[INFO] cloning repository https://github.com/mrbrowning/ds-advent
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/mrbrowning/ds-advent" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmrbrowning%2Fds-advent", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmrbrowning%2Fds-advent'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 41f221a1862a7674b54a2e9121249f96c3897bc4
[INFO] checking mrbrowning/ds-advent against master#1f12b9b0fdbe735968ac002792a720f0ba4faca6 for crater-rollup-uwu
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmrbrowning%2Fds-advent" "/workspace/builds/worker-6-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/mrbrowning/ds-advent on toolchain 1f12b9b0fdbe735968ac002792a720f0ba4faca6
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/mrbrowning/ds-advent
[INFO] finished tweaking git repo https://github.com/mrbrowning/ds-advent
[INFO] tweaked toml for git repo https://github.com/mrbrowning/ds-advent written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/mrbrowning/ds-advent 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" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded thiserror-impl v1.0.53
[INFO] [stderr]   Downloaded is-terminal v0.4.10
[INFO] [stderr]   Downloaded thiserror v1.0.53
[INFO] [stderr]   Downloaded termcolor v1.4.0
[INFO] [stderr]   Downloaded env_logger v0.10.1
[INFO] [stderr]   Downloaded rustix v0.38.28
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8ee99833de2a750eadd0f5b511c1a946d4a79a56539b859e0663d07897cf8070
[INFO] running `Command { std: "docker" "start" "-a" "8ee99833de2a750eadd0f5b511c1a946d4a79a56539b859e0663d07897cf8070", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8ee99833de2a750eadd0f5b511c1a946d4a79a56539b859e0663d07897cf8070", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8ee99833de2a750eadd0f5b511c1a946d4a79a56539b859e0663d07897cf8070", kill_on_drop: false }`
[INFO] [stdout] 8ee99833de2a750eadd0f5b511c1a946d4a79a56539b859e0663d07897cf8070
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 598f97c71d8ca8c01b511e075bb066fd3f17736ea0551be635833782bce0f3d2
[INFO] running `Command { std: "docker" "start" "-a" "598f97c71d8ca8c01b511e075bb066fd3f17736ea0551be635833782bce0f3d2", kill_on_drop: false }`
[INFO] [stderr]     Checking memchr v2.6.4
[INFO] [stderr]    Compiling libc v0.2.151
[INFO] [stderr]     Checking futures-sink v0.3.30
[INFO] [stderr]    Compiling serde v1.0.193
[INFO] [stderr]     Checking futures-io v0.3.30
[INFO] [stderr]    Compiling serde_json v1.0.108
[INFO] [stderr]    Compiling anyhow v1.0.75
[INFO] [stderr]    Compiling thiserror v1.0.53
[INFO] [stderr]    Compiling rustix v0.38.28
[INFO] [stderr]     Checking bitflags v2.4.1
[INFO] [stderr]     Checking linux-raw-sys v0.4.12
[INFO] [stderr]     Checking regex-syntax v0.8.2
[INFO] [stderr]     Checking humantime v2.1.0
[INFO] [stderr]     Checking termcolor v1.4.0
[INFO] [stderr]    Compiling syn v2.0.48
[INFO] [stderr]     Checking unicode-ident v1.0.12
[INFO] [stderr]     Checking futures-channel v0.3.30
[INFO] [stderr]     Checking proc-macro2 v1.0.76
[INFO] [stderr]     Checking quote v1.0.35
[INFO] [stderr]     Checking aho-corasick v1.1.2
[INFO] [stderr]     Checking num_cpus v1.16.0
[INFO] [stderr]     Checking is-terminal v0.4.10
[INFO] [stderr]     Checking regex-automata v0.4.3
[INFO] [stderr]     Checking message_macro v0.1.0 (/opt/rustwide/workdir/message_macro)
[INFO] [stderr]    Compiling futures-macro v0.3.30
[INFO] [stderr]    Compiling serde_derive v1.0.193
[INFO] [stderr]    Compiling tokio-macros v2.2.0
[INFO] [stderr]    Compiling thiserror-impl v1.0.53
[INFO] [stderr]     Checking tokio v1.35.1
[INFO] [stderr]     Checking regex v1.10.2
[INFO] [stderr]     Checking futures-util v0.3.30
[INFO] [stderr]     Checking env_logger v0.10.1
[INFO] [stderr]     Checking tokio-stream v0.1.14
[INFO] [stderr]     Checking futures-executor v0.3.30
[INFO] [stderr]     Checking futures v0.3.30
[INFO] [stderr]     Checking maelstrom_csp v0.1.0 (/opt/rustwide/workdir/maelstrom_csp)
[INFO] [stderr]     Checking maelstrom_csp2 v0.1.0 (/opt/rustwide/workdir/maelstrom_csp2)
[INFO] [stderr]     Checking maelstrom v0.1.0 (/opt/rustwide/workdir/maelstrom)
[INFO] [stderr]     Checking old_challenge2 v0.1.0 (/opt/rustwide/workdir/old_challenge2)
[INFO] [stderr]     Checking old_challenge1 v0.1.0 (/opt/rustwide/workdir/old_challenge1)
[INFO] [stderr]     Checking challenge6 v0.1.0 (/opt/rustwide/workdir/challenge6)
[INFO] [stderr]     Checking challenge4 v0.1.0 (/opt/rustwide/workdir/challenge4)
[INFO] [stderr]     Checking challenge5 v0.1.0 (/opt/rustwide/workdir/challenge5)
[INFO] [stderr]     Checking challenge3 v0.1.0 (/opt/rustwide/workdir/challenge3)
[INFO] [stderr]     Checking challenge1 v0.1.0 (/opt/rustwide/workdir/challenge1)
[INFO] [stderr]     Checking challenge2 v0.1.0 (/opt/rustwide/workdir/challenge2)
[INFO] [stdout] warning: struct `RingTopology` is never constructed
[INFO] [stdout]    --> challenge3/src/main.rs:580:8
[INFO] [stdout]     |
[INFO] [stdout] 580 | struct RingTopology {}
[INFO] [stdout]     |        ^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `RingTopology` is never constructed
[INFO] [stdout]    --> challenge3/src/main.rs:580:8
[INFO] [stdout]     |
[INFO] [stdout] 580 | struct RingTopology {}
[INFO] [stdout]     |        ^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 8.00s
[INFO] running `Command { std: "docker" "inspect" "598f97c71d8ca8c01b511e075bb066fd3f17736ea0551be635833782bce0f3d2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "598f97c71d8ca8c01b511e075bb066fd3f17736ea0551be635833782bce0f3d2", kill_on_drop: false }`
[INFO] [stdout] 598f97c71d8ca8c01b511e075bb066fd3f17736ea0551be635833782bce0f3d2