[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] testing timmy-feng/flow-solver against beta-2026-04-21 for beta-1.96-1 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftimmy-feng%2Fflow-solver" "/workspace/builds/worker-3-tc2/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc2/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-3-tc2/source/Cargo.toml [INFO] validating manifest of git repo https://github.com/timmy-feng/flow-solver on toolchain beta-2026-04-21 [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2026-04-21" "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" "+beta-2026-04-21" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] [stderr] Downloading crates ... [INFO] [stderr] Downloaded bitflags v2.9.3 [INFO] [stderr] Downloaded windows-targets v0.53.3 [INFO] [stderr] Downloaded tower-http v0.5.2 [INFO] [stderr] Downloaded anstream v0.6.20 [INFO] [stderr] Downloaded serde_path_to_error v0.1.17 [INFO] [stderr] Downloaded clap_derive v4.5.45 [INFO] [stderr] Downloaded clap v4.5.45 [INFO] [stderr] Downloaded redox_syscall v0.5.17 [INFO] [stderr] Downloaded hyper-util v0.1.16 [INFO] [stderr] Downloaded cc v1.2.34 [INFO] [stderr] Downloaded tokio-util v0.7.16 [INFO] [stderr] Downloaded hyper v1.7.0 [INFO] [stderr] Downloaded clap_builder v4.5.44 [INFO] [stderr] Downloaded serde_json v1.0.143 [INFO] [stderr] Downloaded tokio v1.42.1 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/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" "+beta-2026-04-21" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 39a1375580ed400f7e670bcd94c42bf3f454b4d8c3012f8d9d084314f9c55721 [INFO] running `Command { std: "docker" "start" "-a" "39a1375580ed400f7e670bcd94c42bf3f454b4d8c3012f8d9d084314f9c55721", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "39a1375580ed400f7e670bcd94c42bf3f454b4d8c3012f8d9d084314f9c55721", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "39a1375580ed400f7e670bcd94c42bf3f454b4d8c3012f8d9d084314f9c55721", kill_on_drop: false }` [INFO] [stdout] 39a1375580ed400f7e670bcd94c42bf3f454b4d8c3012f8d9d084314f9c55721 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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" "+beta-2026-04-21" "build" "--frozen" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] b9f071e796501b2385d2abcd7040df91e2dbfb234435dd09ebac3ec785c68299 [INFO] running `Command { std: "docker" "start" "-a" "b9f071e796501b2385d2abcd7040df91e2dbfb234435dd09ebac3ec785c68299", kill_on_drop: false }` [INFO] [stderr] Compiling proc-macro2 v1.0.101 [INFO] [stderr] Compiling libc v0.2.151 [INFO] [stderr] Compiling smallvec v1.15.1 [INFO] [stderr] Compiling serde v1.0.219 [INFO] [stderr] Compiling lock_api v0.4.13 [INFO] [stderr] Compiling tracing-core v0.1.34 [INFO] [stderr] Compiling rustversion v1.0.22 [INFO] [stderr] Compiling percent-encoding v2.3.2 [INFO] [stderr] Compiling unicase v2.8.1 [INFO] [stderr] Compiling httpdate v1.0.3 [INFO] [stderr] Compiling anstyle-parse v0.2.7 [INFO] [stderr] Compiling sync_wrapper v1.0.2 [INFO] [stderr] Compiling serde_json v1.0.143 [INFO] [stderr] Compiling anstyle v1.0.11 [INFO] [stderr] Compiling is_terminal_polyfill v1.70.1 [INFO] [stderr] Compiling anstyle-query v1.1.4 [INFO] [stderr] Compiling colorchoice v1.0.4 [INFO] [stderr] Compiling form_urlencoded v1.2.2 [INFO] [stderr] Compiling clap_lex v0.7.5 [INFO] [stderr] Compiling memchr v2.7.5 [INFO] [stderr] Compiling ppv-lite86 v0.2.17 [INFO] [stderr] Compiling matchit v0.7.3 [INFO] [stderr] Compiling anstream v0.6.20 [INFO] [stderr] Compiling bitflags v2.9.3 [INFO] [stderr] Compiling http-range-header v0.4.2 [INFO] [stderr] Compiling mime_guess v2.0.5 [INFO] [stderr] Compiling clap_builder v4.5.44 [INFO] [stderr] Compiling quote v1.0.40 [INFO] [stderr] Compiling tracing v0.1.41 [INFO] [stderr] Compiling syn v2.0.106 [INFO] [stderr] Compiling parking_lot_core v0.9.11 [INFO] [stderr] Compiling mio v1.0.2 [INFO] [stderr] Compiling signal-hook-registry v1.4.6 [INFO] [stderr] Compiling socket2 v0.5.8 [INFO] [stderr] Compiling getrandom v0.2.11 [INFO] [stderr] Compiling rand_core v0.6.4 [INFO] [stderr] Compiling parking_lot v0.12.4 [INFO] [stderr] Compiling rand_chacha v0.3.1 [INFO] [stderr] Compiling 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] Compiling tokio v1.42.1 [INFO] [stderr] Compiling axum-core v0.4.5 [INFO] [stderr] Compiling clap v4.5.45 [INFO] [stderr] Compiling serde_urlencoded v0.7.1 [INFO] [stderr] Compiling serde_path_to_error v0.1.17 [INFO] [stderr] Compiling hyper v1.7.0 [INFO] [stderr] Compiling tower v0.5.2 [INFO] [stderr] Compiling tokio-util v0.7.16 [INFO] [stderr] Compiling tower-http v0.5.2 [INFO] [stderr] Compiling hyper-util v0.1.16 [INFO] [stderr] Compiling axum v0.7.9 [INFO] [stderr] Compiling 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 { 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 { 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 { 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, [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: 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> = 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] [stderr] Finished `dev` profile [unoptimized + debuginfo] target(s) in 20.98s [INFO] running `Command { std: "docker" "inspect" "b9f071e796501b2385d2abcd7040df91e2dbfb234435dd09ebac3ec785c68299", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "b9f071e796501b2385d2abcd7040df91e2dbfb234435dd09ebac3ec785c68299", kill_on_drop: false }` [INFO] [stdout] b9f071e796501b2385d2abcd7040df91e2dbfb234435dd09ebac3ec785c68299 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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" "+beta-2026-04-21" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 2f0d8d178f5f4013d5d950ac000aace8c4b7c2ecb184ccf1c8d8ca95bb63b46c [INFO] running `Command { std: "docker" "start" "-a" "2f0d8d178f5f4013d5d950ac000aace8c4b7c2ecb184ccf1c8d8ca95bb63b46c", kill_on_drop: false }` [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 { 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 { 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 { 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, [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] [stderr] Compiling flow_solver v0.1.0 (/opt/rustwide/workdir) [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> = 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: 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 { 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 { 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 { 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, [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] [stderr] Finished `test` profile [unoptimized + debuginfo] target(s) in 0.25s [INFO] running `Command { std: "docker" "inspect" "2f0d8d178f5f4013d5d950ac000aace8c4b7c2ecb184ccf1c8d8ca95bb63b46c", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "2f0d8d178f5f4013d5d950ac000aace8c4b7c2ecb184ccf1c8d8ca95bb63b46c", kill_on_drop: false }` [INFO] [stdout] 2f0d8d178f5f4013d5d950ac000aace8c4b7c2ecb184ccf1c8d8ca95bb63b46c [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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" "+beta-2026-04-21" "test" "--frozen", kill_on_drop: false }` [INFO] [stdout] 7c9646261a1def5ec70f48483e25518d1afbfff1e9f53a5b2ea8e6df35324be1 [INFO] running `Command { std: "docker" "start" "-a" "7c9646261a1def5ec70f48483e25518d1afbfff1e9f53a5b2ea8e6df35324be1", kill_on_drop: false }` [INFO] [stderr] warning: unused variable: `oth` [INFO] [stderr] --> src/gen.rs:7:20 [INFO] [stderr] | [INFO] [stderr] 7 | fn unite(self, oth: Self, u: usize, v: usize) -> Option { Some(Dummy()) } [INFO] [stderr] | ^^^ help: if this is intentional, prefix it with an underscore: `_oth` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default [INFO] [stderr] [INFO] [stderr] warning: unused variable: `u` [INFO] [stderr] --> src/gen.rs:7:31 [INFO] [stderr] | [INFO] [stderr] 7 | fn unite(self, oth: Self, u: usize, v: usize) -> Option { Some(Dummy()) } [INFO] [stderr] | ^ help: if this is intentional, prefix it with an underscore: `_u` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `v` [INFO] [stderr] --> src/gen.rs:7:41 [INFO] [stderr] | [INFO] [stderr] 7 | fn unite(self, oth: Self, u: usize, v: usize) -> Option { Some(Dummy()) } [INFO] [stderr] | ^ help: if this is intentional, prefix it with an underscore: `_v` [INFO] [stderr] [INFO] [stderr] warning: field `hash_multiplier` is never read [INFO] [stderr] --> src/search/mod.rs:33:5 [INFO] [stderr] | [INFO] [stderr] 18 | pub struct SearchFlow { [INFO] [stderr] | ---------- field in this struct [INFO] [stderr] ... [INFO] [stderr] 33 | hash_multiplier: Vec, [INFO] [stderr] | ^^^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `SearchFlow` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis [INFO] [stderr] = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default [INFO] [stderr] [INFO] [stderr] warning: method `get_degree` is never used [INFO] [stderr] --> src/search/mod.rs:107:8 [INFO] [stderr] | [INFO] [stderr] 38 | impl SearchFlow { [INFO] [stderr] | --------------- method in this implementation [INFO] [stderr] ... [INFO] [stderr] 107 | fn get_degree(&self, u: usize) -> usize { [INFO] [stderr] | ^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: `flow_solver` (lib) generated 5 warnings (run `cargo fix --lib -p flow_solver` to apply 3 suggestions) [INFO] [stderr] warning: `flow_solver` (lib test) generated 5 warnings (5 duplicates) [INFO] [stderr] warning: unused imports: `collections::HashSet` and `time::Instant` [INFO] [stderr] --> src/main.rs:1:11 [INFO] [stderr] | [INFO] [stderr] 1 | use std::{time::Instant, collections::HashSet}; [INFO] [stderr] | ^^^^^^^^^^^^^ ^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default [INFO] [stderr] [INFO] [stderr] warning: unused variable: `it` [INFO] [stderr] --> src/main.rs:23:9 [INFO] [stderr] | [INFO] [stderr] 23 | for it in 0..16 { [INFO] [stderr] | ^^ help: if this is intentional, prefix it with an underscore: `_it` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default [INFO] [stderr] [INFO] [stderr] warning: variable does not need to be mutable [INFO] [stderr] --> src/main.rs:59:9 [INFO] [stderr] | [INFO] [stderr] 59 | let mut board: Vec> = input.lines().map(|line| { [INFO] [stderr] | ----^^^^^ [INFO] [stderr] | | [INFO] [stderr] | help: remove this `mut` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default [INFO] [stderr] [INFO] [stderr] warning: unused variable: `h` [INFO] [stderr] --> src/main.rs:67:14 [INFO] [stderr] | [INFO] [stderr] 67 | let (h, w, down, right) = { [INFO] [stderr] | ^ help: if this is intentional, prefix it with an underscore: `_h` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `w` [INFO] [stderr] --> src/main.rs:67:17 [INFO] [stderr] | [INFO] [stderr] 67 | let (h, w, down, right) = { [INFO] [stderr] | ^ help: if this is intentional, prefix it with an underscore: `_w` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `down` [INFO] [stderr] --> src/main.rs:67:20 [INFO] [stderr] | [INFO] [stderr] 67 | let (h, w, down, right) = { [INFO] [stderr] | ^^^^ help: if this is intentional, prefix it with an underscore: `_down` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `right` [INFO] [stderr] --> src/main.rs:67:26 [INFO] [stderr] | [INFO] [stderr] 67 | let (h, w, down, right) = { [INFO] [stderr] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_right` [INFO] [stderr] [INFO] [stderr] warning: `flow_solver` (bin "flow_solver" test) generated 7 warnings (run `cargo fix --bin "flow_solver" -p flow_solver --tests` to apply 7 suggestions) [INFO] [stderr] Finished `test` profile [unoptimized + debuginfo] target(s) in 0.06s [INFO] [stderr] Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/flow_solver-e7c7abe18394e4ba) [INFO] [stdout] [INFO] [stdout] running 0 tests [INFO] [stdout] [INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s [INFO] [stdout] [INFO] [stderr] Running unittests src/main.rs (/opt/rustwide/target/debug/deps/flow_solver-78b378666e0ed077) [INFO] [stdout] [INFO] [stdout] running 0 tests [INFO] [stdout] [INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s [INFO] [stdout] [INFO] [stderr] Running unittests src/bin/server.rs (/opt/rustwide/target/debug/deps/server-b058cecf52fe5e61) [INFO] [stdout] [INFO] [stdout] running 0 tests [INFO] [stdout] [INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s [INFO] [stdout] [INFO] [stderr] Doc-tests flow_solver [INFO] [stdout] [INFO] [stdout] running 0 tests [INFO] [stdout] [INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s [INFO] [stdout] [INFO] running `Command { std: "docker" "inspect" "7c9646261a1def5ec70f48483e25518d1afbfff1e9f53a5b2ea8e6df35324be1", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "7c9646261a1def5ec70f48483e25518d1afbfff1e9f53a5b2ea8e6df35324be1", kill_on_drop: false }` [INFO] [stdout] 7c9646261a1def5ec70f48483e25518d1afbfff1e9f53a5b2ea8e6df35324be1