[INFO] cloning repository https://github.com/neutonfoo/rust-maze-dfs-solver
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/neutonfoo/rust-maze-dfs-solver" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fneutonfoo%2Frust-maze-dfs-solver", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fneutonfoo%2Frust-maze-dfs-solver'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 8df3dfe8fbda26919fc0e7fa299f4718eb6bf9eb
[INFO] checking neutonfoo/rust-maze-dfs-solver against try#f16624c7fb52ccf15cd304a9728caf1ef4b9c0d2 for pr-156992
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fneutonfoo%2Frust-maze-dfs-solver" "/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/neutonfoo/rust-maze-dfs-solver
[INFO] finished tweaking git repo https://github.com/neutonfoo/rust-maze-dfs-solver
[INFO] tweaked toml for git repo https://github.com/neutonfoo/rust-maze-dfs-solver written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/neutonfoo/rust-maze-dfs-solver on toolchain f16624c7fb52ccf15cd304a9728caf1ef4b9c0d2
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+f16624c7fb52ccf15cd304a9728caf1ef4b9c0d2" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/neutonfoo/rust-maze-dfs-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" "+f16624c7fb52ccf15cd304a9728caf1ef4b9c0d2" "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] 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" "+f16624c7fb52ccf15cd304a9728caf1ef4b9c0d2" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] cc3fa8fde0a2acc8cc829cf303434fbf290bdef2cfad60f252c5e92966516542
[INFO] running `Command { std: "docker" "start" "-a" "cc3fa8fde0a2acc8cc829cf303434fbf290bdef2cfad60f252c5e92966516542", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "cc3fa8fde0a2acc8cc829cf303434fbf290bdef2cfad60f252c5e92966516542", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cc3fa8fde0a2acc8cc829cf303434fbf290bdef2cfad60f252c5e92966516542", kill_on_drop: false }`
[INFO] [stdout] cc3fa8fde0a2acc8cc829cf303434fbf290bdef2cfad60f252c5e92966516542
[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=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" "+f16624c7fb52ccf15cd304a9728caf1ef4b9c0d2" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2d26471dacbd845a3d8ceb8d658184eb4d44a0b1f051631e39e9120aea7bc3a5
[INFO] running `Command { std: "docker" "start" "-a" "2d26471dacbd845a3d8ceb8d658184eb4d44a0b1f051631e39e9120aea7bc3a5", kill_on_drop: false }`
[INFO] [stderr]     Checking rust-maze-dfs-solver v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `visited` is never read
[INFO] [stdout]   --> src/maze.rs:22:3
[INFO] [stdout]    |
[INFO] [stdout] 18 | pub struct Maze {
[INFO] [stdout]    |            ---- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 22 |   visited: HashSet<Point>,
[INFO] [stdout]    |   ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Maze` has a derived impl for the trait `Debug`, but this is 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: field `visited` is never read
[INFO] [stdout]   --> src/maze.rs:22:3
[INFO] [stdout]    |
[INFO] [stdout] 18 | pub struct Maze {
[INFO] [stdout]    |            ---- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 22 |   visited: HashSet<Point>,
[INFO] [stdout]    |   ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Maze` has a derived impl for the trait `Debug`, but this is 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 0.07s
[INFO] running `Command { std: "docker" "inspect" "2d26471dacbd845a3d8ceb8d658184eb4d44a0b1f051631e39e9120aea7bc3a5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2d26471dacbd845a3d8ceb8d658184eb4d44a0b1f051631e39e9120aea7bc3a5", kill_on_drop: false }`
[INFO] [stdout] 2d26471dacbd845a3d8ceb8d658184eb4d44a0b1f051631e39e9120aea7bc3a5
