderr] 43 |                            caps.get(1).map(|mat| {
[INFO] [stderr]    |   _________________________^
[INFO] [stderr]    |  |_________________________|
[INFO] [stderr]    | ||
[INFO] [stderr] 44 | ||                             rows = usize::from_str(mat.as_str()).unwrap_or(0);
[INFO] [stderr] 45 | ||                         });
[INFO] [stderr]    | ||__________________________^- help: try this: `if let Some(mat) = caps.get(1) { rows = usize::from_str(mat.as_str()).unwrap_or(0); }`
[INFO] [stderr]    | |___________________________|
[INFO] [stderr]    | 
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#option_map_unit_fn
[INFO] [stderr] 
[INFO] [stderr] warning: called `map(f)` on an Option value where `f` is a unit closure
[INFO] [stderr]   --> src/config_loader.rs:46:25
[INFO] [stderr]    |
[INFO] [stderr] 46 |                            caps.get(2).map(|mat| {
[INFO] [stderr]    |   _________________________^
[INFO] [stderr]    |  |_________________________|
[INFO] [stderr]    | ||
[INFO] [stderr] 47 | ||                             cols = usize::from_str(mat.as_str()).unwrap_or(0);
[INFO] [stderr] 48 | ||                         });
[INFO] [stderr]    | ||__________________________^- help: try this: `if let Some(mat) = caps.get(2) { cols = usize::from_str(mat.as_str()).unwrap_or(0); }`
[INFO] [stderr]    | |___________________________|
[INFO] [stderr]    | 
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#option_map_unit_fn
[INFO] [stderr] 
[INFO] [stderr] warning: length comparison to zero
[INFO] [stderr]   --> src/config_loader.rs:65:46
[INFO] [stderr]    |
[INFO] [stderr] 65 |     if rows == 0 || cols == 0 || gen == 0 || cells.len() == 0 {
[INFO] [stderr]    |                                              ^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `cells.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: `ref` on an entire `let` pattern is discouraged, take a reference with `&` instead
[INFO] [stderr]   --> src/board.rs:25:13
[INFO] [stderr]    |
[INFO] [stderr] 25 |         let ref grid = self.grid;
[INFO] [stderr]    |         ----^^^^^^^^------------- help: try: `let grid = &self.grid;`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::toplevel_ref_arg)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#toplevel_ref_arg
[INFO] [stderr] 
[INFO] [stderr] warning: `ref` on an entire `let` pattern is discouraged, take a reference with `&` instead
[INFO] [stderr]   --> src/board.rs:67:13
[INFO] [stderr]    |
[INFO] [stderr] 67 |         let ref grid = self.grid;
[INFO] [stderr]    |         ----^^^^^^^^------------- help: try: `let grid = &self.grid;`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#toplevel_ref_arg
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 46.46s
[INFO] running `"docker" "inspect" "96acacbcf8df472a356607819686b5065e753f15bb2b40260f8930a0e6468681"`
[INFO] running `"docker" "rm" "-f" "96acacbcf8df472a356607819686b5065e753f15bb2b40260f8930a0e6468681"`
[INFO] [stdout] 96acacbcf8df472a356607819686b5065e753f15bb2b40260f8930a0e6468681