[INFO] cloning repository https://github.com/timmy-feng/flow-solver
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/timmy-feng/flow-solver" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftimmy-feng%2Fflow-solver", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftimmy-feng%2Fflow-solver'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 76c1aad7be2a6dbdf4916fb46d396f3496cd2f18
[INFO] linting timmy-feng/flow-solver against nightly for clippy-nonminimal_bool-denied
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftimmy-feng%2Fflow-solver" "/workspace/builds/worker-7-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/timmy-feng/flow-solver
[INFO] finished tweaking git repo https://github.com/timmy-feng/flow-solver
[INFO] tweaked toml for git repo https://github.com/timmy-feng/flow-solver written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/timmy-feng/flow-solver on toolchain nightly
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+nightly" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/timmy-feng/flow-solver already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+nightly" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded libc v0.2.151
[INFO] [stderr]   Downloaded tokio v1.42.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+nightly" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c51e4dcfd8c0c910f5f874344f73f3fdc8aa1c00dfee34a54442a072b2903c62
[INFO] running `Command { std: "docker" "start" "-a" "c51e4dcfd8c0c910f5f874344f73f3fdc8aa1c00dfee34a54442a072b2903c62", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c51e4dcfd8c0c910f5f874344f73f3fdc8aa1c00dfee34a54442a072b2903c62", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c51e4dcfd8c0c910f5f874344f73f3fdc8aa1c00dfee34a54442a072b2903c62", kill_on_drop: false }`
[INFO] [stdout] c51e4dcfd8c0c910f5f874344f73f3fdc8aa1c00dfee34a54442a072b2903c62
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+nightly" "clippy" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9b7a8c26620fd05125b57b1815484e3cf8419d6f57ca9ef69f3c9f7691fe8771
[INFO] running `Command { std: "docker" "start" "-a" "9b7a8c26620fd05125b57b1815484e3cf8419d6f57ca9ef69f3c9f7691fe8771", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.151
[INFO] [stderr]    Compiling syn v2.0.106
[INFO] [stderr]     Checking tracing-core v0.1.34
[INFO] [stderr]    Compiling serde_json v1.0.143
[INFO] [stderr]     Checking bitflags v2.9.3
[INFO] [stderr]     Checking clap_builder v4.5.44
[INFO] [stderr]     Checking tracing v0.1.41
[INFO] [stderr]     Checking parking_lot_core v0.9.11
[INFO] [stderr]     Checking signal-hook-registry v1.4.6
[INFO] [stderr]     Checking socket2 v0.5.8
[INFO] [stderr]     Checking mio v1.0.2
[INFO] [stderr]     Checking getrandom v0.2.11
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]     Checking parking_lot v0.12.4
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]    Compiling tokio-macros v2.4.0
[INFO] [stderr]    Compiling serde_derive v1.0.219
[INFO] [stderr]    Compiling async-trait v0.1.89
[INFO] [stderr]    Compiling clap_derive v4.5.45
[INFO] [stderr]     Checking tokio v1.42.1
[INFO] [stderr]     Checking axum-core v0.4.5
[INFO] [stderr]     Checking clap v4.5.45
[INFO] [stderr]     Checking serde v1.0.219
[INFO] [stderr]     Checking hyper v1.7.0
[INFO] [stderr]     Checking tokio-util v0.7.16
[INFO] [stderr]     Checking tower v0.5.2
[INFO] [stderr]     Checking tower-http v0.5.2
[INFO] [stderr]     Checking hyper-util v0.1.16
[INFO] [stderr]     Checking serde_path_to_error v0.1.17
[INFO] [stderr]     Checking serde_urlencoded v0.7.1
[INFO] [stderr]     Checking axum v0.7.9
[INFO] [stderr]     Checking flow_solver v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `oth`
[INFO] [stdout]  --> src/gen.rs:7:20
[INFO] [stdout]   |
[INFO] [stdout] 7 |     fn unite(self, oth: Self, u: usize, v: usize) -> Option<Self> { Some(Dummy()) }
[INFO] [stdout]   |                    ^^^ help: if this is intentional, prefix it with an underscore: `_oth`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `u`
[INFO] [stdout]  --> src/gen.rs:7:31
[INFO] [stdout]   |
[INFO] [stdout] 7 |     fn unite(self, oth: Self, u: usize, v: usize) -> Option<Self> { Some(Dummy()) }
[INFO] [stdout]   |                               ^ help: if this is intentional, prefix it with an underscore: `_u`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `v`
[INFO] [stdout]  --> src/gen.rs:7:41
[INFO] [stdout]   |
[INFO] [stdout] 7 |     fn unite(self, oth: Self, u: usize, v: usize) -> Option<Self> { Some(Dummy()) }
[INFO] [stdout]   |                                         ^ help: if this is intentional, prefix it with an underscore: `_v`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `hash_multiplier` is never read
[INFO] [stdout]   --> src/search/mod.rs:33:5
[INFO] [stdout]    |
[INFO] [stdout] 18 | pub struct SearchFlow {
[INFO] [stdout]    |            ---------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 33 |     hash_multiplier: Vec<Modnum>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `SearchFlow` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `get_degree` is never used
[INFO] [stdout]    --> src/search/mod.rs:107:8
[INFO] [stdout]     |
[INFO] [stdout]  38 | impl SearchFlow {
[INFO] [stdout]     | --------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 107 |     fn get_degree(&self, u: usize) -> usize {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/search/modnum.rs:13:9
[INFO] [stdout]    |
[INFO] [stdout] 13 |         return Self(if sum >= HASH_MODULO { sum - HASH_MODULO } else { sum });
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout]    = note: `#[warn(clippy::needless_return)]` on by default
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 13 -         return Self(if sum >= HASH_MODULO { sum - HASH_MODULO } else { sum });
[INFO] [stdout] 13 +         Self(if sum >= HASH_MODULO { sum - HASH_MODULO } else { sum })
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/search/modnum.rs:22:9
[INFO] [stdout]    |
[INFO] [stdout] 22 |         return Self(if diff < 0 { diff + HASH_MODULO } else { diff });
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 22 -         return Self(if diff < 0 { diff + HASH_MODULO } else { diff });
[INFO] [stdout] 22 +         Self(if diff < 0 { diff + HASH_MODULO } else { diff })
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/search/modnum.rs:30:9
[INFO] [stdout]    |
[INFO] [stdout] 30 |         return Self(((self.0 as i64) * (oth.0 as i64) % (HASH_MODULO as i64)) as i32);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 30 -         return Self(((self.0 as i64) * (oth.0 as i64) % (HASH_MODULO as i64)) as i32);
[INFO] [stdout] 30 +         Self(((self.0 as i64) * (oth.0 as i64) % (HASH_MODULO as i64)) as i32)
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/search/mod.rs:83:9
[INFO] [stdout]    |
[INFO] [stdout] 83 | /         return Self {
[INFO] [stdout] 84 | |             h, w, heads, dsu,
[INFO] [stdout] 85 | |             down: vec![false; h * w],
[INFO] [stdout] 86 | |             right: vec![false; h * w],
[INFO] [stdout] ...  |
[INFO] [stdout] 91 | |             config,
[INFO] [stdout] 92 | |         };
[INFO] [stdout]    | |_________^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 83 ~         Self {
[INFO] [stdout] 84 +             h, w, heads, dsu,
[INFO] [stdout] 85 +             down: vec![false; h * w],
[INFO] [stdout] 86 +             right: vec![false; h * w],
[INFO] [stdout] 87 +             search_order,
[INFO] [stdout] 88 +             search_depth: 0,
[INFO] [stdout] 89 +             diagonal_head_count,
[INFO] [stdout] 90 +             hash_multiplier,
[INFO] [stdout] 91 +             config,
[INFO] [stdout] 92 ~         }
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: writing `&Vec` instead of `&[_]` involves a new object where a slice will do
[INFO] [stdout]   --> src/search/mod.rs:39:36
[INFO] [stdout]    |
[INFO] [stdout] 39 |     pub fn from_with_config(board: &Vec<Vec<usize>>, config: SearchConfig) -> Self {
[INFO] [stdout]    |                                    ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#ptr_arg
[INFO] [stdout]    = note: `#[warn(clippy::ptr_arg)]` on by default
[INFO] [stdout] help: change this to
[INFO] [stdout]    |
[INFO] [stdout] 39 -     pub fn from_with_config(board: &Vec<Vec<usize>>, config: SearchConfig) -> Self {
[INFO] [stdout] 39 +     pub fn from_with_config(board: &[Vec<usize>], config: SearchConfig) -> Self {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `SearchFlow` has a public `len` method, but no `is_empty` method
[INFO] [stdout]   --> src/search/mod.rs:97:5
[INFO] [stdout]    |
[INFO] [stdout] 97 |     pub fn len(&self) -> usize { self.h * self.w }
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_without_is_empty
[INFO] [stdout]    = note: `#[warn(clippy::len_without_is_empty)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: manual implementation of `.is_multiple_of()`
[INFO] [stdout]    --> src/search/mod.rs:109:11
[INFO] [stdout]     |
[INFO] [stdout] 109 |         ((u % self.w > 0 && self.right[u - 1]) as usize)
[INFO] [stdout]     |           ^^^^^^^^^^^^^^ help: replace with: `!u.is_multiple_of(self.w)`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#manual_is_multiple_of
[INFO] [stdout]     = note: `#[warn(clippy::manual_is_multiple_of)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this boolean expression can be simplified
[INFO] [stdout]    --> src/search/mod.rs:130:16
[INFO] [stdout]     |
[INFO] [stdout] 130 |               if right && up && self.right[u - self.w] ||
[INFO] [stdout]     |  ________________^
[INFO] [stdout] 131 | |                 right && up && self.down[u - self.w + 1] ||
[INFO] [stdout]     | |________________________________________________________^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#nonminimal_bool
[INFO] [stdout]     = note: `#[warn(clippy::nonminimal_bool)]` on by default
[INFO] [stdout] help: try
[INFO] [stdout]     |
[INFO] [stdout] 130 -             if right && up && self.right[u - self.w] ||
[INFO] [stdout] 131 -                 right && up && self.down[u - self.w + 1] ||
[INFO] [stdout] 130 +             if !(!right || !up || !self.right[u - self.w] && !self.down[u - self.w + 1]) ||
[INFO] [stdout]     |
[INFO] [stdout] 130 -             if right && up && self.right[u - self.w] ||
[INFO] [stdout] 131 -                 right && up && self.down[u - self.w + 1] ||
[INFO] [stdout] 130 +             if (self.down[u - self.w + 1] || self.right[u - self.w]) && up && right ||
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]    --> src/search/mod.rs:170:9
[INFO] [stdout]     |
[INFO] [stdout] 170 |         return true;
[INFO] [stdout]     |         ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]     |
[INFO] [stdout] 170 -         return true;
[INFO] [stdout] 170 +         true
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: manual implementation of `.is_multiple_of()`
[INFO] [stdout]    --> src/search/mod.rs:118:20
[INFO] [stdout]     |
[INFO] [stdout] 118 |         let left = u % self.w > 0 && self.right[u - 1];
[INFO] [stdout]     |                    ^^^^^^^^^^^^^^ help: replace with: `!u.is_multiple_of(self.w)`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#manual_is_multiple_of
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: manual implementation of `.is_multiple_of()`
[INFO] [stdout]    --> src/search/mod.rs:125:21
[INFO] [stdout]     |
[INFO] [stdout] 125 |            right && (u + 1) % self.w == 0 {
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^^^^^^ help: replace with: `(u + 1).is_multiple_of(self.w)`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#manual_is_multiple_of
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this `if` statement can be collapsed
[INFO] [stdout]    --> src/search/mod.rs:137:13
[INFO] [stdout]     |
[INFO] [stdout] 137 | /             if self.config.use_diagonals {
[INFO] [stdout] 138 | |                 if down && left && self.diagonal_head_count[0][u / self.w + u % self.w] == 0 ||
[INFO] [stdout] 139 | |                     down && right && self.diagonal_head_count[1][u / self.w + self.w - u % self.w] == 0 {
[INFO] [stdout] 140 | |                     return false;
[INFO] [stdout] 141 | |                 }
[INFO] [stdout] 142 | |             }
[INFO] [stdout]     | |_____________^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#collapsible_if
[INFO] [stdout]     = note: `#[warn(clippy::collapsible_if)]` on by default
[INFO] [stdout] help: collapse nested if block
[INFO] [stdout]     |
[INFO] [stdout] 137 ~             if self.config.use_diagonals
[INFO] [stdout] 138 ~                 && (down && left && self.diagonal_head_count[0][u / self.w + u % self.w] == 0 ||
[INFO] [stdout] 139 ~                     down && right && self.diagonal_head_count[1][u / self.w + self.w - u % self.w] == 0) {
[INFO] [stdout] 140 |                     return false;
[INFO] [stdout] 141 ~                 }
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]    --> src/search/mod.rs:287:9
[INFO] [stdout]     |
[INFO] [stdout] 287 |         return false;
[INFO] [stdout]     |         ^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]     |
[INFO] [stdout] 287 -         return false;
[INFO] [stdout] 287 +         false
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]    --> src/search/mod.rs:291:9
[INFO] [stdout]     |
[INFO] [stdout] 291 |         return !self.config.use_vcut || !self.vcut();
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]     |
[INFO] [stdout] 291 -         return !self.config.use_vcut || !self.vcut();
[INFO] [stdout] 291 +         !self.config.use_vcut || !self.vcut()
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]    --> src/search/mod.rs:314:9
[INFO] [stdout]     |
[INFO] [stdout] 314 |         return result;
[INFO] [stdout]     |         ^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]     |
[INFO] [stdout] 314 -         return result;
[INFO] [stdout] 314 +         result
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/dsu.rs:73:9
[INFO] [stdout]    |
[INFO] [stdout] 73 |         return false;
[INFO] [stdout]    |         ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 73 -         return false;
[INFO] [stdout] 73 +         false
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/gen.rs:41:9
[INFO] [stdout]    |
[INFO] [stdout] 41 | /         return Self {
[INFO] [stdout] 42 | |             h, w,
[INFO] [stdout] 43 | |             heads: vec![false; h * w],
[INFO] [stdout] 44 | |             dsu: UnionFind::from(vec![Dummy(); h * w]),
[INFO] [stdout] ...  |
[INFO] [stdout] 49 | |             allow_zigzag,
[INFO] [stdout] 50 | |         };
[INFO] [stdout]    | |_________^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 41 ~         Self {
[INFO] [stdout] 42 +             h, w,
[INFO] [stdout] 43 +             heads: vec![false; h * w],
[INFO] [stdout] 44 +             dsu: UnionFind::from(vec![Dummy(); h * w]),
[INFO] [stdout] 45 +             down: vec![false; h * w],
[INFO] [stdout] 46 +             right: vec![false; h * w],
[INFO] [stdout] 47 +             search_order,
[INFO] [stdout] 48 +             search_depth: 0,
[INFO] [stdout] 49 +             allow_zigzag,
[INFO] [stdout] 50 ~         }
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `GenFlow` has a public `len` method, but no `is_empty` method
[INFO] [stdout]   --> src/gen.rs:55:5
[INFO] [stdout]    |
[INFO] [stdout] 55 |     pub fn len(&self) -> usize { self.h * self.w }
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_without_is_empty
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: manual implementation of `.is_multiple_of()`
[INFO] [stdout]   --> src/gen.rs:61:11
[INFO] [stdout]    |
[INFO] [stdout] 61 |         ((u % self.w > 0 && self.right[u - 1]) as usize)
[INFO] [stdout]    |           ^^^^^^^^^^^^^^ help: replace with: `!u.is_multiple_of(self.w)`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#manual_is_multiple_of
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]    --> src/gen.rs:110:9
[INFO] [stdout]     |
[INFO] [stdout] 110 |         return true;
[INFO] [stdout]     |         ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]     |
[INFO] [stdout] 110 -         return true;
[INFO] [stdout] 110 +         true
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: manual implementation of `.is_multiple_of()`
[INFO] [stdout]   --> src/gen.rs:70:21
[INFO] [stdout]    |
[INFO] [stdout] 70 |            right && (u + 1) % self.w == 0 {
[INFO] [stdout]    |                     ^^^^^^^^^^^^^^^^^^^^^ help: replace with: `(u + 1).is_multiple_of(self.w)`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#manual_is_multiple_of
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: manual implementation of `.is_multiple_of()`
[INFO] [stdout]   --> src/gen.rs:84:24
[INFO] [stdout]    |
[INFO] [stdout] 84 |             if down && u % self.w > 0 && self.right[u - 1] && self.down[u - 1] {
[INFO] [stdout]    |                        ^^^^^^^^^^^^^^ help: replace with: `!u.is_multiple_of(self.w)`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#manual_is_multiple_of
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]    --> src/gen.rs:152:9
[INFO] [stdout]     |
[INFO] [stdout] 152 |         return board;
[INFO] [stdout]     |         ^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]     |
[INFO] [stdout] 152 -         return board;
[INFO] [stdout] 152 +         board
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]    --> src/gen.rs:171:9
[INFO] [stdout]     |
[INFO] [stdout] 171 |         return result;
[INFO] [stdout]     |         ^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]     |
[INFO] [stdout] 171 -         return result;
[INFO] [stdout] 171 +         result
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: writing `&Vec` instead of `&[_]` involves a new object where a slice will do
[INFO] [stdout]   --> src/lib.rs:43:15
[INFO] [stdout]    |
[INFO] [stdout] 43 | fn ccw(board: &Vec<Vec<usize>>) -> Vec<Vec<usize>> {
[INFO] [stdout]    |               ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#ptr_arg
[INFO] [stdout] help: change this to
[INFO] [stdout]    |
[INFO] [stdout] 43 - fn ccw(board: &Vec<Vec<usize>>) -> Vec<Vec<usize>> {
[INFO] [stdout] 43 + fn ccw(board: &[Vec<usize>]) -> Vec<Vec<usize>> {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this `if` statement can be collapsed
[INFO] [stdout]   --> src/lib.rs:61:5
[INFO] [stdout]    |
[INFO] [stdout] 61 | /     if cfg.use_table {
[INFO] [stdout] 62 | |         if visited.contains(&state.get_state()) {
[INFO] [stdout] 63 | |             return false;
[INFO] [stdout] 64 | |         }
[INFO] [stdout] 65 | |     }
[INFO] [stdout]    | |_____^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#collapsible_if
[INFO] [stdout] help: collapse nested if block
[INFO] [stdout]    |
[INFO] [stdout] 61 ~     if cfg.use_table
[INFO] [stdout] 62 ~         && visited.contains(&state.get_state()) {
[INFO] [stdout] 63 |             return false;
[INFO] [stdout] 64 ~         }
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: manual implementation of `.is_multiple_of()`
[INFO] [stdout]   --> src/lib.rs:68:12
[INFO] [stdout]    |
[INFO] [stdout] 68 |         if *num_nodes % period == 0 {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^^^^ help: replace with: `(*num_nodes).is_multiple_of(period)`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#manual_is_multiple_of
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `oth`
[INFO] [stdout]  --> src/gen.rs:7:20
[INFO] [stdout]   |
[INFO] [stdout] 7 |     fn unite(self, oth: Self, u: usize, v: usize) -> Option<Self> { Some(Dummy()) }
[INFO] [stdout]   |                    ^^^ help: if this is intentional, prefix it with an underscore: `_oth`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `u`
[INFO] [stdout]  --> src/gen.rs:7:31
[INFO] [stdout]   |
[INFO] [stdout] 7 |     fn unite(self, oth: Self, u: usize, v: usize) -> Option<Self> { Some(Dummy()) }
[INFO] [stdout]   |                               ^ help: if this is intentional, prefix it with an underscore: `_u`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `v`
[INFO] [stdout]  --> src/gen.rs:7:41
[INFO] [stdout]   |
[INFO] [stdout] 7 |     fn unite(self, oth: Self, u: usize, v: usize) -> Option<Self> { Some(Dummy()) }
[INFO] [stdout]   |                                         ^ help: if this is intentional, prefix it with an underscore: `_v`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `hash_multiplier` is never read
[INFO] [stdout]   --> src/search/mod.rs:33:5
[INFO] [stdout]    |
[INFO] [stdout] 18 | pub struct SearchFlow {
[INFO] [stdout]    |            ---------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 33 |     hash_multiplier: Vec<Modnum>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `SearchFlow` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `get_degree` is never used
[INFO] [stdout]    --> src/search/mod.rs:107:8
[INFO] [stdout]     |
[INFO] [stdout]  38 | impl SearchFlow {
[INFO] [stdout]     | --------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 107 |     fn get_degree(&self, u: usize) -> usize {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/search/modnum.rs:13:9
[INFO] [stdout]    |
[INFO] [stdout] 13 |         return Self(if sum >= HASH_MODULO { sum - HASH_MODULO } else { sum });
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout]    = note: `#[warn(clippy::needless_return)]` on by default
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 13 -         return Self(if sum >= HASH_MODULO { sum - HASH_MODULO } else { sum });
[INFO] [stdout] 13 +         Self(if sum >= HASH_MODULO { sum - HASH_MODULO } else { sum })
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/search/modnum.rs:22:9
[INFO] [stdout]    |
[INFO] [stdout] 22 |         return Self(if diff < 0 { diff + HASH_MODULO } else { diff });
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 22 -         return Self(if diff < 0 { diff + HASH_MODULO } else { diff });
[INFO] [stdout] 22 +         Self(if diff < 0 { diff + HASH_MODULO } else { diff })
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/search/modnum.rs:30:9
[INFO] [stdout]    |
[INFO] [stdout] 30 |         return Self(((self.0 as i64) * (oth.0 as i64) % (HASH_MODULO as i64)) as i32);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 30 -         return Self(((self.0 as i64) * (oth.0 as i64) % (HASH_MODULO as i64)) as i32);
[INFO] [stdout] 30 +         Self(((self.0 as i64) * (oth.0 as i64) % (HASH_MODULO as i64)) as i32)
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/search/mod.rs:83:9
[INFO] [stdout]    |
[INFO] [stdout] 83 | /         return Self {
[INFO] [stdout] 84 | |             h, w, heads, dsu,
[INFO] [stdout] 85 | |             down: vec![false; h * w],
[INFO] [stdout] 86 | |             right: vec![false; h * w],
[INFO] [stdout] ...  |
[INFO] [stdout] 91 | |             config,
[INFO] [stdout] 92 | |         };
[INFO] [stdout]    | |_________^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 83 ~         Self {
[INFO] [stdout] 84 +             h, w, heads, dsu,
[INFO] [stdout] 85 +             down: vec![false; h * w],
[INFO] [stdout] 86 +             right: vec![false; h * w],
[INFO] [stdout] 87 +             search_order,
[INFO] [stdout] 88 +             search_depth: 0,
[INFO] [stdout] 89 +             diagonal_head_count,
[INFO] [stdout] 90 +             hash_multiplier,
[INFO] [stdout] 91 +             config,
[INFO] [stdout] 92 ~         }
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: writing `&Vec` instead of `&[_]` involves a new object where a slice will do
[INFO] [stdout]   --> src/search/mod.rs:39:36
[INFO] [stdout]    |
[INFO] [stdout] 39 |     pub fn from_with_config(board: &Vec<Vec<usize>>, config: SearchConfig) -> Self {
[INFO] [stdout]    |                                    ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#ptr_arg
[INFO] [stdout]    = note: `#[warn(clippy::ptr_arg)]` on by default
[INFO] [stdout] help: change this to
[INFO] [stdout]    |
[INFO] [stdout] 39 -     pub fn from_with_config(board: &Vec<Vec<usize>>, config: SearchConfig) -> Self {
[INFO] [stdout] 39 +     pub fn from_with_config(board: &[Vec<usize>], config: SearchConfig) -> Self {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `SearchFlow` has a public `len` method, but no `is_empty` method
[INFO] [stdout]   --> src/search/mod.rs:97:5
[INFO] [stdout]    |
[INFO] [stdout] 97 |     pub fn len(&self) -> usize { self.h * self.w }
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_without_is_empty
[INFO] [stdout]    = note: `#[warn(clippy::len_without_is_empty)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: manual implementation of `.is_multiple_of()`
[INFO] [stdout]    --> src/search/mod.rs:109:11
[INFO] [stdout]     |
[INFO] [stdout] 109 |         ((u % self.w > 0 && self.right[u - 1]) as usize)
[INFO] [stdout]     |           ^^^^^^^^^^^^^^ help: replace with: `!u.is_multiple_of(self.w)`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#manual_is_multiple_of
[INFO] [stdout]     = note: `#[warn(clippy::manual_is_multiple_of)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this boolean expression can be simplified
[INFO] [stdout]    --> src/search/mod.rs:130:16
[INFO] [stdout]     |
[INFO] [stdout] 130 |               if right && up && self.right[u - self.w] ||
[INFO] [stdout]     |  ________________^
[INFO] [stdout] 131 | |                 right && up && self.down[u - self.w + 1] ||
[INFO] [stdout]     | |________________________________________________________^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#nonminimal_bool
[INFO] [stdout]     = note: `#[warn(clippy::nonminimal_bool)]` on by default
[INFO] [stdout] help: try
[INFO] [stdout]     |
[INFO] [stdout] 130 -             if right && up && self.right[u - self.w] ||
[INFO] [stdout] 131 -                 right && up && self.down[u - self.w + 1] ||
[INFO] [stdout] 130 +             if !(!right || !up || !self.right[u - self.w] && !self.down[u - self.w + 1]) ||
[INFO] [stdout]     |
[INFO] [stdout] 130 -             if right && up && self.right[u - self.w] ||
[INFO] [stdout] 131 -                 right && up && self.down[u - self.w + 1] ||
[INFO] [stdout] 130 +             if (self.down[u - self.w + 1] || self.right[u - self.w]) && up && right ||
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]    --> src/search/mod.rs:170:9
[INFO] [stdout]     |
[INFO] [stdout] 170 |         return true;
[INFO] [stdout]     |         ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]     |
[INFO] [stdout] 170 -         return true;
[INFO] [stdout] 170 +         true
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: manual implementation of `.is_multiple_of()`
[INFO] [stdout]    --> src/search/mod.rs:118:20
[INFO] [stdout]     |
[INFO] [stdout] 118 |         let left = u % self.w > 0 && self.right[u - 1];
[INFO] [stdout]     |                    ^^^^^^^^^^^^^^ help: replace with: `!u.is_multiple_of(self.w)`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#manual_is_multiple_of
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: manual implementation of `.is_multiple_of()`
[INFO] [stdout]    --> src/search/mod.rs:125:21
[INFO] [stdout]     |
[INFO] [stdout] 125 |            right && (u + 1) % self.w == 0 {
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^^^^^^ help: replace with: `(u + 1).is_multiple_of(self.w)`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#manual_is_multiple_of
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this `if` statement can be collapsed
[INFO] [stdout]    --> src/search/mod.rs:137:13
[INFO] [stdout]     |
[INFO] [stdout] 137 | /             if self.config.use_diagonals {
[INFO] [stdout] 138 | |                 if down && left && self.diagonal_head_count[0][u / self.w + u % self.w] == 0 ||
[INFO] [stdout] 139 | |                     down && right && self.diagonal_head_count[1][u / self.w + self.w - u % self.w] == 0 {
[INFO] [stdout] 140 | |                     return false;
[INFO] [stdout] 141 | |                 }
[INFO] [stdout] 142 | |             }
[INFO] [stdout]     | |_____________^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#collapsible_if
[INFO] [stdout]     = note: `#[warn(clippy::collapsible_if)]` on by default
[INFO] [stdout] help: collapse nested if block
[INFO] [stdout]     |
[INFO] [stdout] 137 ~             if self.config.use_diagonals
[INFO] [stdout] 138 ~                 && (down && left && self.diagonal_head_count[0][u / self.w + u % self.w] == 0 ||
[INFO] [stdout] 139 ~                     down && right && self.diagonal_head_count[1][u / self.w + self.w - u % self.w] == 0) {
[INFO] [stdout] 140 |                     return false;
[INFO] [stdout] 141 ~                 }
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]    --> src/search/mod.rs:287:9
[INFO] [stdout]     |
[INFO] [stdout] 287 |         return false;
[INFO] [stdout]     |         ^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]     |
[INFO] [stdout] 287 -         return false;
[INFO] [stdout] 287 +         false
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]    --> src/search/mod.rs:291:9
[INFO] [stdout]     |
[INFO] [stdout] 291 |         return !self.config.use_vcut || !self.vcut();
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]     |
[INFO] [stdout] 291 -         return !self.config.use_vcut || !self.vcut();
[INFO] [stdout] 291 +         !self.config.use_vcut || !self.vcut()
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]    --> src/search/mod.rs:314:9
[INFO] [stdout]     |
[INFO] [stdout] 314 |         return result;
[INFO] [stdout]     |         ^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]     |
[INFO] [stdout] 314 -         return result;
[INFO] [stdout] 314 +         result
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/dsu.rs:73:9
[INFO] [stdout]    |
[INFO] [stdout] 73 |         return false;
[INFO] [stdout]    |         ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 73 -         return false;
[INFO] [stdout] 73 +         false
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/gen.rs:41:9
[INFO] [stdout]    |
[INFO] [stdout] 41 | /         return Self {
[INFO] [stdout] 42 | |             h, w,
[INFO] [stdout] 43 | |             heads: vec![false; h * w],
[INFO] [stdout] 44 | |             dsu: UnionFind::from(vec![Dummy(); h * w]),
[INFO] [stdout] ...  |
[INFO] [stdout] 49 | |             allow_zigzag,
[INFO] [stdout] 50 | |         };
[INFO] [stdout]    | |_________^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 41 ~         Self {
[INFO] [stdout] 42 +             h, w,
[INFO] [stdout] 43 +             heads: vec![false; h * w],
[INFO] [stdout] 44 +             dsu: UnionFind::from(vec![Dummy(); h * w]),
[INFO] [stdout] 45 +             down: vec![false; h * w],
[INFO] [stdout] 46 +             right: vec![false; h * w],
[INFO] [stdout] 47 +             search_order,
[INFO] [stdout] 48 +             search_depth: 0,
[INFO] [stdout] 49 +             allow_zigzag,
[INFO] [stdout] 50 ~         }
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `GenFlow` has a public `len` method, but no `is_empty` method
[INFO] [stdout]   --> src/gen.rs:55:5
[INFO] [stdout]    |
[INFO] [stdout] 55 |     pub fn len(&self) -> usize { self.h * self.w }
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_without_is_empty
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: manual implementation of `.is_multiple_of()`
[INFO] [stdout]   --> src/gen.rs:61:11
[INFO] [stdout]    |
[INFO] [stdout] 61 |         ((u % self.w > 0 && self.right[u - 1]) as usize)
[INFO] [stdout]    |           ^^^^^^^^^^^^^^ help: replace with: `!u.is_multiple_of(self.w)`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#manual_is_multiple_of
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]    --> src/gen.rs:110:9
[INFO] [stdout]     |
[INFO] [stdout] 110 |         return true;
[INFO] [stdout]     |         ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]     |
[INFO] [stdout] 110 -         return true;
[INFO] [stdout] 110 +         true
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: manual implementation of `.is_multiple_of()`
[INFO] [stdout]   --> src/gen.rs:70:21
[INFO] [stdout]    |
[INFO] [stdout] 70 |            right && (u + 1) % self.w == 0 {
[INFO] [stdout]    |                     ^^^^^^^^^^^^^^^^^^^^^ help: replace with: `(u + 1).is_multiple_of(self.w)`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#manual_is_multiple_of
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: manual implementation of `.is_multiple_of()`
[INFO] [stdout]   --> src/gen.rs:84:24
[INFO] [stdout]    |
[INFO] [stdout] 84 |             if down && u % self.w > 0 && self.right[u - 1] && self.down[u - 1] {
[INFO] [stdout]    |                        ^^^^^^^^^^^^^^ help: replace with: `!u.is_multiple_of(self.w)`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#manual_is_multiple_of
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]    --> src/gen.rs:152:9
[INFO] [stdout]     |
[INFO] [stdout] 152 |         return board;
[INFO] [stdout]     |         ^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]     |
[INFO] [stdout] 152 -         return board;
[INFO] [stdout] 152 +         board
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]    --> src/gen.rs:171:9
[INFO] [stdout]     |
[INFO] [stdout] 171 |         return result;
[INFO] [stdout]     |         ^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]     |
[INFO] [stdout] 171 -         return result;
[INFO] [stdout] 171 +         result
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: writing `&Vec` instead of `&[_]` involves a new object where a slice will do
[INFO] [stdout]   --> src/lib.rs:43:15
[INFO] [stdout]    |
[INFO] [stdout] 43 | fn ccw(board: &Vec<Vec<usize>>) -> Vec<Vec<usize>> {
[INFO] [stdout]    |               ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#ptr_arg
[INFO] [stdout] help: change this to
[INFO] [stdout]    |
[INFO] [stdout] 43 - fn ccw(board: &Vec<Vec<usize>>) -> Vec<Vec<usize>> {
[INFO] [stdout] 43 + fn ccw(board: &[Vec<usize>]) -> Vec<Vec<usize>> {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this `if` statement can be collapsed
[INFO] [stdout]   --> src/lib.rs:61:5
[INFO] [stdout]    |
[INFO] [stdout] 61 | /     if cfg.use_table {
[INFO] [stdout] 62 | |         if visited.contains(&state.get_state()) {
[INFO] [stdout] 63 | |             return false;
[INFO] [stdout] 64 | |         }
[INFO] [stdout] 65 | |     }
[INFO] [stdout]    | |_____^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#collapsible_if
[INFO] [stdout] help: collapse nested if block
[INFO] [stdout]    |
[INFO] [stdout] 61 ~     if cfg.use_table
[INFO] [stdout] 62 ~         && visited.contains(&state.get_state()) {
[INFO] [stdout] 63 |             return false;
[INFO] [stdout] 64 ~         }
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: manual implementation of `.is_multiple_of()`
[INFO] [stdout]   --> src/lib.rs:68:12
[INFO] [stdout]    |
[INFO] [stdout] 68 |         if *num_nodes % period == 0 {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^^^^ help: replace with: `(*num_nodes).is_multiple_of(period)`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#manual_is_multiple_of
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `collections::HashSet` and `time::Instant`
[INFO] [stdout]  --> src/main.rs:1:11
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{time::Instant, collections::HashSet};
[INFO] [stdout]   |           ^^^^^^^^^^^^^  ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `collections::HashSet` and `time::Instant`
[INFO] [stdout]  --> src/main.rs:1:11
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{time::Instant, collections::HashSet};
[INFO] [stdout]   |           ^^^^^^^^^^^^^  ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `it`
[INFO] [stdout]   --> src/main.rs:23:9
[INFO] [stdout]    |
[INFO] [stdout] 23 |     for it in 0..16 {
[INFO] [stdout]    |         ^^ help: if this is intentional, prefix it with an underscore: `_it`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:59:9
[INFO] [stdout]    |
[INFO] [stdout] 59 |     let mut board: Vec<Vec<usize>> = input.lines().map(|line| {
[INFO] [stdout]    |         ----^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `h`
[INFO] [stdout]   --> src/main.rs:67:14
[INFO] [stdout]    |
[INFO] [stdout] 67 |         let (h, w, down, right) = {
[INFO] [stdout]    |              ^ help: if this is intentional, prefix it with an underscore: `_h`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `w`
[INFO] [stdout]   --> src/main.rs:67:17
[INFO] [stdout]    |
[INFO] [stdout] 67 |         let (h, w, down, right) = {
[INFO] [stdout]    |                 ^ help: if this is intentional, prefix it with an underscore: `_w`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `down`
[INFO] [stdout]   --> src/main.rs:67:20
[INFO] [stdout]    |
[INFO] [stdout] 67 |         let (h, w, down, right) = {
[INFO] [stdout]    |                    ^^^^ help: if this is intentional, prefix it with an underscore: `_down`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `right`
[INFO] [stdout]   --> src/main.rs:67:26
[INFO] [stdout]    |
[INFO] [stdout] 67 |         let (h, w, down, right) = {
[INFO] [stdout]    |                          ^^^^^ help: if this is intentional, prefix it with an underscore: `_right`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/main.rs:32:5
[INFO] [stdout]    |
[INFO] [stdout] 32 |     return false;
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout]    = note: `#[warn(clippy::needless_return)]` on by default
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 32 -     return false;
[INFO] [stdout] 32 +     false
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `it`
[INFO] [stdout]   --> src/main.rs:23:9
[INFO] [stdout]    |
[INFO] [stdout] 23 |     for it in 0..16 {
[INFO] [stdout]    |         ^^ help: if this is intentional, prefix it with an underscore: `_it`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:59:9
[INFO] [stdout]    |
[INFO] [stdout] 59 |     let mut board: Vec<Vec<usize>> = input.lines().map(|line| {
[INFO] [stdout]    |         ----^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `h`
[INFO] [stdout]   --> src/main.rs:67:14
[INFO] [stdout]    |
[INFO] [stdout] 67 |         let (h, w, down, right) = {
[INFO] [stdout]    |              ^ help: if this is intentional, prefix it with an underscore: `_h`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `w`
[INFO] [stdout]   --> src/main.rs:67:17
[INFO] [stdout]    |
[INFO] [stdout] 67 |         let (h, w, down, right) = {
[INFO] [stdout]    |                 ^ help: if this is intentional, prefix it with an underscore: `_w`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `down`
[INFO] [stdout]   --> src/main.rs:67:20
[INFO] [stdout]    |
[INFO] [stdout] 67 |         let (h, w, down, right) = {
[INFO] [stdout]    |                    ^^^^ help: if this is intentional, prefix it with an underscore: `_down`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `right`
[INFO] [stdout]   --> src/main.rs:67:26
[INFO] [stdout]    |
[INFO] [stdout] 67 |         let (h, w, down, right) = {
[INFO] [stdout]    |                          ^^^^^ help: if this is intentional, prefix it with an underscore: `_right`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/main.rs:32:5
[INFO] [stdout]    |
[INFO] [stdout] 32 |     return false;
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout]    = note: `#[warn(clippy::needless_return)]` on by default
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 32 -     return false;
[INFO] [stdout] 32 +     false
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 24.35s
[INFO] running `Command { std: "docker" "inspect" "9b7a8c26620fd05125b57b1815484e3cf8419d6f57ca9ef69f3c9f7691fe8771", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9b7a8c26620fd05125b57b1815484e3cf8419d6f57ca9ef69f3c9f7691fe8771", kill_on_drop: false }`
[INFO] [stdout] 9b7a8c26620fd05125b57b1815484e3cf8419d6f57ca9ef69f3c9f7691fe8771