[INFO] cloning repository https://github.com/briantjt/aoc2021
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/briantjt/aoc2021" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbriantjt%2Faoc2021", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbriantjt%2Faoc2021'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] fdc695a068d8e70d842864f379ab78d33bf0688b
[INFO] checking briantjt/aoc2021 against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbriantjt%2Faoc2021" "/workspace/builds/worker-2-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/briantjt/aoc2021 on toolchain ceab6128fa48a616bfd3e3adf4bc80133b8ee223
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/briantjt/aoc2021
[INFO] finished tweaking git repo https://github.com/briantjt/aoc2021
[INFO] tweaked toml for git repo https://github.com/briantjt/aoc2021 written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/briantjt/aoc2021 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" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded simba v0.6.0
[INFO] [stderr]   Downloaded nalgebra-macros v0.1.0
[INFO] [stderr]   Downloaded paste v1.0.6
[INFO] [stderr]   Downloaded wide v0.7.3
[INFO] [stderr]   Downloaded proc-macro2 v1.0.34
[INFO] [stderr]   Downloaded approx v0.5.0
[INFO] [stderr]   Downloaded scan_fmt v0.2.6
[INFO] [stderr]   Downloaded nalgebra v0.29.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8aa67c4808263c4e3d438cf8edf829bcf735754e621624339e3d7c69c480740a
[INFO] running `Command { std: "docker" "start" "-a" "8aa67c4808263c4e3d438cf8edf829bcf735754e621624339e3d7c69c480740a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8aa67c4808263c4e3d438cf8edf829bcf735754e621624339e3d7c69c480740a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8aa67c4808263c4e3d438cf8edf829bcf735754e621624339e3d7c69c480740a", kill_on_drop: false }`
[INFO] [stdout] 8aa67c4808263c4e3d438cf8edf829bcf735754e621624339e3d7c69c480740a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1b9735fbfce9f9155cdc6064238664e26edcdf068d347bf0561ec17032b1a525
[INFO] running `Command { std: "docker" "start" "-a" "1b9735fbfce9f9155cdc6064238664e26edcdf068d347bf0561ec17032b1a525", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.34
[INFO] [stderr]     Checking bytemuck v1.7.3
[INFO] [stderr]    Compiling syn v1.0.82
[INFO] [stderr]    Compiling num-rational v0.4.0
[INFO] [stderr]    Compiling paste v1.0.6
[INFO] [stderr]     Checking matrixmultiply v0.3.2
[INFO] [stderr]     Checking itertools v0.10.3
[INFO] [stderr]     Checking approx v0.5.0
[INFO] [stderr]     Checking num-complex v0.4.0
[INFO] [stderr]     Checking scan_fmt v0.2.6
[INFO] [stderr]     Checking safe_arch v0.6.0
[INFO] [stderr]     Checking wide v0.7.3
[INFO] [stderr]    Compiling quote v1.0.10
[INFO] [stderr]     Checking simba v0.6.0
[INFO] [stderr]    Compiling nalgebra-macros v0.1.0
[INFO] [stderr]     Checking nalgebra v0.29.0
[INFO] [stderr]     Checking aoc2021 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/Day12/main.rs:28:13
[INFO] [stdout]    |
[INFO] [stdout] 28 |         let mut current = to_explore_paths.last_mut().unwrap();
[INFO] [stdout]    |             ----^^^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/Day10/main.rs:41:13
[INFO] [stdout]    |
[INFO] [stdout] 41 |     Invalid(Col, Bracket),
[INFO] [stdout]    |     ------- ^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 41 |     Invalid((), Bracket),
[INFO] [stdout]    |             ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/Day12/main.rs:28:13
[INFO] [stdout]    |
[INFO] [stdout] 28 |         let mut current = to_explore_paths.last_mut().unwrap();
[INFO] [stdout]    |             ----^^^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/Day10/main.rs:41:13
[INFO] [stdout]    |
[INFO] [stdout] 41 |     Invalid(Col, Bracket),
[INFO] [stdout]    |     ------- ^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 41 |     Invalid((), Bracket),
[INFO] [stdout]    |             ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 11.49s
[INFO] running `Command { std: "docker" "inspect" "1b9735fbfce9f9155cdc6064238664e26edcdf068d347bf0561ec17032b1a525", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1b9735fbfce9f9155cdc6064238664e26edcdf068d347bf0561ec17032b1a525", kill_on_drop: false }`
[INFO] [stdout] 1b9735fbfce9f9155cdc6064238664e26edcdf068d347bf0561ec17032b1a525