[INFO] updating cached repository seven1m/boardslam-rust
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/seven1m/boardslam-rust
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/seven1m/boardslam-rust" "work/ex/clippy-test-run/sources/stable/gh/seven1m/boardslam-rust"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable/gh/seven1m/boardslam-rust'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/seven1m/boardslam-rust" "work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/seven1m/boardslam-rust"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/seven1m/boardslam-rust'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 07719975bf320a344de8d616d4f1ce3d0ab8f267
[INFO] sha for GitHub repo seven1m/boardslam-rust: 07719975bf320a344de8d616d4f1ce3d0ab8f267
[INFO] validating manifest of seven1m/boardslam-rust 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 seven1m/boardslam-rust 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 seven1m/boardslam-rust
[INFO] finished frobbing seven1m/boardslam-rust
[INFO] frobbed toml for seven1m/boardslam-rust written to work/ex/clippy-test-run/sources/stable/gh/seven1m/boardslam-rust/Cargo.toml
[INFO] started frobbing seven1m/boardslam-rust
[INFO] finished frobbing seven1m/boardslam-rust
[INFO] frobbed toml for seven1m/boardslam-rust written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/seven1m/boardslam-rust/Cargo.toml
[INFO] crate seven1m/boardslam-rust 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 seven1m/boardslam-rust 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/seven1m/boardslam-rust:/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] 53c399cf2421f23774bf83977b4f30fa60aa34cbaf6a4ba584e84822b9de64b8
[INFO] running `"docker" "start" "-a" "53c399cf2421f23774bf83977b4f30fa60aa34cbaf6a4ba584e84822b9de64b8"`
[INFO] [stderr]     Checking boardslam v1.0.0 (/opt/crater/workdir)
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]   --> src/lib.rs:15:17
[INFO] [stderr]    |
[INFO] [stderr] 15 |           let s = match self {
[INFO] [stderr]    |  _________________^
[INFO] [stderr] 16 | |             &Op::Add => "+",
[INFO] [stderr] 17 | |             &Op::Subtract => "-",
[INFO] [stderr] 18 | |             &Op::Multipy => "*",
[INFO] [stderr] 19 | |             &Op::Divide => "/",
[INFO] [stderr] 20 | |         };
[INFO] [stderr]    | |_________^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::match_ref_pats)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_ref_pats
[INFO] [stderr] help: instead of prefixing all patterns with `&`, you can dereference the expression
[INFO] [stderr]    |
[INFO] [stderr] 15 |         let s = match *self {
[INFO] [stderr] 16 |             Op::Add => "+",
[INFO] [stderr] 17 |             Op::Subtract => "-",
[INFO] [stderr] 18 |             Op::Multipy => "*",
[INFO] [stderr] 19 |             Op::Divide => "/",
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: this function has too many arguments (8/7)
[INFO] [stderr]   --> src/lib.rs:49:5
[INFO] [stderr]    |
[INFO] [stderr] 49 | /     pub fn from(
[INFO] [stderr] 50 | |         x: &u8,
[INFO] [stderr] 51 | |         x_power: &u32,
[INFO] [stderr] 52 | |         op1: &Op,
[INFO] [stderr] ...  |
[INFO] [stderr] 74 | |         }
[INFO] [stderr] 75 | |     }
[INFO] [stderr]    | |_____^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::too_many_arguments)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#too_many_arguments
[INFO] [stderr] 
[INFO] [stderr] warning: this argument is passed by reference, but would be more efficient if passed by value
[INFO] [stderr]   --> src/lib.rs:50:12
[INFO] [stderr]    |
[INFO] [stderr] 50 |         x: &u8,
[INFO] [stderr]    |            ^^^ help: consider passing by value instead: `u8`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::trivially_copy_pass_by_ref)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#trivially_copy_pass_by_ref
[INFO] [stderr] 
[INFO] [stderr] warning: this argument is passed by reference, but would be more efficient if passed by value
[INFO] [stderr]   --> src/lib.rs:51:18
[INFO] [stderr]    |
[INFO] [stderr] 51 |         x_power: &u32,
[INFO] [stderr]    |                  ^^^^ help: consider passing by value instead: `u32`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#trivially_copy_pass_by_ref
[INFO] [stderr] 
[INFO] [stderr] warning: this argument is passed by reference, but would be more efficient if passed by value
[INFO] [stderr]   --> src/lib.rs:53:12
[INFO] [stderr]    |
[INFO] [stderr] 53 |         y: &u8,
[INFO] [stderr]    |            ^^^ help: consider passing by value instead: `u8`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#trivially_copy_pass_by_ref
[INFO] [stderr] 
[INFO] [stderr] warning: this argument is passed by reference, but would be more efficient if passed by value
[INFO] [stderr]   --> src/lib.rs:54:18
[INFO] [stderr]    |
[INFO] [stderr] 54 |         y_power: &u32,
[INFO] [stderr]    |                  ^^^^ help: consider passing by value instead: `u32`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#trivially_copy_pass_by_ref
[INFO] [stderr] 
[INFO] [stderr] warning: this argument is passed by reference, but would be more efficient if passed by value
[INFO] [stderr]   --> src/lib.rs:56:12
[INFO] [stderr]    |
[INFO] [stderr] 56 |         z: &u8,
[INFO] [stderr]    |            ^^^ help: consider passing by value instead: `u8`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#trivially_copy_pass_by_ref
[INFO] [stderr] 
[INFO] [stderr] warning: this argument is passed by reference, but would be more efficient if passed by value
[INFO] [stderr]   --> src/lib.rs:57:18
[INFO] [stderr]    |
[INFO] [stderr] 57 |         z_power: &u32,
[INFO] [stderr]    |                  ^^^^ help: consider passing by value instead: `u32`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#trivially_copy_pass_by_ref
[INFO] [stderr] 
[INFO] [stderr] warning: using `clone` on a `Copy` type
[INFO] [stderr]   --> src/lib.rs:61:25
[INFO] [stderr]    |
[INFO] [stderr] 61 |                 number: x.clone(),
[INFO] [stderr]    |                         ^^^^^^^^^ help: try dereferencing it: `*x`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::clone_on_copy)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy
[INFO] [stderr] 
[INFO] [stderr] warning: using `clone` on a `Copy` type
[INFO] [stderr]   --> src/lib.rs:62:24
[INFO] [stderr]    |
[INFO] [stderr] 62 |                 power: x_power.clone(),
[INFO] [stderr]    |                        ^^^^^^^^^^^^^^^ help: try dereferencing it: `*x_power`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy
[INFO] [stderr] 
[INFO] [stderr] warning: using `clone` on a `Copy` type
[INFO] [stderr]   --> src/lib.rs:66:25
[INFO] [stderr]    |
[INFO] [stderr] 66 |                 number: y.clone(),
[INFO] [stderr]    |                         ^^^^^^^^^ help: try dereferencing it: `*y`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy
[INFO] [stderr] 
[INFO] [stderr] warning: using `clone` on a `Copy` type
[INFO] [stderr]   --> src/lib.rs:67:24
[INFO] [stderr]    |
[INFO] [stderr] 67 |                 power: y_power.clone(),
[INFO] [stderr]    |                        ^^^^^^^^^^^^^^^ help: try dereferencing it: `*y_power`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy
[INFO] [stderr] 
[INFO] [stderr] warning: using `clone` on a `Copy` type
[INFO] [stderr]   --> src/lib.rs:71:25
[INFO] [stderr]    |
[INFO] [stderr] 71 |                 number: z.clone(),
[INFO] [stderr]    |                         ^^^^^^^^^ help: try dereferencing it: `*z`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy
[INFO] [stderr] 
[INFO] [stderr] warning: using `clone` on a `Copy` type
[INFO] [stderr]   --> src/lib.rs:72:24
[INFO] [stderr]    |
[INFO] [stderr] 72 |                 power: z_power.clone(),
[INFO] [stderr]    |                        ^^^^^^^^^^^^^^^ help: try dereferencing it: `*z_power`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy
[INFO] [stderr] 
[INFO] [stderr] warning: an inclusive range would be more readable
[INFO] [stderr]    --> src/lib.rs:136:52
[INFO] [stderr]     |
[INFO] [stderr] 136 |     let possible: HashSet<u8> = HashSet::from_iter(1..BOARD_SIZE + 1);
[INFO] [stderr]     |                                                    ^^^^^^^^^^^^^^^^^ help: use: `1..=BOARD_SIZE`
[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: you don't need to add `&` to all patterns
[INFO] [stderr]    --> src/lib.rs:143:5
[INFO] [stderr]     |
[INFO] [stderr] 143 | /     match op {
[INFO] [stderr] 144 | |         &Op::Add => n1.saturating_add(n2),
[INFO] [stderr] 145 | |         &Op::Subtract => n1.saturating_sub(n2),
[INFO] [stderr] 146 | |         &Op::Multipy => n1.saturating_mul(n2),
[INFO] [stderr] ...   |
[INFO] [stderr] 155 | |         }
[INFO] [stderr] 156 | |     }
[INFO] [stderr]     | |_____^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_ref_pats
[INFO] [stderr] help: instead of prefixing all patterns with `&`, you can dereference the expression
[INFO] [stderr]     |
[INFO] [stderr] 143 |     match *op {
[INFO] [stderr] 144 |         Op::Add => n1.saturating_add(n2),
[INFO] [stderr] 145 |         Op::Subtract => n1.saturating_sub(n2),
[INFO] [stderr] 146 |         Op::Multipy => n1.saturating_mul(n2),
[INFO] [stderr] 147 |         Op::Divide => {
[INFO] [stderr]     |
[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/lib.rs:159:26
[INFO] [stderr]     |
[INFO] [stderr] 159 | fn permutations(numbers: &Vec<u8>) -> Vec<(u8, u8, u8)> {
[INFO] [stderr]     |                          ^^^^^^^^
[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] help: change this to
[INFO] [stderr]     |
[INFO] [stderr] 159 | fn permutations(numbers: &[u8]) -> Vec<(u8, u8, u8)> {
[INFO] [stderr]     |                          ^^^^^
[INFO] [stderr] help: change `numbers.clone()` to
[INFO] [stderr]     |
[INFO] [stderr] 162 |         let mut numbers_without_x = numbers.to_owned();
[INFO] [stderr]     |                                     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]   --> src/lib.rs:15:17
[INFO] [stderr]    |
[INFO] [stderr] 15 |           let s = match self {
[INFO] [stderr]    |  _________________^
[INFO] [stderr] 16 | |             &Op::Add => "+",
[INFO] [stderr] 17 | |             &Op::Subtract => "-",
[INFO] [stderr] 18 | |             &Op::Multipy => "*",
[INFO] [stderr] 19 | |             &Op::Divide => "/",
[INFO] [stderr] 20 | |         };
[INFO] [stderr]    | |_________^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::match_ref_pats)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_ref_pats
[INFO] [stderr] help: instead of prefixing all patterns with `&`, you can dereference the expression
[INFO] [stderr]    |
[INFO] [stderr] 15 |         let s = match *self {
[INFO] [stderr] 16 |             Op::Add => "+",
[INFO] [stderr] 17 |             Op::Subtract => "-",
[INFO] [stderr] 18 |             Op::Multipy => "*",
[INFO] [stderr] 19 |             Op::Divide => "/",
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: this function has too many arguments (8/7)
[INFO] [stderr]   --> src/lib.rs:49:5
[INFO] [stderr]    |
[INFO] [stderr] 49 | /     pub fn from(
[INFO] [stderr] 50 | |         x: &u8,
[INFO] [stderr] 51 | |         x_power: &u32,
[INFO] [stderr] 52 | |         op1: &Op,
[INFO] [stderr] ...  |
[INFO] [stderr] 74 | |         }
[INFO] [stderr] 75 | |     }
[INFO] [stderr]    | |_____^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::too_many_arguments)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#too_many_arguments
[INFO] [stderr] 
[INFO] [stderr] warning: this argument is passed by reference, but would be more efficient if passed by value
[INFO] [stderr]   --> src/lib.rs:50:12
[INFO] [stderr]    |
[INFO] [stderr] 50 |         x: &u8,
[INFO] [stderr]    |            ^^^ help: consider passing by value instead: `u8`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::trivially_copy_pass_by_ref)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#trivially_copy_pass_by_ref
[INFO] [stderr] 
[INFO] [stderr] warning: this argument is passed by reference, but would be more efficient if passed by value
[INFO] [stderr]   --> src/lib.rs:51:18
[INFO] [stderr]    |
[INFO] [stderr] 51 |         x_power: &u32,
[INFO] [stderr]    |                  ^^^^ help: consider passing by value instead: `u32`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#trivially_copy_pass_by_ref
[INFO] [stderr] 
[INFO] [stderr] warning: this argument is passed by reference, but would be more efficient if passed by value
[INFO] [stderr]   --> src/lib.rs:53:12
[INFO] [stderr]    |
[INFO] [stderr] 53 |         y: &u8,
[INFO] [stderr]    |            ^^^ help: consider passing by value instead: `u8`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#trivially_copy_pass_by_ref
[INFO] [stderr] 
[INFO] [stderr] warning: this argument is passed by reference, but would be more efficient if passed by value
[INFO] [stderr]   --> src/lib.rs:54:18
[INFO] [stderr]    |
[INFO] [stderr] 54 |         y_power: &u32,
[INFO] [stderr]    |                  ^^^^ help: consider passing by value instead: `u32`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#trivially_copy_pass_by_ref
[INFO] [stderr] 
[INFO] [stderr] warning: this argument is passed by reference, but would be more efficient if passed by value
[INFO] [stderr]   --> src/lib.rs:56:12
[INFO] [stderr]    |
[INFO] [stderr] 56 |         z: &u8,
[INFO] [stderr]    |            ^^^ help: consider passing by value instead: `u8`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#trivially_copy_pass_by_ref
[INFO] [stderr] 
[INFO] [stderr] warning: this argument is passed by reference, but would be more efficient if passed by value
[INFO] [stderr]   --> src/lib.rs:57:18
[INFO] [stderr]    |
[INFO] [stderr] 57 |         z_power: &u32,
[INFO] [stderr]    |                  ^^^^ help: consider passing by value instead: `u32`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#trivially_copy_pass_by_ref
[INFO] [stderr] 
[INFO] [stderr] warning: using `clone` on a `Copy` type
[INFO] [stderr]   --> src/lib.rs:61:25
[INFO] [stderr]    |
[INFO] [stderr] 61 |                 number: x.clone(),
[INFO] [stderr]    |                         ^^^^^^^^^ help: try dereferencing it: `*x`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::clone_on_copy)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy
[INFO] [stderr] 
[INFO] [stderr] warning: using `clone` on a `Copy` type
[INFO] [stderr]   --> src/lib.rs:62:24
[INFO] [stderr]    |
[INFO] [stderr] 62 |                 power: x_power.clone(),
[INFO] [stderr]    |                        ^^^^^^^^^^^^^^^ help: try dereferencing it: `*x_power`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy
[INFO] [stderr] 
[INFO] [stderr] warning: using `clone` on a `Copy` type
[INFO] [stderr]   --> src/lib.rs:66:25
[INFO] [stderr]    |
[INFO] [stderr] 66 |                 number: y.clone(),
[INFO] [stderr]    |                         ^^^^^^^^^ help: try dereferencing it: `*y`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy
[INFO] [stderr] 
[INFO] [stderr] warning: using `clone` on a `Copy` type
[INFO] [stderr]   --> src/lib.rs:67:24
[INFO] [stderr]    |
[INFO] [stderr] 67 |                 power: y_power.clone(),
[INFO] [stderr]    |                        ^^^^^^^^^^^^^^^ help: try dereferencing it: `*y_power`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy
[INFO] [stderr] 
[INFO] [stderr] warning: using `clone` on a `Copy` type
[INFO] [stderr]   --> src/lib.rs:71:25
[INFO] [stderr]    |
[INFO] [stderr] 71 |                 number: z.clone(),
[INFO] [stderr]    |                         ^^^^^^^^^ help: try dereferencing it: `*z`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy
[INFO] [stderr] 
[INFO] [stderr] warning: using `clone` on a `Copy` type
[INFO] [stderr]   --> src/lib.rs:72:24
[INFO] [stderr]    |
[INFO] [stderr] 72 |                 power: z_power.clone(),
[INFO] [stderr]    |                        ^^^^^^^^^^^^^^^ help: try dereferencing it: `*z_power`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy
[INFO] [stderr] 
[INFO] [stderr] warning: an inclusive range would be more readable
[INFO] [stderr]    --> src/lib.rs:136:52
[INFO] [stderr]     |
[INFO] [stderr] 136 |     let possible: HashSet<u8> = HashSet::from_iter(1..BOARD_SIZE + 1);
[INFO] [stderr]     |                                                    ^^^^^^^^^^^^^^^^^ help: use: `1..=BOARD_SIZE`
[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: you don't need to add `&` to all patterns
[INFO] [stderr]    --> src/lib.rs:143:5
[INFO] [stderr]     |
[INFO] [stderr] 143 | /     match op {
[INFO] [stderr] 144 | |         &Op::Add => n1.saturating_add(n2),
[INFO] [stderr] 145 | |         &Op::Subtract => n1.saturating_sub(n2),
[INFO] [stderr] 146 | |         &Op::Multipy => n1.saturating_mul(n2),
[INFO] [stderr] ...   |
[INFO] [stderr] 155 | |         }
[INFO] [stderr] 156 | |     }
[INFO] [stderr]     | |_____^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_ref_pats
[INFO] [stderr] help: instead of prefixing all patterns with `&`, you can dereference the expression
[INFO] [stderr]     |
[INFO] [stderr] 143 |     match *op {
[INFO] [stderr] 144 |         Op::Add => n1.saturating_add(n2),
[INFO] [stderr] 145 |         Op::Subtract => n1.saturating_sub(n2),
[INFO] [stderr] 146 |         Op::Multipy => n1.saturating_mul(n2),
[INFO] [stderr] 147 |         Op::Divide => {
[INFO] [stderr]     |
[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/lib.rs:159:26
[INFO] [stderr]     |
[INFO] [stderr] 159 | fn permutations(numbers: &Vec<u8>) -> Vec<(u8, u8, u8)> {
[INFO] [stderr]     |                          ^^^^^^^^
[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] help: change this to
[INFO] [stderr]     |
[INFO] [stderr] 159 | fn permutations(numbers: &[u8]) -> Vec<(u8, u8, u8)> {
[INFO] [stderr]     |                          ^^^^^
[INFO] [stderr] help: change `numbers.clone()` to
[INFO] [stderr]     |
[INFO] [stderr] 162 |         let mut numbers_without_x = numbers.to_owned();
[INFO] [stderr]     |                                     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: called `.get().unwrap()` on a HashMap. Using `[]` is more clear and more concise
[INFO] [stderr]    --> src/lib.rs:208:22
[INFO] [stderr]     |
[INFO] [stderr] 208 |         let answer = results.get(&22).unwrap();
[INFO] [stderr]     |                      ^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `&results[&22]`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::get_unwrap)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#get_unwrap
[INFO] [stderr] 
[INFO] [stderr] warning: `if _ { .. } else { .. }` is an expression
[INFO] [stderr]   --> src/bin/cgi.rs:56:5
[INFO] [stderr]    |
[INFO] [stderr] 56 | /     let final_html;
[INFO] [stderr] 57 | |     if n1 == 0 || n2 == 0 || n3 == 0 {
[INFO] [stderr] 58 | |         output = "Please specify 3 numbers between 1 and 6".to_string();
[INFO] [stderr] 59 | |         final_html = html.replace("{n1}", "").replace("{n2}", "").replace("{n3}", "").replace("{output}", &output);
[INFO] [stderr] ...  |
[INFO] [stderr] 70 | |         final_html = html.replace("{n1}", &n1.to_string()).replace("{n2}", &n2.to_string()).replace("{n3}", &n3.to_string()).replace("{output}", &output);
[INFO] [stderr] 71 | |     }
[INFO] [stderr]    | |_____^ help: it is more idiomatic to write: `let final_html = if n1 == 0 || n2 == 0 || n3 == 0 { ..; html.replace("{n1}", "").replace("{n2}", "").replace("{n3}", "").replace("{output}", &output) } else { ..; html.replace("{n1}", &n1.to_string()).replace("{n2}", &n2.to_string()).replace("{n3}", &n3.to_string()).replace("{output}", &output) };`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::useless_let_if_seq)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_let_if_seq
[INFO] [stderr] 
[INFO] [stderr] warning: use of `unwrap_or` followed by a function call
[INFO] [stderr]   --> src/bin/cgi.rs:50:42
[INFO] [stderr]    |
[INFO] [stderr] 50 |     let query = env::var("QUERY_STRING").unwrap_or("".to_string());
[INFO] [stderr]    |                                          ^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `unwrap_or_else(|_| "".to_string())`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::or_fun_call)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#or_fun_call
[INFO] [stderr] 
[INFO] [stderr] warning: single-character string constant used as pattern
[INFO] [stderr]   --> src/bin/cgi.rs:77:29
[INFO] [stderr]    |
[INFO] [stderr] 77 |     let pairs = query.split("&");
[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/cgi.rs:79:43
[INFO] [stderr]    |
[INFO] [stderr] 79 |         let parts: Vec<&str> = pair.split("=").collect();
[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: `if _ { .. } else { .. }` is an expression
[INFO] [stderr]   --> src/bin/cgi.rs:56:5
[INFO] [stderr]    |
[INFO] [stderr] 56 | /     let final_html;
[INFO] [stderr] 57 | |     if n1 == 0 || n2 == 0 || n3 == 0 {
[INFO] [stderr] 58 | |         output = "Please specify 3 numbers between 1 and 6".to_string();
[INFO] [stderr] 59 | |         final_html = html.replace("{n1}", "").replace("{n2}", "").replace("{n3}", "").replace("{output}", &output);
[INFO] [stderr] ...  |
[INFO] [stderr] 70 | |         final_html = html.replace("{n1}", &n1.to_string()).replace("{n2}", &n2.to_string()).replace("{n3}", &n3.to_string()).replace("{output}", &output);
[INFO] [stderr] 71 | |     }
[INFO] [stderr]    | |_____^ help: it is more idiomatic to write: `let final_html = if n1 == 0 || n2 == 0 || n3 == 0 { ..; html.replace("{n1}", "").replace("{n2}", "").replace("{n3}", "").replace("{output}", &output) } else { ..; html.replace("{n1}", &n1.to_string()).replace("{n2}", &n2.to_string()).replace("{n3}", &n3.to_string()).replace("{output}", &output) };`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::useless_let_if_seq)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_let_if_seq
[INFO] [stderr] 
[INFO] [stderr] warning: use of `unwrap_or` followed by a function call
[INFO] [stderr]   --> src/bin/cgi.rs:50:42
[INFO] [stderr]    |
[INFO] [stderr] 50 |     let query = env::var("QUERY_STRING").unwrap_or("".to_string());
[INFO] [stderr]    |                                          ^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `unwrap_or_else(|_| "".to_string())`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::or_fun_call)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#or_fun_call
[INFO] [stderr] 
[INFO] [stderr] warning: single-character string constant used as pattern
[INFO] [stderr]   --> src/bin/cgi.rs:77:29
[INFO] [stderr]    |
[INFO] [stderr] 77 |     let pairs = query.split("&");
[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/cgi.rs:79:43
[INFO] [stderr]    |
[INFO] [stderr] 79 |         let parts: Vec<&str> = pair.split("=").collect();
[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 2.28s
[INFO] running `"docker" "inspect" "53c399cf2421f23774bf83977b4f30fa60aa34cbaf6a4ba584e84822b9de64b8"`
[INFO] running `"docker" "rm" "-f" "53c399cf2421f23774bf83977b4f30fa60aa34cbaf6a4ba584e84822b9de64b8"`
[INFO] [stdout] 53c399cf2421f23774bf83977b4f30fa60aa34cbaf6a4ba584e84822b9de64b8