[INFO] cloning repository https://github.com/hendrikcech/hashcode-2018-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/hendrikcech/hashcode-2018-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhendrikcech%2Fhashcode-2018-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhendrikcech%2Fhashcode-2018-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] b980b3bf0f26df3bbcede8bbe1baa55fa22e944e
[INFO] testing hendrikcech/hashcode-2018-rust against beta-2026-04-21 for beta-1.96-2
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhendrikcech%2Fhashcode-2018-rust" "/workspace/builds/worker-4-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/hendrikcech/hashcode-2018-rust
[INFO] finished tweaking git repo https://github.com/hendrikcech/hashcode-2018-rust
[INFO] tweaked toml for git repo https://github.com/hendrikcech/hashcode-2018-rust written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/hendrikcech/hashcode-2018-rust 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/hendrikcech/hashcode-2018-rust 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] warning: `package.edition` is unspecified, defaulting to `2015` while the latest is `2024`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] 53f57713e1b258d70f6a3518dc272989918dedc3ae058272387236fbb14b8789
[INFO] running `Command { std: "docker" "start" "-a" "53f57713e1b258d70f6a3518dc272989918dedc3ae058272387236fbb14b8789", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "53f57713e1b258d70f6a3518dc272989918dedc3ae058272387236fbb14b8789", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "53f57713e1b258d70f6a3518dc272989918dedc3ae058272387236fbb14b8789", kill_on_drop: false }`
[INFO] [stdout] 53f57713e1b258d70f6a3518dc272989918dedc3ae058272387236fbb14b8789
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] 8ce884439106bcd59eb58f0dd65f6314412cd19885d0af9596a5eebfb6f21ea4
[INFO] running `Command { std: "docker" "start" "-a" "8ce884439106bcd59eb58f0dd65f6314412cd19885d0af9596a5eebfb6f21ea4", kill_on_drop: false }`
[INFO] [stderr] warning: `package.edition` is unspecified, defaulting to `2015` while the latest is `2024`
[INFO] [stderr]    Compiling hashcode2018 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/simulation.rs:24:21
[INFO] [stdout]    |
[INFO] [stdout] 24 |                 let mut vehicle = &mut self.vehicles[vehicle_id];
[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: variable does not need to be mutable
[INFO] [stdout]   --> src/simulation.rs:25:21
[INFO] [stdout]    |
[INFO] [stdout] 25 |                 let mut ride = &mut self.rides[*ride_id];
[INFO] [stdout]    |                     ----^^^^
[INFO] [stdout]    |                     |
[INFO] [stdout]    |                     help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/solver.rs:52:21
[INFO] [stdout]    |
[INFO] [stdout] 52 |                 let mut ride = &mut self.rides[ride_id];
[INFO] [stdout]    |                     ----^^^^
[INFO] [stdout]    |                     |
[INFO] [stdout]    |                     help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `rows`, `cols`, and `n_rides` are never read
[INFO] [stdout]   --> src/model.rs:24:9
[INFO] [stdout]    |
[INFO] [stdout] 23 | pub struct Problem {
[INFO] [stdout]    |            ------- fields in this struct
[INFO] [stdout] 24 |     pub rows: usize,
[INFO] [stdout]    |         ^^^^
[INFO] [stdout] 25 |     pub cols: usize,
[INFO] [stdout]    |         ^^^^
[INFO] [stdout] 26 |     pub n_vehicles: usize,
[INFO] [stdout] 27 |     pub n_rides: usize,
[INFO] [stdout]    |         ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Problem` 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] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.58s
[INFO] running `Command { std: "docker" "inspect" "8ce884439106bcd59eb58f0dd65f6314412cd19885d0af9596a5eebfb6f21ea4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8ce884439106bcd59eb58f0dd65f6314412cd19885d0af9596a5eebfb6f21ea4", kill_on_drop: false }`
[INFO] [stdout] 8ce884439106bcd59eb58f0dd65f6314412cd19885d0af9596a5eebfb6f21ea4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] 865c825c369d6070aea791265f4f47ed809cca857390e2a58ff1dd99752e61c9
[INFO] running `Command { std: "docker" "start" "-a" "865c825c369d6070aea791265f4f47ed809cca857390e2a58ff1dd99752e61c9", kill_on_drop: false }`
[INFO] [stderr] warning: `package.edition` is unspecified, defaulting to `2015` while the latest is `2024`
[INFO] [stderr]    Compiling hashcode2018 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]    --> src/main.rs:159:48
[INFO] [stdout]     |
[INFO] [stdout] 159 |         let (score, errors) = simulation.score(assignment);
[INFO] [stdout]     |                                          ----- ^^^^^^^^^^ expected `&[Vec<usize>]`, found `Vec<Vec<usize>>`
[INFO] [stdout]     |                                          |
[INFO] [stdout]     |                                          arguments to this method are incorrect
[INFO] [stdout]     |
[INFO] [stdout]     = note: expected reference `&[Vec<usize>]`
[INFO] [stdout]                   found struct `Vec<Vec<usize>>`
[INFO] [stdout] note: method defined here
[INFO] [stdout]    --> src/simulation.rs:18:12
[INFO] [stdout]     |
[INFO] [stdout]  18 |     pub fn score(mut self, assignment: &[Vec<usize>]) -> (usize, Vec<String>) {
[INFO] [stdout]     |            ^^^^^           -------------------------
[INFO] [stdout] help: consider borrowing here
[INFO] [stdout]     |
[INFO] [stdout] 159 |         let (score, errors) = simulation.score(&assignment);
[INFO] [stdout]     |                                                +
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/simulation.rs:24:21
[INFO] [stdout]    |
[INFO] [stdout] 24 |                 let mut vehicle = &mut self.vehicles[vehicle_id];
[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: variable does not need to be mutable
[INFO] [stdout]   --> src/simulation.rs:25:21
[INFO] [stdout]    |
[INFO] [stdout] 25 |                 let mut ride = &mut self.rides[*ride_id];
[INFO] [stdout]    |                     ----^^^^
[INFO] [stdout]    |                     |
[INFO] [stdout]    |                     help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/solver.rs:52:21
[INFO] [stdout]    |
[INFO] [stdout] 52 |                 let mut ride = &mut self.rides[ride_id];
[INFO] [stdout]    |                     ----^^^^
[INFO] [stdout]    |                     |
[INFO] [stdout]    |                     help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0308`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `hashcode2018` (bin "hashcode2018" test) due to 1 previous error; 3 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "865c825c369d6070aea791265f4f47ed809cca857390e2a58ff1dd99752e61c9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "865c825c369d6070aea791265f4f47ed809cca857390e2a58ff1dd99752e61c9", kill_on_drop: false }`
[INFO] [stdout] 865c825c369d6070aea791265f4f47ed809cca857390e2a58ff1dd99752e61c9
